Data Sheet AS3930 S i n g l e C h a n n e l L o w F r e q u e n c y Wa k e u p R e c e i v e r 1 General Description The AS3930 is a single-channel low power ASK receiver that is able to generate a wakeup upon detection of a data signal which uses a LF carrier frequency between 110 - 150 kHz. The integrated correlator can be used for detection of a programmable 16-bit wakeup pattern. The AS3930 provides a digital RSSI value, it supports a programmable data rate and Manchester decoding with clock recovery. The AS3930 offers a real-time clock (RTC), which is either derived from a crystal oscillator or the internal RC oscillator. The programmable features of AS3930 enable to optimize its settings for achieving a longer distance while retaining a reliable wakeup generation. The sensitivity level of AS3930 can be adjusted in presence of a strong field or in noisy environments. The device is available in 16 pin TSSOP and QFN 4x4 16 LD packages. 2 Key Features Single channel ASK wakeup receiver Carrier frequency range 110 - 150 kHz Programmable wakeup pattern (16bits) Doubling of wakeup pattern supported Wakeup without pattern detection supported Highly resistant to false wakeups False wakeup counter Periodical forced wakeup supported (1s - 2h) Low power listening modes Current consumption in listening mode 1.37 A (typ.) Data rate adjustable from 0.5 - 4 kbps (Manchester) Manchester decoding with clock recovery Digital RSSI Dynamic range 64dB 5 bit RSSI step (2dB per step) RTC based on 32kHz XTAL, RC-OSC, or external clock Operating temperature range -40 to +85C Operating supply voltage 2.4 - 3.6V (TA = 25C) Bidirectional serial digital interface (SDI) Package option 16 pin TSSOP, QFN 4x4 16 LD 3 Applications The AS3930 is ideal for Active RFID tags, real-time location systems, operator identification, access control, and wireless sensors. Wakeup sensitivity 100VRMS (typ.) Adjustable sensitivity level www.austriamicrosystems.com/AS3930 Revision 1.0 1 - 33 AS3930 Data Sheet - A p p l i c a t i o n s Figure 1. AS3930 Typical Application Diagram with Crystal Oscillator VCC CL CBAT CS VCC XIN CL_DAT XTAL TX Transmitting Antenna XOUT TRANSMITTER DAT LFP AS3930 WAKE NC SCL NC SDO LFN SDI VSS GND VCC CS Figure 2. AS3930 Typical Application Diagram without Crystal Oscillator VCC CBAT XIN CL_DAT TX Transmitting Antenna XOUT TRANSMITTER www.austriamicrosystems.com/AS3930 DAT LFP AS3930 Revision 1.0 WAKE NC SCL NC SDO LFN SDI VSS GND 2 - 33 AS3930 Data Sheet - A p p l i c a t i o n s Figure 3. AS3930 Typical Application Diagram with Clock from External Source VCC CBAT CS VCC EXTERNAL CLOCK R XIN CL_DAT C TX Transmitting Antenna XOUT TRANSMITTER www.austriamicrosystems.com/AS3930 DAT LFP AS3930 Revision 1.0 WAKE NC SCL NC SDO LFN SDI VSS GND 3 - 33 AS3930 Data Sheet - C o n t e n t s Contents 1 General Description.................................................................................................................................................................... 1 2 Key Features ............................................................................................................................................................................... 1 3 Applications ................................................................................................................................................................................ 1 4 Pin Assignments......................................................................................................................................................................... 5 4.1 TSSOP Package ...................................................................................................................................................................................... 5 4.1.1 Pin Descriptions............................................................................................................................................................................ 5 4.2 QFN Package ........................................................................................................................................................................................... 6 4.2.1 Pin Descriptions............................................................................................................................................................................ 6 5 Absolute Maximum Ratings....................................................................................................................................................... 7 6 Electrical Characteristics........................................................................................................................................................... 8 7 Typical Operating Characteristics........................................................................................................................................... 10 8 Detailed Description ..................................................................................................................................................................11 8.1 Block Diagram ........................................................................................................................................................................................ 11 8.2 Operating modes .................................................................................................................................................................................... 12 8.2.1 8.2.2 8.2.3 8.2.4 Power Down Mode ..................................................................................................................................................................... 12 Listening Mode ........................................................................................................................................................................... 12 Preamble Detection / Pattern Correlation ................................................................................................................................... 12 Data Receiving ........................................................................................................................................................................... 13 8.3 System and Block Specification ............................................................................................................................................................. 13 8.3.1 Main Logic and SDI .................................................................................................................................................................... 13 8.4 Channel Amplifier and Frequency Detector............................................................................................................................................ 18 8.4.1 Frequency Detector / AGC ......................................................................................................................................................... 18 8.4.2 Antenna Damper......................................................................................................................................................................... 19 8.5 Demodulator / Data Slicer ...................................................................................................................................................................... 19 8.6 Correlator................................................................................................................................................................................................ 20 8.7 Wakeup Protocol - Carrier Frequency 125 kHz ...................................................................................................................................... 23 8.7.1 Without pattern detection (Manchester decoder disabled) ......................................................................................................... 23 8.7.2 Single Pattern Detection (Manchester decoder disabled) .......................................................................................................... 23 8.7.3 Single Pattern Detection (Manchester decoder enabled) ........................................................................................................... 25 8.8 False Wakeup Register .......................................................................................................................................................................... 25 8.9 Real Time Clock (RTC)........................................................................................................................................................................... 26 8.9.1 Crystal Oscillator......................................................................................................................................................................... 27 8.9.2 RC-Oscillator .............................................................................................................................................................................. 27 8.9.3 External Clock Source ................................................................................................................................................................ 27 9 Package Drawings and Markings............................................................................................................................................ 29 10 Ordering Information.............................................................................................................................................................. 33 www.austriamicrosystems.com/AS3930 Revision 1.0 4 - 33 AS3930 Data Sheet - P i n A s s i g n m e n t s 4 Pin Assignments 4.1 TSSOP Package Figure 4. Pin Assignments 16 pin TSSOP Package 4.1.1 CS 1 16 CL_DAT SCL 2 15 DAT SDI 3 14 WAKE SDO 4 13 VSS VCC 5 12 XOUT GND 6 11 XIN NC 7 10 LFN NC 8 9 LFP AS3930 Pin Descriptions Table 1. Pin Descriptions 16 pin TSSOP Package Pin Name Pin Number Pin Type Description CS 1 DI Chip select SCL 2 DI SDI interface clock SDI 3 DI SDI data input SDO 4 DO_T SDI data output (tristate when CS is low) VCC 5 S Positive supply voltage GND 6 S Negative supply voltage NC 7 Not Connected NC 8 Not Connected LFP 9 AIO Input antenna LFN 10 AIO Antenna ground XIN 11 AIO Crystal oscillator input XOUT 12 AIO Crystal oscillator output VSS 13 S Substrate WAKE 14 DO Wakeup output IRQ DAT 15 DO Data output CL_DAT 16 DO Manchester recovered clock www.austriamicrosystems.com/AS3930 Revision 1.0 5 - 33 AS3930 Data Sheet - P i n A s s i g n m e n t s 4.2 QFN Package GND VCC SDO SDI Figure 5. Pin Assignments QFN 4x4 16 LD Package 16 15 14 13 12 SCL NC 1 NC 2 11 CS AS3930 LFP 3 10 CL_DAT LFN 4 4.2.1 6 7 8 XIN XOUT VSS WAKE 9 DAT 5 Pin Descriptions Table 2. Pin Descriptions QFN 4x4 16 LD Package Pin Name Pin Number NC 1 Not connected NC 2 Not connected LFP 3 AIO Input antenna LFN 4 AIO Antenna ground XIN 5 AIO Crystal oscillator input XOUT 6 AIO Crystal oscillator output VSS 7 S Substrate WAKE 8 DO Wakeup output IRQ DAT 9 DO Data output CL_DAT 10 DO Manchester recovered clock CS 11 DI Chip select SCL 12 DI SDI interface clock SDI 13 DI SDI data input SDO 14 DO_T SDI data output (tristate when CS is low) VCC 15 S Positive supply voltage GND 16 S Negative supply voltage Pin Type Description Note: PIN Types: S: supply pad AIO: analog I/O DI: digital input DO: digital output DO_T: digital output / tristate www.austriamicrosystems.com/AS3930 Revision 1.0 6 - 33 AS3930 Data Sheet - A b s o l u t e M a x i m u m R a t i n g s 5 Absolute Maximum Ratings Stresses beyond those listed in Table 3 may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated in Section 6 Electrical Characteristics on page 8 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 3. Absolute Maximum Ratings Parameter Min Max Units DC supply voltage (VDD) -0.5 5 V Notes Input pin voltage (VIN) -0.5 5 V Input current (latch up immunity) (ISOURCE) -100 100 mA Norm: Jedec 78 Electrostatic discharge (ESD) 2 kV Norm: MIL 883 E method 3015 (HBM) Total power dissipation (all supplies and outputs) (Pt) Storage temperature (Tstrg) -65 Package body temperature (Tbody) Humidity non-condensing 5 0.07 mW 150 C 260 C 85 % Norm: IPC/JEDEC J-STD-020C 1 1. The reflow peak soldering temperature (body temperature) is specified according IPC/JEDEC J-STD-020C "Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices". www.austriamicrosystems.com/AS3930 Revision 1.0 7 - 33 AS3930 Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s 6 Electrical Characteristics Table 4. Electrical Characteristics Symbol Parameter Conditions Min Typ Max Units 3.6 V Operating Conditions AVDD Positive supply voltage 2.4 AVSS Negative supply voltage 0 0 V TAMB Ambient temperature -40 85 C DC/AC Characteristics for Digital Inputs and Outputs CMOS Input VIH High level input voltage 0.58 * VDD 0.7 * VDD 0.83 * VDD V VIL Low level input voltage 0.125 * VDD 0.2 * VDD 0.3 * DVDD V ILEAK Input leakage current 100 nA CMOS Output VDD 0.4 VOH High level output voltage With a load current of 1mA VOL Low level output voltage With a load current of 1mA VSS + 0.4 V CL Capacitive load For a clock frequency of 1 MHz 400 pF VOH High level output voltage With a load current of 1mA VOL Low level output voltage With a load current of 1mA VSS + 0.4 V IOZ Tristate leakage current to DVDD and DVSS 100 nA Max Units V Tristate CMOS Output VDD 0.4 V Table 5. Electrical System Specifications Symbol Parameter Conditions Rin Input Impedance In case no antenna damper is set (R1<4>=0) Fmin Fmax Min Typ Input Characteristics 2 M Minimum Input Frequency 110 kHz Maximum Input Frequency 150 kHz Current Consumption IPWD Power Down Mode 400 ICHRC Current Consumption in standard listening mode with channel active all the time and RC-oscillator as RTC 2.7 ICHOORC Current Consumption in ON/ OFF mode and RC-oscillator as RTC ICHXT Current Consumption in standard listening mode and crystal oscillator as RTC www.austriamicrosystems.com/AS3930 11% Duty Cycle 1.37 50% Duty Cycle 2 3.5 Revision 1.0 800 nA A A 5.9 A 8 - 33 AS3930 Data Sheet - E l e c t r i c a l C h a r a c t e r i s t i c s Table 5. Electrical System Specifications Symbol Parameter Conditions IDATA Current Consumption in Preamble detection / Pattern correlation / Data receiving mode (RC-oscillator) Input Sensitivity on all channels Min Typ Max Units With 125 kHz carrier frequency and 1 kbps data-rate. No load on the output pins. 5.3 9 A With 125kHz carrier frequency, chip in default mode, 4 half bits burst + 4 symbols preamble and single preamble detection 100 Vrms 250 s 32.768 kHz Input Sensitivity SENS Channel Settling Time TSAMP Amplifier settling time Crystal Oscillator FXTAL Frequency Crystal dependent TXTAL Start-up Time Crystal dependent IXTAL Current consumption 1 s 1 A 1 A External Clock Source IEXTCL Current consumption RC Oscillator FRCNCAL Frequency If no calibration is performed 27 32.768 42 kHz FRCCAL32 Frequency If calibration with 32.768 kHz reference signal is performed 31 32.768 34.5 kHz FRCCALMAX Frequency Maximum achievable frequency after calibration 35 kHz FRCCALMIN Frequency Minimum achievable frequency after calibration 30 kHz TCALRC Calibration time IRC Current consumption www.austriamicrosystems.com/AS3930 65 200 Revision 1.0 Periods of reference clock nA 9 - 33 AS3930 Data Sheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s 7 Typical Operating Characteristics Figure 6. Sensitivity over Voltage and Temperature Figure 7. Sensitivity over RSSI 1000000 120 VIN = 2.4V 95 oC 100000 100 27 oC VIN = 1.5V Input Voltage [Vrms] -40 oC Sensitivity [Vrms] 80 60 40 10000 VIN = 1.0V 1000 100 10 20 1 0 2.4 3 2 3.6 4 6 8 10 12 14 16 18 20 22 24 26 28 30 RSSI [dB] Supply Voltage [V] Figure 8. RC-Osc Frequency over Voltage (calibr.) Figure 9. RC-Osc Frequency over Temperature (calibr.) 34.5 34.5 34 33.5 RC-OSC Frequency [KHz] RC-OSC Frequency [KHz] 34 33 32.5 33.5 33 32.5 32 32 31.5 31.5 31 31 2.4 2.6 2.8 3 3.2 3.4 -36 -30 -20 -10 3.6 www.austriamicrosystems.com/AS3930 0 10 20 30 40 50 60 70 80 90 Operating Temperature [oC] Supply Voltage [V] Revision 1.0 10 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n 8 Detailed Description The AS3930 is a one-dimensional low power low-frequency wakeup receiver. The AS3930 is capable to detect the presence of an inductive coupled carrier and extract the envelope of the On-Off-Keying (OOK) modulated carrier. In case the carrier is Manchester coded the clock is recovered from the transmitted signal and the data can be correlated with a programmed pattern. If the detected pattern corresponds to the stored one, a wake-up signal (IRQ) is risen up. The pattern correlation can be bypassed in case and the wake-up detection is based only on the frequency detection. The AS3930 is made up of a single receiving channel, one envelop detector, one data correlator, one Manchester decoder, 8 programmable registers with the main logic and a real time clock. The digital logic can be accessed by an SDI. The real time clock can be based on a crystal oscillator or on an internal RC. In case internal RC is used to improve its accuracy a calibration can be performed. 8.1 Block Diagram Figure 10. Block Diagram AS3930 IRQ Wakeup SCL Main Logic SDI SDI SDO RSSI CS Channel Amplifier LF1P Envelope Detector / Data Slicer Correlator Manchester Decoder DAT CL_DAT I/V Bias Xtal RTC RC RTC LFN VCC www.austriamicrosystems.com/AS3930 GND XIN XOUT Revision 1.0 11 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n AS3930 needs the following external components: Power supply capacitor - CBAT - 100 nF 32.768 kHz crystal with its two pulling capacitors - XTAL and CL (it is possible to omit these components if the internal RC oscillator is used instead of the crystal oscillator). Input LC resonator. In case the internal RC-oscillator is used (no crystal oscillator is mounted), the pin XIN has to be connected to the supply, while pin XOUT should stay floating. Application diagrams with and without crystal are shown in Figure 1 and Figure 2 8.2 Operating modes 8.2.1 Power Down Mode In Power Down Mode AS3930 is completely switched off. The typical current consumption is 400 nA. 8.2.2 Listening Mode In listening mode only the channel amplifier and the RTC are running. In this mode the system detects the presence of a carrier. In case the carrier is detected the RSSI can be displayed. Inside this mode it is possible to distinguish the following three sub modes: 8.2.2.1 Standard Listening mode The channel amplifier, capable to detect the presence of the carrier frequency, is active all the time. 8.2.2.2 ON/OFF mode (Low Power mode) The channel amplifier is active for one millisecond to be than switched-off for a certain time. The OFF-time is programmable see R4<7:6>. Figure 11. ON/OFF Mode Channel t0 t0 + 1ms t0 + T t0 + T + 1ms t0 + 2T Time Presence of Carrier Time For both sub modes it is possible to enable a further feature called Artificial Wake-up. If the Artificial Wakeup is enabled the AS3930 produces an interrupt after a certain time regardless whether any activity is detected on the input. The period of the Artificial Wake-up is defined in the register R8<2:0>. The user can distinguish between Artificial Wake-up and Wake-up based on the field detection (frequency or pattern detection) since the Artificial Wake-up interrupt lasts only 128 s. With this interrupt the microcontroller (C) can get feedback on the surrounding environment (e.g. read the false wakeup register, see relator register R13<7:0>) and/or take actions in order to change the setup. 8.2.3 Preamble Detection / Pattern Correlation The chip can go in to this mode after detecting a LF carrier only if the data correlator function is enabled see R1<1>. The correlator searches first for preamble frequency (constant frequency of Manchester clock defined according to bit-rate transmission) and then for data pattern. If the pattern is matched the wake-up interrupt is displayed on the WAKE output and the chip goes in data receiving mode. If the pattern fails the internal wake-up is terminated and no IRQ is produced. www.austriamicrosystems.com/AS3930 Revision 1.0 12 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n 8.2.4 Data Receiving The user can enable this mode allowing the pattern correlation or just on the base of the frequency detection. In this mode the chip can be retained as a normal OOK receiver. The data is provided on the DAT pin and in case the Manchester decoder is enabled see R1<3>, the recovered clock is present on the CL_DAT. It is possible to put the chip back to listening mode either with a direct command (CLEAR_WAKE (see Table 12)) or by using the timeout feature. This feature automatically sets the chip back to listening mode after a certain time defined in the R7<7:5>. 8.3 System and Block Specification 8.3.1 8.3.1.1 Main Logic and SDI Register Table Table 6. Register Table 7 6 R0 5 n.a. R1 ABS_HY R2 S_ABSH R3 HY_20m R4 4 3 AGC_UD ATT_ON EN_MANCH W_PAT_T<1:0> EN_WPAT EN_RTC GR<3:0> R6 TS1<7:0> T_OUT<2:0> T_HBIT<4:0> n.a. n.a. T_AUTO<2:0> Reserved R10 n.a. RSSI1<4:0> R11 n.a. RSSI3<4:0> R12 n.a. RSSI2<4:0> R13 8.3.1.2 PWD FS_ENV<2:0> TS2<7:0> R9 EN_A S_WU1<1:0> R_VAL<1:0> R8 EN_PAT2 FS_SLC<2:0> R5 R7 0 Reserved HY_POS T_OFF<1:0> 1 Reserved ON_OFF AGC_TLIM 2 F_WAKE Register Table Description and Default Values Table 7. Default Values of Registers Register Name Type Default Value Description R0<5> ON_OFF W 0 On/Off operation mode. (Duty-cycle defined in the register R4<7:6>) R0<4> MUX_123 W 0 Reserved (it is not allowed to set this bit to 1) R0<3> Reserved W 1 Reserved R0<2> Reserved W 1 Reserved R0<1> EN_A W 1 Channel enable R0<0> PWD W 0 Power down R1<7> ABS_HY W 0 Data slicer absolute reference R1<6> AGC_TLIM W 0 AGC acting only on the first carrier burst R1<5> AGC_UD W 1 AGC operating in both direction (up-down) R1<4> ATT_ON W 0 Antenna damper enable R1<3> EN_MANCH W 0 Manchester decoder enable www.austriamicrosystems.com/AS3930 Revision 1.0 13 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n Table 7. Default Values of Registers Register Name Type Default Value Description R1<2> EN_PAT2 W 0 Double wakeup pattern correlation R1<1> EN_WPAT W 1 Data correlation enable R1<0> EN_RTC W 1 Crystal oscillator enable R2<7> S_ABSH W 0 Data slicer threshold reduction R2<6:5> W_PAT W 00 Pattern correlation tolerance (see Table 19) 000 Reserved R2<4:2> R2<1:0> S_WU1 W 00 Tolerance setting for the stage wakeup (see Table 13) R3<7> HY_20m W 0 Data slicer hysteresis if HY_20m = 0 then comparator hysteresis = 40mV if HY_20m = 1 then comparator hysteresis = 20mV R3<6> HY_POS W 0 Data slicer hysteresis only on positive edges (HY_POS=0, hysteresis on both edges, HY_POS=1, hysteresis only on positive edges) R3<5:3> FS_SCL W 100 Data slices time constant (see Table 17) R3<2:0> FS_ENV W 000 Envelop detector time constant (see Table 16) Off time in ON/OFF operation mode R4<7:6> T_OFF W 00 T_OFF=00 1ms T_OFF=01 2ms T_OFF=10 4ms T_OFF=11 8ms R4<5:4> D_RES W 01 Antenna damping resistor (see Table 15) R4<3:0> GR W 0000 Gain reduction (see Table 14) R5<7:0> TS2 W 01101001 2 Byte of wakeup pattern R6<7:0> TS1 W 10010110 1 Byte of wakeup pattern R7<7:5> T_OUT W 000 Automatic time-out (see Table 20) R7<4:0> T_HBIT W 01011 Bit rate definition (see Table 18) nd st Artificial wake-up R8<2:0> T_AUTO W R9<6:0> R10<4:0> 000 T_AUTO=000 No artificial wake-up T_AUTO=001 1 sec T_AUTO=010 5 sec T_AUTO=011 20 sec T_AUTO=100 2 min T_AUTO=101 15min T_AUTO=110 1 hour T_AUTO=111 2 hour 000000 RSSI Reserved R RSSI channel R11<4:0> www.austriamicrosystems.com/AS3930 Reserved Revision 1.0 14 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n Table 7. Default Values of Registers Register Name Default Value Type Description R12<4:0> Reserved R13<7:0> 8.3.1.3 F_WAK WR False wakeup register Serial Data Interface (SDI) This 4-wire interface is used by the Microcontroller (C) to program the AS3930. The maximum clock operation frequency of the SDI is 2 MHz. Table 8. Serial Data Interface (SDI) pins Name Signal Signal Level Description CS Digital Input with pull down CMOS Chip Select SDI Digital Input with pull down CMOS Serial Data input for writing registers, data to transmit and/or writing addresses to select readable register SDO Digital Output CMOS Serial Data output for received data or read value of selected registers SCLK Digital Input with pull down CMOS Clock for serial data read and write Note: SDO is set to tristate if CS is low. In this way more than one device can communicate on the same SDO bus. SDI Command Structure To program the SDI the CS signal has to go high. A SDI command is made up by a two bytes serial command and the data is sampled on the falling edge of SCLK. The Table 9 shows how the command looks like, from the MSB (B15) to LSB (B0). The command stream has to be sent to the SDI from the MSB (B15) to the LSB (B0). Table 9. SDI Command Structure Mode B15 Register address / Direct Command B14 B13 B12 B11 B10 B9 Register Data B8 B7 B6 B5 B4 B3 B2 B1 B0 The first two bits (B15 and B14) define the operating mode. There are three modes available (write, read, direct command) plus one spare (not used), as shown in Table 10. Table 10. SDI Command Structure B15 B14 Mode 0 0 WRITE 0 1 READ 1 0 NOT ALLOWED 1 1 DIRECT COMMAND In case a write or read command happens the next 5 bits (B13 to B9) define the register address which has to be written respectively read, as shown in Table 11. Table 11. SDI Command Structure B13 B12 B11 B10 B9 B8 Read/Write register 0 0 0 0 0 0 R0 0 0 0 0 0 1 R1 0 0 0 0 1 0 R2 0 0 0 0 1 1 R3 www.austriamicrosystems.com/AS3930 Revision 1.0 15 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n Table 11. SDI Command Structure B13 B12 B11 B10 B9 B8 Read/Write register 0 0 0 1 0 0 R4 0 0 0 1 0 1 R5 0 0 0 1 1 0 R6 0 0 0 1 1 1 R7 0 0 1 0 0 0 R8 0 0 1 0 0 1 R9 0 0 1 0 1 0 R10 0 0 1 0 1 1 R11 0 0 1 1 0 0 R12 0 0 1 1 0 1 R13 The last 8 bits are the data that has to be written respectively read. A CS toggle high-low-high terminates the command mode. If a direct command is sent (B15-B14=11) the bits from B13 to B9 defines the direct command while the last 8 bits are omitted. The Table 12 shows all possible direct commands: Table 12. List of Direct Commands COMMAND_MODE B13 B12 B11 B10 B9 B8 clear_wake 0 0 0 0 0 0 reset_RSSI 0 0 0 0 0 1 trim_osc 0 0 0 0 1 0 clear_false 0 0 0 0 1 1 preset_default 0 0 0 1 0 0 All direct commands are explained below: - clear_wake: clears the wake state of the chip. In case the chip has woken up (WAKE pin is high) the chip is set back to listening mode reset_RSSI: resets the RSSI measurement. trim_osc: starts the trimming procedure of the internal RC oscillator (see Figure 21) clear_false: resets the false wakeup register (R13=00) preset_default: sets all register in the default mode, as shown in Figure 7 Note: In order to get the AS3930 work properly after sending the preset_default direct command, it is mandatory to write the R0<3:2>=00 Writing of Data to Addressable Registers (WRITE Mode) The SDI is sampled at the falling edge of CLK (as shown in the following diagrams). A CS toggling high-low-high indicates the end of the WRITE command after register has been written. The following example shows a write command. www.austriamicrosystems.com/AS3930 Revision 1.0 16 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n Figure 12. Writing of a single Byte (falling edge sampling) CS SCLK SDI X 0 0 A5 A4 A3 A2 SCLK raising edge Data is transfered from C Two leading Zeros indicate WRITE Mode A1 A0 D7 D6 D5 D4 D3 D2 SCLK falling edge Data is sampled D1 X D0 CS falling edge signals end of WRITE Mode Data is moved to Address A5-A0 Figure 13. Writing of Register Data with auto-incrementing Address CS SCLK SDI X 0 0 A A A A A A D D D D D D D D D D D D D D D D D D 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 Two leading Zeros indicate WRITE Mode Data is moved to Address <A5-A0> Dat a is mov ed to Addres s <A5-A0> + 1 D D D D D D D D D D 1 0 7 6 5 4 3 2 1 0 Data is moved to Addres s <A5-A0 > + (n- 1) X Data is moved to Address <A5-A0 > + n CS falling edge signals end of WRITE Mode Reading of Data from Addressable Registers (READ Mode) Once the address has been sent through SDI, the data can be fed through the SDO pin out to the microcontroller. A CS LOW toggling high-low-high has to be performed after finishing the read mode session, in order to indicate the end of the READ command and prepare the Interface to the next command control Byte. To transfer bytes from consecutive addresses, SDI master has to keep the CS signal high and the SCLK clock has to be active as long as data need to be read. Figure 14. Reading of a single Register Byte CS SCLK SDI X 0 1 SDO A5 A4 A3 A2 A1 X 01 pattern indicates READ Mode X A0 D7 SCLK raising edge Dat a is transfered from C www.austriamicrosystems.com/AS3930 SCLK falling edge Data is sampled D6 SCLK rais ing edge Data is mov ed f rom Address <A5-A0> Revision 1.0 D5 D4 D3 SCLK falling edge Data is transfered to C D2 D1 D0 X CS falling edge signals end of READ Mode 17 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n Figure 15. Send Direct COMMAND Byte 8.4 Channel Amplifier and Frequency Detector The channel amplifier consists of a variable gain amplifier (VGA), an automatic gain control, and a frequency detector. The latter detects the presence of a carrier. As soon as the carrier is detected the AGC is enabled, the gain of the VGA is reduced and set to the right value and the RSSI can be displayed. 8.4.1 Frequency Detector / AGC The frequency detection uses the RTC as time base. In case the internal RC oscillator is used as RTC, it must be calibrated, but the calibration is guaranteed for a 32.768 kHz crystal oscillator only. The frequency detection criteria can be tighter or more relaxed according to the setup described in R2<1:0>(see Table 13). Table 13. Tolerance settings for Wakeup R2<1> R2<0> Tolerance 0 0 relaxed 0 1 tighter (medium) 1 0 stringent 1 1 Reserved The AGC can operate in two modes: AGC down only (R1<5>=0) AGC up and down (R1<5>=1) As soon as the AGC starts to operate, the gain in the VGA is set to maximum. If the AGC down only mode is selected, the AGC can only decrease the gain. Since the RSSI is directly derived from the VGA gain, the system holds the RSSI peak. When the AGC up and down mode is selected, the RSSI can follow the input signal strength variation in both directions. Regardless which AGC operation mode is used, the AGC needs maximum 35 carrier periods to settle. The RSSI is stored in the register R10<4:0>. Both AGC modes (only down or down and up) can also operate with time limitation. This option allows AGC operation only in time slot of 256s following the internal wake-up. Then the AGC (RSSI) is frozen till the wake-up or RSSI reset occurs. The RSSI is reset either with the direct command 'clear_wakeup' or 'reset_RSSI'. The 'reset_RSSI' command resets only the AGC setting but does not terminate wake-up condition. This means that if the signal is still present the new AGC setting (RSSI) will appear not later than 300s (35 LF carrier periods) after the command was received. The AGC setting is reset if for duration of 3 Manchester half symbols no carrier is detected. If the wake-up IRQ is cleared the chip will go back to listening mode. www.austriamicrosystems.com/AS3930 Revision 1.0 18 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n In case the maximum amplification at the beginning is a drawback (e.g. in noisy environment) it is possible to set a smaller starting gain on the amplifier, according to the Table 14. In this way it is possible to reduce the false frequency detection. Table 14. Bit setting of Gain Reduction R4<3> R4<2> R4<1> R4<0> Gain reduction 0 0 0 0 no gain reduction 0 0 0 1 n.a. 0 0 1 0 or 1 n.a. 0 1 0 0 or 1 -4dB 0 1 1 0 or 1 -8dB 1 0 0 0 or 1 -12dB 1 0 1 0 or 1 -16dB 1 1 0 0 or 1 -20dB 1 1 1 0 or 1 -24dB 8.4.2 Antenna Damper The antenna damper allows the chip to deal with higher field strength, it is enabled by register R1<4>. It consists of shunt resistors which degrade the quality factor of the resonator by reducing the signal at the input of the amplifier. In this way the resonator sees a smaller parallel resistance (in the band of interest) which degrades its quality factor in order to increase the linear range of the channel amplifier (the amplifier doesn't saturate in presence of bigger signals). Table 15 shows the bit setup. Table 15. Antenna Damper Bit Setup R4<5> R4<4> Shunt resistor (parallel to the resonator at 125 kHz) 0 0 1 k 0 1 3 k 1 0 9 k 1 1 27 k 8.5 Demodulator / Data Slicer The performance of the demodulator can be optimized according to bit rate and preamble length as described in Table 16 and Table 17. Table 16. Bit setup for Envelop Detector for Different Symbol Rates R3<2> R3<1> R3<0> Symbol rate [Manchester symbols/s] 0 0 0 4096 0 0 1 2184 0 1 0 1490 0 1 1 1130 1 0 0 910 1 0 1 762 1 1 0 655 1 1 1 512 www.austriamicrosystems.com/AS3930 Revision 1.0 19 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n If the bit rate gets higher, the time constant in the envelop detector must be set to a smaller value, this means that higher noise is injected because of the wider band. The next table is a rough indication of how the envelop detector looks like for different bit rates. By using proper data slicer settings it is possible to improve the noise immunity paying the penalty of a longer preamble. In fact if the data slicer has a bigger time constant it is possible to reject more noise, but every time a transmission occurs, the data slicer need time to settle. This settling time will influence the length of the preamble. Table 17 gives a correlation between data slicer setup and minimum required preamble length. Table 17. Bit setup for Data Slicer for Different Preamble Length R3<5> R3<4> R3<3> Minimum preamble length [ms] 0 0 0 0.8 0 0 1 1.15 0 1 0 1.55 0 1 1 1.9 1 0 0 2.3 1 0 1 2.65 1 1 0 3 1 1 1 3.5 Note: These times are minimum required, but it is recommended to prolong the preamble. The comparator of the data slicer can work only with positive or with symmetrical threshold (R3<6>). In addition the threshold can be 20 or 40 mV (R3<7>) In case the length of the preamble is an issue the data slicer can also work with an absolute threshold (R1<7>). In this case the bits R3<2:0> would not influence the performance. It is even possible to reduce the absolute threshold in case the environment is not particularly noisy (R2<7>). 8.6 Correlator After frequency detection the data correlation is only performed if the correlator is enabled (R1<1>=1). The data correlation consists of checking the presence of a preamble (ON/OFF modulated carrier) followed by a certain pattern. After the frequency detection the correlator waits 16 bits (see bit rate definition in Table 18) and if no preamble is detected the chip is set back to listening mode and the false-wakeup register (R13<7:0>) is incremented by one. To get started with the pattern correlation the correlator needs to detect at least 4 bits of the preamble (ON/OFF modulated carrier). The bit duration is defined in the register R7<4:0> according to the Table 18 as function of the Real Time Clock (RTC) periods. Table 18. Bit Rate Setup R7<4> R7<3> R7<2> R7<1> R7<0> Bit duration in RTC clock periods Bit rate (bits/s) Symbol rate (Manchester symbols/s) 0 0 0 1 1 4 8192 4096 0 0 1 0 0 5 6552 3276 0 0 1 0 1 6 5460 2730 0 0 1 1 0 7 4680 2340 0 0 1 1 1 8 4096 2048 0 1 0 0 0 9 3640 1820 0 1 0 0 1 10 3276 1638 0 1 0 1 0 11 2978 1489 0 1 0 1 1 12 2730 1365 0 1 1 0 0 13 2520 1260 0 1 1 0 1 14 2340 1170 www.austriamicrosystems.com/AS3930 Revision 1.0 20 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n Table 18. Bit Rate Setup R7<4> R7<3> R7<2> R7<1> R7<0> Bit duration in RTC clock periods Bit rate (bits/s) Symbol rate (Manchester symbols/s) 0 1 1 1 0 15 2184 1092 0 1 1 1 1 16 2048 1024 1 0 0 0 0 17 1926 963 1 0 0 0 1 18 1820 910 1 0 0 1 0 19 1724 862 1 0 0 1 1 20 1638 819 1 0 1 0 0 21 1560 780 1 0 1 0 1 22 1488 744 1 0 1 1 0 23 1424 712 1 0 1 1 1 24 1364 682 1 1 0 0 0 25 1310 655 1 1 0 0 1 26 1260 630 1 1 0 1 0 27 1212 606 1 1 0 1 1 28 1170 585 1 1 1 0 0 29 1128 564 1 1 1 0 1 30 1092 546 1 1 1 1 0 31 1056 528 1 1 1 1 1 32 1024 512 If the preamble is detected correctly the correlator keeps searching for a data pattern. The duration of the preamble plus the pattern should not be longer than 40 bits (see bit rate definition in Table 18). The data pattern can be defined by the user and consists of two bytes which are stored in the registers R5<7:0> and R6<7:0>. The two bytes define the pattern consisting of 16 half bit periods. This means the pattern and the bit period can be selected by the user. The only limitation is that the pattern (in combination with preamble) must obey Manchester coding and timing. It must be noted that according to Manchester coding a down-to-up bit transition represents a symbol "0", while a transition up-to-down represents a symbol "1". If the default code is used (96 [hex]) the binary code is (10 01 01 10 01 10 10 01). MSB has to be transmitted first. The user can also select (R1<2>) if single or double data pattern is used for wake-up. In case double pattern detection is set, the same pattern has to be repeated 2 times. Additionally it is possible to set the number of allowed missing zero bits (not symbols) in the received bitstream (R2<6:5>), as shown in the Table 19. Table 19. Allowed Pattern Detection Errors R2<6> R2<5> Maximum allowed error in the pattern detection 0 0 No error allowed 0 1 1 missed zero 1 0 2 missed zeros 1 1 3 missed zeros If the pattern is matched the wake-up interrupt is displayed on the WAKE output. In case the Manchester decoder is enabled (R1<3>) the data coming out from the DAT pin are decoded and the clock is recovered on the pin DAT_CL. The data coming out from the DAT pin are stable (and therefore can be acquired) on the rising edge of the CL_DAT clock, as shown in Figure 16. www.austriamicrosystems.com/AS3930 Revision 1.0 21 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n Figure 16. Synchronization of Data with Recovered Manchester clock CL_DAT DAT If the pattern detection fails the internal wake-up (on all active channels) is terminated with no signal sent to MCU and the false wakeup register will be incremented (R13<7:0>). The wake-up state is terminated with the direct command `clear_wake' Table 12. This command terminates the MCU activity. The termination can also be automatic in case there is no response from MCU. The time out for automatic termination is set in a register R7<7:5>, as shown in the Table 20. Table 20. Timeout Setup R7<7> R7<6> R7<5> Time out 0 0 0 0 sec 0 0 1 50 msec 0 1 0 100 msec 0 1 1 150 msec 1 0 0 200 msec 1 0 1 250 msec 1 1 0 300 msec 1 1 1 350 msec www.austriamicrosystems.com/AS3930 Revision 1.0 22 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n 8.7 Wakeup Protocol - Carrier Frequency 125 kHz 8.7.1 Without pattern detection (Manchester decoder disabled) Figure 17. Wakeup Protocol Overview without Pattern Detection (only carrier frequency detection, Manchester decoder disabled) In case the data correlation is disabled (R1<1>=0) the AS3930 wakes up upon detection of the carrier frequency only as shown in Figure 17. In order to ensure that AS3930 wakes up the carrier burst has to last longer than 550 s. To set AS3930 back to listening mode there are two possibilities: either the microcontroller sends the direct command clear_wake via SDI or the time out option is used (R7<7:5>). In case the latter is chosen,AS3930is automatically set to listening mode after the time defined in T_OUT (R7<7:5>), counting starts at the low-to-high WAKE edge on the WAKE pin. 8.7.2 Single Pattern Detection (Manchester decoder disabled) The Figure 18 shows the wakeup protocol in case the pattern correlation is enabled (R1<1>=1) for a 125 kHz carrier frequency. The initial carrier burst has to be longer than 550 s and can last maximum 16 bits (see bit rate definition in Table 18). If the ON/OFF mode is used (R1<5>=1), the minimum value of the maximum carrier burst duration is limited to 10 ms. This is summarized in Table 21. In case the carrier burst is too long the internal wakeup will be set back to low and the false wakeup counter (R13<7:0>) will be incremented by one. The carrier burst must be followed by a preamble (0101... modulated carrier with a bit duration defined in Table 18) and the wakeup pattern stored in the registers R5<7:0> and R6<7:0>. The preamble must have at least 4 bits and the preamble duration together with the pattern should not be longer than 40 bits. If the wakeup pattern is correct the signal on the WAKE pin is set to high and the data transmission can get started. To set the chip back to listening mode the direct command clear_false, as well as the time out option (R7<7:5>) can be used. www.austriamicrosystems.com/AS3930 Revision 1.0 23 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n Figure 18. Wakeup Protocol Overview with Single Pattern Detection (Manchester decoder disabled) Table 21. Preamble Requirements in Standard Mode, Scanning Mode and ON/OFF Mode Bit rate (bit/s) Maximum duration of the carrier burst in Standard Mode and Scanning Mode (ms) Maximum duration of the carrier burst in ON/OFF Mode (ms) 8192 1.95 10 6552 2.44 10 5460 2.93 10 4680 3.41 10 4096 3.90 10 3640 4.39 10 3276 4.88 10 2978 5.37 10 2730 5.86 10 2520 6.34 10 2340 6.83 10 2184 7.32 10 2048 7.81 10 1926 8.30 10 1820 8.79 10 1724 9.28 10 1638 9.76 10 1560 10.25 10.25 1488 10.75 10.75 1424 11.23 11.23 1364 11.73 11.73 1310 12.21 12.21 1260 12.69 12.69 www.austriamicrosystems.com/AS3930 Revision 1.0 24 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n Table 21. Preamble Requirements in Standard Mode, Scanning Mode and ON/OFF Mode Bit rate (bit/s) Maximum duration of the carrier burst in Standard Mode and Scanning Mode (ms) Maximum duration of the carrier burst in ON/OFF Mode (ms) 1212 13.20 13.20 1170 13.67 13.67 1128 14.18 14.18 1092 14.65 14.65 1056 15.15 15.15 1024 15.62 15.62 8.7.3 Single Pattern Detection (Manchester decoder enabled) The Figure 19 shows the wakeup protocol in case both the pattern correlation and the Manchester decoder are enabled (R1<1>=1 and R1<3>=1) for a 125 kHz carrier frequency. The initial carrier burst has to be at least 42 Manchester symbols long and has to be followed by a separation bit (one bit of no-carrier). The carrier burst must be followed by a minimum 4 Manchester symbol preamble (10101010) and the pattern stored in the R5<7:0> and R6<7:0>. The preamble can only be made up by integer Manchester symbol and the preamble duration together with the pattern should not be longer than 40 bits. If the pattern is correct the signal on the WAKE pin is set to high, the data are internally decoded and the Manchester clock is recovered. To set the AS3930 back to listening mode the direct command clear_false or the time out option (R7<7:5>) can be used. In case the On/OFF mode is enabled the Manchester decoder can not be used. Figure 19. Wakeup Protocol Overview with Single Pattern Detection (Manchester decoder enabled) 8.8 False Wakeup Register The wakeup strategy in the AS3930 is based on 2 steps: 1. Frequency Detection: in this phase the frequency of the received signal is checked. 2. Pattern Correlation: here the pattern is demodulated and checked whether it corresponds to the valid one. If there is a disturber or noise capable to overcome the first step (frequency detection) without producing a valid pattern, then a false wakeup call happens.Each time this event is recognized a counter is incremented by one and the respective counter value is stored in a memory cell (false wakeup register). Thus, the microcontroller can periodically look at the false wakeup register, to get a feeling how noisy the surrounding environment is and can then react accordingly (e.g. reducing the gain of the LNA during frequency detection, set the AS3930 temporarily to power down etc.), as shown in the Figure 20. The false wakeup counter is a useful tool to quickly adapt the system to any changes in the noise environment and thus avoid false wakeup events. www.austriamicrosystems.com/AS3930 Revision 1.0 25 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n Most wakeup receivers have to deal with environments that can rapidly change. By periodically monitoring the number of false wakeup events it is possible to adapt the system setup to the actual characteristics of the environment and enables a better use of the full flexibility of AS3930. Note: If the Manchester decoder is enabled, the false wakeup register is not able to store the false wakeup events. Figure 20. Concept of False Wakeup Register together with System Wakeup Level2 Wakeup Level1 Frequency Detector Pattern Correlator WAKE Unsuccessful pattern correlation False wakeup register CHANGE SETUP TO MINIMIZE THE FALSE WAKEUP EVENTS Register Setup READ FALSE WAKEUP REGISTER Microcontroller 8.9 Real Time Clock (RTC) The RTC can be based on a crystal oscillator (R1<0>=1), the internal RC-oscillator (R1<0>=0) or an external clock source (R1<0>=1). The crystal has higher precision of the frequency but a higher current consumption and needs three external components (crystal plus two capacitors). The RC-oscillator is completely integrated and can be calibrated if a reference signal is available for a very short time to improve the frequency accuracy. The calibration gets started with the trim_osc direct command. Since no non-volatile memory is available on the chip, the calibration must be done every time after battery replacement. Since the RTC defines the time base of the frequency detection, the selected frequency (frequency of the crystal oscillator or the reference frequency used for calibration of the RC oscillator) should be about one forth of the carrier frequency: FRTC ~ FCAR * 0.25 (EQ 1) Where: FCAR is the carrier frequency and FRTC is the RTC frequency Note: The third option for the RTC is the use of an external clock source, which must be applied directly to the XIN pin (XOUT floating). www.austriamicrosystems.com/AS3930 Revision 1.0 26 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n 8.9.1 Crystal Oscillator Table 22. Characteristics of XTAL Symbol Parameter Conditions Crystal accuracy (initial) Overall accuracy Min Typ Crystal motional resistance Units 120 p.p.m. 60 K Frequency 32.768 kHz Contribution of the oscillator to the frequency error 5 p.p.m 1 s Start-up Time Crystal dependent Duty cycle 45 50 Current consumption 8.9.2 Max 55 1 % A RC-Oscillator Table 23. Characteristics of RCO Symbol Parameter Frequency Calibration time Conditions Min Typ Max Units If no calibration is performed 27 32.768 42 kHz If calibration is performed 31 32.768 34.5 kHz 65 cycles Periods of reference clock Current consumption 200 nA To trim the RC-Oscillator, set the chip select (CS) to high before sending the direct command trim_osc over SDI. Then 65 digital clock cycles of the reference clock (e.g. 32.768 kHz) have to be sent on the clock bus (SCL), as shown in Figure 21. After that the signal on the chip select (CS) has to be pulled down. The calibration is effective after the 65th reference clock edge and it will be stored in a volatile memory. In case the RC-oscillator is switched off or a power-on-reset happens (e.g. battery change) the calibration has to be repeated. Figure 21. RC-Oscillator calibration via SDI 8.9.3 External Clock Source To clock the AS3930 with an external signal the crystal oscillator has to be enabled (R1<1>=1). As shown in the Figure 3 the clock must be applied on the pin XIN while the pin XOUT must stay floating. The RC time constant has to be 100s with a tolerance of 10% (e.g. R=680 k and C=22pF). In the Table 24 the clock characteristics are summarized. Table 24. Characteristics of External Clock Symbol Parameter VI Low level Vh High level www.austriamicrosystems.com/AS3930 Conditions Revision 1.0 Min Typ Max Units 0 0.1* VDD V 0.9*VDD VDD V 27 - 33 AS3930 Data Sheet - D e t a i l e d D e s c r i p t i o n Table 24. Characteristics of External Clock Symbol Parameter Tr Conditions Min Max Units Rise-time 3 s Tf Fall-time 3 s T=1/2RC RC Time constant 110 s 90 Typ 100 Note: In power down mode the external clock has to be set to VDD. www.austriamicrosystems.com/AS3930 Revision 1.0 28 - 33 AS3930 Data Sheet - P a c k a g e D r a w i n g s a n d M a r k i n g s 9 Package Drawings and Markings The product is available in 16 pin TSSOP and QFN 4x4 16 LD packages. Figure 22. Package Diagram 16 pin TSSOP Table 25. Package Dimensions 16 pin TSSOP Symbol Min Typ A A1 0.05 A2 0.85 aaa 0.90 Max Symbol 1.10 E 0.15 L 0.50 0.60 0.70 0.95 a 0 4 8 0.076 Typ 0.19 - 0.30 b1 0.19 0.22 0.25 0.10 Max 6.40 BSC N, P, P1 b bbb Min See Variations Variations: P P1 N AA/AAT 2.90 3.00 D 3.10 1.59 3.2 8 C 0.09 - 0.20 AB-1/ABT-1 4.90 5.00 5.10 3.1 3.0 14 C1 0.09 0.127 0.16 AB/ABT 4.90 5.00 5.10 3.0 3.0 16 AC/ACT 6.40 6.50 6.60 4.2 3.0 20 AD/ADT 7.70 7.80 7.90 5.5 3.2 24 AE/AET 9.60 9.70 9.80 5.5 3.0 28 D E1 e See Variations 4.30 4.40 0.65 BSC www.austriamicrosystems.com/AS3930 4.50 Revision 1.0 29 - 33 AS3930 Data Sheet - P a c k a g e D r a w i n g s a n d M a r k i n g s Note: 1. 2. 3. 4. 5. Die thickness allowable is 0.279 0.0127. Dimensioning and tolerances conform to ASME Y14.5M-1994. Datum plane H located at mold parting line and coincident with lead, where lead exits plastic body at bottom of parting line. Datum A-B and D to BE determined where center line between leads exits plastic body at datum plane H. D & E1 are reference datum and do not include mold flash or protrusions, and are measured at the bottom parting line. Mold lash or protrusions shall not exceed 0.15mm on D and 0.25mm on E per side. 6. Dimension is the length of terminal for soldering to a substrate. 7. Terminal positions are shown for reference only. 8. Formed leads shall be planar with respect to one another within 0.076mm at seating plane. 9. The lead width dimension does not include dambar protrusion. Allowable dambar protrusion shall be 0.07mm total in excess of the lead width dimension at maximum material condition. Dambar cannot be located on the lower radius or the foot. Minimum space between protrusions and an adjacent lead should be 0.07mm for 0.65mm pitch. 10. Section B-B to be determined at 0.10mm to 0.25mm from the lead tip. 11. Dimensions P and P1 are thermally enhanced variations. Values shown are maximum size of exposed pad within lead count and body size. End user should verify available size of exposed pad for specific device application. 12. All dimensions are in millimeters, angle is in degrees. 13. N is the total number of terminals. www.austriamicrosystems.com/AS3930 Revision 1.0 30 - 33 AS3930 Data Sheet - P a c k a g e D r a w i n g s a n d M a r k i n g s Figure 23. Package Diagram QFN 4x4 16 LD 5 6 7 8 4 9 3 10 2 11 #1 12 16 15 14 13 Table 26. Package Dimensions QFN 4x4 16 LD Symbol Min Typ Max Symbol A 0.75 0.85 0.95 e A1 b 0.203 REF 0.25 0.30 L 0.35 Min Typ 0.65 BSC 0.40 0.50 L1 4.00 BSC P 45 BSC E 4.00 BSC aaa 0.15 ccc 0.10 2.30 2.40 2.50 E2 2.30 2.40 2.50 0.60 0.10 D D2 Max Note: 1. Die thickness allowable is 0.279 0.0127. 2. Dimensioning and tolerances conform to ASME Y14.5M-1994. 3. Dimension b applies to metallized terminal and is measured between 0.25mm and 0.30mm from terminal tip. Dimension L1 represents terminal full back from package edge up to 0.1mm is acceptable. 4. Coplanarity applies to the exposed heat slug as well as the terminal. 5. Radius on terminal is optional www.austriamicrosystems.com/AS3930 Revision 1.0 31 - 33 AS3930 Data Sheet - R e v i s i o n H i s t o r y Revision History Table 27. Revision History Revision Date Owner 1.0 07/10/09 rlc www.austriamicrosystems.com/AS3930 Description Revision 1.0 32 - 33 AS3930 Data Sheet - O r d e r i n g I n f o r m a t i o n 10 Ordering Information Table 28. Ordering Information 1 Ordering Code Type Marking Delivery Form Delivery Quantity AS3930-BTST 16 pin TSSOP AS3930 7 inches Tape&Reel 1000 pcs AS3930-BQFT QFN 4x4 16 LD AS3930 7 inches Tape&Reel 1000 pcs 1. Dry Pack Sensitivity Level =3 according to IPC/JEDEC J-STD-033A for full reels. Note: All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect For further information and requests, please contact us mailto:sales@austriamicrosystems.com or find your local distributor at http://www.austriamicrosystems.com/distributor Copyrights Copyright (c) 1997-2009, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered (R). All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. 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Contact Information Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact www.austriamicrosystems.com/AS3930 Revision 1.0 33 - 33