AS3932 3D Low Frequency Wakeup Receiver General Description The AS3932 is a 3-channel low power ASK receiver that is able to generate a wake-up 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 wake-up pattern. The device can operate using one, two, or three active channels. The AS3932 provides a digital RSSI value for each active channel, it supports a programmable data rate. The AS3932 offers a real-time clock (RTC), which is either derived from a crystal oscillator or the internal RC oscillator. The programmable features of AS3932 enable to optimize its settings for achieving a longer distance while retaining a reliable wake-up generation. The sensitivity level of AS3932 can be adjusted in presence of a strong field or in noisy environments. The device is available in 16-pin TSSOP and 16LD QFN (4x4) packages. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of AS3932, 3D Low Frequency Wakeup Receiver are listed below: Figure 1: Added Value of Using AS3932 Benefits Features Enables low power active tags 3-channel ASK wake-up receiver Selectable carrier frequency Carrier frequency range 110 - 150 kHz One, two, or three channel operation 1-D, 2-D, or 3-D wake-up pattern detection Highly resistant to false wake-ups 16-bit programmable wake-up pattern Improved immunity to false wake-ups Supporting doubling of wake-up pattern Allows frequency only detection Wake-up without pattern detection selectable Improved range with best-in-class sensitivity Wake-up sensitivity 100VRMS (typ.) Adjustable range Sensitivity level adjustable Provides tracking of false wake-ups False wake-up counter Ensures wake-up in a noise environment Periodical forced wake-up supported (1s - 2h) Extended battery life Current consumption in 3-channel listening mode 1.7A (typ.) ams Datasheet [v1-83] 2015-Mar-02 Page 1 Document Feedback AS3932 - General Description Benefits Features Flexible clock configuration RTC based 32 kHz XTAL, RC-OSC, or external clock Operates from a 3V battery Operating supply range 2.4V - 3.6V (TA = 25C) Industrial temperature range Operation temperature range -40C to +85C Applications The AS3932 is ideal for: * Active RFID tags, * Real-time location systems, * Operator identification, * Access control, and * Wireless sensors. Figure 2: AS3932 Typical Application Diagram with Crystal Oscillator VCC CL CBAT Page 2 Document Feedback XIN NC XOUT X, Y, and Z Receiving Antennas TX CS XTAL Transmitting Antenna TRANSMITTER VCC LF1P DAT AS3932 WAKE LF2P SCL LF3P SDO LFN SDI VSS GND ams Datasheet [v1-83] 2015-Mar-02 AS3932 - General Description Figure 3: AS3932 Typical Application Diagram with RC Oscillator VCC VCC CS XIN NC CBAT LF1P X, Y, and Z Receiving Antennas TX Transmitting Antenna XOUT TRANSMITTER DAT AS3932 WAKE LF2P SCL LF3P SDO LFN SDI VSS GND Figure 4: AS3932 Typical Application Diagram with Clock from External Source VCC CBAT EXTERNAL CLOCK VCC CS XIN NC R C ams Datasheet [v1-83] 2015-Mar-02 X, Y, and Z Receiving Antennas TX Transmitting Antenna XOUT TRANSMITTER LF1P DAT AS3932 WAKE LF2P SCL LF3P SDO LFN SDI VSS GND Page 3 Document Feedback AS3932 - Pin Assignment Pin Assignment TSSOP Package Figure 5: Pin Assignments 16-pin TSSOP Package CS 1 16 NC SCL 2 15 DAT SDI 3 14 WAKE SDO 4 13 VSS VCC 5 12 XOUT GND 6 11 XIN LF3P 7 10 LFN LF2P 8 9 LF1P AS3932 Pin Description Figure 6: Pin Descriptions 16-pin TSSOP Package Pin Name Pin Number CS 1 SCL 2 SDI 3 SDO 4 Digital output / tristate VCC 5 Supply pad Positive supply voltage GND 6 Supply pad Negative supply voltage Page 4 Document Feedback Pin Type Description Chip select Digital input SDI interface clock SDI data input SDI data output (tristate when CS is low) ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Pin Assignment Pin Name Pin Number LF3P 7 Input antenna channel three LF2P 8 Input antenna channel two LF1P 9 Pin Type Description Input antenna channel one Analog I/O LFN 10 Common ground for antenna one, two and three XIN 11 Crystal oscillator input XOUT 12 Crystal oscillator output VSS 13 WAKE 14 Supply pad Substrate Wake-up output IRQ Digital output DAT 15 NC 16 Data output - Not connected QFN Package GND VCC SDO SDI Figure 7: Pin Assignments 16LD QFN (4x4) Package 16 15 14 13 LF3P 1 12 SCL LF2P 2 11 CS LF1P 3 10 NC LFN 4 9 DAT ams Datasheet [v1-83] 2015-Mar-02 5 6 7 8 XIN XOUT VSS WAKE AS3932 Page 5 Document Feedback AS3932 - Pin Assignment Pin Description Figure 8: Pin Descriptions 16LD QFN (4x4) Package Pin Name Pin Number LF3P 1 Input antenna channel three LF2P 2 Input antenna channel two LF1P 3 Pin Type Description Input antenna channel one Analog I/O LFN 4 Common ground for antenna one, two and three XIN 5 Crystal oscillator input XOUT 6 Crystal oscillator output VSS 7 WAKE 8 Supply pad Substrate Wake-up output IRQ Digital output DAT 9 Data output NC 10 CS 11 SCL 12 SDI 13 SDO 14 Digital output / tristate VCC 15 Supply pad Positive supply voltage GND 16 Supply pad Negative supply voltage - Not connected Chip select Digital input SDI interface clock SDI data input SDI data output (tristate when CS is low) Note(s) and/or Footnote(s): 1. The exposed pad has to be connected to ground. Page 6 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Absolute Maximum Ratings Absolute Maximum Ratings Stresses beyond those listed in Absolute Maximum Ratings 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 Electrical Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Figure 9: Absolute Maximum Ratings Symbol Parameter Min Max Unit Note Electrical Parameters VDD DC supply voltage -0.5 5 V VIN Input pin voltage -0.5 5 V Input current (latch up immunity) -100 100 mA ISOURCE Norm: Jedec 78 Electrostatic Discharge ESD Electrostatic discharge 2 kV Norm: MIL 883 E method 3015 (HBM) Continuous Power Dissipation Pt Total power dissipation 0.07 mW All supplies and outputs Temperature Ranges and Storage Conditions Tstrg Storage temperature Tbody Package body temperature RHNC Relative Humidity non-condensing MSL Moisture Sensitivity Level ams Datasheet [v1-83] 2015-Mar-02 -65 150 5 3 C 260 C 85 % Norm: IPC/JEDEC J-STD-020 The reflow peak soldering temperature (body temperature) is specified according IPC/JEDEC J-STD-020 "Moisture/Reflow Sensitivity Classification for Non-hermetic Solid State Surface Mount Devices". Represents a maximum floor life time of 168h Page 7 Document Feedback AS3932 - Electrical Characteristics Electrical Characteristics Figure 10: Electrical Characteristics Symbol Parameter Conditions Min Typ Max Unit 2.4 3.6 V 0 0 V -40 85 C Operating Conditions VDD Positive supply voltage VSS Negative supply voltage TAMB Ambient temperature 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* VDD V ILEAK Input leakage current 100 nA CMOS Output 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 VDD - 0.4 V Tristate CMOS Output 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 VDD and VSS 100 nA Page 8 Document Feedback VDD - 0.4 V ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Electrical Characteristics Figure 11: Electrical System Specifications Symbol Parameter Conditions Min Typ Max Unit Input Characteristics RIN Input Impedance In case no antenna damper is set (R1<4>=0) 2 M Fmin Minimum Input Frequency 110 kHz Fmax Maximum Input Frequency 150 kHz Power Down Mode 400 nA I1CHRC Current Consumption in standard listening mode with one active channel and RC-oscillator as RTC 2.7 A I2CHRC Current Consumption in standard listening mode with two active channels and RC-oscillator as RTC 4.2 A I3CHRC Current Consumption in standard listening mode with three active channels and RC-oscillator as RTC 5.7 I3CHSCRC Current Consumption in scanning mode with three active channels and RC-oscillator as RTC 2.7 I3CHOORC Current Consumption in ON/ OFF mode with three active channels and RC-oscillator as RTC Current Consumption IPWD I3CHXT Current Consumption in standard listening mode with three active channels and crystal oscillator as RTC ams Datasheet [v1-83] 2015-Mar-02 11% Duty Cycle 1.7 50% Duty Cycle 3.45 8.3 A A A 6.5 8.9 A Page 9 Document Feedback AS3932 - Electrical Characteristics Symbol Parameter IDATA Current Consumption in Preamble detection / Pattern correlation / Data receiving mode (RC-oscillator) Conditions Min With 125 kHz carrier frequency and 1kbpsdata-rate. No load on the output pins. Typ Max Unit 8.3 12 A Input Sensitivity SENS Input Sensitivity on all channels With 125 kHz carrier frequency, chip in default mode, 4 half bits burst + 4 symbols preamble and single preamble detection 100 Vrms 250 s 32.768 kHz 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 Start-up time From RC enable (R1<0> = 0) TRC TCALRC IRC Calibration time Current consumption Page 10 Document Feedback 200 1 s 65 Periods of reference clock nA ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Typical Operating Characteristics Typical Operating Characteristics Figure 12: Sensitivity over Voltage and Temperature 120 95 oC 100 27 oC -40 oC Sensitivity [Vrms] 80 60 40 20 0 2.4 3 3.6 Supply Voltage [V] Figure 13: Sensitivity over RSSI 1000000 VIN = 2.4V 100000 Input Voltage [Vrms] VIN = 1.5V 10000 VIN = 1.0V 1000 100 10 1 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 RSSI [dB] ams Datasheet [v1-83] 2015-Mar-02 Page 11 Document Feedback AS3932 - Typical Operating Characteristics Figure 14: RC-Osc Frequency over Voltage (calibr.) 34.5 RC-OSC Frequency [KHz] 34 33.5 33 32.5 32 31.5 31 2.4 2.6 2.8 3 3.2 3.4 3.6 Supply Voltage [V] Figure 15: RC-Osc Frequency over Temperature (calibr.) 34.5 RC-OSC Frequency [KHz] 34 33.5 33 32.5 32 31.5 31 -36 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 Operating Temperature [oC] Page 12 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description The AS3932 is a three-dimensional low power low-frequency wake-up receiver. The AS3932 is capable to detect the presence of an inductive coupled carrier and extract the envelope of the ON-OFF-Keying (OOK) modulated carrier. If the detected pattern corresponds to the stored one a wake-up signal (IRQ) is risen up. The pattern correlation can be bypassed in which case the wake-up detection is based only on the frequency detection. Detailed Description The AS3932 is made up by three independent receiving channels, one envelop detector, one data correlator, 8 programmable registers with the main logic and a real time clock. The digital logic can be accessed by an SPI. The real time clock can be based on a crystal oscillator or on an internal RC one. If the internal RC oscillator is used, a calibration procedure can be performed to improve its accuracy. Figure 16: Block Diagram of LF Wake-up Receiver AS3932 AS3932 Wake-up IRQ Data LF1P Channel Amplifier 1 SCL RSSI Main Logic SPI SDI SDO Freq. OK LF2P Channel Amplifier 2 Envelope Detector / Data Slicer Channel Selector Data CS Correlator RSSI Freq. OK DAT Data LF3P Channel Amplifier 3 RSSI Freq. OK I/V Bias Xtal RTC GND Xin RC RTC LFN VCC ams Datasheet [v1-83] 2015-Mar-02 Xout Page 13 Document Feedback AS3932 - Detailed Description AS3932 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). * One, two, or three LC resonators according to the number of used channels. 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 2 and Figure 3. Operating Modes Power Down Mode In Power Down Mode AS3932 is completely switched OFF. The typical current consumption is 400 nA. Listening Mode In listening mode only the active channel amplifiers 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. If the three dimensional detection is not required it is possible to deactivate one or more channels. In case only two channels are required the deactivated channel must be the number two, while if only one channel detection is needed the active channel must be the number one. Inside this mode it is possible to distinguish the following three sub modes: Standard Listening Mode. All channels are active at the same time. Scanning Mode (Low Power Mode 1). All used channels are active, but only one per time slot, where the time slot T is defined as 1ms. Thus, if all three channels are active the procedure is as follows (see Figure 17): for the first millisecond only channel one is active while channel two and three are powered down; for the next millisecond only channel three is active while channel one and two are powered down; finally, channel two is active while the other two are deactivated. This channel rotation goes on until the presence of the carrier is detected by any of the channels; then immediately all three channels will become active at the same time. Now AS3932 can perform a simultaneous multidirectional evaluation (on all three channels) of the field and evaluate which channel has the strongest RSSI. The channel with the highest RSSI will be put through to the demodulator. Page 14 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description In this way it is possible to perform multidirectional monitoring of the field with a current consumption of a single channel, keeping the sensitivity as good as if all channels are active at the same time. Figure 17: Scanning Mode Channel 1 Channel 3 time Channel 2 time Presence of carrier time t0 ams Datasheet [v1-83] 2015-Mar-02 t0+T t0+2T t0+3 T t0+4T t0+5T t1 time Page 15 Document Feedback AS3932 - Detailed Description ON/OFF Mode (Low Power Mode 2). All active channels are ON at the same time but not for the whole time (time slot T is defined as 1ms). An ON-OFF duty-ratio is defined. This duty ratio is programmable see R4<7:6>. Figure 18: ON/OFF Mode Channel 1 Channel 2 time Channel 3 time Presence of carrier time t0 t0+T 2 *t 0 2 *t 0 + T 3 *t 0 time For each of these sub modes it is possible to enable a further feature called Artificial Wake-up. The Artificial Wake-up is a counter based on the used RTC. Three bits define a time window see R8<2:0>. If no activity is seen within this time window the chip will produce an interrupt on the WAKE pin that lasts 128s. With this interrupt the microcontroller (C) can get feedback on the surrounding environment (e.g. read the false wake-up register R13<7:0>) and/or take actions in order to change the setup. Preamble Detection / Pattern Correlation The preamble detection and pattern correlation are only considered for the wake-up when 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, see Figure 37) 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 (on all active channels) is terminated and no IRQ is produced. Page 16 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description Data Receiving After a successful wake-up the chip enters the data receiving mode. In this mode the chip can be retained a normal OOK receiver. The received data are streamed out on the pin DAT. It is possible to put the chip back to listening mode either with a direct command (CLEAR_WAKE (see Figure 25)) or by using the timeout feature. This feature automatically sets the chip back to listening mode after a certain time R7<7:5>. System and Block Specification Register Table Figure 19: Register Table 7 R0 n.a. R1 ABS_HY R2 S_ABSH R3 HY_20m R4 6 AGC_TLI M 5 4 3 2 1 0 ON_OFF MUX_123 EN_A2 EN_A3 EN_A1 PWD AGC_UD ATT_ON EN_PAT2 EN_WPAT EN_RTC W_PAT_T<1:0> HY_POS T_OFF<1:0> Reserved FS_SLC<2:0> FS_ENV<2:0> R_VAL<1:0> GR<3:0> R5 TS2<7:0> R6 TS1<7:0> R7 T_OUT<2:0> R8 R9 S_WU1<1:0> 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 ams Datasheet [v1-83] 2015-Mar-02 F_WAKE Page 17 Document Feedback AS3932 - Detailed Description Register Table Description and Default Values Figure 20: Default Values of Registers Register Name Type Default Value R0<5> ON_OFF R/W 0 ON/OFF operation mode. (Duty-cycle defined in the register R4<7:6> R0<4> MUX_123 R/W 0 Scan mode enable R0<3> EN_A2 R/W 1 Channel 2 enable R0<2> EN_A3 R/W 1 Channel 3 enable R0<1> EN_A1 R/W 1 Channel 1 enable R0<0> PWD R/W 0 Power down R1<7> ABS_HY R/W 0 Data slicer absolute reference R1<6> AGC_TLIM R/W 0 AGC acting only on the first carrier burst R1<5> AGC_UD R/W 1 AGC operating in both direction (up-down) R1<4> ATT_ON R/W 0 Antenna damper enable R1<2> EN_PAT2 R/W 0 Double wake-up pattern correlation R1<1> EN_WPAT R/W 1 Data correlation enable R1<0> EN_RTC R/W 1 Crystal oscillator enable R2<7> S_ABSH R/W 0 Data slicer threshold reduction R2<6:5> W_PAT R/W 00 Pattern correlation tolerance (see Figure 38) R2<4:2> Reserved 000 Reserved R2<1:0> S_WU1 R/W 00 Tolerance setting for the stage wake-up (see Figure 32) R3<7> HY_20m R/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 R/W 0 Data slicer hysteresis on both edges (HY_POS = 0 hysteresis on both edges; HY_POS = 1 hysteresis only on positive edges) R3<5:3> FS_SCL R/W 100 Data slicer time constant (see Figure 36) R3<2:0> FS_ENV R/W 000 Envelop detector time constant (see Figure 35) Page 18 Document Feedback Description ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description Register Name Type Default Value Description OFF time in ON/OFF operation mode R4<7:6> T_OFF R/W 00 T_OFF=00 1ms T_OFF=01 2ms T_OFF=10 4ms T_OFF=11 8ms R4<5:4> D_RES R/W 01 Antenna damping resistor (see Figure 34) R4<3:0> GR R/W 0000 R5<7:0> TS2 R/W 01101001 2nd Byte of wake-up pattern R6<7:0> TS1 R/W 10010110 1st Byte of wake-up pattern R7<7:5> T_OUT R/W 000 R7<4:0> T_HBIT R/W 01011 Gain reduction (see Figure 33) Automatic time-out (see Figure 39) Bit rate definition (see Figure 37) Artificial wake-up R8<2:0> T_AUTO R/W 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 R9<6:0> Reserved R10<4:0> RSSI1 R RSSI channel 1 R11<4:0> RSSI2 R RSSI channel 2 R12<4:0> RSSI3 R RSSI channel 3 R13<7:0> F_WAK R False wake-up register ams Datasheet [v1-83] 2015-Mar-02 000000 T_AUTO=000 Reserved Page 19 Document Feedback AS3932 - Detailed Description Serial Data Interface (SDI) This 4-wires interface is used by the Microcontroller (C) to program the AS3932. The maximum clock frequency of the SDI is 2MHz. Figure 21: 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(s): 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 Figure 22 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). Figure 22: SDI Command Structure Register Address / Direct Command Mode B15 B14 B13 B12 B11 B10 B9 Register Data B8 B7 B6 B5 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 Figure 23. Page 20 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description Figure 23: 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 6 bits (B13 to B8) define the register address which has to be written respectively read, as shown in Figure 24. Figure 24: 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 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. ams Datasheet [v1-83] 2015-Mar-02 Page 21 Document Feedback AS3932 - Detailed Description If a direct command is sent (B15-B14=11) the bits from B13 to B8 defines the direct command while the last 8 bits are omitted. The Figure 25 shows all possible direct commands: Figure 25: 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 46). * clear_false: resets the false wake-up register (R13<7:0>=00). * preset_default: sets all register in the default mode, as shown in Figure 20. Writing of Data to Addressable Registers (WRITE Mode). The SDI is sampled at the falling edge of SCLK (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. Page 22 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description Figure 26: Writing of a Single Byte (falling edge sampling) CS SCLK SDI X 0 0 Two leading Zeros indicate WRITE Mode A5 A4 A3 SCLK rising edge Data is transfered from C A2 A1 A0 D7 D6 D5 D4 D3 SCLK falling edge Data is sampled D2 D1 X D0 CS falling edge signals end of WRITE Mode Data is moved to Address A5-A0 Figure 27: Writing of Register Data with Auto-incrementing Address CS SCLK SDI A A A A A D D D D D D D D D D D D D D D D D D X 0 0 A 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 ams Datasheet [v1-83] 2015-Mar-02 Data is moved to Address <A5-A0 > Data is moved to Address <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 Address <A5-A0 > + (n-1) Data is moved to Address <A5-A0 > + n X CS falling edge signals end of WRITE Mode Page 23 Document Feedback AS3932 - Detailed Description 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 28: Reading of Single Register Byte CS SCLK SDI X 0 1 A5 SDO A4 A3 A2 A1 X D7 SCLK rising edge Data is transfered from C 01 pattern indicates READ Mode X A0 SCLK falling edge Data is sampled D6 D5 SCLK rising edge Data is moved from Address <A5-A0> D4 D3 D2 D1 D0 X CS falling edge signals end of READ Mode SCLK falling edge Data is transfered to C Figure 29: Send Direct COMMAND Byte CS SCLK SDI X 1 1 Two leading ONE indicate COMMAND Mode Page 24 Document Feedback C5 C4 C3 SCLK rising edge Data is transfered from C C2 C1 SCLK falling edge Data is sampled C0 X CS falling edge signals the end of COMMAND Mode ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description SDI Timing Figure 30: SDI Timing Parameters Symbol Parameter Conditions Min Typ Max Units TCSCLK Time CS to Sampling Data 500 ns TDCLK Time Data to Sampling Data 300 ns THCL SCLK High Time 200 ns TCLK SCLK period 500 ns TCLKCS Time Sampling Data to CS down 500 ns TCST CS Toggling time 500 ns Figure 31: SDI Timing Diagram TCST CS SPI SCLK SCL t TCSCLK TDCLK t THCL TCLKCS t TCLK ams Datasheet [v1-83] 2015-Mar-02 Page 25 Document Feedback AS3932 - Detailed Description Channel Amplifier and Frequency Detector Each of the 3 channels consists of a variable gain amplifier, 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. It is possible to enable/disable individual channels, in case not all three channels are needed. This enables to reduce the current consumption by 1.5 A (typ.) per channel. 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 Figure 32). Figure 32: Tolerance Settings for Wake-up 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 available for all 3 channels at the same time and it is stored in 3 registers (R10<4:0>, R11<4:0>, R12<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. Page 26 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description 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. 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 Figure 33. In this way it is possible to reduce the false frequency detection. Figure 33: Bit Setting of Gain Reduction ams Datasheet [v1-83] 2015-Mar-02 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 Page 27 Document Feedback AS3932 - Detailed Description 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). Figure 34 shows the bit setup. Figure 34: 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 Channel Selector / Demodulator / Data Slicer When at least one of three gain channel enters initial wake-up state the channel selector makes a decision which gain channel to connect to the envelope detector. If only one channel is in wake-up state the selection is obvious. If more than one channel enters wake-up state in 256s following the first active channel the channel with highest RSSI value is selected. The output signal (amplified LF carrier) of selected channel is connected to the input of the demodulator. The performance of the demodulator can be optimized according to bit rate and preamble length as described in Figure 35 and Figure 36. Page 28 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description Figure 35: Bit Setup for the Envelop Detector for Different Symbol Rate 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 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. Figure 36 gives a correlation between data slicer setup and minimum required preamble length. ams Datasheet [v1-83] 2015-Mar-02 Page 29 Document Feedback AS3932 - Detailed Description Figure 36: Bit Setup for the 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(s): 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>). Page 30 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description 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 Figure 37) and if no preamble is detected the chip is set back to listening mode and the false wake-up 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 Figure 37 as function of the Real Time Clock (RTC) periods. Figure 37: 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 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 ams Datasheet [v1-83] 2015-Mar-02 Page 31 Document Feedback AS3932 - Detailed Description 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) 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 Figure 37). 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 Figure 38. Page 32 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description Figure 38: 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 matches the wake-up, interrupt is displayed on the WAKE output. If the pattern detection fails, the internal wake-up (on all active channels) is terminated with no signal sent to MCU and the false wake-up register will be incremented (R13<7:0>). Wake-up Protocol - Carrier Frequency 125 kHz The wake-up state is terminated with the direct command `clear_wake' Figure 25. 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 Figure 39. Figure 39: Timeout Setup ams Datasheet [v1-83] 2015-Mar-02 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 Page 33 Document Feedback AS3932 - Detailed Description Without Pattern Detection Figure 40: Wake-up Protocol Overview without Pattern Detection (only carrier frequency detection) Carrier Burst Data Carrier Burst > 550 us DAT WAKE Clear_wake In case the data correlation is disabled (R1<1>=0) the AS3932 wakes up upon detection of the carrier frequency only as shown in Figure 40. In order to ensure that AS3932 wakes up the carrier burst has to last longer than 550 s. To set AS3932 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, AS3932 is 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. Page 34 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description Single Pattern Detection The Figure 41 shows the wake-up 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 Figure 37). 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 Figure 42. In case the carrier burst is too long the internal wake-up will be set back to low and the false wake-up 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 Figure 37) and the wake-up 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 wake-up pattern is correct, the signal on the WAKE pin goes high one bit after the end of the pattern and the data transmission can get started. To set the chip back to listening mode the direct command clear_wake, as well as the time out option ( R7<7:5>) can be used. Figure 41: Wake-up Protocol Overview with Single Pattern Detection Carrier Burst 1 bit Preamble Carrier Burst > 550 s Carrier Burst < 16 bit duration Preamble Pattern Data 1 bit Preamble Preamble > 4 bit duration Preamble + Pattern < 40 bit duration DAT WAKE Clear_wake ams Datasheet [v1-83] 2015-Mar-02 Page 35 Document Feedback AS3932 - Detailed Description Figure 42: Preamble Requirements in Standard Mode, Scanning Mode and ON/OFF Mode Bit Rate (bits/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 1212 13.20 13.20 1170 13.67 13.67 1128 14.18 14.18 1092 14.65 14.65 Page 36 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description Bit Rate (bits/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) 1056 15.15 15.15 1024 15.62 15.62 False Wake-up Register The wake-up strategy in the AS3932 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 wake-up 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 wake-up register). Thus, the microcontroller can periodically look at the false wake-up 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 AS3932 temporarily to power down etc.), as shown in the Figure 43. The false wake-up counter is a useful tool to quickly adapt the system to any changes in the noise environment and thus avoid false wake-up events. Most wake-up receivers have to deal with environments that can rapidly change. By periodically monitoring the number of false wake-up 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 AS3932. ams Datasheet [v1-83] 2015-Mar-02 Page 37 Document Feedback AS3932 - Detailed Description Figure 43: Concept of the False Wake-up Register Together With the System Wakeup Level 1 Frequency Detector Wakeup Level 2 Pattern Correlator WAKE Unsuccessful pattern correlation CHANGE SETUP TO MINIMIZE THE FALSE WAKEUP EVENTS Register Setup False wakeup register READ FALSE WAKEUP REGISTER Microcontroller 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 oscillator has higher precision of the frequency with 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 the calibration must be done every time after the RCO is turned OFF. The RCO is turned OFF when the chip is in power down mode, a POR happened, or the crystal oscillator is enabled. Page 38 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description 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: (EQ1) F RTC F CAR 0.25 Where: FCAR is the carrier frequency and F RTC is the RTC frequency. 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). Crystal Oscillator Figure 44: Characteristics of XTAL Symbol Parameter Conditions Crystal accuracy (initial) Overall accuracy Min Max 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 Duty cycle Current consumption ams Datasheet [v1-83] 2015-Mar-02 Typ Crystal dependent 45 50 1 55 % A Page 39 Document Feedback AS3932 - Detailed Description RC-Oscillator Figure 45: Characteristics of RCO Symbol Parameter Conditions Min Max Typ Units If no calibration is performed 27 32.768 42 kHz If calibration is performed 31 32.768 34.5 kHz 65 cycles Frequency Calibration time Current consumption Periods of reference clock 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 (SCLK), as shown in Figure 46. 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 46: RC-Oscillator Calibration via SDI Page 40 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Detailed Description External Clock Source To clock the AS3932 with an external signal the crystal oscillator has to be enabled (R1<0>=1). As shown in the Figure 4 the clock must be applied on the pin XIN while the pin XOUT must stay floating. The RC time constant has to be 15s with a tolerance of 10% (e.g. R=680 k and C=22pF). In the Figure 47 the clock characteristics are summarized. Figure 47: Characteristics of External Clock Symbol Parameter VI Low level Vh High level Tr Conditions Min Max Units 0 0.1 * VDD V 0.9 * VDD VDD V Rise-time 3 s Tf Fall-time 3 s T = RC RC Time constant 16.5 s 13.5 Typ 15 Note(s): In power down mode the external clock has to be set to VDD. Channel Selection in Scanning Mode and ON/OFF Mode In case only 2 channels are active and one of the Low Power modes is enabled, then the channels 1 and 3 have to be active. If the chip works in ON-OFF mode and only one channel is active then the active channel has to be the channel 1. Both Low Power modes are not allowed to be enabled at the same time. ams Datasheet [v1-83] 2015-Mar-02 Page 41 Document Feedback AS3932 - Package Drawings & Mark ings Package Drawings & Markings The product is available in a 16-pin TSSOP package. Figure 48: Drawings and Dimensions (TSSOP) AS3932 @ YYWWMZZ Symbol Min Nom Max Symbol Min Nom Max A A1 A2 b c D E E1 e L L1 0.05 0.80 0.19 0.09 4.90 4.30 0.45 - 1.00 5.00 6.40BSC 4.40 0.65BSC 0.60 1.00REF 1.20 0.15 1.05 0.30 0.20 5.10 4.50 0.75 - R R1 S 1 2 3 aaa bbb ccc ddd N 0.09 0.09 0.20 0 - 12REF 12REF 0.10 0.10 0.05 0.20 16 8 - Green RoHS Note(s) and/or Footnote(s): 1. Dimensions and tolerancing conform to ASME Y14.5M-1994. 2. All dimensions are in millimeters. Angles are in degrees. Figure 49: Marking: YYWWMZZ YY WW M ZZ @ Year (i.e. 10 for 2010) Manufacturing Week Assembly plant identifier Assembly traceability code Sublot identifier Page 42 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Package Drawings & Markings The product is available in a 16LD QFN (4x4) package. Figure 50: Drawings and Dimensions (QFN) AS3932 YYWWXZZ @ RoHS Green Note(s) and/or Footnote(s): 1. Dimensioning and tolerancing conform to ASME Y14.5M-1994. 2. All dimensions are in millimeters. Angles are in degrees. 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 0.15mm is acceptable. 4. Coplanarity applies to the exposed heat slug as well as the terminal. 5. Radius on terminal is optional. 6. N is the total number of terminals. Figure 51: Marking: YYWWXZZ YY WW X ZZ @ Year (i.e. 10 for 2010) Manufacturing Week Assembly plant identifier Assembly traceability code Sublot identifier ams Datasheet [v1-83] 2015-Mar-02 Page 43 Document Feedback AS3932 - Ordering & Contact Information Ordering & Contact Information The devices are available as the standard products shown in Figure 52. Figure 52: Ordering Information Ordering Code Type Marking Delivery Form(1) Delivery Quantity AS3932-BTST 16-pin TSSOP AS3932 7 inches Tape & Reel 1000 pcs AS3932-BQFT 16LD QFN (4x4) AS3932 7 inches Tape & Reel 1000 pcs Note(s) and/or Footnote(s): 1. Dry Pack Sensitivity Level =3 according to IPC/JEDEC J-STD-033A for full reels. Buy our products or get free samples online at: www.ams.com/ICdirect Technical Support is available at: www.ams.com/Technical-Support Provide feedback about this document at: www.ams.com/Document-Feedback For further information and requests, e-mail us at: ams_sales@ams.com For sales offices, distributors and representatives, please visit: www.ams.com/contact Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten Austria, Europe Tel: +43 (0) 3136 500 0 Website: www.ams.com Page 44 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - RoHS Compliant & ams Green Statement RoHS Compliant & ams Green Statement RoHS: The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes. ams Green (RoHS compliant and no Sb/Br): ams Green defines that in addition to RoHS compliance, our products are free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material). Important Information: The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. ams Datasheet [v1-83] 2015-Mar-02 Page 45 Document Feedback AS3932 - Copyrights & Disclaimer Copyrights & Disclaimer Copyright ams AG, Tobelbader Strasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered. 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. Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams 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 ams AG for current information. This product is intended for use in 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 ams AG for each application. This product is provided by ams AG "AS IS" and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. ams AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. No obligation or liability to recipient or any third party shall arise or flow out of ams AG rendering of technical or other services. Page 46 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Document Status Document Status Document Status Product Preview Preliminary Datasheet Datasheet Datasheet (discontinued) ams Datasheet [v1-83] 2015-Mar-02 Product Status Definition Pre-Development Information in this datasheet is based on product ideas in the planning phase of development. All specifications are design goals without any warranty and are subject to change without notice Pre-Production Information in this datasheet is based on products in the design, validation or qualification phase of development. The performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice Production Information in this datasheet is based on products in ramp-up to full production or full production which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade Discontinued Information in this datasheet is based on products which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade, but these products have been superseded and should not be used for new designs Page 47 Document Feedback AS3932 - Revision Information Revision Information Changes from 1.7 (2013-Jun-18) to current revision 1-83 (2015-Mar-02) Page 1.7 (2013-Jun-18) to 1-82 (2014-Nov-05) Content was converted to latest ams design Added benefits to Key Features 1 Added TRC (start-up time) parameter in Figure 11 9 Updated text under Detailed Description section 13 Updated Figure 30 25 1-82 (2014-Nov-05) to 1-83 (2015-Mar-02) Updated Figure 50 (QFN (4x4) package) 43 Note(s) and/or Footnote(s): 1. Page and figure numbers for the previous version may differ from page and figure numbers in the current revision. 2. Correction of typographical errors is not explicitly mentioned. Page 48 Document Feedback ams Datasheet [v1-83] 2015-Mar-02 AS3932 - Content Guide Content Guide ams Datasheet [v1-83] 2015-Mar-02 1 1 2 General Description Key Benefits & Features Applications 4 4 4 5 6 Pin Assignment TSSOP Package Pin Description QFN Package Pin Description 7 8 11 Absolute Maximum Ratings Electrical Characteristics Typical Operating Characteristics 13 14 14 14 16 17 17 17 18 20 25 26 26 28 28 31 33 34 35 37 38 39 40 41 41 Detailed Description Operating Modes Power Down Mode Listening Mode Preamble Detection / Pattern Correlation Data Receiving System and Block Specification Register Table Register Table Description and Default Values Serial Data Interface (SDI) SDI Timing Channel Amplifier and Frequency Detector Frequency Detector / AGC Antenna Damper Channel Selector / Demodulator / Data Slicer Correlator Wake-up Protocol - Carrier Frequency 125 kHz Without Pattern Detection Single Pattern Detection False Wake-up Register Real Time Clock (RTC) Crystal Oscillator RC-Oscillator External Clock Source Channel Selection in Scanning Mode and ON/OFF Mode 42 44 45 46 47 48 Package Drawings & Markings Ordering & Contact Information RoHS Compliant & ams Green Statement Copyrights & Disclaimer Document Status Revision Information Page 49 Document Feedback Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: ams: AS3932-BQFT AS3940-DB