Digital Step Attenuator 50 DC-2400 MHz 31.5 dB, 0.5 dB Step, 6 Bit, Parallel Control Interface Dual Supply Voltage Product Features * Low Insertion Loss * High IP3, +52 dBm Typ * Excellent return loss, 20 dB Typ * Excellent accuracy, 0.1 dB Typ * Fast switching control frequency, 1 MHz typ. * Dual Supply Voltage: VDD=+3V, VSS=-3V * Control inputs buffered by Schmitt Triggers * Rigid unibody case * Protected by US patent 6,790,049 ZX76-31R5-PN Connectors SMA Typical Applications CASE STYLE: HK1149 Order P/N Price ZX76-31R5-PN-S $79.95 ea. Qty. (1-9) * Lab * Instrumentation * Test equipment General Description The ZX76-31R5-PN is a 50 RF digital step attenuator that offers an attenuation range up to 31.5 dB in 0.5 dB steps. The control is a 6-bit parallel interface. The model operates on a dual supply voltage: VDD=+3V, VSS=-3V. See application note AN-70-004 for 5V supply voltage. The ZX76-31R5-PN is produced using a unique case package for ruggedness and operation in tough environments. Simplified Schematic RF Input Parallel Control Latch Enable 16dB 8dB 4dB 2dB 1dB 0.5dB RF Out Internal Control Logic Interface Mini-Circuits (R) REV. Rev. 1 OR M101068 M00000 ZX76-31R5-PN ZX76-31R5-PN EDR-7464/2 Distribution Centers NORTH AMERICA 800-654-7949 * 417-335-5935 * Fax 417-335-5945 * EUROPE 44-1252-832600 * Fax 44-1252-837010 050727 051228 Page page11of of 10 10 Mini-Circuits ISO 9001 & ISO 14001 Certified INTERNET http://www.minicircuits.com P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 ZX76-31R5-PN Digital Step Attenuator RF Electrical Specifications, DC-2400 MHz, TAMB=25C, VDD=+3V, VSS=-3V Parameter Accuracy @ 0.5 dB Attenuation Setting Accuracy @ 1 dB Attenuation Setting Accuracy @ 2 dB Attenuation Setting Accuracy @ 4 dB Attenuation Setting Freq. Range (GHz) Min. Typ. DC-1 -- 1-2.4 -- DC-1 Max. Units 0.03 0.1 dB 0.05 0.15 dB -- 0.02 0.1 dB 1-2.4 -- 0.05 0.15 dB DC-1 -- 0.05 0.15 dB 1-2.4 -- 0.15 0.25 dB DC-1 -- 0.07 0.2 dB 1-2.4 -- 0.15 0.25 dB DC-1 -- 0.03 0.2 dB 1-2.4 -- 0.15 0.3 dB DC-1 -- 0.1 0.3 dB 1-2.4 -- 0.15 0.5 dB DC-1 -- 1.5 2.2 dB 1-2.4 -- 2.0 3.0 dB IP3 Input* (at Min. and Max. Attenuation) DC-2.4 -- +52 -- dBm Input Power @ 0.2dB Compression* (at Min. and Max. Attenuation) DC-2.4 -- +24 -- dBm DC-1 -- 1.2 1.5 -- 1-2.4 -- 1.2 1.5 -- Accuracy @ 8 dB Attenuation Setting Accuracy @ 16 dB Attenuation Setting Insertion Loss @ all attenuator set to 0dB VSWR * IP3 and 1dB compression degrade below 1 MHz DC Electrical Specifications Parameter Min. Typ. Max. Units VDD, Supply Voltage 2.7 3 3.3 V VSS, Supply Voltage -3.3 -3 -2.7 V IDD, Supply Current -- -- 3 mA ISS, Supply Current -- -- 100 A Control Input Voltage Low 0 -- 0.3xVDD V Control Input Voltage High 0.7xVDD -- VDD V -- -- 400 A Control Current Switching Specifications Min. Typ. Max. Units Switching Speed, 50% Control to 0.5dB of Attenuation Value Parameter -- 1.0 -- Sec Switching Control Frequency -- 1.0 -- MHz Absolute Maximum Ratings Parameter Ratings Operating Temperature -40C to 85C Storage Temperature -55C to 100C VDD, Supply Voltage -0.3V Min., 4V Max. VSS, Supply Voltage -4V Min., 0.3V Max. Voltage on Control Input -0.3V Min., 5V Max. ESD, HBM 500V ESD, MM 100V Input Power +24dBm Mini-Circuits (R) INTERNET http://www.minicircuits.com P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 Distribution Centers NORTH AMERICA 800-654-7949 * 417-335-5935 * Fax 417-335-5945 * EUROPE 44-1252-832600 * Fax 44-1252-837010 Mini-Circuits ISO 9001 & ISO 14001 Certified Page 2 of 10 TOP VIEW J3 Digital Step Attenuator P1 P2 Pin Description J2 ZX76-31R5-PN RF IN RF OUT GND Pin +VDD Configuration Function Pin Number LE J1-1 Latch Enable Input C1 J1-2 Control for attenuation bit, 1 dB C0.5 J1-3 Control for attenuation bit, 0.5 dB N/C J1-4 Not Connected C16 J1-5 Control for attenuation bit, 16 dB GND J1-6 Ground connection GND J1-7 Ground connection C4 J1-8 Control for attenuation bit, 4 dB C8 J1-9 Control for attenuation bit, 8 dB C2 J1-10 Control for attenuation bit, 2 dB Description RF in port (Note 1) J3 RF out port (Note 1) GND P1 Ground connection 3 20 4 VDD P2 Positive Supply Voltage N/C GND P3 Ground connection N/C VSS P4 Negative Supply Voltage SIDE VIEW RF IN J1 RF OUT GND GND +VDD -VSS J3 J2 P3 P4 J1 N/C J2 P1 P2 SIDE VIEW J2 1 2 3 4 5 6 7 8 9 10 RF in RF out TOP VIEW J2 J3 19 18 2 * 25 pin D-type connector, other pins are N/C. Note 1: Both RF ports must be held at 0VDC or DC blocked with an external series capacitor. J1 J3 J1-10 J1-1 N/C W1P1 W1P2* J1 J4 J1 J1-1 J1-10 Cable Pin Description J1-Pin Number J4-Pin Number J1-1 J4-8 LE Latch Enable Input WHITE J1-2 J4-3 C1 Control for attenuation bit, 1 dB YELLOW J1-3 J4-2 C0.5 Control for attenuation bit, 0.5 dB GREEN Function Description Wire Color J1-5 J4-7 C16 Control for attenuation bit, 16 dB BLUE J1-6 J4-20 GND Ground connection BLACK J1-8 J4-5 C4 Control for attenuation bit, 4 dB ORANGE J1-9 J4-6 C8 Control for attenuation bit, 8 dB BROWN J1-10 J4-4 C2 Control for attenuation bit, 2 dB RED Note: Other pins not connected. Cable shield connected to case ground. Mini-Circuits (R) INTERNET http://www.minicircuits.com P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 Distribution Centers NORTH AMERICA 800-654-7949 * 417-335-5935 * Fax 417-335-5945 * EUROPE 44-1252-832600 * Fax 44-1252-837010 Mini-Circuits ISO 9001 & ISO 14001 Certified Page 3 of 10 ZX76-31R5-PN Digital Step Attenuator Typical Performance Curves ATTENUATION (0.5 dB) INSERTION LOSS (Ref) 5.0 0.8 -40C +25C +85C 4.0 3.5 3.0 2.5 2.0 1.5 1.0 0.0 0 500 1000 1500 2000 2500 3000 3500 0.5 0.4 0.3 0.2 0.0 4000 0 500 1000 1500 2000 2500 3000 FREQUENCY (MHz) FREQUENCY (MHz) ATTENUATION (1 dB) ATTENUATION (2 dB) 1.4 3500 4000 3500 4000 3500 4000 2.6 -40C +25C +85C -40C +25C +85C 2.4 ATTENUATION (dB) 1.2 ATTENUATION (dB) 0.6 0.1 0.5 1.0 0.8 0.6 0.4 0.2 2.2 2.0 1.8 1.6 1.4 1.2 0.0 1.0 0 500 1000 1500 2000 2500 3000 3500 4000 0 500 1000 1500 2000 2500 3000 FREQUENCY (MHz) FREQUENCY (MHz) ATTENUATION (4 dB) ATTENUATION (8 dB) 4.6 8.6 -40C +25C +85C -40C +25C +85C 8.4 ATTENUATION (dB) 4.4 ATTENUATION (dB) -40C +25C +85C 0.7 ATTENUATION (dB) INSERTION LOSS (dB) 4.5 4.2 4.0 3.8 3.6 3.4 3.2 8.2 8.0 7.8 7.6 7.4 7.2 3.0 7.0 0 500 1000 1500 2000 2500 3000 3500 4000 0 500 FREQUENCY (MHz) 1000 1500 2000 2500 3000 FREQUENCY (MHz) Mini-Circuits (R) INTERNET http://www.minicircuits.com P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 Distribution Centers NORTH AMERICA 800-654-7949 * 417-335-5935 * Fax 417-335-5945 * EUROPE 44-1252-832600 * Fax 44-1252-837010 Mini-Circuits ISO 9001 & ISO 14001 Certified Page 4 of 10 ZX76-31R5-PN Digital Step Attenuator Typical Performance Curves ATTENUATION (16 dB) ATTENUATION (31.5 dB) 34 17.0 -40C +25C +85C 16.0 15.5 15.0 14.5 28 26 24 20 0 500 1000 1500 2000 2500 3000 3500 0 4000 500 1000 1500 2000 2500 3000 FREQUENCY (MHz) FREQUENCY (MHz) RETURN LOSS IN (Ref) RETURN LOSS OUT (Ref) 30 3500 4000 30 -40C +25C +85C -40C +25C +85C 25 RETURN LOSS (dB) 25 RETURN LOSS (dB) 30 22 14.0 20 15 10 5 20 15 10 5 0 0 0 70 500 1000 1500 2000 2500 3000 3500 4000 0 500 1000 1500 2000 2500 3000 3500 FREQUENCY (MHz) FREQUENCY (MHz) RETURN LOSS IN (Major Atten. Steps) @ +25oC RETURN LOSS OUT (Major Atten. Steps) @ +25oC 70 0 dB 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB 50 40 30 4000 0 dB 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB 60 RETURN LOSS (dB) 60 RETURN LOSS (dB) -40C +25C +85C 32 ATTENUATION (dB) ATTENUATION (dB) 16.5 50 40 30 20 20 10 10 0 500 1000 1500 2000 2500 3000 3500 4000 0 500 Mini-Circuits (R) 1000 1500 2000 2500 3000 3500 4000 FREQUENCY (MHz) FREQUENCY (MHz) INTERNET http://www.minicircuits.com P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 Distribution Centers NORTH AMERICA 800-654-7949 * 417-335-5935 * Fax 417-335-5945 * EUROPE 44-1252-832600 * Fax 44-1252-837010 Mini-Circuits ISO 9001 & ISO 14001 Certified Page 5 of 10 ZX76-31R5-PN Digital Step Attenuator Typical Performance Curves COMPRESSION @ INPUT POWER=+24dBm (Major Atten. Steps) @ +25oC IP3 (Major Atten. Steps) @ +25oC 80 0.2 IP3 (dBm) 70 65 60 55 50 45 0.1 COMPRESSION (dB) 0 dB 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB 75 40 -0.2 -0.3 0 dB 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB -0.4 -0.5 -0.6 -0.7 35 -0.8 400 800 1200 1600 2000 2400 0 400 1200 1600 2000 IP3 (Major Atten. Steps) @ -40oC COMPRESSION @ INPUT POWER=+24dBm (Major Atten. Steps) @ -40oC 0 dB 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB 75 70 65 60 55 50 45 0.2 0.1 40 0.0 -0.1 -0.2 -0.3 0 dB 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB -0.4 -0.5 -0.6 -0.7 35 -0.8 0 400 800 1200 1600 2000 2400 0 400 FREQUENCY (MHz) 800 1200 1600 2000 0 dB 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB 75 70 65 60 55 50 45 40 COMPRESSION @ INPUT POWER=+24dBm (Major Atten. Steps) @ +85oC 0.20 0.10 COMPRESSION (dB) 80 0.00 -0.10 -0.20 -0.30 0 dB 0.5 dB 1 dB 2 dB 4 dB 8 dB 16 dB 31.5 dB -0.40 -0.50 -0.60 -0.70 35 -0.80 400 800 1200 2400 FREQUENCY (MHz) IP3 (Major Atten. Steps) @ +85oC 0 2400 FREQUENCY (MHz) 80 IP3 (dBm) 800 FREQUENCY (MHz) COMPRESSION (dB) 0 IP3 (dBm) 0.0 -0.1 1600 2000 2400 0 FREQUENCY (MHz) 400 800 1200 1600 2000 2400 FREQUENCY (MHz) Mini-Circuits (R) INTERNET http://www.minicircuits.com P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 Distribution Centers NORTH AMERICA 800-654-7949 * 417-335-5935 * Fax 417-335-5945 * EUROPE 44-1252-832600 * Fax 44-1252-837010 Mini-Circuits ISO 9001 & ISO 14001 Certified Page 6 of 10 ZX76-31R5-PN Digital Step Attenuator Outline Drawing Outline Dimensions ( inch mm ) A B C D E F G H J K L M N P Q R S 1.20 .75 .46 1.18 .04 .17 .45 .59 .33 .21 .22 .18 1.00 .50 .35 .18 .09 30.5 19.1 11.6 30.0 1.0 4.3 11.4 14.9 8.3 5.3 5.6 4.6 25.4 12.7 8.9 4.6 2.3 WT. GRAMS 35.0 Recommended Mounting Hardware: Use UNC#2 pan head screws with internal tooth lock washers for unit mounting. Mini-Circuits (R) INTERNET http://www.minicircuits.com P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 Distribution Centers NORTH AMERICA 800-654-7949 * 417-335-5935 * Fax 417-335-5945 * EUROPE 44-1252-832600 * Fax 44-1252-837010 Mini-Circuits ISO 9001 & ISO 14001 Certified Page 7 of 10 ZX76-31R5-PN Digital Step Attenuator Simplified Schematic RF Input 16dB 8dB Parallel Control 4dB 2dB 1dB 0.5dB RF Out Internal Control Logic Interface Latch Enable The ZX76-31R5-PN parallel interface consists of 6 control bits that select the desired attenuation state, as shown in Table 1: Truth Table Table 1. Truth Table Attenuation State C16 C8 C4 C2 C1 C0.5 Reference 0 0 0 0 0 0 0.5 (dB) 0 0 0 0 0 1 1 (dB) 0 0 0 0 1 0 2 (dB) 0 0 0 1 0 0 4 (dB) 0 0 1 0 0 0 8 (dB) 0 1 0 0 0 0 16 (dB) 1 0 0 0 0 0 31.5 (dB) 1 1 1 1 1 1 Note: Not all 64 possible combinations of C0.5 - C16 are shown in table The parallel interface timing requirements are defined by Figure 1 (Parallel Interface Timing Diagram) and Table 2 (Parallel Interface AC Characteristics), and switching speed. For latched parallel programming the Latch Enable (LE) should be held LOW while changing attenuation state control values, then pulse LE HIGH to LOW (per Figure 1) to latch new attenuation state into device. For direct parallel programming, the Latch Enable (LE) line should be pulled HIGH. Changing attenuation state control values will change device state to new attenuation. Direct mode is ideal for manual control of the device (using hardwire, switches, or jumpers). Control cables for programming and CD with software can be ordered separately. For details see page 9. Figure 1: Parallel Interface Timing Diagram Table 2. Parallel Interface AC Characteristics LE Symbol Parallel Data C16:C0.5 tPDSUP tLEPW Parameter Min. Units tLEPW LE minimum pulse width 10 ns tPDSUP Data set-up time before clock rising edge of LE 10 ns tPDHLD Data hold time after clock falling edge of LE 10 ns tPDHLD Power-up State When the attenuator powers up and LE is logic low, the nominal attenuation is set on 0 dB. When LE is logic high, the nominal attenuation selected upon control logics ( see Table 1 ). Mini-Circuits (R) INTERNET http://www.minicircuits.com P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 Distribution Centers NORTH AMERICA 800-654-7949 * 417-335-5935 * Fax 417-335-5945 * EUROPE 44-1252-832600 * Fax 44-1252-837010 Mini-Circuits ISO 9001 & ISO 14001 Certified Page 8 of 10 ZX76-31R5-PN Digital Step Attenuator Recommended Accessories Two optional cable accessories with and without interface connector are available with ZX76-31R5-PN, the ZX76-CP and ZX76-WP. ZX76-CP shielded cable with interface 25 pin D-type connector J4 and supplied software are used to control the ZX76-31R5-PN digital attenuator from a computer, using LPT port. ZX76-WP shielded cable without interface 25 pin D-type connector enables customer to use the ZX76-31R5-PN digital attenuator in his own application. Cable length is 4.9 feet / 1.5 meters. Note: Mini-Circuits can supply control cables with other options for the J4 connector and/or different cable lengths. Consult factory with your specific requirements. ZX76-CP Control Cable J4 J1 W1P2*wiring information ZX76-CP W1P1 N/C 1 J1-Pin J4-Pin 2Number Number 3 J1-1 J4-8 4 J1-2 N/C J4-3 5 J1-3 J4-2 6 J1-5 N/C J4-7 7 J1-6 J4-20 J4-5 8 J1-8 J1-9 J4-6 9 10J1-10N/C J4-4 Function18 LE Description Wire Color * 25 pin D-type connector, other pins are N/C. 2 Latch Enable Input WHITE C1 Control for attenuation bit, 1 dB C0.5 19 Control for attenuation bit, 0.5 dB YELLOW C16 BLUE Control for attenuation bit, 16 dB C8 3 Ground connection 20 Control for attenuation bit, 4 dB 4 Control for attenuation bit, 8 dB C2 Control for attenuation bit, 2 dB GND C4 GREEN BLACK ORANGE BROWN RED Note: Other pins not connected. Cable shield connected to case ground. Mini-Circuits (R) INTERNET http://www.minicircuits.com P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 Distribution Centers NORTH AMERICA 800-654-7949 * 417-335-5935 * Fax 417-335-5945 * EUROPE 44-1252-832600 * Fax 44-1252-837010 Mini-Circuits ISO 9001 & ISO 14001 Certified Page 9 of 10 ZX76-31R5-PN Digital Step Attenuator ZX76-WP Control Cable J1 ZX76-WP wiring information Pin Number Function Description Wire Color J1-1 LE Latch Enable Input WHITE J1-2 C1 Control for attenuation bit, 1 dB YELLOW J1-3 C0.5 Control for attenuation bit, 0.5 dB GREEN J1-5 C16 Control for attenuation bit, 16 dB BLUE J1-6 GND Ground connection BLACK J1-8 C4 Control for attenuation bit, 4 dB ORANGE J1-9 C8 Control for attenuation bit, 8 dB BROWN J1-10 C2 Control for attenuation bit, 2 dB RED Note: Other pins not connected. Cable shield connected to case ground. W1P1 W1P2* N/C Ordering Information 1 18 2 3 2 Model Number Description 4 N/C 19 5 Digital attenuator - Parallel interface ZX76-31R5-PN N/C (Negative and Positive) 6 Dual Voltage 3 7 ZX76-CP Cable accessory with interface connector 20connector 8 Cable accessory without interface ZX76-WP ZX76-CD* 4 9 CD ROM ZX76 programming software *Note: To receive the CD, request placing order. 10 whenN/C Mini-Circuits (R) * 25 pin D-type connector, other pins are N/C. Quantity Min. No. of Units Price $ Ea. 1-9 79.95 1 19.95 1 15.95 1 No Charge INTERNET http://www.minicircuits.com P.O. Box 350166, Brooklyn, New York 11235-0003 (718) 934-4500 Fax (718) 332-4661 Distribution Centers NORTH AMERICA 800-654-7949 * 417-335-5935 * Fax 417-335-5945 * EUROPE 44-1252-832600 * Fax 44-1252-837010 Mini-Circuits ISO 9001 & ISO 14001 Certified Page 10 of 10