DPAD SERIES MONOLITHIC DUAL PICO AMPERE DIODES Linear Integrated Systems FEATURES Direct Replacement For SILICONIX DPAD SERIES HIGH ON ISOLATION 20fA EXCELLENT CAPACITANCE MATCHING ∆CR ≤ 0.2pF ABSOLUTE MAXIMUM RATINGS1 DPAD DPAD1 TO-72 BOTTOM VIEW TO-78 BOTTOM VIEW C A1 3 5 A2 K1 1 7 K2 @ 25 °C (unless otherwise stated) Maximum Temperatures Storage Temperature -65 to +150 °C Operating Junction Temperature -55 to +135 °C 5 K2 K1 1 7 A2 SOIC 500mW Maximum Currents Forward Current (DPAD) 3 SSTDPAD Maximum Power Dissipation Continuous Power Dissipation (DPAD) 4 A1 K1 1 8 K2 K1 2 7 K2 A1 3 6 A2 NC 4 5 NC 50mA COMMON ELECTRICAL CHARACTERISTICS @ 25 °C (unless otherwise stated) SYMBOL CHARACTERISTIC BVR Reverse Breakdown Voltage VF |CR1-CR2| Crss MIN DPAD1 -45 DPAD2,5,10,20,50,100 -45 SSTDPAD5,50,100 -30 Forward Voltage TYP MAX UNITS 0.8 Differential Capacitance (∆CR) Total Reverse Capacitance IR = -1µA V 1.5 DPAD1 0.2 ALL OTHERS 0.5 DPAD1 0.8 DPAD2,5,10,20,50,100 2.0 SSTDPAD5,50,100 4.0 CONDITIONS IF = 1mA VR1 = VR2 = -5V, f = 1MHz pF VR = -5V, f = 1MHz SPECIFIC ELECTRICAL CHARACTERISTICS @ 25 °C (unless otherwise stated) SYMBOL IR DPAD2 CHARACTERISTIC Maximum Reverse 2 Leakage Current SSTDPAD2 (SST)DPAD1 -1 (SST)DPAD2 -2 (SST)DPAD5 -5 (SST)DPAD10 -10 (SST)DPAD20 -20 (SST)DPAD50 -50 -50 (SST)DPAD100 -100 -100 Linear Integrated Systems UNITS CONDITIONS -5 pA VR = -20V • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490-9160 • Fax: 510 353-0261 Figure 1. Operational Amplifier Protection Input Differential Voltage limited to 0.8V (typ) by DPADs D1 and D2. Common Mode Input voltage limited by DPADs D3 and D4 to ±15V. Figure 2. Sample and Hold Circuit Typical Sample and Hold circuit with clipping. DPAD diodes reduce offset voltages fed capacitively from the JFET switch gate. FIGURE 1 FIGURE 2 +V DPAD10 D1 DPAD1 D1 OP-27 D2 -V +V D2 2N4117A + D3 D4 ein +15V -15V CONTROL SIGNAL 2N4393 C SOIC TO-78 TO-72 VOUT R Four Lead 0.230 DIA. 0.209 0.195 DIA. 0.175 0.030 MAX. 0.150 0.115 4 LEADS 0.500 MIN. 0.019 DIA. 0.016 0.305 0.335 0.021 1 8 2 7 3 6 4 5 SEATING PLANE 0.150 0.157 0.100 1 3 1 0.048 0.028 0.0075 0.0098 3 4 5 7 0.100 45° 4 0.189 0.196 0.0040 0.0098 0.200 0.029 0.045 2 0.050 MIN. 0.500 0.016 0.021 DIM. B 0.050 0.046 0.036 0.014 0.018 MAX. 0.040 0.165 0.185 0.016 0.019 DIM. A 0.100 45° 0.335 0.370 0.2284 0.2440 DIMENSIONS IN INCHES 0.028 0.034 1. Absolute maximum ratings are limiting values above which serviceability may be impaired. 2. The DPAD type number denotes its maximum reverse current value in pico amperes. Devices with IR values intermediate to those shown are available upon request. Information furnished by Linear Integrated Systems is believed to be accurate and reliable. However, no responsibility is assumed for its use; nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Linear Integrated Systems. Linear Integrated Systems • 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490-9160 • Fax: 510 353-0261