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| DPAD SERIES Linear Integrated Systems FEATURES MONOLITHIC DUAL PICO AMPERE DIODES Direct Replacement For SILICONIX DPAD SERIES HIGH ON ISOLATION 20fA EXCELLENT CAPACITANCE MATCHING ABSOLUTE MAXIMUM RATINGS1 @ 25 C (unless otherwise stated) Maximum Temperatures Storage Temperature Operating Junction Temperature Maximum Power Dissipation Continuous Power Dissipation (DPAD) Maximum Currents Forward Current (DPAD) 50mA 500mW -65 to +150 C -55 to +135 C K1 DPAD TO-72 BOTTOM VIEW A1 3 5 DPAD1 TO-78 BOTTOM VIEW C A1 4 3 5 CR 0.2pF A2 K2 1 7 K2 K1 1 7 A2 SSTDPAD SOIC K1 K1 A1 NC 1 2 3 4 8 7 6 5 K2 K2 A2 NC COMMON ELECTRICAL CHARACTERISTICS @ 25 C (unless otherwise stated) SYMBOL BVR VF |CR1-CR2| CHARACTERISTIC Reverse Breakdown Voltage Forward Voltage Differential Capacitance (CR) Total Reverse Capacitance DPAD1 ALL OTHERS DPAD1 Crss DPAD2,5,10,20,50,100 SSTDPAD5,50,100 SPECIFIC ELECTRICAL CHARACTERISTICS @ 25 C (unless otherwise stated) SYMBOL CHARACTERISTIC (SST)DPAD1 (SST)DPAD2 (SST)DPAD5 IR Maximum Reverse 2 Leakage Current (SST)DPAD10 (SST)DPAD20 (SST)DPAD50 (SST)DPAD100 DPAD2 -1 -2 -5 -10 -20 -50 -100 -50 -100 -5 pA VR = -20V SSTDPAD2 UNITS CONDITIONS DPAD1 DPAD2,5,10,20,50,100 SSTDPAD5,50,100 MIN -45 -45 -30 0.8 1.5 0.2 0.5 0.8 2.0 4.0 pF VR = -5V, f = 1MHz V IR = -1A IF = 1mA VR1 = VR2 = -5V, f = 1MHz TYP MAX UNITS CONDITIONS Linear Integrated Systems * 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 DPAD10 D1 D3 D2 D4 OP-27 + FIGURE 2 +V DPAD1 D1 -V D2 2N4117A 2N4393 C R VOUT +V ein +15V -15V CONTROL SIGNAL TO-72 Four Lead 0.195 DIA. 0.175 0.030 MAX. 0.230 DIA. 0.209 0.150 0.115 TO-78 0.305 0.335 0.335 0.370 MAX. 0.040 0.165 0.185 MIN. 0.500 SEATING PLANE 0.200 0.100 34 5 7 SOIC 0.014 0.018 1 2 0.021 3 4 0.150 0.157 8 7 6 5 0.050 0.189 0.196 0.016 0.019 DIM. A 0.016 0.021 DIM. B 0.029 0.045 1 4 LEADS 0.019 DIA. 0.016 0.100 0.500 MIN. 0.0040 0.0098 0.2284 0.2440 DIMENSIONS IN INCHES 0.050 2 1 3 4 0.0075 0.0098 45 0.046 0.036 45 0.100 0.048 0.028 0.028 0.034 1. 2. Absolute maximum ratings are limiting values above which serviceability may be impaired. 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 |
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