IVC102U ,PRECISION SWITCHED INTEGRATOR TRANSIMPEDANCE AMPLIFIERFEATURESThe IVC102 is ideal for amplifying low-level sensorl ON-CHIP INTEGRATING CAPACITORScurrents ..
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IVC102P-IVC102U
PRECISION SWITCHED INTEGRATOR TRANSIMPEDANCE AMPLIFIER
® IVC102 PRECISION SWITCHED INTEGRATOR TRANSIMPEDANCE AMPLIFIER DESCRIPTION APPLICATIONS The IVC102 is a precision integrating amplifier withl PRECISION LOW CURRENT MEASUREMENT FET op amp, integrating capacitors, and low leakage l PHOTODIODE MEASUREMENTS FET switches. It integrates low-level input current for l IONIZATION CHAMBER MEASUREMENTS a user-determined period, storing the resulting voltage l CURRENT/CHARGE-OUTPUT SENSORS on the integrating capacitor. The output voltage can be held for accurate measurement. The IVC102 providesl LEAKAGE CURRENT MEASUREMENT a precision, lower noise alternative to conventional transimpedance op amp circuits that require a very high value feedback resistor. FEATURES The IVC102 is ideal for amplifying low-level sensor l ON-CHIP INTEGRATING CAPACITORS currents from photodiodes and ionization chambers. l GAIN PROGRAMMED BY TIMING The input signal current can be positive or negative. l LOW INPUT BIAS CURRENT: 750fA max TTL/CMOS-compatible timing inputs control the inte- gration period, hold and reset functions to set thel LOW NOISE effective transimpedance gain and to reset (discharge) l LOW SWITCH CHARGE INJECTION the integrator capacitor. l FAST PULSE INTEGRATION Package options include 14-Pin plastic DIP and SO-14 l LOW NONLINEARITY: 0.005% typ surface-mount packages. Both are specified for the –40°C to 85°C industrial temperature range. l14-PIN DIP, SO-14 SURFACE MOUNT V+ 14 C 60pF –1 6 3 V = I (t) dt O IN ∫ C V INT B 5 C 30pF 2 Positive or Negative
Signal Integration 4 C 10pF Ionization
1 Chamber S 3 2 10 0V I IN V 2 O S 1 Hold Integrate Hold Reset 1 9 S 1 Photodiode S 11 12 13 2 Analog
V– Ground Digital
S S 1 2 Ground Logic Low closes switches International Airport Industrial Park • Mailing Address: PO Box 11400 • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706 Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132 ® 1 © 1996 Burr-Brown Corporation PDS-1329A IVC102 Printed in U.S.A. June, 1996 SBFS009
