TC7652CPD Microchip

TC7652 Low Noise, Chopper Stabilized Operational Amplifier Features General Description Low Offset Over Temperature Range: 10V The TC7652 is a lower noise version of the TC7650, sacrificing some input specifications (bias current and Ultra Low Long Term Drift: 150nV/Month bandwidth) to achieve a 10x reduction in noise. All the Low Temperature Drift: 100nV/ C other benefits of the chopper technique are present, Low DC Input Bias Current: 15pA (i.e, freedom from offset adjust, drift and reliability prob- High Gain, CMRR and PSRR: 110dB Min lems from external trim components). Like the TC7650, Low Input Noise Voltage: 0.2Vp-p (DC to 1Hz) the TC7652 requires only two noncritical external caps Internally Compensated for Unity Gain Operation for storing the chopped null potentials. There are no significant chopping spikes, internal effects or over- Clamp Circuit for Fast Overload Recovery range lockup problems. Applications Instrumentation Medical Instrumentation Embedded Control Temperature Sensor Amplifier Strain Gage Amplifier Device Selection Table Temperature Part Number Package Range TC7652CPA 8-Pin Plastic DIP 0C to +70C TC7652CPD 14-Pin Plastic DIP 0C to +70C Package Type 8-Pin DIP C 1 8 C A B -Input 2 7 V DD TC7652CPA +Input 3 6 Output Output V 4 5 SS Clamp 14-Pin DIP C B 1 14 INT/EXT EXT CLK C A 2 13 In INT CLK NC 3 12 Out TC7652CPD -Input 4 11 V DD +Input 5 10 Output Output NC 6 9 Clamp 7 8 C V RETN SS NC = No Internal Connection (May Be Used As Input Guard) 2001-2012 Microchip Technology Inc. DS21464C-page 1TC7652 Functional Block Diagram TC7652 14-Pin DIP Only Output Clamp Output Clamp INT/EXT (Not On Pinout) Circuit Oscillator EXT CLK IN CLK OUT Main Amplifier A B Inputs Output C B NULL Intermod Comparator C A B B BA NULL Amplifier A C (1) RETN NULL V SS NOTE 1: For 8-pin DIP connect to V , or to C on pinout. SS RET DS21464C-page 2 2001-2012 Microchip Technology Inc.