TC7652

1 TC7652 LOW NOISE, CHOPPER-STABILIZED OPERATIONAL AMPLIFIER FEATURES s s s s s s s s Low Offset Over Temperature Range ............ 10µV Ultra-Low Long-Term Drift ................. 150nV/Month Low Temperature Drift ............................. 100nV/°C Low DC Input Bias Current ............................. 15pA High Gain, CMRR and PSRR ................. 110dB Min Low Input Noise Voltage ......... 0.2µVP-P; DC to 1Hz Internally-Compensated for Unity-Gain Operation Clamp Circuit for Fast Overload Recovery GENERAL DESCRIPTION The TC7652 is a lower noise version of the TC7650, sacrificing some input specifications (bias current and bandwidth) to achieve a 10x reduction in noise. All the other benefits of the chopper technique are present, i.e. freedom from offset adjust, drift, and reliability problems from external trim components. Like the TC7650, the TC7652 requires only two noncritical external caps for storing the chopped null potentials. There are no significant chopping spikes, internal effects or overrange lockup problems. 2 3 4 5 PIN CONFIGURATIONS CB 1 CA 2 NC 3 –INPUT 4 +INPUT 5 NC 6 VSS 7 TC7652CPD 14 INT/EXT EXT CLK 13 IN 12 INT CLK OUT 11 VDD 10 OUTPUT 9 8 OUTPUT CLAMP CRET CA 1 –INPUT 2 +INPUT 3 VSS 4 TC7652CPA 8 CB 7 VDD ORDERING INFORMATION Part No. TC7652CPA TC7652CPD Package 8-Pin Plastic DIP 14-Pin Plastic DIP Temperature Range 0°C to +70°C 0°C to +70°C 6 OUTPUT 5 CLAMP NC = NO INTERNAL CONNECTION (MAY BE USED AS INPUT GUARD) FUNCTIONAL BLOCK DIAGRAM...