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TC7652 Datasheet(PDF) 1 Page - TelCom Semiconductor, Inc |
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TC7652 Datasheet(HTML) 1 Page - TelCom Semiconductor, Inc |
1 / 6 page 3-281 TELCOM SEMICONDUCTOR, INC. 7 6 5 4 3 1 2 8 TC7652 LOW NOISE, CHOPPER-STABILIZED OPERATIONAL AMPLIFIER FUNCTIONAL BLOCK DIAGRAM 1 2 3 4 8 7 6 5 C A OUTPUT TC7652CPA –INPUT +INPUT VSS VSS VDD VDD C B CLAMP 1 2 3 4 5 6 7 14 13 12 11 10 9 8 NC NC = NO INTERNAL CONNECTION (MAY BE USED AS INPUT GUARD) INT/EXT EXT CLK IN INT CLK OUT OUTPUT OUTPUT CLAMP RET C –INPUT +INPUT NC TC7652CPD C B C A TC7652 NULL NULL OUTPUT B B A C EXT C EXT CRET (NOTE 1) NULL AMPLIFIER MAIN AMPLIFIER OUTPUT CLAMP CIRCUIT INTERMOD COMPARATOR OSCILLATOR B A INT/EXT EXT CLK IN CLK OUT 14-PIN DIP ONLY BA INPUTS OUTPUT CLAMP (NOT ON "Z" PINOUT) NOTE: 1. For 8-pin DIP connect to VSS, or to CRET on "Z" pinout. VSS TC7652-7 9/11/96 FEATURES s Low Offset Over Temperature Range ............ 10 µV s Ultra-Low Long-Term Drift ................. 150nV/Month s Low Temperature Drift ............................. 100nV/ °C s Low DC Input Bias Current ............................. 15pA s High Gain, CMRR and PSRR ................. 110dB Min s Low Input Noise Voltage ......... 0.2 µVP-P; DC to 1Hz s Internally-Compensated for Unity-Gain Operation s 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 band- width) 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 exter- nal trim components. Like the TC7650, the TC7652 re- quires only two noncritical external caps for storing the chopped null potentials. There are no significant chopping spikes, internal effects or overrange lockup problems. PIN CONFIGURATIONS ORDERING INFORMATION Temperature Part No. Package Range TC7652CPA 8-Pin Plastic DIP 0 °C to +70°C TC7652CPD 14-Pin Plastic DIP 0 °C to +70°C |
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