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TC911B Datasheet(PDF) 2 Page - Microchip Technology |
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TC911B Datasheet(HTML) 2 Page - Microchip Technology |
2 / 14 page TC911A/TC911B DS21481C-page 2 © 2005 Microchip Technology Inc. General Description The TC911 CMOS auto-zeroed operational amplifier is the first complete monolithic chopper stabilized ampli- fier. Chopper operational amplifiers like the ICL7650/ 7652 and LTC1052 require user supplied, external off- set compensation storage capacitors. External capac- itors are not required with the TC911. Just as easy to use as the conventional OP07 type amplifier, the TC911 significantly reduces offset voltage errors. Pinout matches the OP07/741/7650 8-pin mini-DIP configuration. Several system benefits arise by eliminating the exter- nal chopper capacitors: lower system parts count, reduced assembly time and cost, greater system reli- ability, reduced PC board layout effort and greater board area utilization. Space savings can be significant in multiple amplifier designs. Electrical specifications include 15 μV maximum offset voltage and 0.15 μV/°C maximum offset voltage tem- perature co-efficient. Offset voltage error is five times lower than the premium OP07E bipolar device. The TC911 improves offset drift performance by eight times. The TC911 operates from dual or single power sup- plies. Supply current is typically 350 μA. Single 4.5V to 16V supply operation is possible, making single 9V bat- tery operation possible. The TC911 is available in 2 package types: 8-pin plastic DIP and SOIC. Functional Block Diagram + – + – VDD V SS TC911A TC911B -Input +Input A 2 3 47 B * * A B 6 Main Amplifier Low Impedance Output Buffer Internal Oscillator (FOSC 200HZ) VOS Correction Amplifier + – Output Note: Internal capacitors. No external capacitors required. |
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