TC7650CPA

The TC7650CPA is a chopper stabilized Operational Amplifier practically removes offset voltage error terms from system error calculations. The 5μV maximum VOS specification, for example, represents a 15 times improvement over the industry standard OP07E. The 50nV/°C offset drift specification is over 25 times lower than the OP07E. The increased performance eliminates VOS trim procedures, periodic potentiometer adjustment and the reliability problems caused by damaged trimmers. The TC7650 performance advantages are achieved without the additional manufacturing complexity and cost incurred with laser or "Zener zap" VOS trim techniques. The TC7650 nulling scheme corrects both DC VOS errors and VOS drift errors with temperature. A nulling amplifier alternately corrects its own VOS errors and the main amplifier VOS error. Offset nulling voltages are stored on two user supplied external capacitors. The capacitors connect to the internal amplifier VOS null points.

• 0.7μV Typical low input offset voltage
• 10pA Maximum low input bias current
• 120dB Minimum high open loop voltage gain
• 20mW Low power operation
• Output clamp speeds recovery time
• Compensated internally for stable unity gain operation
• Direct replacement for ICL7650

Applications

Sensing & Instrumentation, Medical, Signal Processing