CS3002-ISZR

Overview

The CS3002-ISZR is a dual precision low-voltage amplifier from Cirrus Logic, housed in an 8-lead SOIC tape and reel package. It features a maximum input offset voltage of 10 µV and a drift of 0.05 µV/°C. The device operates on supply voltages ranging from 2.7V to 6.7V (±1.35V to ±3.35V) with a typical supply current of 3.6mA. Key electrical parameters include a slew rate of 5V/µs, 115dB DC common-mode rejection ratio, and 120dB power supply rejection ratio. Input noise density is 6nV/√Hz at 1kHz, with 0.1 to 10Hz noise of 125 nVpp. The amplifier provides rail-to-rail output swing and supports closed-loop gains up to 50V/V without external compensation.

Feature Summary

• Ultra-high open-loop gain exceeding 200dB minimum for precise signal amplification
• Rail-to-rail output capability maximizing dynamic range within the supply voltage limits
• Low noise performance with minimal 1/f corner frequency for accurate DC measurements
• Patented architecture ensuring stability and high gain at frequencies below 2kHz

Applications

• Thermocouple and thermopile signal amplification
• Load cell and bridge transducer interface circuits
• Precision instrumentation requiring high closed-loop gain
• Battery-powered systems demanding low quiescent current

Procurement Notes

Verify the ISZR suffix indicates tape and reel packaging suitable for automated surface-mount assembly. Confirm the industrial temperature rating (-40°C to +85°C) aligns with environmental requirements. Ensure the order matches the lead-free RoHS specification. Cross-reference the datasheet revision date to validate current electrical characteristics before finalizing procurement specifications.

Selection Notes

Select this component when applications require high DC accuracy and low drift over temperature variations. The device is optimal for band-limited signals below 2kHz where ultra-high open-loop gain minimizes error. Consider external compensation capacitors if designing for closed-loop gains greater than 50V/V or utilizing feedback resistors exceeding 100 ohms to maintain phase margin.

Part Context

This part belongs to the CS3002 family of precision amplifiers designed by Cirrus Logic. It shares architectural similarities with the CS3001 single-channel variant but offers dual channels in a compact SOIC-8 footprint. The series targets low-voltage, battery-operated measurement systems requiring superior offset stability compared to standard operational amplifiers.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pinout compatibility and electrical parameter margins against alternative dual precision amplifiers if sourcing constraints exist.

FAQ

Is external compensation required for stable operation?

External compensation is not required for closed-loop gains less than or equal to 50V/V with feedback resistors under 100 ohms. Compensation capacitors are necessary for higher gains or larger resistor values.

What is the input common mode voltage range?

The input common mode voltage range includes the negative supply rail (V-) and extends up to (V+) minus 1.25V.

How does the amplifier handle overload recovery?

The typical overload recovery time is 100 microseconds, allowing the device to return to linear operation quickly after saturation events.