CS3011-ISZ

Overview

The CS3011-ISZ is a single-channel precision low-voltage operational amplifier designed for DC to 1 kHz applications. It features a maximum input offset voltage of ±10 µV and an average drift of ±0.05 µV/°C. The device delivers a typical open-loop gain of 300 dB with a slew rate of 2 V/µs. Operating from a supply voltage range of 2.7 V to 6.7 V, it consumes 0.9 mA at 25°C. Input noise density is 12 nV/√Hz at 1 Hz, with a 0.1 to 10 Hz peak-to-peak noise of 250 nV. It utilizes an 8-lead SOIC package.

Feature Summary

• Patented architecture providing ultra-high open-loop gain suitable for high closed-loop gain applications
• Rail-to-rail output swing capability with common mode input range including the negative supply rail
• Integrated power-down function on Pin 1 for reduced current consumption in standby states

Applications

• Thermocouple and thermopile signal amplification
• Load cell and bridge transducer amplifiers
• Precision instrumentation circuits
• Battery-powered measurement systems

Procurement Notes

Verify the specific suffix ISZ indicates lead-free construction and compliance with RoHS standards. Confirm the package type matches the required 8-lead SOIC footprint. Check the operating temperature range specification against environmental requirements. Ensure the single-channel configuration aligns with circuit design needs rather than dual-channel alternatives.

Selection Notes

Select this component when designing circuits requiring high gain stability over time and temperature. Verify that the application bandwidth remains below 1 kHz to maintain optimal performance characteristics. Consider external compensation capacitors if the closed-loop gain exceeds 50 V/V or feedback resistors exceed 100 ohms. Evaluate the power-down pin functionality for system-level power management strategies.

Part Context

The CS3011-ISZ belongs to the Cirrus Logic CS301x series of precision amplifiers. It serves as the single-channel counterpart to the CS3012 dual amplifier. Both devices share identical electrical specifications and architectural features. The series targets low-level signal conditioning where offset stability and low noise are critical parameters.

Replacement Considerations

The CS3012-ISZ offers identical electrical performance but provides two channels in the same package.