CS3011-ISZR

Overview

The CS3011-ISZR is a single-channel precision low-voltage operational amplifier from Cirrus Logic, designed for DC to 1 kHz signal amplification. It features a maximum input offset voltage of ±10 µV and an average drift of ±0.05 µV/°C. Key electrical parameters include a typical open-loop gain of 300 dB, a slew rate of 2 V/µs, and an input noise density of 12 nV/√Hz at 1 Hz. The device operates on supply voltages ranging from 2.7 V to 6.7 V (±1.35 V to ±3.35 V) with a supply current of 0.9 mA. It utilizes an 8-lead SOIC package.

Feature Summary

• Patented architecture delivering 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 amplifiers
• Load cell and bridge transducer amplifiers
• Precision instrumentation systems
• Battery-powered measurement devices

Procurement Notes

Verify the ISZR suffix indicates tape-and-reel packaging versus the ISZ tube variant. Confirm RoHS compliance status as specified in the ordering information section. Ensure the component matches the lead-free 8-pin SOIC physical dimensions provided in the package drawing. Validate that the specific lot date code meets project requirements before finalizing orders.

Selection Notes

Select this amplifier for circuits requiring high gain stability and low drift within the 1 kHz bandwidth limit. Consider the internal 50 pF input capacitance when designing feedback networks for gains exceeding 50 V/V, which may require external compensation capacitors. Evaluate the power-down pin configuration if battery life optimization is critical for the target application design.

Part Context

This component belongs to the CS301x series of precision amplifiers manufactured by Cirrus Logic. The series includes the dual-channel CS3012 variant alongside the single-channel CS3011. These devices share identical electrical characteristics and architectural features, differing primarily in channel count and physical pinout configurations within the same 8-lead SOIC footprint family.

Replacement Considerations

CS3011-ISZ serves as the direct tube-packaged equivalent. Designers should verify compatibility regarding input capacitance and compensation requirements when substituting similar precision amplifiers from other manufacturers.