CS3001-ISZR

Overview

The CS3001-ISZR is a single-channel precision low-voltage operational amplifier designed for high-gain signal amplification. It features a maximum input offset voltage of 10 μV and an average drift of 0.05 μV/°C. The device operates on a supply voltage ranging from 2.7 V to 6.7 V, consuming approximately 2.1 mA at 5 V. Key electrical parameters include a typical open-loop gain of 300 dB, a slew rate of 5 V/μs, and a noise density of 6 nV/√Hz at 1 Hz. The package is an 8-lead SOIC.

Feature Summary

• Patented architecture delivering ultra-high open-loop gain suitable for precision measurement applications
• Rail-to-rail output swing capability with excellent common-mode rejection ratio
• Integrated power-down function on the single amplifier variant for reduced current consumption
• Low noise performance optimized for DC to 2 kHz bandwidth operation

Applications

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

Procurement Notes

Verify that the ISZR suffix corresponds to the tape and reel packaging format rather than tube packaging. Confirm the lead-free status and RoHS compliance requirements match your manufacturing standards. Ensure the operating temperature range of -40°C to +85°C aligns with your system environmental specifications before finalizing procurement orders.

Selection Notes

Select this component when high closed-loop gains are required alongside strict offset stability constraints. The internal compensation characteristics necessitate specific feedback resistor values or external capacitors for gains exceeding 50 V/V. Consider the dual-channel CS3002 if multiple identical amplifier stages are needed within the same footprint constraints.

Part Context

This part belongs to the Cirrus Logic CS3001/CS3002 family of precision amplifiers. These devices utilize a patented multi-stage architecture to achieve super-high open-loop gain while maintaining low noise and low drift over time and temperature variations. They are specifically engineered for applications requiring precise amplification of low-level signals.

Replacement Considerations

The CS3002 serves as the dual-channel equivalent within the same product family. Verify pinout compatibility and electrical parameter alignment when substituting other precision op-amps, particularly regarding the unique open-loop gain slope and phase margin characteristics documented in the datasheet.

FAQ

How should the amplifier be compensated for closed-loop gains greater than 50 V/V?

A compensation capacitor (C2) must be added in parallel with the feedback resistor R2. The value should be calculated to ensure the zero falls on the steep slope of the loop gain plot, typically using the formula C2 = 1 / (2 * pi * R1 * P1) where P1 is set to 1 MHz.

What is the recommended maximum value for the series input resistor R1?

R1 should be less than or equal to 100 ohms to maintain inherent stability without additional compensation. Higher resistance values introduce an additional pole that reduces phase margin.