CS3301-ISZ

Overview

The CS3301-ISZ is a low-noise, chopper-stabilized CMOS differential input and output amplifier with programmable gain. It features selectable gains of x1, x2, x4, x8, x16, x32, and x64 via pin settings. The device supports multiplexed inputs (INA, INB) and an internal 800Ω termination. It provides rough and fine charge outputs optimized for interfacing with CS5371/72 modulators. Operating from single or dual power supplies, it delivers a signal bandwidth from DC to 2 kHz with a maximum differential signal amplitude of 5 Vpp.

Feature Summary

• Chopper-stabilized architecture ensures flat noise performance down to 0.1 Hz.
• Multiplexed analog inputs allow connection of sensors, test DACs, or internal termination.
• Separate rough and fine charge outputs simplify integration with delta-sigma modulators.
• Configurable low-power and power-down modes reduce energy consumption.

Applications

• Signal acquisition systems utilizing CS5371/72 delta-sigma modulators
• Amplification of low-impedance differential sensors such as geophones
• Low-frequency measurement systems requiring high dynamic range
• Precision instrumentation involving hydrophone signals

Procurement Notes

Verify the specific suffix ISZ indicates lead-free composition and RoHS compliance. Confirm the package type is 24-pin SSOP. Check the moisture sensitivity level rating before storage. Ensure supply voltages are established prior to applying analog signals to prevent latch-up conditions. Review absolute maximum ratings for thermal and electrical limits.

Selection Notes

Select this component for applications requiring ultra-low noise amplification of differential signals in the sub-kilohertz range. The binary weighted gain selection allows flexibility for varying sensor amplitudes. Consider the integrated anti-alias resistors at the outputs when designing external filtering. Verify compatibility with the digital control logic levels used in the system microcontroller or configuration EEPROM.

Part Context

This part belongs to the CS3301 family of precision analog front-end amplifiers manufactured by Cirrus Logic. It is specifically engineered to interface with the company's CS5371 and CS5372 delta-sigma modulators. The device serves as a critical stage in high-resolution data acquisition chains, providing necessary signal conditioning before digitization.

Replacement Considerations

CS3301-IS