CS3302-ISZR

Overview

The CS3302-ISZR is a high-input-impedance, differential input, differential output amplifier with programmable gain, optimized for amplifying signals from high-impedance sensors such as hydrophones. It features selectable gains of x1, x2, x4, x8, x16, x32, and x64 via pin settings. The device supports a signal bandwidth from DC to 2 kHz, with a maximum differential signal amplitude of 5 Vpp. Key electrical parameters include an ultra-low input bias current of less than 1 pA, typical noise of 1 µVp-p between 0.1 Hz and 10 Hz, and -118 dB typical total harmonic distortion (THD). Power consumption varies by mode: 5 mA in normal operation, 3.3 mA in low-power mode, and 10 µA in power-down mode.

Feature Summary

• High-input-impedance differential architecture designed for sensitive sensor interfaces
• Programmable binary-weighted gain selection via simple pin configurations
• Ultra-low input bias current and excellent low-frequency noise performance
• Integrated multiplexed inputs supporting sensor, test DAC, and termination options

Applications

• Amplification of signals from high-impedance sensors such as hydrophones
• Pre-amplification stages for precision data acquisition systems
• Low-noise instrumentation front-ends requiring high dynamic range

Procurement Notes

Verify the ISZR suffix indicates tape-and-reel packaging when sourcing. Confirm RoHS compliance status for the specific revision. Ensure the supplier provides official Cirrus Logic documentation to validate the part number against the discontinued or active status listed in public databases. Cross-reference the package type with system board requirements.

Selection Notes

Select this component when interfacing with high-impedance sources like hydrophones where input bias current must be minimized. Choose based on required gain steps and bandwidth up to 2 kHz. Consider power supply flexibility, as it supports single or dual configurations. Evaluate noise specifications against system sensitivity requirements, particularly the 1 µVp-p low-frequency noise floor.

Part Context

The CS3302 belongs to Cirrus Logic's family of precision analog front-end amplifiers. It is often paired with delta-sigma modulators like the CS5371/72 for complete signal chain solutions. The ISZR variant specifically denotes the industrial temperature range and reel packaging format within the broader CS3302 product line.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.