CS3302-ISZ

Overview

The CS3302-ISZ is a high-input-impedance, differential input, differential output amplifier with programmable gain. It features selectable gains of x1, x2, x4, x8, x16, x32, and x64. The device supports multiplexed inputs including INA, INB, and an internal 800Ω termination. It provides rough and fine charge outputs for modulators. Input bias current is less than 1 pA. Noise performance is 1 µVp-p (0.1 Hz to 10 Hz) and 8.5 nV/√Hz (200 Hz to 2 kHz). Total Harmonic Distortion is -118 dB typical. Power consumption is 5 mA normal, 3.3 mA low power, and 10 µA power down. Supply voltages are VA+ = +5 V, VA- = 0 V or ±2.5 V, and VD = +3.3 V to +5 V.

Feature Summary

• High-input-impedance differential amplifier optimized for high-impedance sensors
• Programmable binary-weighted gain selection via pin settings
• Multiplexed analog inputs with internal termination option
• Dedicated rough and fine charge outputs for modulator interfacing

Applications

• Amplifying signals from high-impedance sensors such as hydrophones
• Acquisition systems using CS5371/72 single/dual ΔΣ modulators
• Systems utilizing the CS5376A quad digital filter

Procurement Notes

Verify the specific ordering suffix ISZ indicates lead-free packaging and confirms the industrial temperature range of -40°C to +85°C. Confirm the 24-pin SSOP package dimensions match the design requirements. Check for any environmental compliance certificates required by the destination market. Ensure supply voltage levels align with the specified unipolar or bipolar configurations.

Selection Notes

Select this component when amplifying low-frequency, high-dynamic-range signals requiring minimal distortion. It is suitable for applications needing ultra-low input bias current and excellent noise performance. Consider the available gain steps and multiplexing capabilities for system flexibility. Evaluate power consumption modes if energy efficiency is critical for the application.

Part Context

The CS3302 is part of Cirrus Logic's precision analog signal chain products. It is designed to interface directly with delta-sigma modulators. The device simplifies system design by integrating gain control and input multiplexing. It targets professional audio and scientific measurement applications requiring high fidelity.

Replacement Considerations

CS3302-IS

FAQ

What is the maximum differential signal amplitude supported by the CS3302?

The maximum signal amplitude is 5 Vpp differential.

How is the guard output used in the circuit?

The GUARD pin outputs the common mode voltage to drive cable shields between high-impedance sensors and the amplifier inputs, minimizing leakage.

What are the digital logic levels for the CS3302?

The device is driven with CMOS logic levels, where high-level input drive voltage is 0.6*VD to VD and low-level is 0.0 to 0.8 V.