CS5521-AP

Analog To Digital Converters (ADC) Overview

The CS5521-AP is a highly integrated analog-to-digital converter (ADC) from Cirrus Logic, offering 16-bit resolution. It belongs to the CS552x family which includes 2, 4, or 8-channel variants. The device utilizes charge-balance techniques and features a low-input-current, chopper-stabilized instrumentation amplifier with a programmable gain amplifier (PGA). It supports selectable input spans ranging from 25 mV to 5 V with a 2.5 V reference, or up to 100 V externally. The ADC includes a fourth-order delta-sigma modulator and digital filters that settle within one conversion cycle, rejecting 50 Hz and 60 Hz interference at rates below 30 Sps.

Analog To Digital Converters (ADC) Feature Summary

• 16-bit resolution using charge-balance technique
• Low input current (100 pA) chopper-stabilized instrumentation amplifier
• Programmable Gain Amplifier (PGA) for scalable input spans
• Integrated charge pump drive for ground-based thermocouple applications

Analog To Digital Converters (ADC) Applications

• Process control systems requiring isolated and non-isolated signal measurement
• Ground-based thermocouple measurements
• Low-level signal acquisition in industrial environments

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'AP' against the official Cirrus Logic datasheet to confirm package type and temperature range. Check for End-of-Life notifications as related models in this series have been subject to lifecycle changes. Ensure compatibility with single-supply operation requirements.

Analog To Digital Converters (ADC) Selection Notes

Select the CS5521-AP when 16-bit resolution is sufficient for the application, distinguishing it from the 24-bit CS5522/24/28 variants. Confirm the required channel count (2, 4, or 8) matches the base model designation. Verify that the input span requirements align with the internal PGA capabilities or external scaling needs.

Analog To Digital Converters (ADC) Part Context

The CS5521-AP is part of the CS5521/22/23/24/28 family of ADCs. While the base number indicates resolution and channel configuration, the suffix defines physical packaging and environmental ratings. This component is designed for single-supply operation and interfaces via a three-wire serial port compatible with SPI and Microwire standards.

Analog To Digital Converters (ADC) Replacement Considerations

Direct replacements depend on the required resolution and channel count. For 24-bit performance, consider the CS5522 (2-channel), CS5524 (4-channel), or CS5528 (8-channel). Verify pinout and register compatibility before substituting.