CS5531-ASZ

Analog To Digital Converters (ADC) Overview

The CS5531-ASZ is a two-channel, 16-bit delta-sigma analog-to-digital converter (ADC) from Cirrus Logic. It integrates a chopper-stabilized programmable gain instrumentation amplifier (PGIA) with gains selectable from 1x to 64x and an input current of 1200 pA at higher gains. The device features a fourth-order modulator and digital filter providing twenty selectable output word rates ranging from 6.25 to 3840 Sps. It supports scalable input spans via calibration and includes per-channel read/write calibration registers for offset and gain adjustment.

Analog To Digital Converters (ADC) Feature Summary

• 16-bit resolution with no missing codes
• Chopper-stabilized PGIA with 1x to 64x gain selection
• Ultra-low noise: 12 nV/√Hz @ 0.1 Hz at 64x gain
• Two differential channel inputs with multiplexer
• Three-wire serial interface compatible with SPI and Microwire

Analog To Digital Converters (ADC) Applications

• Weigh scale systems
• Process control instrumentation
• Scientific measurement equipment
• Medical devices requiring low-level signal acquisition

Analog To Digital Converters (ADC) Procurement Notes

Verify the ASZ suffix indicates the specific package variant and environmental compliance status required for the design. Confirm availability as this component series may have end-of-life notifications or obsolescence notices. Ensure the ordering code matches the exact pin count and thermal requirements of the target PCB layout.

Analog To Digital Converters (ADC) Selection Notes

Select the CS5531-ASZ for applications requiring 16-bit accuracy with two differential channels. Choose this part over the CS5532 if 24-bit performance is not necessary, as it offers lower power consumption in some configurations. Ensure the system clock frequency supports the desired output data rate and that the supply voltage ranges match the application's power architecture.

Analog To Digital Converters (ADC) Part Context

The CS5531-ASZ belongs to the CS5531/32/33/34 family of high-integration ADCs. While the CS5531 provides 16-bit performance with two channels, the CS5532 offers 24-bit resolution with two channels, and the CS5533/34 variants provide four channels. This family shares identical peripheral interfaces and amplifier characteristics, differing primarily in resolution and channel count.

Analog To Digital Converters (ADC) Replacement Considerations

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