CS5533-ASZ

Analog To Digital Converters (ADC) Overview

The CS5533-ASZ is a four-channel, 16-bit delta-sigma analog-to-digital converter (ADC) from Cirrus Logic. It integrates a chopper-stabilized programmable gain instrumentation amplifier (PGIA) with selectable gains of 1x to 64x and an input current of 1200 pA at higher gains. The device features a linearity error of ±0.003% FS and noise-free resolution up to 23 bits. It supports output word rates from 6.25 to 3,840 Sps and includes a three-wire serial interface compatible with SPI and Microwire. Power supplies include VA+ = +5 V, VA- = 0 V, and VD+ = +3 V to +5 V.

Analog To Digital Converters (ADC) Feature Summary

• Four-channel differential multiplexer with chopper-stabilized PGIA (1x–64x gain).
• 16-bit resolution with ±0.003% FS linearity error and up to 23 bits noise-free resolution.
• Selectable output word rates from 6.25 to 3,840 Sps with 50/60 Hz rejection.
• Three-wire serial interface (SPI/Microwire compatible) with Schmitt trigger on SCLK.

Analog To Digital Converters (ADC) Applications

• Weigh scale systems
• Process control instrumentation
• Scientific measurement equipment
• Medical devices

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'ASZ' against the manufacturer's latest ordering information to confirm package type, temperature range, and environmental compliance status. Cross-reference the datasheet revision DS289F7 for any updates to electrical characteristics or pin configurations before finalizing procurement specifications.

Analog To Digital Converters (ADC) Selection Notes

Select the CS5533-ASZ when four independent differential channels are required within a single ADC package. Ensure the application signal span fits within the scalable input range of ±5 mV to ±2.5 V. Verify that the system clock frequency allows for the desired output word rate and that the power supply configuration matches the specified VA+ and VD+ requirements.

Analog To Digital Converters (ADC) Part Context

This component belongs to the CS5531/32/33/34-AS family of high-precision ADCs. The CS5533 variant specifically provides four channels, whereas the CS5531 offers two channels. Both utilize 16-bit architecture, distinguishing them from the 24-bit CS5532 and CS5534 models in the same series.

Analog To Digital Converters (ADC) Replacement Considerations

The CS5531-ASZ serves as a direct substitute if only two channels are needed, sharing identical electrical characteristics and pinouts. Other members of the CS553x-AS family may require software adjustments due to differences in channel count or resolution.

Analog To Digital Converters (ADC) FAQ

What is the input current specification for the CS5533-ASZ at gains greater than 1?

At gains greater than 1, the input current is typically 1200 pA.

How many selectable output word rates does the CS5533-ASZ support?

It supports twenty selectable output word rates ranging from 6.25 Sps to 3,840 Sps.

Is the serial interface of the CS5533-ASZ compatible with standard protocols?

Yes, it features a simple three-wire serial interface that is compatible with both SPI and Microwire protocols.