CS5522-ASZR

Analog To Digital Converters (ADC) Overview

The CS5522-ASZR is a 24-bit, two-channel analog-to-digital converter (ADC) from Cirrus Logic. It utilizes a fourth-order delta-sigma architecture with an integrated chopper-stabilized instrumentation amplifier and programmable gain amplifier (PGA). The device supports selectable input spans ranging from 25 mV to 5 V when using a 2.5 V reference, or external spans up to 100 V. It operates on a single +5 V supply, featuring an internal charge pump for negative bias generation. The ADC provides eight selectable output word rates, reaching up to 617 Sps with a 200 kHz clock, and includes a three-wire serial interface compatible with SPI and Microwire protocols.

Analog To Digital Converters (ADC) Feature Summary

• 24-bit resolution with integrated chopper-stabilized instrumentation amplifier offering low input current (100 pA typical).
• Scalable input span capability supporting ranges from 25 mV to 5 V internally, or up to 100 V externally.
• Single +5 V power supply operation with internal charge pump drive for generating negative bias voltage.
• Three-wire serial interface compatible with SPI and Microwire standards, including programmable channel sequencer.

Analog To Digital Converters (ADC) Applications

• Process control systems requiring high-precision measurement of low-level signals.
• Ground-based thermocouple measurement applications utilizing the charge pump drive feature.
• Bridge sensor measurements in industrial environments.

Analog To Digital Converters (ADC) Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment against the 24-SSOP specification. Review the latest datasheet revision for any updates to electrical characteristics or ordering information prior to integration.

Analog To Digital Converters (ADC) Selection Notes

Select the CS5522-ASZR for applications requiring 24-bit resolution and two differential inputs. Ensure the system clock frequency aligns with the desired output data rate, noting that maximum throughput requires a 200 kHz XIN. Verify that the external reference voltage falls within the 1 V to 5 V range and that the digital supply voltage matches the logic levels of the host microcontroller.

Analog To Digital Converters (ADC) Part Context

The CS5522-ASZR belongs to the CS5521/22/23/24/28 family of delta-sigma ADCs. While the CS5521/23 offer 16-bit resolution, the CS5522/24/28 provide 24-bit performance. The CS5522 specifically features two channels, whereas the CS5523/24 have four channels and the CS5528 has eight channels. All variants share similar architectural features including the PGA and serial interface.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should evaluate other members of the CS552x family based on channel count requirements or consult manufacturer resources for cross-reference recommendations.