CS5540-ASZ

Analog To Digital Converters (ADC) Overview

The CS5540-ASZ is a low-power, low-voltage 24-bit delta-sigma analog-to-digital converter (ADC) manufactured by Cirrus Logic Inc. It features two differential input channels with a multiplexer and fully differential buffered analog inputs. The device operates on a single +3.0 V supply with a typical supply current of 330 µA and enters sleep mode consuming 10 µA. It utilizes a fixed digital filter providing single conversion settling at 6.7 SPS with simultaneous 50/60 Hz rejection. Key performance metrics include a linearity error of 0.0015% FS and an RMS noise of 4 µV. The component supports SPI and Microwire compatible serial interfaces.

Analog To Digital Converters (ADC) Feature Summary

• 24-bit resolution with 0.0015% FS linearity error and 4 µV RMS noise
• Two-channel differential MUX with scalable VREF input range from 0.1 V to Analog Supply
• Low power consumption: 330 µA active current and 10 µA in sleep mode on a single +3.0 V supply
• Fixed digital filter offering 6.7 SPS output rate with simultaneous 50/60 Hz interference rejection

Analog To Digital Converters (ADC) Applications

• DC measurement applications such as temperature sensing
• Pressure measurement systems
• Portable devices requiring low-power analog signal conversion

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific suffix 'ASZ' against the manufacturer's latest documentation to confirm RoHS compliance and lead-free status. Check for End-of-Life (EOL) notices or Product Change Notifications (PCNs) as these components may have limited availability or obsolescence risks. Confirm package type and pinout compatibility before integration.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring high absolute accuracy via self-calibration and low power consumption. Ensure the system interface is compatible with SPI or Microwire protocols. Verify that the required sampling rate of 6.7 SPS meets application timing constraints, as the digital filter is fixed and not programmable for higher speeds.

Analog To Digital Converters (ADC) Part Context

The CS5540 belongs to Cirrus Logic's family of precision delta-sigma ADCs designed for industrial and portable instrumentation. It shares architectural similarities with other models like the CS5541 but is optimized for lower voltage operation. The part integrates a chopper-stabilized front-end to minimize offset drift, making it suitable for precision DC measurements where stability is critical.

Analog To Digital Converters (ADC) Replacement Considerations

The CS5541 is a similar low-power 24-bit delta-sigma ADC but is specified for high-voltage applications. Direct substitution requires verification of supply voltage compatibility and pinout alignment. Other members of the CS554x series should be evaluated based on channel count and specific voltage requirements.