CS5571-ISZ

Analog To Digital Converters (ADC) Overview

The CS5571-ISZ is a single-channel, 16-bit analog-to-digital converter (ADC) from Cirrus Logic Inc., housed in a 24-SSOP package. It supports a maximum sampling rate of 100 kSps using a delta-sigma architecture with a low-latency digital filter that settles to full accuracy in one conversion cycle. The device accepts single-ended analog inputs and features on-chip buffers for high input impedance. Analog supply options include +5V/GND or ±2.5V, while the digital interface operates at 1.8V, 2.5V, or 3.3V. Key performance metrics include a signal-to-noise ratio of 92 dB, linearity error of 0.0008%, and DNL of ±0.1 LSB max.

Analog To Digital Converters (ADC) Feature Summary

• 16-bit resolution with 100 kSps throughput capability
• Single-ended analog input with integrated high-impedance buffers
• Low-latency delta-sigma architecture settling in one conversion
• Flexible power supplies: +5V/GND or ±2.5V analog; 1.8V–3.3V digital

Analog To Digital Converters (ADC) Applications

• High-speed data acquisition systems requiring fast settling
• Multiplexed sensor interfaces maintaining throughput during channel switching
• Industrial measurement applications utilizing bipolar or ground-referenced signals

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 prior to integration. Ensure supply voltages remain within recommended operating conditions to maintain specified linearity and noise performance.

Analog To Digital Converters (ADC) Selection Notes

Select the CS5571-ISZ when single-ended input compatibility and rapid settling are required. Use an external low-jitter clock source if digitizing AC signals to minimize jitter-induced noise, as the internal oscillator exhibits approximately 500 ps rms jitter. Ensure the voltage reference magnitude stays between 2.4V and 4.2V, with 4.096V recommended for optimal SNR.

Analog To Digital Converters (ADC) Part Context

The CS5571 belongs to Cirrus Logic's family of high-throughput delta-sigma ADCs. It is distinguished by its ability to switch input channels rapidly without throughput loss, making it suitable for multiplexed environments where other sigma-delta converters might suffer from settling delays.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative 16-bit, 100 kSps ADCs with single-ended inputs and compatible SPI interfaces if replacement is necessary.

Analog To Digital Converters (ADC) FAQ

How does the CS5571 achieve fast settling?

It utilizes a low-latency digital filter architecture combined with a high-speed delta-sigma modulator, allowing the output to settle to full specified accuracy within a single conversion cycle.

What is the impact of the internal oscillator on AC signal measurement?

The internal oscillator has approximately 500 ps rms jitter. For AC signal measurements, this jitter can degrade performance; therefore, an external low-jitter clock source connected to the MCLK pin is recommended.

Can the CS5571 operate with both unipolar and bipolar signals?

Yes. By configuring the BP/UP pin and selecting the appropriate analog supply (+5V/GND for unipolar or ±2.5V for bipolar), the converter supports both signal types.