CS5520-BSZ

Analog To Digital Converters (ADC) Overview

The CS5520-BSZ is a monolithic CMOS analog-to-digital converter featuring a 20-bit delta-sigma modulator and a two-channel differential architecture. It integrates a chopper-stabilized instrumentation amplifier with fixed gain of 25, a programmable gain amplifier (PGA) with selectable gains of 1, 2, 4, or 8, and a 4-bit DAC for coarse offset trimming. The device supports unipolar or bipolar input modes and utilizes an external reference voltage between VREF+ and VREF-. Digital filtering provides rejection of frequencies above 12 Hz with a 4.096 MHz clock. Power consumption is 37.5 mW in normal operation and 10 µW in standby mode.

Analog To Digital Converters (ADC) Feature Summary

• 20-bit resolution with no missing codes and linearity error of ±0.0015% FS
• On-chip instrumentation amplifier with 200 kHz bandwidth and >200 dB CMRR at 50/60 Hz
• Integrated 4-bit DAC for offset removal and system calibration capability
• Supports DC or AC bridge excitation with software-selectable demodulation

Analog To Digital Converters (ADC) Applications

• Strain gauge measurements
• Load cell digitization
• Pressure transducer signal conditioning

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix BSZ corresponds to the SOIC-28 package and tube packaging configuration. Confirm that the component meets RoHS compliance requirements for the intended manufacturing process. Check for end-of-life status as older Crystal Semiconductor products may have limited availability from Cirrus Logic.

Analog To Digital Converters (ADC) Selection Notes

Select the CS5520-BSZ when 20-bit resolution is required for low-level bridge transducer signals. Ensure the application can support dual power supplies (+/- 5V typical) as specified in the recommended operating conditions. Verify that the serial interface timing constraints align with the host microcontroller capabilities.

Analog To Digital Converters (ADC) Part Context

The CS5520 is part of the CS5516/CS5520 family produced by Cirrus Logic's Crystal Semiconductor division. While functionally similar to the CS5516, the CS5520 offers higher 20-bit resolution compared to the CS5516's 16-bit output. Both devices share the same pinout and calibration methodologies but differ in digital word length and noise performance specifications.

Analog To Digital Converters (ADC) Replacement Considerations

The CS5516 is a compatible alternative if 16-bit resolution is sufficient for the application. No direct modern equivalents are listed in the provided documentation; legacy stock or surplus channels may be required.