CS5509-ASZ

Analog To Digital Converters (ADC) Overview

The CS5509-ASZ is a single-supply, 16-bit CMOS analog-to-digital converter manufactured by Cirrus Logic. It utilizes delta-sigma charge-balanced techniques to provide high-resolution measurements at output word rates up to 200 samples per second. The device features a differential input with pin-selectable unipolar or bipolar ranges and includes on-chip self-calibration circuitry to minimize offset and full-scale errors. It operates with either a 5V or 3.3V digital interface and consumes ultra-low power of 1.7 mW. The component is housed in a 16-pin SOIC package and supports an industrial temperature range from -40°C to +85°C.

Analog To Digital Converters (ADC) Feature Summary

• 16-bit resolution with no missing codes and linearity error of ±0.0015%FS
• Differential input with common mode rejection of 105 dB at DC and 120 dB at 50/60 Hz
• On-chip self-calibration circuitry for minimum offset and gain errors
• Ultra-low power consumption of 1.7 mW

Analog To Digital Converters (ADC) Applications

• Loop-powered transmitters
• Panel meters
• Weigh scales
• Battery-powered instruments

Analog To Digital Converters (ADC) Procurement Notes

Verify the specific ordering suffix ASZ confirms the 16-pin SOIC package and lead-free composition. Confirm the operating temperature range matches the industrial specification of -40°C to +85°C. Ensure the digital interface voltage requirement aligns with the system's 5V or 3.3V logic levels. Check for any recent product change notices regarding packaging or labeling updates.

Analog To Digital Converters (ADC) Selection Notes

Select this component for applications requiring low-power, high-resolution DC signal measurement. The internal digital filter provides superior line rejection at 50Hz and 60Hz when operated with a 32.768 kHz clock. Consider the source impedance requirements, as the analog input models include 15 pF sampling capacitors that demand current from the source. Ensure the reference voltage between VREF+ and VREF- remains within the 1.0V to 3.6V range.

Analog To Digital Converters (ADC) Part Context

The CS5509 is part of Cirrus Logic's family of single-supply, 16-bit A/D converters. It is designed specifically for the measurement of DC signals using delta-sigma modulation. The device integrates a voltage reference, calibration microcontroller with SRAM, digital filter, and serial interface into a monolithic CMOS structure.

Analog To Digital Converters (ADC) Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify compatibility with existing designs if considering alternative ADCs, particularly regarding pinout, supply voltage, and serial interface timing.

Analog To Digital Converters (ADC) FAQ

What is the maximum output update rate of the CS5509?

The CS5509 provides output word rates up to 200 samples per second.

How does the CS5509 handle line frequency interference?

When operated from a 32.768 kHz clock, the on-chip digital filter offers zeros precisely at 50 Hz and 60 Hz line frequencies and their multiples, providing over 120 dB of rejection.

Can the CS5509 switch between unipolar and bipolar modes without recalibration?

Yes, the converter can be used to convert both unipolar and bipolar signals by changing the BP/UP pin state. Recalibration is not required when switching between these modes.