General Description

The CS5521/22/23/24/28 are highly integrated ∆Σ analog-to-digital converters (ADCs) which use charge balance techniques to achieve 16-bit (CS5521/23) and 24-bit (CS5522/24/28) performance. The ADCs come as either two-channel (CS5521/22), four-channel (CS5523/24), or eight-channel (CS5528) devices and include a low-input-current, chopper-stabilized instrumentation amplifier.

Features

● Low Input Current (100 pA), Chopper

stabilized Instrumentation Amplifier

● Scalable Input Span (Bipolar/Unipolar)

- 2.5V VREF: 25 mV, 55 mV, 100 mV, 1 V,

2.5 V, 5 V

- External: 10 V, 100 V

● Wide VREF Input Range (+1 to +5 V)

● Fourth Order Delta-Sigma A/D Converter

● Easy to Use Three-wire Serial Interface Port

- Programmable/Auto Channel Sequencer with

Conversion Data FIFO

- Accessible Calibration Registers per Channel

- Compatible with SPI™ and Microwire™

● System and Self Calibration

● Eight Selectable Word Rates

- Up to 617 Sps (XIN = 200 kHz)

- Single Conversion Settling

- 50/60 Hz ±3 Hz Simultaneous Rejection

● Single +5 V Power Supply Operation

- Charge Pump Drive for Negative Supply

- +3 to +5 V Digital Supply Operation

● Low Power Consumption: 6.0 mW