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