General Description
The CS5531/32/33/34 are highly integrated ∆Σ Analogto-Digital Converters (ADCs) which use charge-balance techniques to achieve 16-bit (CS5531/33) and 24-bit (CS5532/34) performance. The ADCs are optimized for measuring low-level unipolar or bipolar signals in weigh scale, process control, scientific, and medical applications.

Features
❐ Chopper-stabilized PGIA (Programmable Gain Instrumentation Amplifier, 1x to 64x)
    – 12 nV/√Hz @ 0.1 Hz (No 1/f noise) at 64x
    – 1200 pA Input Current with Gains >1
❐ Delta-sigma Analog-to-digital Converter
    – Linearity Error: 0.0007% FS
    – Noise Free Resolution: Up to 23 bits
❐ Two- or Four-channel Differential MUX
❐ Scalable Input Span via Calibration
    – ±5 mV to differential ±2.5V
❐ Scalable VREF Input: Up to Analog Supply
❐ Simple Three-wire Serial Interface
    – SPI™ and Microwire™ Compatible
    – Schmitt Trigger on Serial Clock (SCLK)
❐ R/W Calibration Registers Per Channel
❐ Selectable Word Rates: 6.25 to 3,840 Sps
❐ Selectable 50 or 60 Hz Rejection
❐ Power Supply Configurations
    – VA+ = +5 V; VA- = 0 V; VD+ = +3 V to +5 V
    – VA+ = +2.5 V; VA- = -2.5 V; VD+ = +3 V to +5 V
    – VA+ = +3 V; VA- = -3 V; VD+ = +3 V