CS5531-AS

Single ADC Delta-Sigma 3.84KSPS 16Bit Serial 20Pin SSOP

General Description

The CS5531/32/33/34 are highly integrated ∆ΣAnalogto-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-channelDifferential MUX

‰Scalable Input Span via Calibration

  – ±5 mV to differential ±2.5V

‰Scalable VREFInput: 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