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
