CS5530

24Bit ADC with Ultra-low-noise Amplifier

**General Description**

The is a highly integrated ΔΣ Analog-to-Digital Converter ADC which uses charge-balance techniques to achieve 24-bit performance. The ADC is optimized for measuring low-level unipolar or bipolar signals in weigh scale, process control, scientific, and medical applications.

**Features ****& Descriptio**

Chopper-stabilized Instrumentation Amplifier, 64X

• 12 nV/√Hz @ 0.1 Hz No 1/f noise

• 1200 pA Input Current

Digital Gain Scaling up to 40x Delta-sigma Analog-to-digital Converter

• Linearity Error: 0.0015% FS

• Noise Free Resolution: Up to 19 bits

Scalable VREF Input: Up to Analog Supply

Simple Three-wire Serial Interface

• SPI™ and Microwire™ Compatible

• Schmitt-trigger on Serial Clock SCLK

Onboard Offset and Gain Calibration Registers

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