Description
The CS5540 is a low-power and low-voltage ∆Σ analog-to-digital converter (ADC), which achieves highly accurate conversions using a simple non-programmable interface that is easy to understand and design-in. It is optimized to convert analog signals in DC measurement applications, such as temperature and pressure measurement, and various portable devices where low-power consumption is required.

Features
● ∆Σ Analog-to-Digital Converter
    - Linearity Error: 0.0015% FS
    - RMS Noise: 4 µV
● Two Channel Differential MUX
● Buffered, Fully Differential Analog and
    Voltage Reference Inputs
● Scalable VREF Input: 0.1 V to Analog Supply
● High Absolute Accuracy via Self-Calibration
● Fixed Digital Filter
    - Single Conversion Settling at 6.7 SPS
    - Simultaneous 50/60 Hz Rejection
● Simple Serial Interface
    - SPITM and MicrowireTM Compatible
    - Schmitt Trigger on Serial Clock (SCLK)
● Low Power
    - Single +3.0 V Supply
    - 330 µA Supply Current
    - 10 µA in Sleep Mode