FEATURES
D 240SPS Data Rate with 4MHz Clock D 20-Bit Effective Resolution D Input Multiplexer with Two Differential Channels D Pin-Selectable, High-Impedance Input Buffer D ±5V Differential Input Range D 0.0003% INL (typ), 0.0015% INL (max) D Self-Calibrating D Simple 2-Wire Serial Interface D On-Chip Temperature Sensor D Single Conversions with Standby Mode D Low Current Consumption: 300µA D Analog Supply: 2.7V to 5.5V APPLICATIONS
D Hand-Held Instrumentation D Portable Medical Equipment D Industrial Process Control D Weigh Scales DESCRIPTION
A delta-sigma (∆Σ) modulator and digital filter form the basis of the A/D converter. The analog modulator has a ±5V differential input range. An input multiplexer (MUX) is used to select between two separate differential input channels. A buffer can be selected to increase the input impedance of the measurement. A simple, 2-wire serial interface provides all the necessary control. Data retrieval, self-calibration, and Standby mode are handled with a few simple waveforms.
Texas Instruments
