DDC114 - Texas Instruments

DDC114 20-Bit Analog-To-Digital Converter

The DDC114 is a 20-bit, quad channel, current-input analog-to-digital (A/D) converter. It combines both current-to-voltage and A/D conversion so that four low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized. For each of the four inputs, the DDC114 provides a dual-switched integrator front-end. This des.

Features

D SINGLE-CHIP SOLUTION TO DIRECTLY MEASURE FOUR LOW-LEVEL CURRENTS D HIGH PRECISION, TRUE INTEGRATING FUNCTION D INTEGRAL LINEARITY: ±0.01% of Reading ±0.5ppm of FSR D VERY LOW NOISE: 5.2ppm of FSR D LOW POWER: 13.5mW/channel D ADJUSTABLE DATA RATE: Up to 3.125kSPS D PROGRAMMABLE FULL SCALE D DAISY-CHAINABLE SERIAL INTERFACE APPLICATIONS D CT SCANNER DAS D PHOTODIODE SENSORS D INFRARED PYROMETERS D LIQUID/GAS CHROMATOGRAPHY Protected by US Patent #5841310 AVDD VREF DVDD IN1 Dual Switched Integrator IN3 Dual Switched Integrator IN2 Dual Switched Integrator IN4 Dual Switched Integrator AGND.