DDC118 - Texas Instruments

DDC118 20-Bit Analog-To-Digital Converter

The DDC118 is a 20-bit, octal channel, current-input analog-to-digital (A/D) converter. It combines both current-to-voltage and A/D conversion so that eight low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized. For each of the eight inputs, the DDC118 provides a dual-switched integrator front-end. This .

Features

D SINGLE-CHIP SOLUTION TO DIRECTLY MEASURE EIGHT 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 AVDD IN1 Dual Switched Integrator IN3 Dual Switched Integrator IN2 Dual Switched Integrator IN4 Dual Switched Integrator IN5 Dual Switched Integrator IN7 Dual Switched Integrator IN6 Dual Switched Integrator IN8 Dual Switched Integrator AGND VREF ∆Σ Modulator DVDD Dig.