Texas Instruments DDC112 Dual Current Input 20-Bit Analog-To-Digital Converter DDC112UKG4

The DDC112 is a dual current input, 20-bit analog-to-digital converter designed for high precision applications. It features a monolithic charge measurement architecture, allowing direct connection of low-level current output devices such as photosensors. The device offers programmable full-scale ranges and utilizes continuous integration with dual switched integrators for each input, enhancing its dynamic range and accuracy. Key specifications include an integral linearity of ±0.005% reading ±0.5ppm FSR and a noise performance of 3.2ppm rms, making it suitable for applications requiring high precision, such as CT scanner data acquisition systems, infrared pyrometers, and liquid/gas chromatography. The DDC112 operates on a single supply and supports cascading multiple units to minimize interconnections. It is available in SO-28 and TQFP-32 packages, with specified performance over a temperature range of -40°C to +85°C.