DDC264

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community DDC264 SBAS368D – MAY 2006 – REVISED DECEMBER 2016 DDC264 64-Channel, Current-Input Analog-to-Digital Converter 1 Features 1 Single-Chip Solution to Directly Measure 64 LowLevel Currents Proven High-Precision, True Integrating Architecture With 100% Charge Collection Easy Upgrade for Existing DDC Family Applications Very Low Power: 3 mW/channel Extremely Linear: INL = ±0.025% of Reading ±1 ppm of FSR Low Noise: 6.3 ppm of FSR Adjustable Full-Scale Range Adjustable Speed – Data Rates up to 6 kSPS With 20-bit Performance – Integration Times as low as 160 µs Daisy-Chainable Serial Interface In-Package Bypass Capacitors Simplify PCB Design 2 Applications CT Scanner DAS Photodiode Sensors X-Ray Detection Systems SPACER SPACER REF3040 OPA350 VREF Buffer Simplified Schematic IN1 IN64 AVDD DVDD VREF Configuration and Control Serial Interface DDC264 CLK CONV DIN_CFG CLK_CFG RESET To/From Controller DVALID DCLK DIN DOUT QGND AGND DGND Copyright © 2016, Texas Instruments Incorporated Protected by US Patent #5841310 3 Description The DDC264 is a 20-bit, 64-channel, current-input analog-to-digital (A/D) converter. It combines both current-to-voltage and A/D conversion so that 64 separate low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized. For each of the 64 inputs, the DDC264 uses the proven dual swit...