AFE0256

AFE0256 www.ti.com SBAS560A – DECEMBER 2012 – REVISED AUGUST 2013 256-Channel Analog Front-End for Flat-Panel Digital X-Ray Detector Check for Samples: AFE0256 FEATURES 1 23 256 Channels On-Chip, 14-Bit ADC High Performance: – Noise: 758 electronRMS (eRMS) with 28-pF Sensor Capacitor in 1.2-pC Range – Integral Nonlinearity: ±1.25 LSB with Internal 14-Bit ADC – Minimum Scan Time: – Normal Mode: 37.9 µs, Internal ADC – 2x Binning Mode: 26 µs, Internal ADC Integration: – Eight Selectable, Full-Scale Ranges: – 0.15 pC (min) to 9.6 pC (max) – Built-In Correlated Double Sampler – 2x Binning for Faster Throughput: – Averages Charge of Two Adjacent Channels – Pipelined Integration and Read: – Allows Data Read During Integration Flexibility: – Electron and Hole Integration – Analog Output Provided for External HighResolution ADC Low Power: – 2.9 mW per Channel with ADC – 2.3 mW per Channel without ADC – 0.1 mW per Channel in Nap Mode – Total Power-Down Feature 22-mm × 5-mm Gold-Bump Die Suitable for Tape Carrier Package (TCP) or Chip-on-Film (COF) APPLICATIONS Flat-Panel X-Ray Detectors DESCRIPTION The AFE0256 is a 256-channel analog front-end (AFE) designed to suit the requirements of flat-panel detector (FPD)-based digital x-ray systems. The device includes 256 integrators, a programmable gain amplifier (PGA) for full-scale charge level selection, a correlated double sampler (CDS) with dual banking, 256:4 analog multiplexers, and four differential output drivers....