AFE2256
Overview
The AFE2256 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, and 256:4 analog multiplexers.
- 1 256 Channels
- On-Chip, 16-Bit ADC
- Photodiode Short Immunity
- High Performance: - Noise: 750 Electrons RMS (1.2-pC Input Charge Range) - Low Correlated Noise - Integral Nonlinearity: ±2 LSB with Internal 16-Bit ADC - Scan Time: - < 20 µs to 204.8 µs
- Integration: - Six Selectable, Full-Scale Input Ranges: 0.6 pC (Min) to 9.6 pC (Max) - Internal Timing Generator (TG) - Built-In Correlated Double Sampler - Pipelined Integrate and Read for Improved Throughput: Allows Data Read During Integration - Serial LVDS Output
- Simple Power-Supply Scheme: - AVDD1 = 1.85 V - AVDD2 = 3.3 V
- Low Power Consumption
- Nap and Total Power-Down Mode
- Custom Chip-On-Film (COF) Packages
