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AFE1256 - 256-Channel Analog Front-End

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General Description

The AFE1256 is a 256-channel, analog front-end (AFE) designed to suit the requirements of flat-panel detectors (FPDs) based on 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 16-bit, successive-approximation register (SAR) analog-todigital converters (ADCs) onboard.

Serial data from the ADCs are available in SPI™ format.

Overview

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community AFE1256 SBAS630D – OCTOBER 2013 – REVISED MAY 2016 AFE1256 256-Channel, Analog Front-End for Digital X-Ray, Flat-Panel Detectors.

Key Features

  • 1 256 Channels.
  • On-Chip, 16-Bit ADC.
  • Photodiode Short Immunity.
  • Column Short Immunity.
  • High Performance:.
  • Noise: 758 e-RMS with 28-pF Sensor Capacitor in 1.2-pC Range.
  • Integral Nonlinearity: ±2 LSB with Internal 16-Bit ADC.
  • Minimum Scan Time:.
  • 37.9 µs in Normal Mode.
  • 20 µs in 2x Binning Mode.
  • Integration:.
  • Eight Selectable Full-Scale Ranges: 0.15 pC (Min) to 9.6 pC (Max).
  • Built-In.

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