AFE0256 256-Channel Analog Front-End for Flat-Panel Digital X-ray Detector | TI.com

AFE0256
This product has been released to the market and is available for purchase. For some products, newer alternatives may be available.
256-Channel Analog Front-End for Flat-Panel Digital X-ray Detector

 

Recommended alternative parts

  • AFE0064  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device.   The AFE0064 has 64 channels instead of 256 channels
  • AFE2256  - The device has SIMILAR FUNCTIONALITY but is not functionally equivalent to the compared device. 

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.

The device also features four 14-bit successive-approximation register (SAR) analog-to-digital converters (ADCs) on board. Serial data from the ADCs are available in SPI format.

Hardware-selectable integration polarity allows positive or negative charge integration and provides more flexibility in system design. The Nap feature enables substantial power saving that is especially useful in battery-powered systems.

The AFE0256 is available as a 22-mm × 5-mm singulated format with known good gold-bump dies.

Features

  • 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
      High-Resolution 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)

Parametrics

Compare all products in Digital X-ray AFEs Email Download to Excel
Part number Order Number of input channels Resolution (Bits) Features Operating temperature range (C) Approx. price (US$)
AFE0256 Order now 256     14     Differential Outputs
Internal Reference Buffer
Nap Mode
Power Down    
0 to 85     98.25 | 1ku