AFE2256 Data Sheet, Product Information And Support

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Home Data converters Integrated & special-function data converters Medical AFEs Digital X-ray AFEs AFE2256 ACTIVE

256-channel analog front end (AFE) for digital X-ray flat-panel detectors

Order now Data sheet

• document-pdfAcrobat AFE2256 256-Channel, Analog Front-End for Digital X-Ray, Flat-Panel Detectors datasheet (Rev. C) PDF | HTML

A newer version of this product is available

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Similar functionality to the compared device

AFE3256 ACTIVE 256-channel analog front end (AFE) for dynamic and semi-dynamic X-ray flat-panel detectors Higher integration, fast scan time

AFE2256

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Product details

Number of input channels 256 Resolution (Bits) 16 Features Internal Reference Buffer, Nap Mode, Power Down, X-ray Interface type SPI/LVDS Operating temperature range (°C) 0 to 85 Rating Catalog Number of input channels 256 Resolution (Bits) 16 Features Internal Reference Buffer, Nap Mode, Power Down, X-ray Interface type SPI/LVDS Operating temperature range (°C) 0 to 85 Rating Catalog COF (TBN) 325 1039.525 mm² 48.35 x 21.5 COF (TDR) 325 1039.525 mm² 48.35 x 21.5 COF (TDU) 320 1064 mm² 38 x 28

• 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 (Minimum) to 9.6 pC (Maximum)
  • Internal Timing Generator (TG)
  • Built-In Correlated Double Sampler
  • Pipelined Integrate-and-Read for Improved Throughput—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 Modes
• Custom Chip-On-Film (COF) Packages

• 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 (Minimum) to 9.6 pC (Maximum)
  • Internal Timing Generator (TG)
  • Built-In Correlated Double Sampler
  • Pipelined Integrate-and-Read for Improved Throughput—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 Modes
• Custom Chip-On-Film (COF) Packages

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 with dual banking, and 256:4 analog multiplexers.

The device also features four 16-bit successive-approximation register (SAR) analog-to-digital converters (ADCs). Serial data from the ADCs are available in low-voltage differential signaling (LVDS) format.

The nap and power-down modes enable substantial power savings, and are especially useful in battery-powered systems.

To request a full datasheet or other design resources: request AFE2256

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 with dual banking, and 256:4 analog multiplexers.

The device also features four 16-bit successive-approximation register (SAR) analog-to-digital converters (ADCs). Serial data from the ADCs are available in low-voltage differential signaling (LVDS) format.

The nap and power-down modes enable substantial power savings, and are especially useful in battery-powered systems.

To request a full datasheet or other design resources: request AFE2256

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Technical documentation

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Type	Title	Date
*	Data sheet	AFE2256 256-Channel, Analog Front-End for Digital X-Ray, Flat-Panel Detectors datasheet (Rev. C)	PDF | HTML	13 Dec 2023
White paper	Simplifying Power Conversion in High-Voltage Systems	PDF | HTML	09 Nov 2023
Analog Design Journal	Selecting a multichannel ultra-low-current measurement IC	PDF | HTML	18 Mar 2022
Technical article	Advancements in X-ray imaging	PDF | HTML	28 Mar 2017

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Evaluation board

AFE2256EVM — AFE2256 256-channel AFE for digital X-ray flat-panel detectors evaluation module

The AFE2256EVM is a compact USB based evaluation kit for evaluating the AFE2256 COF, a 256-channel analog front-end. The EVM is self-contained with DACs and power generation on-board which greatly reduces its dependency on external equipment. The kit consists of an EVM and two separate COF adapters (...)

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Package	Pins	CAD symbols, footprints & 3D models
COF (TBN)	325	Ultra Librarian
COF (TDR)	325	Ultra Librarian
COF (TDU)	320	Ultra Librarian

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