AFE0256 Datasheet, PDF (1/5 Pages) Texas Instruments – 256-Channel Analog Front-End for Flat-Panel Digital X-Ray Detector

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
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•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 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)
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.
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.
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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
SPI is a trademark of Motorola.
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All other trademarks are the property of their respective owners.
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PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2012–2013, Texas Instruments Incorporated