AFE2256
AFE2256 is 256-Channel Analog Front-End manufactured by Texas Instruments.
Features
- 1 256 Channels
- On-Chip, 16-Bit ADC
- Photodiode Short Immunity
- High Performance:
- Noise: 750 Electrons RMS (1.2-p C 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 p C (Min) to 9.6 p C (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
2 Applications
- Flat-Panel, X-Ray Detectors
- Charge Detectors
- Capacitance Measurement
3 Description
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.
The device also features four 16-bit successiveapproximation 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 saving that is especially useful in batterypowered systems.
To request a full datasheet or other design resources: request AFE2256
PART NUMBER AFE2256
Device Information(1)
PACKAGE
BODY SIZE (NOM)
COF (320)
38.00 mm × 28.00 mm
(1) For all available packages, see the orderable addendum at the end of the data...
