Packaging information
| Package | Pins COF (TDR) | 325 |
| Operating temperature range (°C) 0 to 85 |
| Package qty | Carrier 32 | JEDEC TRAY (5+1) |
Features for the AFE2256
- 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
Description for the 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