AFE1256
- 256 Channels
- On-Chip, 16-Bit ADC
- Photodiode Short Immunity
- Column Short Immunity
- High Performance:
- Noise: 758 e-RMS with 28-pF Sensor
Capacitor in 1.2-pC Range - Integral Nonlinearity:
±2 LSB with Internal 16-Bit ADC - Minimum Scan Time:
- 37.9 µs in Normal Mode
- 20 µs in 2x Binning Mode
- Noise: 758 e-RMS with 28-pF Sensor
- Integration:
- Eight Selectable Full-Scale Ranges:
0.15 pC (Min) to 9.6 pC (Max) - Built-In Correlated Double Sampler
- 2x Binning (Averages Charge of Two Adjacent
Channels) for Faster Throughput - Pipelined Integrate and Read: Allows Data
Read During Integration
- Eight Selectable Full-Scale Ranges:
- Flexibility:
- Electron and Hole Integration
- Low Power:
- 2.9 mW/Ch with ADC
- 2.3 mW/Ch without ADC
- 0.1 mW/Ch in Nap Mode
- Total Power-Down Feature
- 22-mm × 5-mm Gold-Bump Die,
Suitable for TCP and COF
Application
- Flat-Panel, X-Ray Detector
All trademarks are the property of their respective owners.
The AFE1256 is a 256-channel, analog front-end (AFE) designed to suit the requirements of flat-panel detectors (FPDs) based on 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 16-bit, successive-approximation register (SAR) analog-to-digital converters (ADCs) onboard. Serial data from the ADCs are available in SPI™ format.
Hardware-selectable integration polarity allows for the integration of positive or negative charge and provides more flexibility in system design. The Nap feature enables substantial power saving. This power savings is especially useful in battery-powered systems.
The device is available as a 22-mm × 5-mm gold-bumped die and a 38-mm × 28-mm, COF-314 TDS package in singulated forms.
To request a full data sheet or other design resources: request AFE1256
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在 NDA 下提供完整資料表及其他設計資源。立即索取
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | AFE1256 256-Channel, Analog Front-End for Digital X-Ray, Flat-Panel Detectors datasheet (Rev. D) | PDF | HTML | 2016/5/26 | ||
| 類比設計期刊 | Selecting a multichannel ultra-low-current measurement IC | PDF | HTML | 2022/3/18 |
設計與開發
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AFE1256EVM — 適用於平板數位 X 光偵測器的 AFE1256 256 通道 AFE 評估模組
AFE1256EVM 是一款基於 USB 的緊湊型評估套件，用於評估 256 通道類比前端 AFE1256 COF。此 EVM 是獨立的，內建 DAC 和板載模式產生器，大大減少了對外部設備的依賴，因此它只需要一個電源。該套件由一個 EVM、一個單獨的 COF 轉接器以及易於使用的軟體組成，可用於評估 COF 裝置的性能。COF 轉接器為可拆式，因此可以使用單一 EVM 設定來評估多個 COF 轉接器。USB 2.0 介面透過微控制器提供快速配置下載和 FPGA-PC 通訊。
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| COF (TDS) | 314 | Ultra Librarian |
| DIESALE (TD) | — | Ultra Librarian |