AFE2256TBF

Analog Front End (AFE) Overview

The AFE2256TBF is a 256-channel analog front-end (AFE) designed for digital X-ray flat-panel detectors. It integrates 256 integrators, a programmable gain amplifier, correlated double samplers with dual banking, and 256:4 analog multiplexers. The device features four 16-bit successive-approximation register (SAR) ADCs with serial LVDS output. Key performance metrics include 750 electrons RMS noise at a 1.2-pC input charge range, integral nonlinearity of ±2 LSB, and scan times from less than 20 µs to 204.8 µs. Power supply requirements are AVDD1 = 1.85 V and AVDD2 = 3.3 V.

Analog Front End (AFE) Feature Summary

• 256 integrated channels with on-chip 16-bit SAR ADCs
• Low noise performance: 750 electrons RMS (1.2-pC input)
• Pipelined integrate-and-read architecture for improved throughput
• Nap and total power-down modes for energy efficiency

Analog Front End (AFE) Applications

• Flat-panel X-ray detectors
• Charge detectors
• Capacitance measurement

Analog Front End (AFE) Procurement Notes

Verify the specific suffix 'TBF' against the official orderable part number list in the Packaging Information addendum. The provided datasheet lists active production parts such as AFE2256TBN, TDR, and TDU. Confirm that the requested suffix corresponds to an available package type and operating temperature range before procurement.

Analog Front End (AFE) Selection Notes

Select this component for applications requiring high channel density and low noise in digital radiography systems. Ensure the system design accommodates the custom Chip-On-Film (COF) packaging format. Verify that the required full-scale input charge range (0.6 pC to 9.6 pC) aligns with the detector's signal characteristics.

Analog Front End (AFE) Part Context

The AFE2256 belongs to Texas Instruments' family of analog front-ends specifically engineered for medical imaging. It serves as a readout integrated circuit (ROIC) for flat-panel detectors, converting analog pixel signals into digital data via internal ADCs and multiplexers.

Analog Front End (AFE) Replacement Considerations

Publicly confirmed substitute part numbers for the AFE2256 are not listed in the provided documentation. Cross-referencing requires consulting TI's official product comparison tools or authorized distributor databases for compatible 256-channel X-ray AFEs.