AFE3256TFU

Analog Front End (AFE) Overview

The AFE3256TFU is a 256-channel analog front-end (AFE) designed for digital X-ray flat-panel detectors. It integrates 256 integrators, correlated double samplers (CDS), and a 256:2 analog multiplexer with two 16-bit SAR ADCs. The device operates on a single 1.85V supply and outputs serial data via LVDS. Key performance metrics include 440 electrons RMS noise within a 1.2-pC input charge range, ±2 LSB integral nonlinearity at 16 bits, and scan times ranging from less than 16 μs to 204.8 μs.

Analog Front End (AFE) Feature Summary

• 256 channels with integrated 16-bit ADCs and LVDS output
• Programmable full-scale input charge range of 0.3pC to 12.5pC
• Internal timing generator and software-programmable electron/hole integration modes
• Pipelined integrate-and-read architecture for improved throughput

Analog Front End (AFE) Applications

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

Analog Front End (AFE) Procurement Notes

Verify the specific package variant when ordering, as the AFE3256 series includes both TFU (320 pins) and TFV (315 pins) options. Confirm RoHS status and lead finish details against the latest Package Option Addendum, as manufacturing parameters may be subject to change without notice.

Analog Front End (AFE) Selection Notes

Select the AFE3256TFU for applications requiring a custom chip-on-film (COF) package with 320 connections. Ensure system requirements align with the 0°C to +70°C operating temperature range and the single 1.85V power supply constraint. Consider binning mode support if specific channel matching is required.

Analog Front End (AFE) Part Context

The AFE3256 functions as a readout integrated circuit (ROIC) optimized for battery-powered systems through sleep and standby power-down modes. Power consumption ranges from 1mW/ch to 2mW/ch depending on the active mode. The device supports in-system debug options to facilitate overall system performance optimization.

Analog Front End (AFE) Replacement Considerations

The AFE3256TFV serves as an alternative package option within the same family, featuring 315 pins in a different COF form factor. Verify pin compatibility and mechanical dimensions before substituting between TFU and TFV variants.