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AS5900 CT Detector Interface

128-channel low noise current-to-digital converter


  • Flexible configuration to get the optimized operation point in your application
  • Adjustable full scale range, resolution, integration time and power consumption
  • High speed LVDS data interface
  • On board voltage reference and temperature sensor


  • Ultra-low noise down to 3200 electrons for a full-scale range up to 1µA
  • Very fast integration time down to 50µs
  • High linearity of ±250ppm of reading ±1ppm of FSR
  • Very low power dissipation down to 1mW/channel
  • Up to 26-bit resolution

Product parameters

Applications Medical CT, Industrial and Security X-ray scanner
Primary Function Current-to-digital Converter
Channels 128
Resolution [bit] 26
Input Related Noise 0.51
Min. Power Consumption [mW per Channel] 1
Min. Integration Time / Line Time [µs] 50
Package FBGA248 (10mm x 10mm)

General description

The AS5900 device is a low noise, 128-channel current-to-digital converter that enables the readout of the photodiodes with highest sensitivity. High-resolution CT imaging can be achieved up to 26-bits resolution. Its 128-low-noise and high linear converter channels provide an increased gray scale, improved contrast and reduce artifacts of 3D CT images. The low power consumption of 1mW per channel reduces self-heating effects and the overall power consumption of the system. An integrated temperature sensor allows the calibration of temperature drifts of the X-ray detector modules.

This product suits for the following applications:

  • Medical CT, Industrial and Security X-ray scanner
  • Multi-channel sensors with current output (i.e. photodiode arrays)
  • DAS (data acquisition system) for current input


Title Category Headline Buy
AS5900EvalBoard Application Board Evaluation Board for AS5900

Technical documents

Type Description Language
Special Datasheet AS5900 Short Datasheet English

Environmental documents

Type Description Language
RoHS Certificate RoHS Certificate_AS5900 English


Type Description Language
Product Change Notification PCN38-2018 (AS5900) English

Other information

Type Description Language
Block Diagram AS5900 Block Diagram English
Factsheet High resolution CT imaging English
Image AS5900 Front View
Image AS5900 Back View
Image AS5900 Stacked View
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