AS5900 CT Detector Interface
128-channel low noise current-to-digital converter
Features
- 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
Benefits
- 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
Tools
| 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 |
Notifications
| 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 |
Related boards
Evaluation Board for AS5900
AS5900EvalBoard
The AS5900 Evaluation Board allows the configuration of the device and the measurement of all relevant parameters like input noise, power consumption, channel uniformity and linearity.
In normal configuration, all parameters are measured with an external test setup to simulate the input current from the photodiodes. The evaluation board is designed in a way to attach a customized photodiode array on top of the AS5900 sample board.
The evaluation kit comes with several adapter boards that are assembled for the different types of measurements. An additional unpopulated adapter board is included in the kit for customer specific input currents optimized for the specific application.