- July 07, 2017
July 7, 2017 -- ams released the AS5900, a current-to-digital converter for use in Computed Tomography (CT) scanners.
The analog performance of the AS5900 is intended to enable new CT scanners to produce sharper, more detailed images. Medical CT scanners equipped with the AS5900 will feature an improved X-ray detector module, and will help physicians to produce more accurate diagnoses while subjecting patients to lower doses of radiation.
The ams detector chip provides detailed motion-free medical images while operating at high acquisition rates: the adjustable integration time can be set as low as 50 µs;.
The configurable design of the AS5900 gives it the flexibility required for integration into different types of end equipment that use a multiple-slice photodiode array. The chip is deisgned for use not only in medical equipment, but also in industrial and security CT scanners. Equipment designers can configure or adjust:
· gain setting, to configure the input-current full-scale range and the noise floor
· power modes, to adapt power consumption to the detector requirements
· clock frequency, to balance the resolution with the required integration time
The AS5900 integrates all the functions of a current-input ADC to minimize the requirement for external components. It includes an internal reference voltage and temperature sensorThe AS5900 also provides a standard LVDS interface to a host FPGA, running at a data rate of up to 80 Mb/s for optimized power consumption.
An evaluation board is available on request from ams.