- 256-channel, charge-to-digital converter
- 16-bit resolution with no missing codes
- Simultaneous sampling
- User adjustable full-scale range up to 32pC
- Down to 22 µs line time
- Ultralow noise: 560 e− at 2pC range
- INL ±2.5lsb or 57.5ppm , ADC included
- Very low power dissipation
- Multiple functional power modes: from 1mW/ch to 3mW/ch
- Multiple sleep and power modes down to 0.005mW/ch
- Capable of measuring electron or hole collected charge
- See data sheet for additional features
The ADAS1256 is a 256-channel, charge-to-digital analog-front end (AFE) mounted on high density flex. It can be directly mounted on a digital X-ray panel. It is suitable for a large variety of digital X-ray and photodiode array applications and it works with both hole sensing and electron sensing panels. ADAS1256 allows up to 22us line time, so it can be used in dynamic imaging panels in addition to still image panels. It contains 256 low power, low noise, low input current integrators with correlated double sampling stages; along with integrated true 16 bit high speed ADCs.
All converted channel results are output on a single LVDS self-clocked serial interface that significantly reduces external hardware. An SPI-compatible serial interface allows configuration of the AFE using SDI input. The SDO output allows the user to daisy chain several AFEs on a single 3-wire bus.
An integrated AFE timing sequencer controls the sampling activity of the analog front end (AFE). The sequencer is programmed via the SPI port and is timed by a single clock, ACLK.APPLICATIONS
- Digital X-ray panel
- Photodiode sensors array
- CT Scanner
- High channel count data acquisition systems
(current or voltage input)
- TFT panel readout
Please contact the ADC Development Group for additional technical information.
For additional ADI Healthcare Products and related information, please visit www.analog.com/healthcare
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.