ADAS1256 256-Channel, 16-Bit Charge-to-Digital AFE on Flex
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.
APPLICATIONS
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.
Features and Benefits- 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
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Data Sheets
Order Information
| Part Number | Package | Packing Qty | Temp Range | Price 100-499 | Price 1000+ | RoHS |
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| AD8450ASTZ Production | 80 ld LQFP (14x14mm) | OTH 90 | -40 to 85C | 8.34 | 6.95 | Y |
| AD8450ASTZ-RL Production | 80 ld LQFP (14x14mm) | REEL 1000 | -40 to 85C | 8.34 | 6.95 | Y |
Evaluation Boards
| Part Number | Description | Price | RoHS |
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| AD8450-EVALZ | Evaluation Board for 80-Lead LQFP package | 260 | Y |
