DDC3256
Features
- Single-chip solution to directly measure 256 lowlevel currents simultaneously
- Adjustable full-scale charge range up to 320 p C
- Input current: 1 µA (maximum)
- Adjustable speed with integration times as low as
50 µs (20 KSPS per channel)
- Resolution: 24 bit
- Low power dissipation: 1.2 m W/channel
- Integral non-linearity: ±0.025% of reading ±1 ppm of full scale range (all channels active)
- Low noise: 0.26 f Crms at 320 p C FSR with 20 p F sensor capacitance
- No charge loss
- On-chip temperature sensor
- Serial LVDS output interface
- Single 1.85-V supply
- In-package bypass capacitors and reference buffer to reduce PCB area and design plexity
2 Applications
- CT Scanner data acquisition system
- Photodiode sensors
- X-ray detection systems
- Optical fiber power monitoring
- Muti-channel current, voltage instrumentation
3 Description
The DDC3256 is a 24-bit, 256-channel, current-input analog-to-digital (A/D) converter. It bines both, current-to-voltage conversion by...
