DDC3256 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 current integration, and A/D conversion. Up to 256 individual low-level current output devices, such as photodiodes, can be directly connected to its inputs and digitized in parallel (simultaneously).
DDC3256 Key Features
- Single-chip solution to directly measure 256 lowlevel currents simultaneously
- Adjustable full-scale charge range up to 320 pC
- Input current: 1 µA (maximum)
- Adjustable speed with integration times as low as
- Resolution: 24 bit
- Low power dissipation: 1.2 mW/channel
- Integral non-linearity: ±0.025% of reading ±1 ppm
- Low noise: 0.26 fCrms at 320 pC FSR with 20 pF
- No charge loss
- On-chip temperature sensor