GENERAL DESCRIPTION
The ADAS1128 is a 128-channel, current-to-digital, analog-to digital converter (ADC). It contains 128 low power , low noise, low input current integrators, simultaneous sample-and-holds, and two high speed, high resolution ADCs with configurable sampling rate and resolutions up to 24 bits.

FEA TURES
128-channel, low level current-to-digital converter
Up to 24-bit resolution
Up to 19.7 kSPS (50.7 µs integration time)
Simultaneous sampling
Ultralow noise (down to 0.4 fC [2500e

])
User-adjustable full-scale range
INL: ±0.025% of reading ±0.75 ppm of FSR
Very low power dissipation: 4.5 mW/channel
L VDS self-clocked serial data interface
SPI configuration registers (daisy-chain)
On-board temperature sensor and reference buffer
10 mm × 10 mm, mini-BGA package
Low cost external components
Support tools
  Evaluation board
  Reference design with reference layout
  FPGA  Verilog code

APPLICA TIONS
Medical, industrial, and security CT scanner data acquisition
Photodiode sensors
Dosimetry and radiation therapy systems
Optical fiber power monitoring
X-ray detection systems
High channel-count data acquisition systems (current or voltage inputs)