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)