The ADAS1134 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.
All converted channel results are output on a single, low voltage differential signaling (LVDS), self clocked serial interface, which reduces external hardware.
An SPI-compatible serial interface allows configuration of the ADC using the SDI input. The SDO output allows the user to daisy-chain several ADCs on a single, 3-wire bus. The ADAS1134 uses IOVDD, a separate supply, to reduce digital noise effect on the conversions.
The ADAS1134 is available in a 10 mm × 10 mm, 242-ball CSP_BGA package.
- 128-channel, low level current-to-digital converter
- Up to 24-bit resolution
- Up to 22.6 kSPS (44.2 ?s integration time)
- Simultaneous sampling
- No dead time, no loss of charge
- Ultralow noise down to 0.32 fC rms (2000 e?)
- LVDS self clocked serial data interface
- Serial peripheral interface (SPI) configuration registers (daisy-chain capability
