ADAS1127

NOT RECOMMENDED FOR NEW DESIGNS

64-Channel, 24-Bit Current-to-Digital ADC

Data Sheet (Rev. SpA) Product Selection Table

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Overview

64-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: 6.25 mW/channel
LVDS self-clocked serial data interface
SPI configuration registers (daisy-chain)
On-board temperature sensor and reference buffer
10 mm × 10 mm, mini-BGA package

The ADAS1127 is a 64-channel, current-to-digital, analog-to-digital converter (ADC). It contains 64 low power, low noise, low input current integrators, simultaneous sample-and-holds, and a high speed, high resolution ADCs with configurable sampling rate and resolutions up to 24 bits.

All converted channel results are output on a single 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 ADAS1127 uses the separate supply IOVDD to reduce the digital noise effect on the conversions.

The ADAS1127 is in a 10 mm × 10 mm, mini-BGA package. For more information on the ADAS1127, contact Analog Devices, Inc, at adas@analog.com.

Applications