The ADS8900B, ADS8902B, and ADS8904B (ADS890xB) belong to a family of
pin-to-pin compatible, high-speed, high-precision successive-approximation-register (SAR)
analog-to-digital convertors (ADCs) with an integrated reference buffer and integrated low-dropout
regulator (LDO). These devices support unipolar, fully differential, analog input signals with
±1-ppm INL and 104.5-dB SNR specifications under typical operating conditions.
The integrated LDO enables single-supply operation with low power consumption. The
integrated reference buffer supports burst-mode data acquisition with 20-bit precision for the first sample.
External reference voltages in the range 2.5 V to 5 V are supported, offering a wide selection of
input ranges without additional input scaling.
The integrated multiSPI digital interface is backward-compatible to the traditional SPI
protocol. Additionally, configurable features simplify board layout, timing, and firmware, and
support high throughput at lower clock speeds. The multiSPI digital interface allows for easy
interface with a variety of microcontrollers, digital signal processors (DSPs), and
field-programmable gate arrays (FPGAs).
The ADS890xB family is offered in a
space-saving, 4-mm × 4-mm, VQFN package, and is specified over the extended temperature range of –40°C to
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