AD7091 SAR Analog-to-Digital Converter

ADI's AD7091 is a 12-bit successive approximation register analog-to-digital converter (SAR ADC) that offers ultra-low power consumption (typically 367 μA at 3 V and 1 MSPS) while achieving fast throughput rates (1 MSPS with a 50 MHz SCLK). The AD7091 operates from a single 2.09 V to 5.25 V power supply. The AD7091 also features an on-chip conversion clock and a high-speed serial interface.

The conversion process and data acquisition are controlled using a CONVST signal and an internal oscillator. The AD7091 has a serial interface that allows data to be read after the conversion while achieving a 1 MSPS throughput rate. The AD7091 uses advanced design and process techniques to achieve very-low power dissipation at high-throughput rates.

The reference is derived internally from V_DD. This design allows the widest dynamic input range to the ADC; that is, the analog input range for the AD7091 is from 0 V to V_DD. The AD7091 comes in a 8 pin LFCSP package and has an operating temperature range of -40°C to +125°C. It was designed for battery powered systems found in mobile, meters, and test equipment.