AD7091:  1 MSPS, Ultralow Power 12-Bit ADC in 8-Lead LFCSP

The AD7091 is a 12-bit successive approximation register analog-to-digital converter (SAR ADC) that offers ultralow 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.

Product Highlights

1. Lowest power 12-bit SAR ADC available.
2. High Throughput Rate with Ultralow Power Consumption.
3. Flexible Power/Throughput Rate Management. Average power scales with the throughput rate. Power-down mode allows the average power consumption to be reduced when the device is not performing a conversion.
4. Reference Derived from the Power Supply.
5. Single Supply Operation.

Applications

• Battery-powered systems
   Handheld meters
   Medical instruments
   Mobile communications
• Instrumentation and control systems
• Data acquisition systems
• Optical sensors
• Diagnostic/monitoring functions
• Energy harvesting