The AD7091R is a 12-bit successive approximation analog-to-digitalconverter (ADC) that offers ultralow power consumption(typically 349 µA at 3 V and 1 MSPS) while achieving fastthroughput rates (1 MSPS with a 50 MHz SCLK). Operatingfrom a single 2.7 V to 5.25 V power supply, the part contains awide bandwidth track-and-hold amplifier that can handle inputfrequencies in excess of 7 MHz. The AD7091R also features anon-chip conversion clock, accurate reference, and high speedserial interface.

The conversion process and data acquisition are controlled usinga CONVST signal and an internal oscillator. The AD7091R hasa serial interface that allows data to be read after the conversionwhile achieving a 1 MSPS throughput rate.

The AD7091R uses advanced design and process techniques toachieve very low power dissipation at high throughput rates. Anon-chip, accurate 2.5 V reference is available

Product Highlights

1. Lowest Power 12-Bit SAR ADC Available.
2. On-Chip, Accurate 2.5 V Reference.
3. High Throughput Rate with Ultralow Power Consumption.
4. 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.
5. Single Supply Operation with V_DRIVE Function. The AD7091R operates from a single 2.7 V to 5.25 V supply. The V_DRIVE function allows the serial interface to connect directly to 1.8 V to 3.3 V processors.

Applications

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

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.