AD7091R

• Product introduction

AD7091R 1 MSPS, ULTRALOW POWER, 12-BIT ADC WITH ON-CHIP REFERENCE IN 10-LEAD LFCSP AND MSOP

The AD7091R is a 12-bit successive approximation analog-to-digital converter (ADC) that offers ultralow power consumption (typically 349 µA at 3 V and 1 MSPS) while achieving fast throughput rates (1 MSPS with a 50 MHz SCLK). The AD7091R uses advanced design and process techniques to achieve this very low power dissipation at high throughput rates. The part also features an on-chip, accurate 2.5 V reference.

 

Operating from a single 2.7 V to 5.25 V power supply, the part contains a wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 7 MHz. The AD7091R also features an on-chip conversion clock and high speed serial interface. The conversion process and data acquisition are controlled using a CONVST signal and an internal oscillator.

Product Highlights

Low Power:

• Lowest Power 12-Bit SAR ADC Available
  349 μA typical at 3 V and 1 MSPS
  264 nA typical at 3 V in power-down mode
• Flexible Power/Throughput Rate Management
  Average power scales with the throughput rate
  Power-down mode allows the average power consumption to be reduced for intermittent or one shot conversion scenarios

Precision:

• ±1 LSB max INL

Flexibility:

• Single supply operation with separate VDRIVE pin. The AD7091R operates from a single 2.7 V to 5.25 V supply. The VDRIVE function allows the serial SPI® interface to independently connect directly to 1.8 V to 5 V processors
• On-chip, accurate 2.5 V reference, which can also be overdriven with external 2.7V to 5.25V reference
• Temperature range from −40°C to +125°C spans numerous end markets

Small Package:

• Available in 2mm x 3mm10-lead LFCSP, with alternative pinned MSOP package

Applications

Instrumentation and Measurement

• Battery and USB powered systems
  Data acquisition systems
  Handheld meters
• Field Instruments

Consumer

• Battery powered devices

Communications

• Optical systems
• Mobile communications

Medical

• Battery Operated Medical instruments
  Electrocardiograms and heart rate monitors