GENERAL DESCRIPTION

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). 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, accurate reference, and high speed serial interface.

FEATURES

Fast throughput rate of 1 MSPS

Specified for VDD of 2.7 V to 5.25 V

Logic voltage VDRIVE of 1.65 V to 5.25 V

INL of ±1 LSB maximum

Analog input range of 0 V to VREF

Ultralow power

349 µA typical at 3 V and 1 MSPS

264 nA typical at 3 V in power-down mode

Internal 2.5 V reference, ±4.5 ppm/°C typical drift

Wide input bandwidth

Flexible power/throughput rate management

High speed serial interface

SPI®/QSPI™/MICROWIRE™/DSP compatible

BUSY indicator

Power-down mode

10-lead, 3 mm × 2 mm LFCSP and 10-lead MSOP packages

Temperature range of −40°C to +125°C

APPLICATIONS

Battery-powered systems

Handheld meters

Medical instruments

Mobile communications

Instrumentation and control systems

Data acquisition systems

Optical sensors

Diagnostic/monitoring functions

Energy harvesting