GENERAL DESCRIPTION

The AD7091R-5 is a 12-bit, multichannel, ultra low power, successive approximation analog-to-digital converter (ADC). The AD7091R-5 operates from a single 2.7 V to 5.25 V power supply and typically consumes only 24 µA at a 3 V supply in fast mode.

FEATURES

I2C-compatible serial interface supports standard and

fast modes

Ultra low power: 90 µW typical at 3 V in fast mode

Specified for VDD of 2.7 V to 5.25 V

On-chip accurate 2.5 V reference, 5 ppm/°C typical drift

4 single-ended analog input channels

ALERT function

BUSY function

Autocycle mode

Wide input bandwidth

68 dB signal-to-noise ratio (SNR) typical at input

frequency of 1 kHz

Flexible power/throughput rate management

No pipeline delays

Power-down mode

550 nA typical at VDD = 5.25 V

435 nA typical at VDD = 3 V

20-lead LFCSP and TSSOP packages

Temperature range: −40°C to +125°C

APPLICATIONS

Battery-powered systems

Personal digital assistants

Medical instruments

Mobile communications

Instrumentation and control systems

Data acquisition systems

Optical sensors

Diagnostic/monitoring functions