Analog Devices Inc. AD7091R-2/-4/-8 Ultralow Power 12-Bit ADCs

Analog Devices Inc. AD7091R-2/AD7091R-4/AD7091R-8 Ultralow Power 12-Bit ADCs feature multichannel 12-bit, ultralow power, successive approximation analog-to-converters (ADC) available in two, four, or eight analog input channel options. The AD7091R-2/AD7091R-4/AD7091R-8 operate from a single 2.7V to 5.25V power supply and can achieve a sampling rate of 1 mega samples per second (MSPS). The AD7091R-2/ AD7091R-4/AD7091R-8 contain a wide bandwidth track-and-hold amplifier that can handle input frequencies in excess of 1.5 MHz. The AD7091R-2/AD7091R-4/AD7091R-8 also feature an on-chip conversion clock, an on-chip accurate 2.5V reference, and a high speed serial interface.


  • Fast throughput rate of 1MSPS
  • Specified for VDD of 2.7V to 5.25V
  • Ultralow power: 467μA typical at 3V and 1 MSPS
  • 2, 4, and 8 single-ended analog input channels
  • Programmable channel sequencer
  • ALERT function available in 4- and 8-channel versions
  • BUSY indication available in 4- and 8-channel versions
  • GPOx pins available in 4- and 8-channel versions
  • Wide input bandwidth
    • 70dB signal-to-noise ratio (SNR) typical at input frequency of 10kHz
  • Flexible power/throughput rate management
  • No pipeline delays
  • High speed serial interface
    • SPI/QSPI™/MICROWIRE™/DSP compatible
  • Daisy-chain mode
  • Power-down mode
    • 550nA typical at VDD = 5.25V
    • 435nA typical at VDD = 3V
  • 16-lead, 20-lead, and 24-lead TSSOP packages
  • Temperature range: −40°C to +125°C


  • Battery-powered systems
  • Personal digital assistants
  • Medical instruments
  • Mobile communications
  • Instrumentation and control systems
  • Data acquisition systems
  • Optical sensors
  • Diagnostic/monitoring functions

Functional Block Diagram

Analog Devices Inc. AD7091R-2/-4/-8 Ultralow Power 12-Bit ADCs
Published: 2014-04-08 | Updated: 2022-03-11