Features and Benefits

  • I2C-compatible serial interface supports standard and fast modes
  • Ultralow 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

Product Details

The AD7091R-5 is a 12-bit, multichannel, ultralow 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. 

The AD7091R-5 provides a 2-wire serial interface compatible with I2C interfaces. The conversion process can be controlled by a sample mode via the CONVST pin, an autocycle mode selected through software control, or a command mode in which conversions occur across I2C write operations.

The device contains a wide bandwidth track-and-hold amplifier that can handle input frequencies up to 1.5 MHz. The AD7091R-5 also features an on-chip conversion clock, an on-chip accurate 2.5 V reference, and a programmable out-of-bounds user alert function.

The AD7091R-5 offers four single-ended analog input channels with a channel sequencer that allows a preprogrammed selection of channels to be converted sequentially.

The AD7091R-5 uses advanced design techniques to achieve ultralow power dissipation without compromising performance. It also features flexible power management options. An on-chip configuration register allows the user to set up different operating conditions. These include power management, alert functionality, busy indication, channel sequencing, and general-purpose output pins. The MUXOUT and ADCIN pins allow signal conditioning of the multiplexer output before acquisition by the ADC.


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

Product Lifecycle icon-recommended Production

At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.