AD7091R-5 4-Channel, I2C, Ultralow Power 12-Bit ADC in 20-Lead LFCSP/TSSOP

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

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.

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
  • 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
  • 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
  • Analog to Digital Converters
    IBIS Models
    Reference Designs
    Data Sheets
    Documentnote
    AD7091R-5: 4-Channel, I2C, Ultralow Power, 12-Bit ADC in 20-Lead LFCSP/TSSOP Data Sheet (Rev. 0)PDF 692.35 K
    User Guides
    Documentnote
    UG-667: Evaluating the EVAL-AD7091R-5SDZ 12-Bit Monitor and Control SystemPDF 1.31 M
    Order Information
    Part NumberPackagePacking QtyTemp RangePrice 100-499Price 1000+RoHS
    AD7091R-5BCPZ Production20 ld LFCSP (4x4mm 2.5EP)OTH 4902.482.1Y
    AD7091R-5BCPZ-RL7 Production20 ld LFCSP (4x4mm 2.5EP)REEL 150002.1Y
    AD7091R-5BRUZ Production20 ld TSSOPOTH 752.912.47Y
    AD7091R-5BRUZ-RL7 Production20 ld TSSOPREEL 100002.47Y
    Evaluation Boards
    Part NumberDescriptionPriceRoHS
    EVAL-AD7091R-5SDZEvaluation Board99Y
    EVAL-SDP-CB1ZEvaluation Controller Board SDP99Y
    AD7091R-5: 4-Channel, I2C, Ultralow Power, 12-Bit ADC in 20-Lead LFCSP/TSSOP Data Sheet (Rev. 0) ad7091r-5
    AD7091R-5 IBIS Model ad7091r-5
    CN0372 Design & Integration Files adp1607
    UG-667: Evaluating the EVAL-AD7091R-5SDZ 12-Bit Monitor and Control System ad7091r-5