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AD7887:  2.7 V to 5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead MSOP

Product Details


The AD7887 is a high speed, low power, 12-bit analog-to-digital converter (ADC) that operates from a single 2.7 V to 5.25 V power supply. The AD7887 is capable of 125 kSPS throughput rate. The input track-and-hold acquires a signal in 500 ns and features a single-ended sampling scheme. The output coding for the AD7887 is straight binary, and the part is capable of converting full power signals of up to 2.5 MHz.

The AD7887 can be configured for either dual- or single-channel operation via the on-chip control register. There is a default single-channel mode that allows the AD7887 to be operated as a read-only ADC. In single-channel operation, there is one analog input (AIN0) and the AIN1/VREF pin assumes its VREF function. This VREF pin allows the user access to the part’s internal 2.5 V reference, or the VREF pin can be overdriven by an external reference to provide the reference voltage for the part. This external reference voltage has a range of 2.5 V to VDD. The analog input range on AIN0 is 0 to VREF.

In dual-channel operation, the AIN1/VREF pin assumes its AIN1 function, providing a second analog input channel. In this case, the reference voltage for the part is provided via the VDD pin. As a result, the input voltage range on both the AIN0 and AIN1 inputs is 0 to VDD.

CMOS construction ensures low power dissipation of typically 2 mW for normal operation and 3 μW in power-down mode. The part is available in an 8-lead, 0.15-inch-wide narrow body SOIC and an 8-lead MSOP package.

Product Highlights
  1. Smallest 12-bit dual-/single-channel ADC; 8-lead MSOP package.
  2. Lowest power 12-bit dual-/single-channel ADC.
  3. Flexible power management options, including automatic power-down after conversion.
  4. Read-only ADC capability.
  5. Analog input range from 0 V to VREF.
  6. Versatile serial input/output port (SPI/QSPI/MICROWIRE/ DSP compatible).

Applications
  • Battery-powered systems (personal digital assistants, medical instruments, mobile communications)
  • Instrumentation and control systems
  • High speed modems
  • FEATURES and BENEFITS

    • Specified for VDD of 2.7 V to 5.25 V
    • Flexible power/throughput rate management
    • Shutdown mode: 1 μA max
    • One or two single-ended inputs
    • Serial interface: SPI®/QSPI™/MICROWIRE™/DSP compatible
    • 8-lead narrow SOIC and MSOP packages

    AD7887 Functional Block Diagram

    Documentation

    Title Content Type File Type
    AD7887: 2.7 V to 5.25 V, Micropower, 2-Channel, 125 kSPS, 12-Bit ADC in 8-Lead MSOP Data Sheet  (Rev D, 02/2009) (pdf, 452 kB) Data Sheets PDF
    CN-0189: Tilt Measurement Using a Dual Axis Accelerometer  (pdf, 285 kB) Circuit Note PDF
    CN-0150: Software Calibrated, 1 MHz to 8 GHz, 70 dB RF Power Measurement System Using the AD8318 Logarithmic Detector  (pdf, 250 kB) Circuit Note PDF
    MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
    Finding the Needle in a Haystack: Measuring small differential voltages in the presence of large common-mode voltages
    (Analog Dialogue, Vol. 34, No. 1, January-February, 2000)
    Analog Dialogue HTML
    How to Save Power in Battery Applications Using the Power-Down Mode in an ADC
    by Mercedes Casamayor and Claire Croke, Analog Devices, Inc. (Analog Dialogue, Vol. 37, 9/2003)
    Analog Dialogue HTML
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

    Evaluation Kits & Symbols & Footprints

    Evaluation Boards & KitsView the Evaluation Boards and Kits page for documentation and purchasing

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    Price, packaging, availability

    AD7887 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    AD7887AR Status: Production 8 ld SOIC 8 Ind Tube, 98 $4.39 $3.57 N  Material Info PCN Purchase
    AD7887AR-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $3.57 N  Material Info PCN Purchase
    AD7887ARM Status: Production 8 ld MSOP 8 Ind Tube, 50 $4.61 $3.75 N  Material Info PCN Purchase
    AD7887ARM-REEL7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $3.75 N  Material Info PCN Purchase
    AD7887ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $3.80 $3.09 Y  Material Info PCN Purchase Sample
    AD7887ARMZ-REEL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $3.09 Y  Material Info PCN Purchase
    AD7887ARMZ-REEL7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $3.09 Y  Material Info PCN Purchase
    AD7887ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $3.99 $3.24 Y  Material Info PCN Purchase
    AD7887ARZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $3.24 Y  Material Info PCN Purchase
    AD7887BR Status: Production 8 ld SOIC 8 Ind Tube, 98 $5.76 $4.79 N  Material Info PCN Purchase
    AD7887BR-REEL Status: Last Time Buy 8 ld SOIC 8 Ind Reel, 2500 - $4.79 N  Material Info PCN/PDN Purchase
    AD7887BR-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $4.79 N  Material Info PCN Purchase
    AD7887BRZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $5.00 $4.15 Y  Material Info PCN Purchase
    AD7887BRZ-REEL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $4.15 Y  Material Info PCN Purchase
    AD7887BRZ-REEL7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $4.15 Y  Material Info PCN Purchase
    AD7887WARMZ Status: Production 8 ld SOIC 8 Ind Tube, 50 $4.56 $3.71 Y  Material Info PCN Purchase
    AD7887WARMZ-RL Status: Production MICRO SOIC 8 Ind Reel, 3000 - $3.71 Y  Material Info Notify Me Purchase
    Price Table Help

    The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.

    AD7887 Evaluation kit
    Model Description Price RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    EVAL-AD7887CBZ Status: Last Time Buy Evaluation Board - Yes - Contact ADI

    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.

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