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AD7912:  2-Channel, 2.35 V to 5.25 V, 1 MSPS, 10-Bit A/D Converter

Product Details


The AD7912/AD7922 are 10-bit and 12-bit, high speed, low power, 2-channel, successive-approximation ADCs respectively. The parts operate from a single 2.35 V to 5.25 V power supply and feature throughput rates up to 1 MSPS. The parts contain a low-noise, wide bandwidth track/hold amplifier, which can handle input frequencies in excess of 6 MHz.

The conversion process and data acquisition are controlled using CS and the serial clock, allowing the devices to interface with microprocessors or DSPs. The input signal is sampled on the falling edge of CS and the conversion is also initiated at this point. There are no pipeline delays associated with the part.

The channel to be converted is selected through the DIN pin and the mode of operation is controlled by CS. The serial data stream from the DOUT pin has a channel identifier bit and a mode identifier bit, which provide information about the channel converted and the current mode of operation.

As a result of the Daisy Chain mode of operation, several AD7912/AD7922 can be connected together in Daisy Chain configuration. The Daisy Chain mode allows the user to read the conversion result from the ADCs contained in the chain.

The AD7912/AD7922 use advanced design techniques to achieve very low power dissipation at high throughput rates.

The reference for the part is taken internally from VDD. This allows the widest dynamic input range to the ADC. Thus the analog input range for the part is 0 to VDD. The conversion rate is determined by the SCLK signal.

FEATURES and BENEFITS

  • Fast Throughput Rate: 1 MSPS
  • Specified for VDD of 2.35 V to 5.25 V
  • Low Power:
    4.8 mW typ at 1 MSPS with 3 V Supplies
    15.5 mW typ at 1 MSPS with 5 V Supplies
  • Wide Input Bandwidth:
    71.5 min dB SNR at 100 kHz Input Frequency
  • Flexible Power/Serial Clock Speed Management
  • No Pipeline Delays
  • High Speed Serial Interface SPI®/QSPI™ /MICROWIRE™ /DSP Compatible
  • Standby Mode: 1 µA max
  • Daisy Chain Mode
  • 8-Lead TSOT Package
  • 8-Lead MSOP Package

Functional Block Diagram for AD7912

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OF NOTE ...

For samples and technical information, please contact the ADC Development Group. Please include your name, company, address and a brief description of your application.

Documentation

Title Content Type File Type
AD7912/AD7922: 2-Channel, 2.35 V to 5.25 V 1MSPS, 10-/12-Bit ADCs Data Sheet  (Rev 0, 04/2004) (pdf, 386 kB) Data Sheets PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
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

Symbols and Footprints— Analog Devices offers Symbols & Footprints which are compatible with a large set of today’s CAD systems for broader and easier support.

Product Recommendations & Reference Designs

Companion Products

Suggested Companion Products


Recommended Input Buffer Amplifiers for the AD7912

  • For low distortion, low noise, dual supplies, we recommend the AD8599.
  • For precision, low noise, low cost, single supply, we recommend the AD8605 family of operational amplifiers.
Recommended Precision References for the AD7912
  • For applications requiring a 3V reference with high output current, we recommend the REF193 or the ADR433.
  • For applications requiring a 2.5V reference, we recommend the REF192 or the ADR421.
Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7912 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7912ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $3.28 $2.78 Y  Material Info PCN Purchase Sample
AD7912ARMZ-REEL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $2.78 Y  Material Info PCN Purchase
AD7912ARMZ-REEL7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $2.78 Y  Material Info PCN Purchase
AD7912AUJZ-REEL Status: Last Time Buy 8 ld TSOT 8 Ind Reel, 10000 - $2.78 Y  Material Info PCN/PDN Purchase
AD7912AUJZ-REEL7 Status: Production 8 ld TSOT 8 Ind Reel, 3000 - $2.78 Y  Material Info PCN 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.

AD7912 Evaluation kit
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-AD7912CBZ 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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