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AD7994:  4 Channel, 12-Bit ADC with I2C Compatible Interface in 16-Lead TSSOP

Product Details


The AD7994 is a 4 channel, 12-bit, high speed, low power, successive-approximation ADC. The part operates from a single 2.7 V to 5.5 V power supply and features a conversion time of 2 µs. The part contains a four channel multiplexer and track/hold amplifier.

The AD7994 provides a two-wire serial interface which is compatible with I2C interfaces. The part comes in two versions, AD7994-0 and AD7994-1. Each version allows for a minimum of two different I2C addresses. The I2C interface on the AD7994-0 supports Standard and Fast I2C Interface Modes. The I2C interface on the AD7994-1 supports Standard, Fast and two High-Speed I2C Interface Modes.

FEATURES and BENEFITS

  • 12-Bit ADC with Fast Conversion Time: 2 µs
  • Four Single-Ended Analog Input Channels
  • Specified for VDD of 2.7 V to 5.5 V
  • Low Power Consumption
  • Fast Throughput Rate: - 188 kSPS
  • Sequencer Operation
  • Automatic Cycle Mode
  • I2C® Compatible Serial Interface
  • I2C® Interface supports:
    Standard, Fast, and High-Speed Modes
  • Out of Range Indicator
  • Pin-Selectable Addressing via AS
  • Automatic Shutdown Mode: - 1 µA max

Functional Block Diagram for AD7994

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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
AD7994/AD7993: Errata Sheet (Rev A, 02/2003) (pdf, 52 kB) Data Sheets PDF
AD7993/AD7994: 4-Channel, 12-/10-Bit ADCs with I2C Compatible Interface in 16-Lead TSSOP Data Sheet  (Rev 0, 10/2004) (pdf, 1073 kB) Data Sheets PDF
AN-931: Understanding PulSAR ADC Support Circuitry  (pdf, 299 kB)
This application note discusses in general the pitfalls that occur regularly when using SAR ADCs and, more importantly, how to easily prevent them.
Application Notes PDF
AN-686: Implementing an I2C® Reset  (pdf, 44 kB) Application Notes PDF
MS-2210: Designing Power Supplies for High Speed ADC  (pdf, 327 kB) Technical Articles PDF
8- to 18-Bit SAR ADCs ... From the Leader in High Performance Analog  (pdf, 1885 kB)
8- to 18-Bit SAR ADCs with Sample Rates up to 3 MSPS -- The latest additions to ADI’s ADC portfolio offer unrivaled functionality in terms of channel count and power supply voltage, optimal power/speed ratios, and the smallest packages to meet the demands of any data acquisition application, including portable, industrial, medical, wireless, and communications.
Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD7998 IIO ADC Linux Driver (Wiki Site) Device Drivers 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 AD7994

  • For low distortion, low noise, dual supplies, we recommend the AD8599.
  • For precision, low noise, single supply, we recommend the AD8605 family of operational amplifiers.
  • For single supply, high speed, low power, we suggest the AD8031 or the dual AD8032.
  • For precision, high speed, low cost, we recommend the quad AD8604.
Recommended External References - 2.5V for the AD7994
  • For applications requiring best accuracy, low noise, low drift, we recommend the ADR421 or AD780.
  • For low noise, high output current applications, we recommend the ADR431.
  • For wide supply applications, we recommend the ADR03 or AD780.
  • For the reference buffer amplifier, we recommend the AD8605.

  • For applications requiring 2.048V to 4.096V, we recommend the REF191 reference family.
Recommended Digital Isolators for the AD7994 Recommended Power Solutions
  • For selecting voltage regulator products, use ADIsimPower.

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Price, packaging, availability

AD7994 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD7994BRU-0 Status: Production 16 ld TSSOP 16 Ind Tube, 96 $4.46 $3.80 N  Material Info PCN Purchase
AD7994BRU-0REEL Status: Production 16 ld TSSOP 16 Ind Reel, 2500 - $3.80 N  Material Info PCN Purchase
AD7994BRUZ-0 Status: Production 16 ld TSSOP 16 Ind Tube, 96 $3.87 $3.29 Y  Material Info PCN Purchase Sample
AD7994BRUZ-0REEL Status: Production 16 ld TSSOP 16 Ind Reel, 2500 - $3.29 Y  Material Info PCN Purchase
AD7994BRUZ-1 Status: Production 16 ld TSSOP 16 Ind Tube, 96 $4.17 $3.54 Y  Material Info PCN Purchase Sample
AD7994BRUZ-1REEL Status: Production 16 ld TSSOP 16 Ind Reel, 2500 - $3.54 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.

AD7994 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-AD7994EBZ Status: Production Evaluation Board $59.00 Yes -

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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