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AD8214:  Fast Response, High Voltage, Current Shunt Comparator

Product Details

Product Status:Recommended for New Designs

The AD8214 is a fast response, high common-mode voltage, current shunt comparator. The device operates on the high side rail of any DC current sensing application, provided the voltage is between 5 V and 65 V. Internally, the AD8214 features a fast comparator that is optimized for high side operation. An internal Zener regulator powers the circuit with respect to the high side DC rail. In addition, user access to this 2.4V regulator, allows for setting a comparator threshold voltage via external resistors. The AD8214 will compare the voltage across the shunt resistor to this user-selected threshold, and the AD8214 output will change states from low to high, indicating the current across the shunt has crossed the threshold level.

The input to output response time of the AD8214 is typically less than 100 ns. This makes the device optimal for overcurrent protection in applications such as motor and solenoid control. Built-in comparator hysteresis means that once the current across the shunt falls back to a normal limit, the AD8214 output will change states to its original level.

The AD8214 is available in an 8-lead MSOP package. The operating temperature range is −40°C to +125°C, and the device is fully qualified for automotive applications.

APPLICATIONS
Overcurrent protection

  • Motor controls
  • Transmission controls
  • Diesel injection controls
  • DC-to-DC converters
  • Power supplies
  • Batteries

FEATURES and BENEFITS

  • Input-to-output response:
    <100 ns
  • High input common-mode voltage range
    Operating: 5 V to 65 V
    Survival: 0 V to 68 V
  • Current output
  • Hysteresis: 10 mV
  • Integrated 2.4 V regulator
  • Wide operating temperature range:
    -40°C to +125°C
  • 8-lead MSOP package
  • Qualified for automotive applications

Functional Block Diagram for AD8214

Documentation

Title Content Type File Type
AD8214: Fast Response, High Voltage Current Shunt Comparator Datasheet (Rev A, 06/2012) (pdf, 404 kB) Data Sheets PDF
AN-669: Effectively Applying the AD628 Precision Gain Block  (pdf, 193 kB) Application Notes PDF
A Designer's Guide to Instrumentation Amplifiers (3rd Edition) Design Handbooks HTML
Auto-Zero Amplifiers  (doc, 75 kB)
A wide variety of electronic applications, especially those involving very small input signals, require signal paths with very low offset voltage and offset voltage drift over time and temperature.
Technical Articles DOC
High-performance Adder Uses Instrumentation Amplifiers
Make an adder circuit using instrumentation amplifiers to increase input impedance.
(EDN, 9/3/2009)
Technical Articles HTML
Brochure: Monitor and Control Solutions for Communications Systems Overview HTML
Power System Management (Spring 2007)  (pdf, 1170 kB) Overview PDF
RAQs index Rarely Asked Questions HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
AD8214 SPICE Macro Model SPICE Models HTML

Evaluation Kits & Symbols & Footprints

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.

SampleSample & Buy

Price, packaging, availability

AD8214 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
AD8214ARMZ Status: Production 8 ld MSOP 8 Ind Tube, 50 $0.79 $0.76 Y  Material Info Notify Me Purchase Sample
AD8214ARMZ-R7 Status: Production 8 ld MSOP 8 Ind Reel, 1000 - $0.76 Y  Material Info Notify Me Purchase
AD8214ARMZ-RL Status: Production 8 ld MSOP 8 Ind Reel, 3000 - $0.76 Y  Material Info Notify Me Purchase
AD8214WYRMZ Status: Production 8 ld MSOP 8 Auto Tube, 50 $0.91 $0.87 Y  Material Info Notify Me Purchase Sample
AD8214WYRMZ-R7 Status: Production 8 ld MSOP 8 Auto Reel, 1000 - $0.87 Y  Material Info Notify Me Purchase
AD8214WYRMZ-RL Status: Production 8 ld MSOP 8 Auto Reel, 3000 - $0.87 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.


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