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ADA4638-1:  30V Auto-zero, Rail-to-Rail Output Precision Amplifier

Product Details

Product Status:Recommended for New Designs

The ADA4638-1 is a high voltage, high precision, zero-drift amplifier featuring rail-to-rail output swing. It is guaranteed to operate from 4.5 V to 30 V single supply or ±2.25 V to ±15 V dual supplies while consuming less than 0.95 mA of supply current at ±5 V.

With an offset voltage of 4 μV, offset drift less than 0.05 μV/°C, no 1/f noise, and input voltage noise of only 1.2 μV p-p (0.1 Hz to 10 Hz), the ADA4638-1 is suited for high precision applications where large error sources cannot be tolerated. Pressure sensors, medical equipment, and strain gage amplifiers benefit greatly from nearly zero drift over the wide operating temperature range. Many applications can take advantage of the rail-to-rail output swing provided by the ADA4638-1 to maximize the signal-to-noise ratio (SNR).

The ADA4638-1 is specified for the extended industrial (−40°C to +125°C) temperature range and is available in 8-lead LFCSP (3 mm × 3 mm) and SOIC packages.

APPLICATIONS

  • Electronic weigh scale
  • Pressure and position sensors
  • Strain gage amplifiers
  • Medical instrumentation
  • Thermocouple amplifiers

FEATURES and BENEFITS

  • Single Supply Operation:
    4.5 V to 30V
  • Dual supply operation:
    ±2.25 V to ±15 V
  • Low offset voltage:
    4 μV maximum
  • Input offset voltage drift:
    0.05 μV/°C maximum
  • High gain: 130 dB minimum
  • High PSRR: 120 dB minimum
  • High CMRR: 130 dB minimum
  • Input common-mode range includes lower supply rail
  • Rail-to-rail output
  • Low supply current:
    0.95 mA maximum

Pin Configuration Diagram for ADA4638-1

Documentation

Title Content Type File Type
ADA4638-1: 30V Auto-zero, Rail-to-Rail Output Precision Amplifier Data Sheet (Rev 0, 10/2011) (pdf, 176 kB) Data Sheets PDF
AN-1114: Lowest Noise Zero-Drift Amplifier Has 5.6 nV/√Hz Voltage Noise Density  (pdf, 182 kB) Application Notes PDF
Video: Demonstration of the ADIsimOpAmp™ Design Tool Videos HTML
Sensor Signal Conditioning - Amplifiers for Signal Conditioning  (PDF) Design Handbooks PDF
Op Amp Applications Handbook Design Handbooks HTML
MT-055: Chopper Stabilized (Auto-Zero) Precision Op Amps  (pdf, 320 kB) Tutorials PDF
Bridge-Type Sensor Measurements are Enhanced by Autozeroed Instrumentation Amplifiers with Digitally Programmable Gain and Output Offset  (pdf) Analog Dialogue PDF
Demystifying Auto-Zero Amplifiers Analog Dialogue HTML
MS-2062: To Chop or Auto-Zero: That Is the Question.  (pdf, 278 kB) Technical Articles PDF
Demystifying Auto-Zero Amplifiers Part 2
by Eric Nolan and Reza Moghimi (Analog Dialogue, May 2000)
Technical Articles HTML
Demystifying Auto-Zero Amplifiers Part 1
by Eric Nolan (Analog Dialogue, March 2000)
Technical Articles HTML
Glossary of EE Terms Glossary HTML

Design Tools,Models,Drivers & Software

Title Content Type File Type
OpAmp Error Budget Calculator
An online tool to illustrate range, gain and accuracy issues in simple opamp buffers.
Amplifier Error Budget Analysis HTML
Analog Bridge Wizard
The Analog Bridge Wizard recommends amplifiers and ADC's for your bridge application. Find out which op-amp or in-amp is best for your design, and view the error budget analysis for that solution.
ADIsim Design/Simulation Tools HTML
ADA4638-1 SPICE Macro Model SPICE Models 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.

SampleSample & Buy

Price, packaging, availability

ADA4638-1 Model Options
Model Package Pins Temp.
Range
Packing,
Qty
Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
ADA4638-1ACPZ-R7 Status: Production 8 ld LFCSP (3x3mm, 1.6x2.34mm exposed pad 8 Ind Reel, 1500 - $1.28 Y  Material Info PCN Purchase Sample
ADA4638-1ACPZ-RL Status: Production 8 ld LFCSP (3x3mm, 1.6x2.34mm exposed pad 8 Ind Reel, 5000 - $1.28 Y  Material Info PCN Purchase
ADA4638-1ARZ Status: Production 8 ld SOIC 8 Ind Tube, 98 $1.56 $1.28 Y  Material Info Notify Me Purchase Sample
ADA4638-1ARZ-R7 Status: Production 8 ld SOIC 8 Ind Reel, 1000 - $1.28 Y  Material Info Notify Me Purchase
ADA4638-1ARZ-RL Status: Production 8 ld SOIC 8 Ind Reel, 2500 - $1.28 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.

EVAL-OPAMP-1 Evaluation Board
Model Description Price RoHS View PCN/ PDN Check Inventory/
Purchase/Sample
EVAL-PRAOPAMP-1KSZ Status: Production Single KS-5 lead SC70 Evaluation Board $20.19 Yes -
EVAL-PRAOPAMP-1RJZ Status: Production Single RJ-5 lead SOT23 Evaluation Board $20.19 Yes -
EVAL-PRAOPAMP-1RMZ Status: Production Single RM-8 lead MSOP Evaluation Board $20.19 Yes -
EVAL-PRAOPAMP-1RZ Status: Production Single R-8 lead SOIC Evaluation Board $20.19 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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