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AD8295:  Precision Instrumentation Amplifier with Signal Processing Amplifiers

Product Details

Product Status:Recommended for New Designs

The AD8295 contains all the components necessary for a precision instrumentation amplifier front end in one small 4 mm × 4 mm package. It contains a high performance instrumentation amplifier, two general-purpose operational amplifiers, and two precisely matched 10 kΩ resistors.

The AD8295 has been designed to make PCB routing easy and efficient. The AD8295 components are arranged in a logical way so that typical application circuits have short routes and few vias. Unlike most chip scale packages, the AD8295 does not have an exposed metal pad on the back of the part, which frees up additional space for routing and vias. The AD8295 comes in a 4 mm × 4 mm LFCSP that requires half the board space of an 8-pin SOIC package.

The AD8295 includes a high performance, programmable gain instrumentation amplifier. Gain is set from 1 to 1000 with a single resistor. The low noise and excellent common-mode rejection of the AD8295 enable the part to easily detect small signals even in the presence of large common-mode interference. For a similar instrumentation amplifier without the associated signal conditioning circuitry, see the AD8221 or AD8222 data sheet.

The AD8295 operates on both single and dual supplies and is well suited for applications where ±10 V input voltages are encountered. Performance is specified over the entire industrial temperature range of −40°C to +85°C for all grades. The AD8295 is operational from −40°C to +125°C; see the Typical Performance Characteristics section for expected operation up to 125°C.

Applications

  • Industrial process controls
  • Wheatstone bridges
  • Precision data acquisition systems
  • Medical instrumentation
  • Strain gauges
  • Transducer interfaces
  • Differential output
  • Data Sheet, Rev 0, 11/2008

    FEATURES and BENEFITS

    • Saves board space
    • Includes precision in-amp, 2 op amps, and 2 matched resistors
    • 4 mm × 4 mm LFCSP
    • No heat slug for more routing room
    • Differential output fully specified
    • Wide power supply range: ±2.3 V to ±18 V
    • In amp specifications:
      Gain set with 1 external resistor (gain range: 1 to 1000)
      8 nV/√Hz, @ 1 kHz, max input voltage noise
      90 dB min CMRR (G = 1)
      0.8 nA max input bias current
      1.2 MHz, −3 dB bandwidth (G = 1)
      2 V/µs slew rate
    • 1 ppm/°C, 0.03% resistor matching

    Functional Block Diagram for AD8295

    Additional Information

    For additional ADI Healthcare Products and related information, please visit www.analog.com/healthcare.

    Documentation

    Title Content Type File Type
    AD8295: Precision Instrumentation Amplifierwith Signal Processing Amplifiers Data Sheet (Rev A, 06/2009) (pdf, 741 kB) Data Sheets PDF
    CN-0225: High Impedance, High CMR, ±10 V Analog Front End Signal Conditioner for Industrial Process Control and Automation  (pdf, 640 kB) Circuit Note PDF
    A Designer's Guide to Instrumentation Amplifiers (3rd Edition) Design Handbooks HTML
    High-performance Adder Uses Instrumentation Amplifiers
    Make an adder circuit using instrumentation amplifiers to increase input impedance.
    (EDN, 9/3/2009)
    Technical Articles HTML
    RAQs index Rarely Asked Questions HTML
    Glossary of EE Terms Glossary HTML

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    Price, packaging, availability

    AD8295 Model Options
    Model Package Pins Temp.
    Range
    Packing,
    Qty
    Price*(100-499) Price*1000 pcs RoHS View PCN/ PDN Check Inventory/
    Purchase/Sample
    AD8295ACPZ-R7 Status: Production 16 ld LFCSP (4x4x.85mm, no exposed pad) 16 Ind Reel, 1500 $2.40 $2.03 Y  Material Info PCN Purchase Sample
    AD8295ACPZ-RL Status: Production 16 ld LFCSP (4x4x.85mm, no exposed pad) 16 Ind Reel, 5000 $2.40 $2.03 Y  Material Info PCN Purchase
    AD8295ACPZ-WP Status: Production 16 ld LFCSP (4x4x.85mm, no exposed pad) 16 Ind Tray, 64 $2.40 $2.03 Y  Material Info PCN Purchase
    AD8295BCPZ-R7 Status: Production 16 ld LFCSP (4x4x.85mm, no exposed pad) 16 Ind Reel, 1500 $4.62 $3.92 Y  Material Info PCN Purchase Sample
    AD8295BCPZ-RL Status: Production 16 ld LFCSP (4x4x.85mm, no exposed pad) 16 Ind Reel, 5000 $4.62 $3.92 Y  Material Info PCN Purchase
    AD8295BCPZ-WP Status: Production 16 ld LFCSP (4x4x.85mm, no exposed pad) 16 Ind Tray, 64 $4.62 $3.92 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.


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