AD8295:  Precision Instrumentation Amplifier with Signal Processing Amplifiers

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 ...続きを見る

AD8295:  Precision Instrumentation Amplifier with Signal Processing Amplifiers

製品概要

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

    • 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

    Diagrams

    Functional Block Diagram for AD8295
    Functional Block Diagram for AD8295

    仕様

    Single/Dual Supply Dual
    Voltage Supply (Vmax) +36V
    Gain Setting Method Resistor
    Gain Range (min to max) 1000
    Bandwidth G=10 (kHz typ) 750MHz
    CMRR (dB) 140dB
    Vnoise RTI 1-10 Hz µVp-p 0.25µV p-p
    Temperature Range -40 to +85
    Supply Current (max) 2.3mA
    Package CSP

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    新製品情報のRSSフィードを取得 続きを見る
    Part# Description Single/Dual Supply Vcc-Vee Gain Setting Method Bandwidth G=10 (kHz typ) Gain min. Gain max. Min CMRR @ 60 Hz Min Gain Min CMRR @ 60Hz Max Gain Vnoise RTI 1-10 Hz µVp-p Price* (1000-4999)
    AD522 Diff Amp Dual 10V to 36V Resistor 3 1 1,000 75dB 100dB 4 -
    AD524 Precision IA Dual 12V to 36V Pin 400 1 1,000 70dB 110dB 0.3 $9.52
    AD526 Software Programmable Dual 9V to 33V Software 350 1 16 - - 3 $6.39
    AD620 General Purpose IA Dual 4.6V to 36V Resistor 800 1 10,000 73dB 110dB 0.28 $3.18
    AD621 Precision IA Dual 4.6V to 18V Pin 800 10 100 93dB 110dB 0.28 $4.09
    AD622 Low Cost IA Dual 5.2V to 36V Resistor 800 1 1,000 66dB 103dB 0.3 $2.51
    AD623 S.S R-R IA Single/Dual 2.7V to 12V Resistor 100 1 1,000 70dB 105dB 2 $1.40
    AD624 Precision IA Dual 12V to 36V Pin 400 1 1,000 70dB 110dB 0.3 $11.93
    AD625 Programmable Gain IA Dual 12V to 36V Resistor 400 1 10,000 70dB 110dB 0.3 $8.78
    AD626 Diff Amp Single/Dual 2.4V to 12V Pin 100 10 100 55dB 55dB 2 $3.70
    AD627 Micropower IA Single/Dual 2.2V to 36V Resistor 30 5 1,000 77dB 77dB 1.2 $2.56
    AD628 High CMV DA Single/Dual 4.5V to 36V Pin, Resistor 600 0.1 100 75dB 75dB 15 $1.78
    AD629 High CMV DA Dual 5V to 36V fixed 500 -