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AD8274:  Very Low Distortion, Precision Difference Amplifier

The AD8274 is a difference amplifier that delivers excellent ac and dc performance. Built on Analog Devices, Inc., proprietary iPolar® process and laser-trimmed resistors, AD8274 achieves a breakthrough in distortion vs. current consumption and has excellent gain drift, gain accuracy, and CMRR.

Distortion in the audio band is an extremely low 0.00025% (112 dB) at a gain of ½ and ...More

AD8274:  Very Low Distortion, Precision Difference Amplifier

Product Description

The AD8274 is a difference amplifier that delivers excellent ac and dc performance. Built on Analog Devices, Inc., proprietary iPolar® process and laser-trimmed resistors, AD8274 achieves a breakthrough in distortion vs. current consumption and has excellent gain drift, gain accuracy, and CMRR.

Distortion in the audio band is an extremely low 0.00025% (112 dB) at a gain of ½ and 0.00035% (109 dB) at a gain of 2 while driving a 600 Ω load

With supply voltages up to ±18 V (+36 V single supply), the AD8274 is well suited for measuring large industrial signals. Additionally, the part’s resistor divider architecture allows it to measure voltages beyond the supplies.

With no external components, the AD8274 can be configured as a G = ½ or G = 2 difference amplifier. For single-ended applications that need high gain stability or low distortion performance, the AD8274 can also be configured for several gains ranging from −2 to +3.

The excellent distortion and dc performance of the AD8274, along with its high slew rate and bandwidth, make it an excellent ADC driver. Because of the part’s high output drive, it also makes a very good cable driver.

The AD8274 only requires 2.6 mA maximum supply current. It is specified over the industrial temperature range of −40°C to +85°C and is fully RoHS compliant. For the dual version, see the AD8273 data sheet.

Applications

  • ADC driver
  • High performance audio
  • Instrumentation amplifier building blocks
  • Level translators
  • Automatic test equipment
  • Sine/cosine encoders

RESOURCES & TOOLS

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  • Very low distortion
    0.00025% THD + N ( 20 kHz)
    0.0015% THD + N (100 kHz)
    Drives 600 Ω loads
  • Excellent gain accuracy
    0.03% maximum gain error
    2 ppm/°C maximum gain drift
    Gains of ½ or 2
  • AC specifications
    20 V/µs minimum slew rate
    800 ns to 0.01% settling time
  • High accuracy dc performance
    83 dB minimum CMRR
    700 µV maximum offset voltage
  • 8-lead SOIC and MSOP packages
  • Supply current: 2.6 mA maximum
  • Supply range: ±2.5 V to ±18 V
  • Single/Dual Supply: Dual
  • Voltage Supply (Vmax) : +36V
  • Gain Range (min to max): 2
  • Bandwidth G=10 (kHz typ): 10000kHz
  • CMRR (dB): 77dB
  • Temperature Range: -40 to +85
  • Gain Error (%) max: +0.03%
  • Supply Current : 2.6mA
  • Package: MSOP,SOIC
  • Vosi (µV): 700µV

AD8274 Functional Block Diagram

Circuits from the Lab

Find more at our Circuits Library.

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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 30 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 Digital 350 1 16 - - 3 $6.39
AD620 General Purpose IA Dual 4.6V to 36V Resistor 800 1 10,000 73dB 110dB 0.28 $3.31
AD621 Precision IA Dual 4.6V to 36V 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 150 1 1,000 70dB 110dB 0.3 $15.87
AD625 Programmable Gain IA Dual 12V to 36V Resistor 400 1 10,000 70dB 110dB 0.3 $8.78
AD626 Diff Amp Single/Dual 4.8V 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 0.56 $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 1 1 77dB 77dB 15 $2.84
AD8129 Low Cost Diff Amp Single/Dual 4.5V to 25V Resistor 200000 10 - 94dB - - $1.57
AD8202 High CMV DA Single 3.5V to 12V fixed 50 - - 82dB 82dB 10 $1.51
AD8203 High CMV DA Single 3.5V to 12V fixed 60 - - 82dB 82dB 10 $1.37
AD8205 S.S Diff Amp Single 4.5V to 5.5V fixed 50 - - 78dB 78dB 20 $1.51
AD8206 S.S Diff Amp Single 4.5V to 5.5V fixed 100 - - 76dB 76dB 20 $1.37
AD8210 Bi-Directional Shunt Mon Single 4.5V to 5.5V fixed 500 20 20 100dB 100dB 7 $1.81
AD8211 High CMV Shunt Mon Single 4.5V to 5.5V fixed 500 20 20 100dB 100dB 7 $0.81
AD8212 High CMV Shunt Mon Single 7V to 65V Resistor 1000 1 1,000 100dB 100dB 1.1 $0.93
AD8213 Dual High CMV Shunt Mon Single 4.5V to 5.5V fixed 500 20 20 100dB 100dB 7 $2.01
AD8214 High CMV Threshold Detec Single 5V to 65V Resistor - 1 100 80dB 80dB 2.2 $0.76
AD8215 High CMV Shunt Mon Single 4.5V to 5.5V fixed 450 20 20 100dB 100dB 7 $1.21
AD8216 High BW 65 V Diff Amp Single 4.5V to 5.5V fixed 3000 3 3 80dB 80dB 20 $1.62
AD8220 R-R JFET IA Single/Dual 4.6V to 36V Resistor 800 1 1,000 78dB 94dB 0.8 $2.32
AD8221 High Performance IA Dual 4.6V to 36V Resistor 562 1 1,000 80dB 130dB 0.25 $2.01
AD8222 Dual High Performance IA Dual - to - Resistor 750 1 1,000 80dB 130dB 0.25 $3.63
AD8223 S.S R-R IA Single/Dual 3V to 24V Pin 125 5 1,000 80dB 90dB 0.6 $1.05
AD8224 Dual JFET R-R IA Single/Dual 4.6V to 36V Resistor 800 1 1,000 78dB 94dB 0.8 $4.17
AD8225 Fixed G=5 IA Dual 3.4V to 36V fixed 900 - - 86dB 86dB 1.5 $3.29
AD8226 Wide Supply R-R out IA Single/Dual 2.2V to 36V Resistor 200 5 1,000 80dB 105dB 2 $1.40
AD8227 Wide Supply R-R out IA Single/Dual 2.2V to 36V Resistor 200 5 1,000 90dB 105dB 0.5 $1.38
AD8228 Precision IA Dual 4.6V to 36V Pin 650 10 100 100dB 120dB 0.5 $3.03
AD8230 Zero Drift IA Single/Dual 8V to 16V Resistor 2 2 1,000 - 110dB 3 $2.99
AD8231 Zero Drift Software Prog Single 3V to 6V Digital, Pin, Software 700 1 128 80dB 110dB 0.7 $1.71
AD8236 - Single 1.8V to 5.5V Resistor 9 - - 94dB 110dB 4 $0.99
AD8250 Software Programmable Dual 10V to 34V Digital, Pin 3000 1 10 80dB 98dB 1 $5.01
AD8251 Software Programmable Dual 10V to 34V Digital, Pin 2500 1 8 80dB 98dB 1.2 $5.01
AD8253 Software Programmable Dual 10V to 34V Digital, Pin 4000 1 1,000 80dB 100dB 1 $4.95
AD8270 Dual Diff Amp Dual 5V to 36V Pin - 0.5 1.2 70dB 80dB 1 $1.91
AD8271 - - 5V to 36V - - 0.5 1.2 - - - $1.25
AD8273 Dual Audio Diff Amp Dual 5V to 36V Pin - 0.5 2 77dB - 2 $1.67
AD8274 Precision Diff Amp Dual 5V to 36V - 10000 0.5 2 - - - $1.05
AD8275 Level Shifting ACD Driver Single 3.3V to 15V Resistor - - - 96dB 96dB - $1.60
AD8276 - Single/Dual 2V to 36V fixed - - - 86dB - - $0.95
AD8277 - - 2V to 36V - - - - - - - $1.60
AD8278 - - 2V to 36V - - - - - - - $0.95
AD8290 Sensor Amp - 2.6V to 5.5V fixed - 50 50 - - 0.75 $1.52
AD8293G160 Zero Drift Filter Amp Single 1.8V to 5.5V fixed 0.5 160 160 94dB 94dB 0.7 $0.99
AD8293G80 Zero Drift Filter Amp Single 1.8V to 5.5V fixed 0.5 80 80 94dB 94dB 0.7 $0.99
AD8295 Precision IA Dual 4.6V to 36V Resistor 750 1 1,000 80dB 130dB 0.25 $2.59
AD8553 Zero Drift IA Single 1.8V to 5.5V Resistor 1 0.1 10,000 80dB 120dB 0.7 $1.32