AD8671

PRODUCTION

Precision Low Noise, Low Input Bias Current, Single Op Amp

Data Sheet (Rev. F) Product Selection Table
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Overview

  • Very low noise:
    2.8 nV/√Hz, 77 nV p-p
  • Wide Bandwidth: 10MHz
  • Low Input Bias Current:
    12 nA max
  • Low Offset Voltage: 75 µV max
  • High open loop gain: 120 dB min
  • Low supply current:
    3 mA typ per amplifier
  • Dual supply operation:
    ±5V to ±15V
  • Unity Gain Stable
  • No Phase Reversal

The AD8671/AD8672/AD8674 are very high precision amplifiers featuring very low noise, very low offset voltage and drift, low input bias current, 10 MHz bandwidth, and low power consumption. Outputs are stable with capacitive loads of over 1000 pF. Supply current is less than 3 mA per amplifier at 30 V.

The AD8671/AD8672/AD8674’s combination of ultralow noise, high precision, speed, and stability is unmatched. The MSOP version of the AD8671/AD8672 requires only half the board space of comparable amplifiers.

Applications for these amplifiers include high quality PLL filters, precision filters, medical and analytical instrumentation, precision power supply controls, ATE, data acquisition, and precision controls as well as professional quality audio.

The AD8671/AD8672 are specified over the extended industrial temperature range (−40°C to +125°C), and the AD8674 is specified over the industrial temperature range (−40°C to +85°C).

The AD8671/AD8672 are available in the 8-lead SOIC and 8-lead MSOP packages. The AD8674 is available in 14-lead SOIC and 14-lead TSSOP packages.

Surface-mount devices in MSOP packages are available in tape and reel only.

APPLICATIONS
  • PLL filters
  • Filters for GPS
  • Instrumentation
  • Sensors and controls
  • Professional quality audio
AD8671
Precision Low Noise, Low Input Bias Current, Single Op Amp
AD8671-pcl
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Documentation

Data Sheet 1

Application Note 2

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Software Resources

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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • AD8671

Signal Chain Designer

Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.

Open Tool

Analog Filter Wizard

Use the Analog Filter Wizard to design low-pass, high-pass, or band-pass filters with actual op amps in minutes. As you progress through the design process, you can observe the characteristics of your filter design from ideal specifications to real world circuit behavior. Quickly evaluate the tradeoffs in op amp specifications - including gain-bandwidth, noise, and supply current – to determine the best filter design for your requirements.

Open Tool

Analog Photodiode Wizard

Use Photodiode Wizard to design a transimpedance amplifier circuit to interface with a photodiode. Select a photodiode from the library included in the tool, or enter custom photodiode specifications. Quickly observe tradeoffs between Bandwidth, Peaking (Q), and ENOB/SNR. Modify circuit parameters, and immediately see results in plots for pulse response, frequency response, and noise gain.

Open Tool

SPICE Model 1

LTspice

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Evaluation Kits

EVAL-OPAMP-1

EVAL-OPAMP-1 Evaluation Board

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Product Details

The Universal Precision Op Amp Evaluation Boards have been designed and optimized for many circuit configurations allowing the users to best suit their applications. These boards are all RoHs Compliant. See references below on what board to order by lead count and package.

  • EVAL-PRAOPAMP-1KSZ (Single 5-Lead SC70) KS-5
  • EVAL-PRAOPAMP-1RJZ (Single 5-Lead SOT 23) RJ-5
  • EVAL-PRAOPAMP-1RMZ (Single 8-Lead MSOP) RM-8
  • EVAL-PRAOPAMP-1RZ (Single 8-Lead SOIC) R-8
EVAL-OPAMP-1
EVAL-OPAMP-1 Evaluation Board

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