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Precision op amps (Vos<1mV)

OPA827

ACTIVE

Low-noise, high-precision, JFET-input operational amplifier

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Data sheet

OPA827

ACTIVE
Data sheet Order now

Product details

Number of channels (#) 1 Total supply voltage (Max) (+5V=5, +/-5V=10) 36 Total supply voltage (Min) (+5V=5, +/-5V=10) 8 Vos (offset voltage @ 25 C) (Max) (mV) 0.15 GBW (Typ) (MHz) 22 Features Burr-Brown™ Audio Slew rate (Typ) (V/us) 28 Rail-to-rail No Offset drift (Typ) (uV/C) 0.1 Iq per channel (Typ) (mA) 4.8 Vn at 1 kHz (Typ) (nV/rtHz) 4 CMRR (Typ) (dB) 114 Rating Catalog Operating temperature range (C) -40 to 125 Input bias current (Max) (pA) 10 Output current (Typ) (mA) 30 Architecture FET THD + N @ 1 kHz (Typ) (%) 0.00004
Number of channels (#) 1 Total supply voltage (Max) (+5V=5, +/-5V=10) 36 Total supply voltage (Min) (+5V=5, +/-5V=10) 8 Vos (offset voltage @ 25 C) (Max) (mV) 0.15 GBW (Typ) (MHz) 22 Features Burr-Brown™ Audio Slew rate (Typ) (V/us) 28 Rail-to-rail No Offset drift (Typ) (uV/C) 0.1 Iq per channel (Typ) (mA) 4.8 Vn at 1 kHz (Typ) (nV/rtHz) 4 CMRR (Typ) (dB) 114 Rating Catalog Operating temperature range (C) -40 to 125 Input bias current (Max) (pA) 10 Output current (Typ) (mA) 30 Architecture FET THD + N @ 1 kHz (Typ) (%) 0.00004
SOIC (D) 8 19 mm² 3.91 x 4.9 VSSOP (DGK) 8 15 mm² 3 x 4.9
  • Input Voltage Noise Density:
    4 nV/√Hz at 1 kHz
  • Input Voltage Noise:
    0.1 Hz to 10 Hz: 250 nVPP
  • Input Bias Current: 10 pA (Maximum)
  • Input Offset Voltage: 150 µV (Maximum)
  • Input Offset Drift: 2 µV/°C (Maximum)
  • Gain Bandwidth: 22 MHz
  • Slew Rate: 28 V/µs
  • Quiescent Current: 4.8 mA/Ch
  • Wide Supply Range: ±4 V to ±18 V
  • Packages: 8-Pin SOIC and 8-Pin VSSOP
  • Input Voltage Noise Density:
    4 nV/√Hz at 1 kHz
  • Input Voltage Noise:
    0.1 Hz to 10 Hz: 250 nVPP
  • Input Bias Current: 10 pA (Maximum)
  • Input Offset Voltage: 150 µV (Maximum)
  • Input Offset Drift: 2 µV/°C (Maximum)
  • Gain Bandwidth: 22 MHz
  • Slew Rate: 28 V/µs
  • Quiescent Current: 4.8 mA/Ch
  • Wide Supply Range: ±4 V to ±18 V
  • Packages: 8-Pin SOIC and 8-Pin VSSOP

The OPA827 series of JFET operational amplifiers combine outstanding DC precision with excellent AC performance. These amplifiers offer low offset voltage (150 µV, maximum), very low drift over temperature (0.5 µV/°C, typical), low-bias current (3 pA, typical), and very low 0.1-Hz to 10-Hz noise (250 nVPP, typical). The device operates over a wide supply voltage range, ±4 V to ±18 V on a low supply current (4.8 mA/Ch, typical).

Excellent AC characteristics, such as a 22-MHz gain bandwidth product (GBW), a slew rate of 28 V/µs, and precision DC characteristics make the OPA827 series well-suited for a wide range of applications including 16-bit to 18-bit mixed signal systems, transimpedance (I/V-conversion) amplifiers, filters, precision ±10-V front ends, and professional audio applications.

The OPA827 is available in both 8-pin SOIC and 8-pin VSSOP surface-mount packages, and is specified from –40°C to 125°C.

The OPA827 series of JFET operational amplifiers combine outstanding DC precision with excellent AC performance. These amplifiers offer low offset voltage (150 µV, maximum), very low drift over temperature (0.5 µV/°C, typical), low-bias current (3 pA, typical), and very low 0.1-Hz to 10-Hz noise (250 nVPP, typical). The device operates over a wide supply voltage range, ±4 V to ±18 V on a low supply current (4.8 mA/Ch, typical).

Excellent AC characteristics, such as a 22-MHz gain bandwidth product (GBW), a slew rate of 28 V/µs, and precision DC characteristics make the OPA827 series well-suited for a wide range of applications including 16-bit to 18-bit mixed signal systems, transimpedance (I/V-conversion) amplifiers, filters, precision ±10-V front ends, and professional audio applications.

The OPA827 is available in both 8-pin SOIC and 8-pin VSSOP surface-mount packages, and is specified from –40°C to 125°C.
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OPA828 ACTIVE High-speed (45 MHz and 150 V/μs), 36-V, low-noise (4 nV/√Hz) RRO JFET operational amplifier This product offers higher bandwidth (45MHz), higher slew rate (150V/μs), lower power (5.5mA) and lower voltage noise (4nV/√Hz)

Technical documentation

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Type Title Date
* Data sheet OPA827 Low-Noise, High-Precision, JFET-Input Operational Amplifier datasheet (Rev. I) PDF | HTML 29 Jul 2016
Application note MUX-Friendly, Precision Operational Amplifiers (Rev. C) PDF | HTML 08 Feb 2022
Application note Offset Correction Methods: Laser Trim, e-Trim, and Chopper (Rev. C) PDF | HTML 13 Apr 2021
Circuit design Fast-settling low-pass filter circuit 09 Jan 2019
Circuit design Circuit for driving an ADC with an instrumentation amplifier in high gain 04 Oct 2018
Circuit design Circuit for driving high-voltage SAR ADC with a buffered instrumentation 04 Oct 2018
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Analog Design Journal Analog Applications Journal 4Q 2014 24 Oct 2014
Analog Design Journal Distortion and source impedance in JFET-input op amps 24 Oct 2014
Technical article What you always wanted to know about TINA-TI but were afraid to ask! (Part 3) 09 Apr 2014
Technical article Let there be light: Converting light into voltage 24 Jan 2014
Technical article Differential Input Clamps-- can they affect your op amp circuits? 21 Mar 2012
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005

Design & development

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Evaluation board

DIP-ADAPTER-EVM — DIP adapter evaluation module

Speed up your op amp prototyping and testing with the DIP-Adapter-EVM, which provides a fast, easy and inexpensive way to interface with small, surface-mount ICs. You can connect any supported op amp using the included Samtec terminal strips or wire them directly to existing circuits.

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Evaluation board

DIYAMP-EVM — Universal Do-It-Yourself (DIY) Amplifier Circuit Evaluation Module

The DIYAMP-EVM is a unique evaluation module (EVM) family that provides engineers and do it yourselfers (DIYers) with real-world amplifier circuits, enabling you to quickly evaluate design concepts and verify simulations. It is available in three industry-standard packages (SC70, SOT23, SOIC) and (...)
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Support software

Source Files for SBAA286

SBAC216.ZIP (48 KB)
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Support software

Source Files for SBAA999

SBAC217.ZIP (54 KB)
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Simulation model

OPA827 Generic Spice Model Listing (Rev. B)

SBOC277B.ZIP (14 KB) - Spice Model
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Simulation model

OPA827 PSpice Model (Rev. A)

SBOMAX7A.ZIP (27 KB) - PSpice Model
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Simulation model

OPA827 TINA-TI Reference Design (Rev. E)

SBOC278E.TSC (303 KB) - TINA-TI Reference Design
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Simulation model

OPA827 TINA-TI Spice Model (Rev. D)

SBOM312D.ZIP (11 KB) - TINA-TI Spice Model
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Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

The analog engineer’s calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting operational-amplifier (...)
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Calculation tool

OPAMP-NOISECALC — Noise Calculator, Generator and Examples

This folder contains three tools to help in understandning and managing noise in cicuits. The included tools are:
  • A noise generator tool - This is a Lab View 4-Run Time executable that generates Gaussian white noise, uniform white noise, 1/f noise, short noise, and 60Hz line noise. Temporal data, (...)
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Design tool

CIRCUIT060001 —

Single-supply, low-side, unidirectional current-sensing circuit

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User guide: PDF
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CIRCUIT060002 — Temperature sensing with NTC thermistor circuit

This temperature sensing circuit uses a resistor in series with a negative–temperature–coefficient (NTC) thermistor to form a voltage divider, which has the effect of producing an output voltage that is linear over temperature. The circuit uses an op amp in a non–inverting (...)
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Design tool

CIRCUIT060003 — Temperature sensing with PTC thermistor circuit

This temperature sensing circuit uses a resistor in series with a positive–temperature–coefficient (PTC) thermistor to form a voltage–divider, which has the effect of producing an output voltage that is linear over temperature. The circuit uses an op amp in a non–inverting (...)
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CIRCUIT060004 — Low-noise and long-range PIR sensor conditioner circuit

This two stage amplifier design amplifies and filters the signal from a passive infrared (PIR) sensor. The circuit includes multiple low–pass and high–pass filters to reduce noise at the output of the circuit to be able to detect motion at long distances and reduce false triggers. This (...)
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CIRCUIT060005 — High-side current sensing with discrete difference amplifier circuit

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CIRCUIT060006 — Bridge amplifier circuit

A strain gauge is a sensor whose resistance varies with applied force. To measure the variation in resistance, the strain gauge is placed in a bridge configuration. This design uses a 2 op amp instrumentation circuit to amplify a differential signal created by the change in resistance of a strain (...)
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Design tool

CIRCUIT060007 — Low-side, bidirectional current-sensing circuit

This single-supply low-side, bidirectional current sensing solution can accurately detect load currents from –1A to 1A. The linear range of the output is from 110mV to 3.19V. Low-side current sensing keeps the common-mode voltage near ground, and is thus most useful in applications with (...)
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Design tool

CIRCUIT060008 — Full-wave rectifier circuit

This absolute value circuit can turn alternating current (AC) signals to single polarity signals. This circuit functions with limited distortion for ±10-V input signals at frequencies up to 50kHz and for signals as small as ±25mV at frequencies up to 1kHz.
User guide: PDF
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CIRCUIT060009 — Half-wave rectifier circuit

The precision half-wave rectifier inverts and transfers only the negative-half input of a time varying input signal (preferably sinusoidal) to its output. By appropriately selecting the feedback resistor values, different gains can be achieved. Precision half-wave rectifiers are commonly used with (...)
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Design tool

CIRCUIT060010 — PWM generator circuit

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Design tool

CIRCUIT060011 — Single-supply, second-order, multiple feedback high-pass filter circuit

The multiple-feedback (MFB) high-pass (HP) filter is a 2nd-order active filter. Vref provides a DC offset to accommodate for single-supply applications. This HP filter inverts the signal (Gain = –1 V/V) for frequencies in the pass band. An MFB filter is preferable when the gain is high or (...)
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Design tool

CIRCUIT060012 — Single-supply, 2nd-order, multiple feedback low-pass filter circuit

The multiple-feedback (MFB) low-pass filter (LP filter) is a second-order active filter. Vref provides a DC offset to accommodate for single-supply applications. This LP filter inverts the signal (Gain = –1 V/V) for frequencies in the pass band. An MFB filter is preferable when the gain is (...)
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Design tool

CIRCUIT060014 — Voltage-to-current (V-I) converter circuit with MOSFET

This single-supply, low-side, V-I converter delivers a well-regulated current to a load which can be connected to a voltage greater than the op amp supply voltage. The circuit accepts an input voltage between 0 V and 2 V and converts it to a current between 0 mA and 100 mA. The current is (...)
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Design tool

CIRCUIT060016 — Non-inverting microphone pre-amplifier circuit

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CIRCUIT060017 — Dual-supply, discrete, programmable gain amplifier circuit

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CIRCUIT060018 — Photodiode amplifier circuit

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CIRCUIT060019 — Inverting op amp with non-inverting positive reference voltage circuit

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CIRCUIT060020 — Inverting amplifier circuit

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Design tool

CIRCUIT060051 — Fast-settling low-pass filter circuit

This low-pass filter topology offers a significant improvement in settling time over the conventional single pole RC filter. This is achieved through the use of diodes D1 and D2, that allow the filter capacitor to charge and discharge much faster when there is a large enough difference between the (...)
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Design tool

CIRCUIT060074 — High-side current sensing with comparator circuit

This high-side, current sensing solution uses one comparator with a rail-to-rail input common mode range to create an over-current alert (OC-Alert) signal at the comparator output (COMP OUT) if the load current rises above 1 A. The OC-Alert signal in this implementation is active low. So when the (...)
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Design tool

CIRCUIT060075 — High-speed overcurrent detection circuit

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Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
User guide: PDF
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Many TI reference designs include the OPA827

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