OPA333

ACTIVE

Micropower, 1.8-V, 17-µA zero-drift CMOS precision operational amplifier

Product details

Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.8 Vos (offset voltage at 25°C) (max) (mV) 0.01 GBW (typ) (MHz) 0.35 Features EMI Hardened, Small Size, Zero Drift Slew rate (typ) (V/µs) 0.16 Rail-to-rail In, Out Offset drift (typ) (µV/°C) 0.02 Iq per channel (typ) (mA) 0.017 Vn at 1 kHz (typ) (nV√Hz) 55 CMRR (typ) (dB) 130 Rating Catalog Operating temperature range (°C) -40 to 125 Input bias current (max) (pA) 200 Iout (typ) (A) 0.005 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) 0.1 Output swing headroom (to negative supply) (typ) (V) 0.03 Output swing headroom (to positive supply) (typ) (V) -0.03
Number of channels 1 Total supply voltage (+5 V = 5, ±5 V = 10) (max) (V) 5.5 Total supply voltage (+5 V = 5, ±5 V = 10) (min) (V) 1.8 Vos (offset voltage at 25°C) (max) (mV) 0.01 GBW (typ) (MHz) 0.35 Features EMI Hardened, Small Size, Zero Drift Slew rate (typ) (V/µs) 0.16 Rail-to-rail In, Out Offset drift (typ) (µV/°C) 0.02 Iq per channel (typ) (mA) 0.017 Vn at 1 kHz (typ) (nV√Hz) 55 CMRR (typ) (dB) 130 Rating Catalog Operating temperature range (°C) -40 to 125 Input bias current (max) (pA) 200 Iout (typ) (A) 0.005 Architecture CMOS Input common mode headroom (to negative supply) (typ) (V) -0.1 Input common mode headroom (to positive supply) (typ) (V) 0.1 Output swing headroom (to negative supply) (typ) (V) 0.03 Output swing headroom (to positive supply) (typ) (V) -0.03
SOIC (D) 8 29.4 mm² 4.9 x 6 SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8 SOT-SC70 (DCK) 5 2.5 mm² 2 x 1.25
  • Low Offset Voltage: 10 µV (Maximum)
  • Zero Drift: 0.05 µV/°C (Maximum)
  • 0.01-Hz to 10-Hz Noise: 1.1 µVPP
  • Quiescent Current: 17 µA
  • Single-Supply Operation
  • Supply Voltage: 1.8 V to 5.5V
  • Rail-to-Rail Input/Output
  • microSize Packages: SC70 and SOT23
  • Low Offset Voltage: 10 µV (Maximum)
  • Zero Drift: 0.05 µV/°C (Maximum)
  • 0.01-Hz to 10-Hz Noise: 1.1 µVPP
  • Quiescent Current: 17 µA
  • Single-Supply Operation
  • Supply Voltage: 1.8 V to 5.5V
  • Rail-to-Rail Input/Output
  • microSize Packages: SC70 and SOT23

The OPAx333 series of CMOS operational amplifiers use a proprietary auto-calibration technique to simultaneously provide very low offset voltage (10 µV, maximum) and near-zero drift over time and temperature. These miniature, high-precision, low quiescent current amplifiers offer high-impedance inputs that have a common-mode range 100 mV beyond the rails, and rail-to-rail output that swings within 50 mV of the rails. Single or dual supplies as low as 1.8 V (±0.9 V) and up to 5.5 V (±2.75 V) can be used. These devices are optimized for low-voltage, single-supply operation.

The OPAx333 family offers excellent CMRR without the crossover associated with traditional complementary input stages. This design results in superior performance for driving analog-to-digital converters (ADCs) without degradation of differential linearity.

The OPA333 (single version) is available in the 5-pin SOT-23, SOT, and 8-pin SOIC packages, while the OPA2333 (dual version) is available in the 8-pin VSON, SOIC, and VSSOP packages. All versions are specified for operation from –40°C to 125°C.

The OPAx333 series of CMOS operational amplifiers use a proprietary auto-calibration technique to simultaneously provide very low offset voltage (10 µV, maximum) and near-zero drift over time and temperature. These miniature, high-precision, low quiescent current amplifiers offer high-impedance inputs that have a common-mode range 100 mV beyond the rails, and rail-to-rail output that swings within 50 mV of the rails. Single or dual supplies as low as 1.8 V (±0.9 V) and up to 5.5 V (±2.75 V) can be used. These devices are optimized for low-voltage, single-supply operation.

The OPAx333 family offers excellent CMRR without the crossover associated with traditional complementary input stages. This design results in superior performance for driving analog-to-digital converters (ADCs) without degradation of differential linearity.

The OPA333 (single version) is available in the 5-pin SOT-23, SOT, and 8-pin SOIC packages, while the OPA2333 (dual version) is available in the 8-pin VSON, SOIC, and VSSOP packages. All versions are specified for operation from –40°C to 125°C.

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Technical documentation

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Type Title Date
* Data sheet OPAx333 1.8-V, microPower, CMOS Operational Amplifiers, Zero-Drift Series datasheet (Rev. E) PDF | HTML 17 Dec 2015
More literature Bridge Sensor Solution (Rev. A) PDF | HTML 27 Jan 2023
Technical article How to achieve microvoltage-level precision in thermopile applications 09 Dec 2021
Circuit design Temperature sensing with NTC circuit (Rev. A) PDF | HTML 03 Jun 2021
Circuit design Temperature sensing with PTC circuit (Rev. B) PDF | HTML 19 May 2021
E-book An Engineer’s Guide to Designing with Precision Amplifiers 29 Apr 2021
Technical article The next evolution in automotive op amps 14 Apr 2021
Application note Offset Correction Methods: Laser Trim, e-Trim, and Chopper (Rev. C) PDF | HTML 13 Apr 2021
Application note Zero-Drift Amplifiers: Features and Benefits (Rev. C) 28 Jan 2021
Application note Minimize Errors in Weigh-Scales With Zero-Drift, EMI-Hardened, Precision Amps (Rev. A) PDF | HTML 08 Dec 2020
Technical article How to design an infrared thermometer quickly 07 Apr 2020
Application note EMI-Hardened Op Amps Reduce Errors in Infusion Pumps (Rev. A) 21 Aug 2019
Circuit design Low-power, bidirectional current-sensing circuit (Rev. A) 18 Feb 2019
Circuit design Low-level voltage-to-current converter circuit 09 Jan 2019
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Technical article How to fix your simulations when the macromodel’s voltage noise doesn’t match the datasheet 30 Sep 2016
White paper Voltage-reference impact on total harmonic distortion 01 Aug 2016
Application note EMI Rejection Ratio of Op Amps (With OPA333 and OPA333-Q1 as an Example) (Rev. A) 01 Jul 2015
Application note OPA333, OPA2333 EMI Immunity Performance (Rev. A) 31 Oct 2012
Analog Design Journal New zero-drift amplifier has an IQ of 17 μA 18 May 2007

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Evaluation board

DIP-ADAPTER-EVM — DIP adapter evaluation module

Speed up your op amp prototyping and testing with the DIP adapter evaluation module (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 (...)

User guide: PDF
Not available on TI.com
Evaluation board

DIYAMP-EVM — Universal do-it-yourself (DIY) amplifier circuit evaluation module

The DIYAMP-EVM is an 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, SOT-23 and SOIC) (...)

User guide: PDF | HTML
Evaluation board

REF6025EVM-PDK — REF6025 voltage reference evaluation module

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User guide: PDF
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Support software

Source Files for SLAA867

SLAC783.ZIP (15 KB)
Simulation model

OPAx333 PSpice Model (Rev. G)

SBOC084G.ZIP (30 KB) - PSpice Model
Simulation model

OPAx333 TINA-TI Reference Design (Rev. G)

SBOC083G.TSC (323 KB) - TINA-TI Reference Design
Simulation model

OPAx333 TINA-TI Spice Model (Rev. F)

SBOM166F.ZIP (11 KB) - TINA-TI Spice Model
Simulation model

TINA-TI Reference Design Companion for Temperature Sensing with NTC Circuit (Rev. C)

SBOMAV6C.TSC (41 KB) - TINA-TI Reference Design
Simulation model

TINA-TI Reference Design Companion for Temperature Sensing with PTC Circuit (Rev. B)

SBOMAV5B.TSC (42 KB) - TINA-TI Reference Design
Calculation tool

ANALOG-ENGINEER-CALC — Analog engineer's calculator

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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:
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Design tool

CIRCUIT060001 — Single-supply, low-side, unidirectional current-sensing circuit

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User guide: PDF
Design tool

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 (...)
User guide: PDF
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 (...)
Design tool

CIRCUIT060004 — Low-noise and long-range PIR sensor conditioner circuit

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CIRCUIT060005 — High-side current sensing with discrete difference amplifier circuit

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User guide: PDF
Design tool

CIRCUIT060006 — Bridge amplifier circuit

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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 (...)
User guide: PDF
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
Design tool

CIRCUIT060009 — Half-wave rectifier circuit

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Design tool

CIRCUIT060010 — PWM generator circuit

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User guide: PDF
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 (...)
Design tool

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

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Design tool

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

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User guide: PDF
Design tool

CIRCUIT060016 — Non-inverting microphone pre-amplifier circuit

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User guide: PDF
Design tool

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

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Design tool

CIRCUIT060018 — Photodiode amplifier circuit

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User guide: PDF
Design tool

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

CIRCUIT060043 — Low-level voltage-to-current converter circuit

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Design tool

CIRCUIT060074 — High-side current sensing with comparator 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 (...)
Simulation tool

TINA-TI — SPICE-based analog simulation program

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