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Precision op amps (Vos<1mV)

OPA333

ACTIVE

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

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Data sheet

OPA333

ACTIVE
Data sheet Order now

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 Offset drift (typ) (µV/°C) 0.02 Input bias current (max) (pA) 200 GBW (typ) (MHz) 0.35 Features EMI Hardened, Small Size, Zero Drift Slew rate (typ) (V/µs) 0.16 Rail-to-rail In, Out 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 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 Offset drift (typ) (µV/°C) 0.02 Input bias current (max) (pA) 200 GBW (typ) (MHz) 0.35 Features EMI Hardened, Small Size, Zero Drift Slew rate (typ) (V/µs) 0.16 Rail-to-rail In, Out 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 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 mm × 6 mm) SOT-23 (DBV) 5 8.12 mm² (2.9 mm × 2.8 mm) SOT-SC70 (DCK) 5 4.2 mm² (2 mm × 2.1 mm)
  • 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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Top documentation Type Title Format options Date
* Data sheet OPAx333 1.8-V, microPower, CMOS Operational Amplifiers, Zero-Drift Series datasheet (Rev. E) PDF | HTML Dec 17, 2015
White paper Optimizing Chopper Amplifier Accuracy (Rev. A) PDF | HTML May 15, 2025
Application brief Offset Correction Methods: Laser Trim, e-Trim, and Chopper (Rev. D) PDF | HTML Dec 5, 2024
Application note Low-level voltage-to-current converter circuit (Rev. A) PDF | HTML Oct 10, 2024
Circuit design Low-power, bidirectional current-sensing circuit (Rev. B) PDF | HTML Oct 2, 2024
Product overview Bridge Sensor Solution (Rev. A) PDF | HTML Jan 27, 2023
Technical article How to achieve microvoltage-level precision in thermopile applications PDF | HTML Dec 9, 2021
Circuit design Temperature sensing with NTC circuit (Rev. A) PDF | HTML Jun 3, 2021
Circuit design Temperature sensing with PTC circuit (Rev. B) PDF | HTML May 19, 2021
E-book An Engineer’s Guide to Designing with Precision Amplifiers Apr 29, 2021
Technical article The next evolution in automotive op amps PDF | HTML Apr 14, 2021
Application brief Zero-Drift Amplifiers: Features and Benefits (Rev. C) Jan 28, 2021
Application brief Minimize Errors in Weigh-Scales With Zero-Drift, EMI-Hardened, Precision Amps (Rev. A) PDF | HTML Dec 8, 2020
Application brief Low-Power, Small-Size, High-Side Current Monitoring Jun 3, 2020
Technical article How to design an infrared thermometer quickly PDF | HTML Apr 7, 2020
Application brief EMI-Hardened Op Amps Reduce Errors in Infusion Pumps (Rev. A) Aug 21, 2019
E-book The Signal e-book: A compendium of blog posts on op amp design topics PDF | HTML Mar 28, 2017
White paper Voltage-reference impact on total harmonic distortion Aug 1, 2016
Application note EMI Rejection Ratio of Op Amps (With OPA333 and OPA333-Q1 as an Example) (Rev. A) Jul 1, 2015
Application note OPA333, OPA2333 EMI Immunity Performance (Rev. A) Oct 31, 2012
Analog design Journal New zero-drift amplifier has an IQ of 17 μA May 18, 2007

Design & development

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

Evaluation board

AMP-PDK-EVM — Amplifier performance development kit evaluation module

The amplifier performance development kit (PDK) is an evaluation module (EVM) kit to test common operational amplifier (op amp) parameters and is compatible with most op amps and comparators. The EVM kit offers a main board with several socketed daughtercard options to fit package needs, allowing (...)

User guide: PDF | HTML
Supported products & hardware
Evaluation board

REF6025EVM-PDK — REF6025 voltage reference evaluation module

The REF6025EVM-PDK is a platform for evaluating the performance of the REF6025 voltage reference. The evaluation kit brings out the burst mode performance of the device which is a key feature of the device.
User guide: PDF
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Support software

SLAC783 — Source Files for SLAA867

Supported products & hardware
Simulation model

OPAx333 PSpice Model (Rev. G)

SBOC084G.ZIP (30 KB) - PSpice model
Supported products & hardware
Simulation model

OPAx333 TINA-TI Reference Design (Rev. G)

SBOC083G (323 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

OPAx333 TINA-TI Spice Model (Rev. F)

SBOM166F.ZIP (11 KB) - TINA-TI Spice model
Supported products & hardware
Simulation model

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

SBOMAV6C (41 KB) - TINA-TI reference design
Supported products & hardware
Simulation model

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

SBOMAV5B (42 KB) - TINA-TI reference design
Supported products & hardware
Calculation tool

ANALOG-ENGINEER-CALC — PC software 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 (...)

Supported products & hardware
Calculation tool

OPAMP-NOISECALC — Noise Calculator

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, (...)
Supported products & hardware
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 (...)
Supported products & hardware
Design tool

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

This circuit delivers a precise low-level current, IL, to a load, RL. The design operates on a single 5-V supply and uses one precision low-drift op amp and one instrumentation amplifier. Simple modifications can change the range and accuracy of the voltage-to-current (V-I) converter.
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Many TI reference designs include the OPA333

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Package Pins CAD symbols, footprints & 3D models
SOIC (D) 8 Ultra Librarian
SOT-23 (DBV) 5 Ultra Librarian
SOT-SC70 (DCK) 5 Ultra Librarian
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