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Precision op amps (Vos<1mV)

OPA333

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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 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

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Evaluation board

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Support software

Source Files for SLAA867

SLAC783.ZIP (15 KB)
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OPAx333 PSpice Model (Rev. G)

SBOC084G.ZIP (30 KB) - PSpice Model
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OPAx333 TINA-TI Reference Design (Rev. G)

SBOC083G.TSC (323 KB) - TINA-TI Reference Design
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OPAx333 TINA-TI Spice Model (Rev. F)

SBOM166F.ZIP (11 KB) - TINA-TI Spice Model
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SBOMAV6C.TSC (41 KB) - TINA-TI Reference Design
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TINA-TI Reference Design Companion for Temperature Sensing with PTC Circuit (Rev. B)

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Simulation tool

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SOIC (D) 8 View options
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