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Precision op amps (Vos<1mV)

OPA320

ACTIVE

Precision, zero-crossover, 20-MHz, 0.9-pA Ib, RRIO, CMOS operational amplifier

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Data sheet

OPA320

ACTIVE
Data sheet Order now

Product details

Number of channels (#) 1 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.5 Total supply voltage (Min) (+5V=5, +/-5V=10) 1.8 Vos (offset voltage @ 25 C) (Max) (mV) 0.15 GBW (Typ) (MHz) 20 Features EMI Hardened, Shutdown, Zero Crossover Slew rate (Typ) (V/us) 10 Rail-to-rail In, Out Offset drift (Typ) (uV/C) 1.5 Iq per channel (Typ) (mA) 1.45 Vn at 1 kHz (Typ) (nV/rtHz) 8.5 CMRR (Typ) (dB) 114 Rating Catalog Operating temperature range (C) -40 to 125 Input bias current (Max) (pA) 0.9 Output current (Typ) (mA) 65 Architecture CMOS THD + N @ 1 kHz (Typ) (%) 0.0005
Number of channels (#) 1 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.5 Total supply voltage (Min) (+5V=5, +/-5V=10) 1.8 Vos (offset voltage @ 25 C) (Max) (mV) 0.15 GBW (Typ) (MHz) 20 Features EMI Hardened, Shutdown, Zero Crossover Slew rate (Typ) (V/us) 10 Rail-to-rail In, Out Offset drift (Typ) (uV/C) 1.5 Iq per channel (Typ) (mA) 1.45 Vn at 1 kHz (Typ) (nV/rtHz) 8.5 CMRR (Typ) (dB) 114 Rating Catalog Operating temperature range (C) -40 to 125 Input bias current (Max) (pA) 0.9 Output current (Typ) (mA) 65 Architecture CMOS THD + N @ 1 kHz (Typ) (%) 0.0005
SOT-23 (DBV) 6 5 mm² 2.9 x 1.6 SOT-23 (DBV) 5 5 mm² 2.9 x 1.6
  • Precision with Zero-Crossover Distortion:
    • Low Offset Voltage: 150 µV (Maximum)
    • High CMRR: 114 dB
    • Rail-to-Rail I/O
  • Low Input Bias Current: 0.9 pA (Maximum)
  • Low Noise: 7 nV/√Hz at 10 kHz
  • Wide Bandwidth: 20 MHz
  • Slew Rate: 10 V/µs
  • Quiescent Current: 1.45 mA/Ch
  • Single-Supply Voltage Range: 1.8 V to 5.5 V
  • OPA320S and OPA2320S:
    • IQ in Shutdown Mode: 0.1 µA
  • Unity-Gain Stable
  • Small Packages:
    • SOT-23, VSSOP, SON, and SOIC
  • Precision with Zero-Crossover Distortion:
    • Low Offset Voltage: 150 µV (Maximum)
    • High CMRR: 114 dB
    • Rail-to-Rail I/O
  • Low Input Bias Current: 0.9 pA (Maximum)
  • Low Noise: 7 nV/√Hz at 10 kHz
  • Wide Bandwidth: 20 MHz
  • Slew Rate: 10 V/µs
  • Quiescent Current: 1.45 mA/Ch
  • Single-Supply Voltage Range: 1.8 V to 5.5 V
  • OPA320S and OPA2320S:
    • IQ in Shutdown Mode: 0.1 µA
  • Unity-Gain Stable
  • Small Packages:
    • SOT-23, VSSOP, SON, and SOIC

The OPA320 (single) and OPA2320 (dual) are a new generation of precision, low-voltage CMOS operational amplifiers optimized for very low noise and wide bandwidth while operating on a low quiescent current of only 1.45 mA.

The OPA320 series is ideal for low-power, single- supply applications. Low-noise (7 nV/√Hz) and high- speed operation also make them well-suited for driving sampling analog-to-digital converters (ADCs). Other applications include signal conditioning and sensor amplification.

The OPA320 features a linear input stage with zero- crossover distortion that delivers excellent common- mode rejection ratio (CMRR) of typically 114 dB over the full input range. The input common mode range extends 100 mV beyond the negative and positive supply rails. The output voltage typically swings within 10 mV of the rails.

In addition, the OPAx320 has a wide supply voltage range from 1.8 V to 5.5 V with excellent PSRR (106 dB) over the entire supply range, making them suitable for precision, low-power applications that run directly from batteries without regulation.

The OPA320 (single version) is available in a 5-pin SOT23 package; the OPA320S shutdown single version is available in an 6-pin SOT23 package. The dual OPA2320 is offered in 8-pin SOIC, VSSOP, and SON packages, and the OPA2320S (dual with shutdown) in a 10-pin VSSOP package.

The OPA320 (single) and OPA2320 (dual) are a new generation of precision, low-voltage CMOS operational amplifiers optimized for very low noise and wide bandwidth while operating on a low quiescent current of only 1.45 mA.

The OPA320 series is ideal for low-power, single- supply applications. Low-noise (7 nV/√Hz) and high- speed operation also make them well-suited for driving sampling analog-to-digital converters (ADCs). Other applications include signal conditioning and sensor amplification.

The OPA320 features a linear input stage with zero- crossover distortion that delivers excellent common- mode rejection ratio (CMRR) of typically 114 dB over the full input range. The input common mode range extends 100 mV beyond the negative and positive supply rails. The output voltage typically swings within 10 mV of the rails.

In addition, the OPAx320 has a wide supply voltage range from 1.8 V to 5.5 V with excellent PSRR (106 dB) over the entire supply range, making them suitable for precision, low-power applications that run directly from batteries without regulation.

The OPA320 (single version) is available in a 5-pin SOT23 package; the OPA320S shutdown single version is available in an 6-pin SOT23 package. The dual OPA2320 is offered in 8-pin SOIC, VSSOP, and SON packages, and the OPA2320S (dual with shutdown) in a 10-pin VSSOP package.
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Technical documentation

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Type Title Date
* Data sheet OPAx320x Precision, 20-MHz, 0.9-pA, Low-Noise, RRIO, CMOS Operational Amplifier With Shutdown datasheet (Rev. F) PDF | HTML 16 Dec 2016
More literature Bridge Sensor Solution PDF | HTML 25 May 2022
E-book An Engineer’s Guide to Designing with Precision Amplifiers 29 Apr 2021
Application note Cascading Precision Op Amp Stages for Optimal AC and DC Performance PDF | HTML 17 Aug 2020
Application note EMI-Hardened Op Amps Reduce Errors in Infusion Pumps (Rev. A) 21 Aug 2019
Circuit design Circuit to drive a switched capacitor reference input for high-precision devices 17 Jun 2019
Circuit design Charge pump circuit (–0.3V) for negative amplifier supply 16 Jun 2019
Circuit design Noninverting circuit for high-to-low voltage level translation to drive ADC 16 Jun 2019
Circuit design Powering a dual-supply op amp circuit with one LDO (Rev. A) 07 Mar 2019
Circuit design Single-supply, low-side, unidirectional current-sensing solution (Rev. A) 01 Feb 2019
Circuit design Difference amplifier (subtractor) circuit (Rev. A) 31 Jan 2019
Circuit design Circuit for differential output from a single-ended precision DAC 28 Jan 2019
Circuit design High-voltage battery monitor circuit: ±20V, 0–10kHz, 18-bit fully differential (Rev. A) 23 Jan 2019
Application note Multichannel Analog Input Modules for PLC Equipment 04 Jan 2019
E-book Analog Engineer’s Pocket Reference Guide Fifth Edition (Rev. C) 30 Nov 2018
Circuit design Single-ended to differential using a two op-amp circuit 08 Oct 2018
Circuit design High-current battery monitor circuit: 0–10A, 0-10kHz, 18 bit 22 Dec 2017
White paper Charging stations: Toward an EV support infrastructure 09 May 2017
E-book The Signal e-book: A compendium of blog posts on op amp design topics 28 Mar 2017
Application note Zero-crossover Amplifiers: Features and Benefits (Rev. A) PDF | HTML 09 Feb 2017
Technical article Pile on to a charger – my EV needs power 20 Dec 2016
Design guide Software Pacemaker Detection Design Guide 03 Dec 2015
Technical article Minimize your current, pick a sweet spot! 03 Sep 2014
Technical article What’s the difference between macro models and behavioral models? 23 Dec 2013
Application note OPA320, OPA320S, OPA2320, OPA2320S EMI Immunity Performance 24 May 2013
Technical article Filter for thought 16 May 2013

Design & development

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Support software

Source Files for SBAA265 (Rev. A)

SBAC193A.ZIP (75 KB)
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Simulation model

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Source Files for SBAA344

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Schematic

TIPD197 Design File

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