Product details

Number of channels (#) 2 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.5 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.2 Vos (offset voltage @ 25 C) (Max) (mV) 0.060 GBW (Typ) (MHz) 40 Features Shutdown, Small Size, Zero Crossover Slew rate (Typ) (V/us) 30 Rail-to-rail In, Out Offset drift (Typ) (uV/C) 0.15 Iq per channel (Typ) (mA) 3.8 Vn at 1 kHz (Typ) (nV/rtHz) 9.8 CMRR (Typ) (dB) 120 Rating Catalog Operating temperature range (C) -40 to 125 Input bias current (Max) (pA) 10 Output current (Typ) (mA) 63 Architecture CMOS THD + N @ 1 kHz (Typ) (%) 0.00017
Number of channels (#) 2 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.5 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.2 Vos (offset voltage @ 25 C) (Max) (mV) 0.060 GBW (Typ) (MHz) 40 Features Shutdown, Small Size, Zero Crossover Slew rate (Typ) (V/us) 30 Rail-to-rail In, Out Offset drift (Typ) (uV/C) 0.15 Iq per channel (Typ) (mA) 3.8 Vn at 1 kHz (Typ) (nV/rtHz) 9.8 CMRR (Typ) (dB) 120 Rating Catalog Operating temperature range (C) -40 to 125 Input bias current (Max) (pA) 10 Output current (Typ) (mA) 63 Architecture CMOS THD + N @ 1 kHz (Typ) (%) 0.00017
VQFN (RGR) 20 12 mm² 3.5 x 3.5
  • Precision operational amplifier with integrated switches for transimpedance applications
  • Wide bandwidth: 40 MHz
  • Low offset voltage: 60 µV (max)
  • Very low offset drift: 1 µV/°C (max)
  • Low input bias current: 0.2 pA
  • Rail-to-rail input and output
  • Zero-crossover input stage
  • Low voltage noise: 6.1 nV/√Hz at 10 kHz
  • Low current noise: 0.125 pA/√Hz at 10 kHz
  • Low leakage switches: 10 pA
  • Slew rate: 30 V/µs
  • Quiescent current: 3.8 mA per channel
  • Current in shutdown mode: 30 µA
  • Output impedance in shutdown mode: 100 GΩ
  • Single-supply voltage range: 2.2 V to 5.5 V
  • Unity-gain stable
  • Small packages:
    • 20-lead, 3.5-mm x 3.5-mm VQFN
    • 2.0-mm x 2.0-mm DSBGA
  • Precision operational amplifier with integrated switches for transimpedance applications
  • Wide bandwidth: 40 MHz
  • Low offset voltage: 60 µV (max)
  • Very low offset drift: 1 µV/°C (max)
  • Low input bias current: 0.2 pA
  • Rail-to-rail input and output
  • Zero-crossover input stage
  • Low voltage noise: 6.1 nV/√Hz at 10 kHz
  • Low current noise: 0.125 pA/√Hz at 10 kHz
  • Low leakage switches: 10 pA
  • Slew rate: 30 V/µs
  • Quiescent current: 3.8 mA per channel
  • Current in shutdown mode: 30 µA
  • Output impedance in shutdown mode: 100 GΩ
  • Single-supply voltage range: 2.2 V to 5.5 V
  • Unity-gain stable
  • Small packages:
    • 20-lead, 3.5-mm x 3.5-mm VQFN
    • 2.0-mm x 2.0-mm DSBGA

The OPA3S328 is a precision, low-voltage, CMOS operational amplifier (op amp) with integrated switches that are optimized for flexible transimpedance applications. Low input bias current and low input capacitance allows for high-frequency transimpedance gains at low photocurrent operation (< 1 nA). The integrated switches, low offset, and rail-to-rail output performance of the OPA3S328 enable high accuracy across multiple decades of current values. Small packages, along with integrated switches, allow for selectable transimpedance gains and help reduce size for space-constrained applications.

The OPA3S328 features zero-crossover input technology, giving the flexibility for the input common-mode range to span the full supply range without offset deviations. The device provides enable-disable capability to allow for portable, handheld applications in test and measurement. When disabled, the OPA3S328 output impedance is typically 100 GΩ, allowing for wired-OR applications using multiple transimpedance channels.

The OPA3S328 is a precision, low-voltage, CMOS operational amplifier (op amp) with integrated switches that are optimized for flexible transimpedance applications. Low input bias current and low input capacitance allows for high-frequency transimpedance gains at low photocurrent operation (< 1 nA). The integrated switches, low offset, and rail-to-rail output performance of the OPA3S328 enable high accuracy across multiple decades of current values. Small packages, along with integrated switches, allow for selectable transimpedance gains and help reduce size for space-constrained applications.

The OPA3S328 features zero-crossover input technology, giving the flexibility for the input common-mode range to span the full supply range without offset deviations. The device provides enable-disable capability to allow for portable, handheld applications in test and measurement. When disabled, the OPA3S328 output impedance is typically 100 GΩ, allowing for wired-OR applications using multiple transimpedance channels.

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Technical documentation

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Type Title Date
* Data sheet OPA3S328 40-MHz, Dual, Precision, Low-Noise, Low-Input-Bias-Current CMOS Operational Amplifier With Integrated Switches datasheet (Rev. A) 21 Sep 2021
Application note Build a Programmable Gain Transimpedance Amplifiers Using the OPA3S328 12 May 2021
E-book An Engineer’s Guide to Designing with Precision Amplifiers 29 Apr 2021
Certificate OPA3S328EVM EU RoHS Declaration of Conformity (DoC) 19 Nov 2020
User guide OPA3S328 Evaluation Module 14 Oct 2019

Design & development

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