Product details

Architecture Voltage FB Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.7 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.4 GBW (Typ) (MHz) 300 BW @ Acl (MHz) 90 Acl, min spec gain (V/V) 6 Slew rate (Typ) (V/us) 350 Vn at flatband (Typ) (nV/rtHz) 1.8 Vn at 1 kHz (Typ) (nV/rtHz) 1.8 Iq per channel (Typ) (mA) 0.96 Vos (offset voltage @ 25 C) (Max) (mV) 0.125 Rail-to-rail In to V-, Out Features Shutdown, Decompensated Rating Catalog Operating temperature range (C) -40 to 125 CMRR (Typ) (dB) 105 Input bias current (Max) (pA) 4400000 Offset drift (Typ) (uV/C) 0.4 Output current (Typ) (mA) 20 2nd harmonic (dBc) -110 3rd harmonic (dBc) -120 @ MHz 1
Architecture Voltage FB Number of channels (#) 1 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.7 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.4 GBW (Typ) (MHz) 300 BW @ Acl (MHz) 90 Acl, min spec gain (V/V) 6 Slew rate (Typ) (V/us) 350 Vn at flatband (Typ) (nV/rtHz) 1.8 Vn at 1 kHz (Typ) (nV/rtHz) 1.8 Iq per channel (Typ) (mA) 0.96 Vos (offset voltage @ 25 C) (Max) (mV) 0.125 Rail-to-rail In to V-, Out Features Shutdown, Decompensated Rating Catalog Operating temperature range (C) -40 to 125 CMRR (Typ) (dB) 105 Input bias current (Max) (pA) 4400000 Offset drift (Typ) (uV/C) 0.4 Output current (Typ) (mA) 20 2nd harmonic (dBc) -110 3rd harmonic (dBc) -120 @ MHz 1
SOT-23 (DBV) 6 5 mm² 2.9 x 1.6 SOT-SC70 (DCK) 6 4 mm² 2 x 2.1 SOT-SC70 (DCK) 5 4 mm² 2 x 2.1
  • Gain Bandwidth Product: 300 MHz
  • Very-Low (Trimmed) Supply Current: 950 µA
  • Bandwidth: 90 MHz (AV = 6 V/V)
  • High Full-Power Bandwidth: 45 MHz, 4 VPP
  • Negative Rail Input, Rail-to-Rail Output
  • Single-Supply Operating Range: 2.7 V to 5.4 V
  • 25°C Input Offset: ±125 µV (Maximum)
  • Input Offset Voltage Drift: < ±1.6 µV/°C (Maximum)
  • Input Voltage Noise: 1.8 nV/√Hz (> 200 Hz)
  • Input Current Noise: 1 pA/√Hz (> 2000 Hz)
  • < 1-µA Shutdown Current for Power Savings
  • Gain Bandwidth Product: 300 MHz
  • Very-Low (Trimmed) Supply Current: 950 µA
  • Bandwidth: 90 MHz (AV = 6 V/V)
  • High Full-Power Bandwidth: 45 MHz, 4 VPP
  • Negative Rail Input, Rail-to-Rail Output
  • Single-Supply Operating Range: 2.7 V to 5.4 V
  • 25°C Input Offset: ±125 µV (Maximum)
  • Input Offset Voltage Drift: < ±1.6 µV/°C (Maximum)
  • Input Voltage Noise: 1.8 nV/√Hz (> 200 Hz)
  • Input Current Noise: 1 pA/√Hz (> 2000 Hz)
  • < 1-µA Shutdown Current for Power Savings

The OPA838 decompensated voltage feedback operational amplifier provides a high 300-MHz gain bandwidth product with 1.8-nV/√Hz input noise voltage, requiring only a trimmed 0.95-mA supply current. These features combine to provide an extremely power-efficient solution for photodiode transimpedance designs and high-voltage gain stages, which require the lowest input voltage noise in signal receiver applications.

Operating at the minimum recommended noninverting gain of 6 V/V results in a 90-MHz, –3-dB bandwidth. Extremely low input noise and offset voltage make the OPA838 particularly suitable for high gains. Even at a DC-coupled gain of 1000 V/V, a 300-kHz signal bandwidth is available with a maximum output offset voltage of ±125 mV.

The single-channel OPA838 is available in 6-pin SOT-23 and SC70 packages with a power shutdown feature and a 5-pin SC70 package.

The OPA838 decompensated voltage feedback operational amplifier provides a high 300-MHz gain bandwidth product with 1.8-nV/√Hz input noise voltage, requiring only a trimmed 0.95-mA supply current. These features combine to provide an extremely power-efficient solution for photodiode transimpedance designs and high-voltage gain stages, which require the lowest input voltage noise in signal receiver applications.

Operating at the minimum recommended noninverting gain of 6 V/V results in a 90-MHz, –3-dB bandwidth. Extremely low input noise and offset voltage make the OPA838 particularly suitable for high gains. Even at a DC-coupled gain of 1000 V/V, a 300-kHz signal bandwidth is available with a maximum output offset voltage of ±125 mV.

The single-channel OPA838 is available in 6-pin SOT-23 and SC70 packages with a power shutdown feature and a 5-pin SC70 package.

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Technical documentation

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Type Title Date
* Data sheet OPA838 1-mA, 300-MHz Gain Bandwidth, Voltage-Feedback Op Amp datasheet (Rev. B) 10 Oct 2018
Technical article 3 common questions when designing with high-speed amplifiers 17 Jul 2020
Application note Higher accuracy using an external amplifier in ultrasonic flow measurement 05 Feb 2019
Technical article How to reduce distortion in high-voltage, high-frequency signal generation for AWGs 30 Oct 2018
Technical article What are the advantages of using JFET-input amplifiers in high-speed applications? 19 Jun 2018
Technical article Unique active mux capability combines buffer and switch into one solution 10 Oct 2017
Application note Noise Analysis for High Speed Op Amps (Rev. A) 17 Jan 2005

Design & development

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

Evaluation board

OPA838DBVEVM — OPA838 evaluation module for DBV package

The OPA838DBVEVM is an evaluation module for the single OPA838 amplifier in the DBV (SOT23-6) package. This evaluation module is designed to quickly and easily demonstrate the functionality and versatility of the amplifier. The EVM is ready to connect to power, signal source, and test instruments (...)
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Evaluation board

OPA838DCKEVM — OPA838 evaluation module for DCK package

The OPA838DCKEVM is an evaluation module for the single OPA838 amplifier in the DCK (SC70-5) package. This evaluation module is designed to quickly and easily demonstrate the functionality and versatility of the amplifier. The EVM is ready to connect to power, signal source, and test instruments (...)
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Simulation model

OPA838 TINA-TI Spice Model (Rev. A)

SBOMAE6A.ZIP (14 KB) - TINA-TI Spice Model
Simulation model

OPA838 TINA-TI Reference Design (Rev. A)

SBOMAE7A.TSC (51 KB) - TINA-TI Reference Design
Simulation model

OPA838 PSpice Model

SBOMBQ1.ZIP (185 KB) - PSpice Model
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

TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
Calculation tool

ANALOG-ENGINEER-CALC — 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 op-amp gain with feedback (...)
Calculation tool

VOLT-DIVIDER-CALC — Voltage Divider Determines A Set of Resistors for a Voltage Divider

VOLT-DIVIDER-CALC quickly determines a set of resistors for a voltage divider. This KnowledgeBase Javascript utility can be used to find a set of resistors for a voltage divider to achieve the desired output voltage. This calculator can also be used to design non-inverting attentuation circuits.

(...)

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Reference designs

TIDM-02005 — Optimized ultrasonic sensing metrology reference design for water flow measurement

This reference design helps designers develop a cost optimized ultrasonic water-metering subsystem using an integrated, ultrasonic sensing solution (USS) module, which provides superior metrology performance with low-power consumption and maximum integration. The design is based on the 64KB (...)
Reference designs

TIDM-02003 — Ultrasonic sensing subsystem reference design for gas flow measurement

This reference design helps designers develop an ultrasonic gas-metering subsystem using an integrated, ultrasonic sensing solution (USS) module, which provides superior metrology performance with low-power consumption and maximum integration. The design is based on the 64KB MSP430FR6043 (...)
Package Pins Download
SC70 (DCK) 5 View options
SC70 (DCK) 6 View options
SOT-23 (DBV) 6 View options

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