Product details

Number of channels (#) 1 Total supply voltage (Max) (+5V=5, +/-5V=10) 5.5 Total supply voltage (Min) (+5V=5, +/-5V=10) 2.5 Vos (offset voltage @ 25 C) (Max) (mV) 0.005 GBW (Typ) (MHz) 10 Features EMI Hardened, High Cload Drive, Zero Crossover, Zero Drift Slew rate (Typ) (V/us) 5 Rail-to-rail In, Out Offset drift (Typ) (uV/C) 0.005 Iq per channel (Typ) (mA) 1.7 Vn at 1 kHz (Typ) (nV/rtHz) 7 CMRR (Typ) (dB) 138 Rating Catalog Operating temperature range (C) -40 to 125 Input bias current (Max) (pA) 350 Output current (Typ) (mA) 60 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) 2.5 Vos (offset voltage @ 25 C) (Max) (mV) 0.005 GBW (Typ) (MHz) 10 Features EMI Hardened, High Cload Drive, Zero Crossover, Zero Drift Slew rate (Typ) (V/us) 5 Rail-to-rail In, Out Offset drift (Typ) (uV/C) 0.005 Iq per channel (Typ) (mA) 1.7 Vn at 1 kHz (Typ) (nV/rtHz) 7 CMRR (Typ) (dB) 138 Rating Catalog Operating temperature range (C) -40 to 125 Input bias current (Max) (pA) 350 Output current (Typ) (mA) 60 Architecture CMOS THD + N @ 1 kHz (Typ) (%) 0.0005
SOIC (D) 8 19 mm² 4.9 x 3.9 SOT-23 (DBV) 5 5 mm² 2.9 x 1.6 VSSOP (DGK) 8 15 mm² 3 x 4.9
  • Ultra-low offset voltage: ±0.25 µV
  • Zero drift: ±0.005 µV/°C
  • Zero crossover: 140-dB CMRR true RRIO
  • Low noise: 7.0 nV√Hz at 1 kHz
  • No 1/f noise: 140 nVPP (0.1 Hz to 10 Hz)
  • Fast settling: 2 µs (1 V to 0.01%)
  • Gain bandwidth: 10 MHz
  • Single supply: 2.5 V to 5.5 V
  • Dual supply: ±1.25 V to ±2.75 V
  • True rail-to-rail input and output
  • EMI/RFI filtered inputs
  • Industry-standard packages:
    • Single in SOIC-8, SOT-23-5, and VSSOP-8
    • Dual in SOIC-8 and VSSOP-8
    • Quad in SOIC-14 and TSSOP-14
  • Ultra-low offset voltage: ±0.25 µV
  • Zero drift: ±0.005 µV/°C
  • Zero crossover: 140-dB CMRR true RRIO
  • Low noise: 7.0 nV√Hz at 1 kHz
  • No 1/f noise: 140 nVPP (0.1 Hz to 10 Hz)
  • Fast settling: 2 µs (1 V to 0.01%)
  • Gain bandwidth: 10 MHz
  • Single supply: 2.5 V to 5.5 V
  • Dual supply: ±1.25 V to ±2.75 V
  • True rail-to-rail input and output
  • EMI/RFI filtered inputs
  • Industry-standard packages:
    • Single in SOIC-8, SOT-23-5, and VSSOP-8
    • Dual in SOIC-8 and VSSOP-8
    • Quad in SOIC-14 and TSSOP-14

The OPAx388 (OPA388, OPA2388, and OPA4388) series of precision operational amplifiers are ultra-low noise, fast-settling, zero-drift, zero-crossover devices that provide rail-to-rail input and output operation. These features and excellent ac performance, combined with only 0.25 µV of offset and 0.005 µV/°C of drift over temperature, makes the OPAx388 a great choice for driving high-precision, analog-to-digital converters (ADCs) or buffering the output of high-resolution, digital-to-analog converters (DACs). This design results in excellent performance when driving analog-to-digital converters (ADCs) without degradation of linearity. The OPA388 (single version) is available in the VSSOP-8, SOT23-5, and SOIC-8 packages. The OPA2388 (dual version) is offered in the VSSOP-8 and SO-8 packages. The OPA4388 (quad version) is offered in the TSSOP-14 and SO-14 packages. All versions are specified over the industrial temperature range of –40°C to +125°C.

The OPAx388 (OPA388, OPA2388, and OPA4388) series of precision operational amplifiers are ultra-low noise, fast-settling, zero-drift, zero-crossover devices that provide rail-to-rail input and output operation. These features and excellent ac performance, combined with only 0.25 µV of offset and 0.005 µV/°C of drift over temperature, makes the OPAx388 a great choice for driving high-precision, analog-to-digital converters (ADCs) or buffering the output of high-resolution, digital-to-analog converters (DACs). This design results in excellent performance when driving analog-to-digital converters (ADCs) without degradation of linearity. The OPA388 (single version) is available in the VSSOP-8, SOT23-5, and SOIC-8 packages. The OPA2388 (dual version) is offered in the VSSOP-8 and SO-8 packages. The OPA4388 (quad version) is offered in the TSSOP-14 and SO-14 packages. All versions are specified over the industrial temperature range of –40°C to +125°C.

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Technical documentation

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Type Title Date
* Data sheet Precision, Zero-Drift, Zero-Crossover, True Rail-to-Rail, Input/Output Op Amps datasheet (Rev. D) 14 Jul 2020
Application note How to Select Amplifiers for Pressure Transmitter Applications (Rev. A) 27 Jul 2021
E-book An Engineer’s Guide to Designing with Precision Amplifiers 29 Apr 2021
Application note Offset Correction Methods: Laser Trim, e-Trim, and Chopper (Rev. C) 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) 08 Dec 2020
Technical article How to design an infrared thermometer quickly 07 Apr 2020
Application note EMI-Hardened Op Amps Reduce Errors in EKGs (Rev. A) 21 Aug 2019
Application note EMI-Hardened Op Amps Reduce Errors in Infusion Pumps (Rev. A) 21 Aug 2019
Application note Non-inverting op amp with non-inverting positive reference voltage circuit (Rev. A) 04 Feb 2019
Application note Green-Williams-Lis: Improved Op Amp Spice Model 28 Jan 2019
Application note High-speed overcurrent detection circuit (Rev. A) 17 Jan 2019
Application note Multichannel Analog Input Modules for PLC Equipment 04 Jan 2019
Application note How to Properly Configure Unused Operational Amplifiers (Rev. A) 21 Sep 2018
Technical article “Trust, but verify” SPICE model accuracy, part 3: slew rate and input clamping diodes 18 Sep 2017
Technical article “Trust, but verify” SPICE model accuracy, part 2: input offset voltage vs. input common-mode voltage 05 Sep 2017
Application note Dual Bipolar Power-Supply Considerations for Amplifiers 01 Aug 2017
Technical article Zero out your system error with zero drift, zero crossover and zero hassle 21 Apr 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) 09 Feb 2017

Design & development

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

Evaluation board

DIP-ADAPTER-EVM — DIP adapter evaluation module

Speed up your op amp prototyping and testing with the DIP-Adapter-EVM, which provides a fast, easy and inexpensive way to interface with small, surface-mount ICs. You can connect any supported op amp using the included Samtec terminal strips or wire them directly to existing circuits.

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Evaluation board

DIYAMP-EVM — Universal Do-It-Yourself (DIY) Amplifier Circuit Evaluation Module

The DIYAMP-EVM is a unique evaluation module (EVM) family that provides engineers and do it yourselfers (DIYers) with real-world amplifier circuits, enabling you to quickly evaluate design concepts and verify simulations. It is available in three industry-standard packages (SC70, SOT23, SOIC) and (...)
Simulation model

OPA388 TINA-TI Reference Design (Rev. B)

SBOMAB1B.TSC (330 KB) - TINA-TI Reference Design
Simulation model

OPA388 TINA-TI Spice Model (Rev. B)

SBOMAB2B.ZIP (8 KB) - TINA-TI Spice Model
Simulation model

OPA388 PSpice Model (Rev. B)

SBOMAB3B.ZIP (13 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

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Calculation tool

OPAMP-NOISECALC — Noise Calculator, Generator and Examples

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, (...)
Design tool

CIRCUIT060001 — Single-supply, low-side, unidirectional current-sensing circuit

This single–supply, low–side, current sensing solution accurately detects load current up to 1A and converts it to a voltage between 50mV and 4.9V. The input current range and output voltage range can be scaled as necessary and larger supplies can be used to accommodate larger swings.
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 (...)
Design tool

CIRCUIT060003 — Temperature sensing with PTC thermistor circuit

This temperature sensing circuit uses a resistor in series with a positive–temperature–coefficient (PTC) 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 (...)
Design tool

CIRCUIT060004 — Low-noise and long-range PIR sensor conditioner circuit

This two stage amplifier design amplifies and filters the signal from a passive infrared (PIR) sensor. The circuit includes multiple low–pass and high–pass filters to reduce noise at the output of the circuit to be able to detect motion at long distances and reduce false triggers. This (...)
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CIRCUIT060005 — High-side current sensing with discrete difference amplifier circuit

This single–supply, high–side, low–cost current sensing solution detects load current between 50mA and 1A and converters it to an output voltage from 0.25V to 5V. High–side sensing allows for the system to identify ground shorts and does not create a ground disturbance on (...)
Design tool

CIRCUIT060006 — Bridge amplifier circuit

A strain gauge is a sensor whose resistance varies with applied force. To measure the variation in resistance, the strain gauge is placed in a bridge configuration. This design uses a 2 op amp instrumentation circuit to amplify a differential signal created by the change in resistance of a strain (...)
Design tool

CIRCUIT060007 — Low-side, bidirectional current-sensing circuit

This single-supply low-side, bidirectional current sensing solution can accurately detect load currents from –1A to 1A. The linear range of the output is from 110mV to 3.19V. Low-side current sensing keeps the common-mode voltage near ground, and is thus most useful in applications with (...)
Design tool

CIRCUIT060008 — Full-wave rectifier circuit

This absolute value circuit can turn alternating current (AC) signals to single polarity signals. This circuit functions with limited distortion for ±10-V input signals at frequencies up to 50kHz and for signals as small as ±25mV at frequencies up to 1kHz.
Design tool

CIRCUIT060009 — Half-wave rectifier circuit

The precision half-wave rectifier inverts and transfers only the negative-half input of a time varying input signal (preferably sinusoidal) to its output. By appropriately selecting the feedback resistor values, different gains can be achieved. Precision half-wave rectifiers are commonly used with (...)
Design tool

CIRCUIT060010 — PWM generator circuit

This circuit utilizes a triangle wave generator and comparator to generate a 500 kHz pulse-width modulated (PWM) waveform with a duty cycle that is inversely proportional to the input voltage. An op amp and comparator generate a triangle waveform which is applied to the inverting input of a second (...)
Design tool

CIRCUIT060011 — Single-supply, second-order, multiple feedback high-pass filter circuit

The multiple-feedback (MFB) high-pass (HP) filter is a 2nd-order active filter. Vref provides a DC offset to accommodate for single-supply applications. This HP filter inverts the signal (Gain = –1 V/V) for frequencies in the pass band. An MFB filter is preferable when the gain is high or (...)
Design tool

CIRCUIT060012 — Single-supply, 2nd-order, multiple feedback low-pass filter circuit

The multiple-feedback (MFB) low-pass filter (LP filter) is a second-order active filter. Vref provides a DC offset to accommodate for single-supply applications. This LP filter inverts the signal (Gain = –1 V/V) for frequencies in the pass band. An MFB filter is preferable when the gain is (...)
Design tool

CIRCUIT060014 — Voltage-to-current (V-I) converter circuit with MOSFET

This single-supply, low-side, V-I converter delivers a well-regulated current to a load which can be connected to a voltage greater than the op amp supply voltage. The circuit accepts an input voltage between 0 V and 2 V and converts it to a current between 0 mA and 100 mA. The current is (...)
Design tool

CIRCUIT060016 — Non-inverting microphone pre-amplifier circuit

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Design tool

CIRCUIT060017 — Dual-supply, discrete, programmable gain amplifier circuit

This circuit provides programmable, non-inverting gains ranging from 6 dB (2 V/V) to 60 dB (1000 V/V) using a variable input resistance. The design maintains the same cutoff frequency over the gain range.
Design tool

CIRCUIT060018 — Photodiode amplifier circuit

This circuit consists of an op amp configured as a transimpedance amplifier for amplifying the light dependent current of a photodiode.
Design tool

CIRCUIT060019 — Inverting op amp with non-inverting positive reference voltage circuit

This design uses an inverting amplifier with a non-inverting positive reference voltage to translate an input signal of –1 V to 2 V to an output voltage of 0.05 V to 4.95 V. This circuit can be used to translate a sensor output voltage with a positive slope and negative offset to a usable (...)
Design tool

CIRCUIT060020 — Inverting amplifier circuit

This design inverts the input signal, Vi , and applies a signal gain of –2 V/V. The input signal typically comes from a low-impedance source because the input impedance of this circuit is determined by the input resistor, R1. The common-mode voltage of an inverting amplifier is equal to the (...)
Design tool

CIRCUIT060074 — High-side current sensing with comparator circuit

This high-side, current sensing solution uses one comparator with a rail-to-rail input common mode range to create an over-current alert (OC-Alert) signal at the comparator output (COMP OUT) if the load current rises above 1 A. The OC-Alert signal in this implementation is active low. So when the (...)
Design tool

CIRCUIT060075 — High-speed overcurrent detection circuit

This high-speed, low-side overcurrent detection solution is implemented with a single zero-drift fast-settling amplifier (OPA388) and one high-speed comparator (TLV3201). This circuit is designed for applications that monitor fast current signals and overcurrent events, such as current detection in (...)
Reference designs

TIDA-01402 — High-Precision Reference Design for Buffering a DAC Signal

This reference design features the industry's first zero-crossover and zero-drift amplifier (OPA388) to buffer the analog output of a digital-to-analog converter (DAC). It demonstrates the importance of the zero-crossover and zero-drift feature and how they can minimize the integral non-linearity (...)
Package Pins Download
SOIC (D) 8 View options
SOT-23 (DBV) 5 View options
VSSOP (DGK) 8 View options

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