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Precision op amps (Vos<1mV)

OPA388-Q1

ACTIVE

Automotive qualified, wide bandwidth, zero drift, zero cross over, precision amplifier

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Data sheet

OPA388-Q1

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) 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 Automotive Operating temperature range (C) -40 to 125 TI functional safety category Functional Safety-Capable 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 Automotive Operating temperature range (C) -40 to 125 TI functional safety category Functional Safety-Capable Input bias current (Max) (pA) 350 Output current (Typ) (mA) 60 Architecture CMOS THD + N @ 1 kHz (Typ) (%) 0.0005
SOT-23 (DBV) 5 5 mm² 2.9 x 1.6

The OPA388-Q1 and OPA2388-Q1 ( OPAx388-Q1) are automotive, low-noise, fast-settling, zero-drift, precision operational amplifiers that provide rail-to-rail input and output operation. Excellent ac performance, combined with only 0.25 µV of offset and 0.005 µV/°C of drift over temperature, make the OPAx388-Q1 a great choice for driving high-resolution, analog-to-digital converters (ADCs) with high accuracy. Zero-crossover technology minimizes any offset change over the common-mode range. The combination of low drift and very low 1/f noise allow the OPAx388-Q1 to monitor and detect faulty conditions without compromising signal integrity.

These devices are specified over the industrial temperature range of –40°C to +125°C.

The OPA388-Q1 and OPA2388-Q1 ( OPAx388-Q1) are automotive, low-noise, fast-settling, zero-drift, precision operational amplifiers that provide rail-to-rail input and output operation. Excellent ac performance, combined with only 0.25 µV of offset and 0.005 µV/°C of drift over temperature, make the OPAx388-Q1 a great choice for driving high-resolution, analog-to-digital converters (ADCs) with high accuracy. Zero-crossover technology minimizes any offset change over the common-mode range. The combination of low drift and very low 1/f noise allow the OPAx388-Q1 to monitor and detect faulty conditions without compromising signal integrity.

These devices 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 OPAx388-Q1 Automotive, Precision, Zero-Drift, Zero-Crossover, True Rail-to-Rail, Input/Output Operational Amplifiers datasheet (Rev. A) PDF | HTML 22 Nov 2021
Design guide Automotive High-Voltage and Isolation Leakage Measurements Reference Design (Rev. A) PDF | HTML 05 Aug 2022
E-book An Engineer’s Guide to Designing with Precision Amplifiers 29 Apr 2021
Application note Zero-Drift Amplifiers: Features and Benefits (Rev. C) 28 Jan 2021
Functional safety information OPA388-Q1 Functional Safety, FIT Rate, Failure Mode Distribution and Pin FMA (Rev. A) PDF | HTML 19 Aug 2020
Application note Zero-crossover Amplifiers: Features and Benefits (Rev. A) PDF | HTML 09 Feb 2017

Design & development

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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.

The (...)

User guide: PDF
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Evaluation board

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

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Simulation model

OPAx388-Q1 PSpice Model (Rev. A)

SBOMC31A.ZIP (29 KB) - PSpice Model
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Simulation model

OPAx388-Q1 TINA-TI Spice Model

SBOMC32.ZIP (11 KB) - TINA-TI Spice Model
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Simulation model

OPAx388-Q1 TINA-TI Reference Design

SBOMC33.TSC (342 KB) - TINA-TI Reference Design
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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 (...)
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Simulation tool

TINA-TI — SPICE-based analog simulation program

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User guide: PDF
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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 (...)
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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, (...)
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Design tool

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User guide: PDF
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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 (...)
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CIRCUIT060003 — Temperature sensing with PTC thermistor circuit

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

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Design tool

CIRCUIT060005 — High-side current sensing with discrete difference amplifier circuit

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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 (...)
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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 (...)
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Design tool

CIRCUIT060008 — Full-wave rectifier circuit

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Design tool

CIRCUIT060009 — Half-wave rectifier circuit

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Design tool

CIRCUIT060010 — PWM generator circuit

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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 (...)
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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 (...)
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Design tool

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

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CIRCUIT060016 — Non-inverting microphone pre-amplifier circuit

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

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CIRCUIT060018 — Photodiode amplifier circuit

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

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CIRCUIT060020 — Inverting amplifier circuit

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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 (...)
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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 (...)
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SOT-23 (DBV) 5 View options

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