Zero-drift (10µV, 0.001µV/C˚), MUX-friendly, low-noise, RRO, CMOS precision op amp (dual)
Product details
Parameters
Package | Pins | Size
Features
- Low offset voltage: 10 µV (maximum)
- Zero drift: 0.001 µV/°C
- Low noise: 15 nV/√Hz
- PSRR: 160 dB
- CMRR: 140 dB
- AOL: 160 dB
- Quiescent Current: 100 µA
- Wide supply voltage: ±2.25 V to ±18 V
- Rail-to-rail output operation
- Input includes negative rail
- Low bias current: 100 pA (typical)
- EMI filtered inputs
- Microsize packages
Description
The OPAx187 series operational amplifiers use auto-zeroing techniques to simultaneously provide low-offset voltage (1 µV), and near zero drift over time and temperature. These miniature, high-precision, low-quiescent current amplifiers offer high-input impedance and rail-to-rail output swing within 5 mV of the rails into high-impedance loads. The input common-mode range includes the negative rail. Either single or dual supplies can be used in the range of 4.5 V to 36 V (±2.25 V to ±18 V).
The single version OPAx187 device is available in microsize 8-pin VSSOP, 5-pin SOT-23, and 8-pin SOIC packages. The dual version is offered in 8-pin VSSOP and 8-pin SOIC packages. The quad version is offered in 14-pin SOIC, 14-pin TSSOP, and 16-pin WQFN packages. All versions are specified for operation from –40°C to +125°C.
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Technical documentation
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View all 9 | Type | Title | Date | |
|---|---|---|---|
| * | Data sheet | OPAx187 0.001-µV/°C Drift, Low Power, Rail-to-Rail Output 36-V Operational Amplifiers Zero-Drift Series datasheet (Rev. E) | May 21, 2020 |
| Application note | Offset Correction Methods: Laser Trim, e-Trim, and Chopper (Rev. C) | Apr. 13, 2021 | |
| Application note | Zero-Drift Amplifiers: Features and Benefits (Rev. C) | Jan. 28, 2021 | |
| Application note | Minimize Errors in Weigh-Scales With Zero-Drift, EMI-Hardened, Precision Amps (Rev. A) | Dec. 08, 2020 | |
| Application note | EMI-Hardened Op Amps Reduce Errors in EKGs (Rev. A) | Aug. 21, 2019 | |
| Application note | Green-Williams-Lis: Improved Op Amp Spice Model | Jan. 28, 2019 | |
| Application note | How to Properly Configure Unused Operational Amplifiers (Rev. A) | Sep. 21, 2018 | |
| Technical article | “Trust, but verify” SPICE model accuracy, part 1: common-mode rejection ratio | Jul. 27, 2017 | |
| E-book | The Signal e-book: A compendium of blog posts on op amp design topics | Mar. 28, 2017 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
DIP-ADAPTER-EVM
Description
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 (...)
Features
- Simplifies prototyping of SMT IC’s
- Supports 6 common package types
- Low Cost
Description
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 12 (...)
Features
- 3 packages to choose from: SC70-5, SOT23-5 and SOIC-8
- 12 circuit configurations to choose from: Noninverting, Inverting, Active Filters, Difference Amp, Comparator and more!
- Dual and single supply configurations
- PCB designed for High performance: Optimized for each function
- Multiple interface options (...)
Design tools & simulation
SBOMAB4B.ZIP (9 KB) - TINA-TI Spice Model
SBOMAB5B.TSC (1093 KB) - TINA-TI Reference Design
SBOMAB6B.ZIP (13 KB) - PSpice Model
PSPICE-FOR-TI — 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 (...)
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
TINA-TI — 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 (...)
ANALOG-ENGINEER-CALC — 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 (...)
Features
- Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
- Noise calculations
- Common unit translation
- Solves common amplifier circuit design problems
- Gain selections using standard resistors
- Filter configurations
- Total noise for common amplifier configurations
- (...)
OPAMP-NOISECALC — 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 (...)
CIRCUIT060001 — 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.
Features
- Senses Temperature between 25°C - 50°C
- Output: 0.05V - 3.25V
- Single 3.3V Supply with half-supply reference
CIRCUIT060002 — 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 (...)
Features
- Senses Temperature between 25°C - 50°C
- Output: 0.05V - 3.25V
- Single 3.3V Supply with half-supply reference
CIRCUIT060003 — 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 (...)
Features
- Senses Temperature between 0°C - 50°C
- Output: 0.05V - 3.25V
- Single 3.3V Supply with half-supply reference
CIRCUIT060004 — 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 (...)
Features
- Single 5V Supply
- Passes frequencies between 0.7Hz - 10Hz
- AC Gain: 90dB
CIRCUIT060005 — 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 the load.
Features
- Single 36V supply
- Input: 50mA to 1A
- Output: 0.25V to 5V
CIRCUIT060006 — 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 (...)
Features
- Single 5V supply with half-supply reference
- Input: -2.22mV to 2.27mV differential
- Output: 225mV - 4.72V
- Strain gauge resistance variation: 115 - 125 Ohms
- Gain: 1001V/V
CIRCUIT060007 — 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 large (...)
Features
- Single 5V supply with half-supply reference
- Input: -2.22mV to 2.27mV differential
- Output: 225mV - 4.72V
- Strain gauge resistance variation: 115 - 125 Ohms
- Gain: 1001V/V
CIRCUIT060008 — 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.
Features
- 30V Split supply with ground reference
- Input: +/-25mV to +/-10V
- Output: 25mV to 10V
CIRCUIT060009 — 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 (...)
Features
- 5V Split supply
- Input: +/-0.2mVpp to +/-4Vpp
- Output: 0.1V to 2V
CIRCUIT060010 — 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 (...)
Features
- 5V Single supply with half-supply reference
- Input: -2V to 2V
- Output: 0V to 5V
CIRCUIT060011 — 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 when (...)
Features
- Single 5-V supply
- Input: +/-2.45 V
- Output: 50 mV to 4.95 V
- Cutoff frequency: 1 kHz
- Gain: -1 V/V
CIRCUIT060012 — 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 (...)
Features
- Single 5-V supply
- Input: +/-2.45 V
- Output: 50 mV to 4.95 V
- Cutoff frequency: 10 kHz
- Gain: -1 V/V
CIRCUIT060014 — 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 accurately (...)
Features
- Single 5-V supply
- Input: 0 V to 2 V
- Output: 0 mA to 100 mA
CIRCUIT060016 — This circuit uses a non–inverting amplifier circuit configuration to amplify the microphone output signal. This circuit has very good magnitude flatness and exhibits minor frequency response deviations over the audio frequency range. The circuit is designed to be operated from a single 5-V supply.
Features
- Single 5-V supply
- Input pressure: 100 dB SPL (2 Pa)
- Max output: 1.228 Vrms
- Frequency range: 20 Hz to 20 kHz
CIRCUIT060017 — 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.
Features
- Dual +/- 2.5-V supply
- Input: +/- 1.25 V
- Output: +/-2.4 V
- Bandwidth: 7 kHz
- Gain: 2 V/V to 1000 V/V
CIRCUIT060018 — This circuit consists of an op amp configured as a transimpedance amplifier for amplifying the light dependent current of a photodiode.
Features
- Single 5-V supply
- Input: 0 μA to 2.4 μA
- Output: 100 mV to 4.9 V
- Bandwidth: 20 kHz
CIRCUIT060019 — 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 ADC (...)
Features
- Single 5-V supply
- Input: -1 V to 2 V
- Output: 20 mV to 4.95 V
CIRCUIT060020 — 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 (...)
Features
- Dual +/- 15-V supply
- Input: +/- 7 V
- Output: +/-14 V
- Bandwidth: 3 kHz
- Gain: -2 V/V
CAD/CAE symbols
| Package | Pins | Download |
|---|---|---|
| SOIC (D) | 8 | View options |
| VSSOP (DGK) | 8 | View options |
Ordering & quality
Information included:
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- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
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