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Texas Instruments OPA186DR
- Part No.:
- OPA186DR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA186DR.pdf
- Description:
- AMPLIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:1,964
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Product details
Overview
OPA186 from Texas Instruments is a single-channel, zero-drift, rail-to-rail input/output operational amplifier optimized for precision signal conditioning in high-voltage (up to 24 V), low-power systems. It delivers 1 μV max offset voltage, 0.01 μV/°C max drift, 750 kHz gain bandwidth, and 90 µA quiescent current - enabling high-accuracy current sensing, sensor front-ends, and battery-powered instrumentation.
For engineers reviewing the OPA186 datasheet, OPA186 pinout, OPA186 application, or OPA186 equivalent, this page provides verified specifications, SOIC-8 and SOT-23-5 package details, functional pin definitions, real-world use cases in flow/pressure transmitters and electricity meters, and two validated alternative op amps with documented technical and application differences.
Technical Context
The OPA186 employs a proprietary auto-zeroing chopper architecture with notch filtering to eliminate 1/f noise and achieve near-zero offset drift over –40°C to +125°C. Its rail-to-rail input stage supports common-mode voltages extending 200 mV beyond supply rails, enabling direct high-side shunt monitoring at the positive rail without level-shifting circuitry.
It integrates phase-reversal protection, EMI-filtered inputs, and MUX-friendly behavior - allowing stable operation in multiplexed sensor arrays and noisy industrial environments. The device is unity-gain stable and specified across full 4.5 V to 24 V single-supply or ±2.25 V to ±12 V dual-supply operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset Voltage | ±1 μV (max) - enables sub-μV-level DC accuracy in precision measurement without calibration. |
| Offset Drift | ±0.01 μV/°C (max) - ensures <0.85 μV total drift over full –40°C to +125°C range, critical for uncalibrated field-deployed sensors. |
| Supply Range | 4.5 V to 24 V single-supply - supports direct interface with 12 V/24 V industrial buses and PC power supplies without regulation. |
| Quiescent Current | 90 µA per amplifier - allows continuous operation in battery-powered metering and portable instrumentation for >10-year service life. |
| Gain Bandwidth | 750 kHz - sufficient for anti-aliasing filtering, active sensor compensation, and closed-loop control up to ~100 kHz. |
| Slew Rate | 0.35 V/µs - supports clean step response for 1-V signals within 7.5 µs (0.1% settling), suitable for fast-sampling ADC drivers. |
| Input Common-Mode Range | (V–) – 0.2 V to (V+) + 0.2 V - permits high-side current sensing at the positive rail without external bias networks. |
Pinout & Package
OPA186 is available in two production packages: 8-pin SOIC (D) and 5-pin SOT-23 (DBV). Both variants share identical electrical functionality and pin mapping logic, with NC pins omitted in the smaller DBV variant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| –IN (Pin 2 in D / Pin 2 in DBV) | Inverting input | Accepts feedback network connection; supports standard inverting amplifier and transimpedance configurations. |
| +IN (Pin 3 in D / Pin 3 in DBV) | Noninverting input | Direct sensor or reference signal interface; rail-to-rail capable up to (V+) + 0.2 V. |
| OUT (Pin 1 in D / Pin 1 in DBV) | Amplifier output | Rail-to-rail swing: within 5 mV of rails (no load), enabling full dynamic range utilization with low-voltage ADCs. |
| V– (Pin 4 in D / Pin 4 in DBV) | Negative supply | Supports ground-referenced or split-supply operation; minimum supply voltage 4.5 V (single) or ±2.25 V (dual). |
| V+ (Pin 5 in D / Pin 5 in DBV) | Positive supply | Maximum 24 V rating - compatible with industrial 24 VDC systems and wide-input DC/DC converters. |
| NC (Pins 6–8 in D) | No connection | Unused pins in SOIC-8 package; must be left floating - no internal connection or thermal function. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input with overvoltage tolerance | Common-mode range extends 200 mV beyond V+ and V– - eliminates need for external level shifters in high-side current sensing. |
| Phase-reversal protection | Output clamps to appropriate rail instead of inverting when input exceeds common-mode limits - prevents system latch-up in noninverting configurations. |
| EMI-filtered inputs | Integrated RF/EMI rejection suppresses interference from wireless comms and digital switching noise - improves reliability in mixed-signal PCBs. |
| MUX-friendly architecture | No output glitches or settling anomalies during channel switching - enables stable multi-sensor scanning without post-switching delays. |
| Zero-drift chopper with notch filter | Eliminates 1/f noise and achieves flat voltage noise density (40 nV/√Hz) - preserves SNR in low-frequency sensor applications like strain gauges. |
Applications
| Flow Transmitter | Pressure Transmitter |
|---|---|
Use Scenario: Amplifies low-level mV output from differential pressure sensors in HVAC and industrial process control. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with programmable gain and offset trimming. Use Value: 0.01 μV/°C drift ensures <±0.05% FS error over temperature - meets ANSI/ISA-75.25 accuracy requirements for Class A transmitters. |
Use Scenario: Conditions piezoresistive bridge outputs in automotive and industrial pressure modules. IC Role / Device Role / Timing Role: Rail-to-rail input buffer and gain stage before 24-bit ΣΔ ADC. Use Value: 1 μV offset enables <0.005% reading error at 100 mV full-scale - supports 0.05% accuracy class without factory calibration. |
| Electricity Meter | Merchant Battery Charger |
Use Scenario: Measures shunt voltage for active energy calculation in Class 0.2 and 0.5 smart meters. IC Role / Device Role / Timing Role: High-side current sense amplifier feeding metrology ADC. Use Value: Input common-mode up to (V+) + 0.2 V allows direct connection to 24 V bus - removes isolation amplifier cost and latency. |
Use Scenario: Monitors charge current and battery voltage in multi-cell Li-ion chargers for e-bikes and power tools. IC Role / Device Role / Timing Role: Low-power, high-accuracy analog front-end for state-of-charge estimation. Use Value: 90 µA IQ enables continuous monitoring during standby - extends battery shelf life while maintaining ±1 mA current measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA182DR | Higher GBW (10 MHz), higher IQ (440 µA), same 1 μV offset but 0.02 μV/°C drift. | Better for high-speed active filters or fast-settling data acquisition; less suitable for ultra-low-power battery systems. | Select OPA182DR when bandwidth >1 MHz is required and power budget allows ≥4× higher IQ. |
| LTC2057HS8#PBF | Lower drift (0.005 μV/°C), higher IQ (125 µA), wider supply (2.7–18 V), no RRI capability. | Superior long-term stability for lab-grade instruments; cannot perform high-side sensing due to limited CMVR. | Choose LTC2057HS8#PBF where ultimate drift performance outweighs rail-to-rail input and 24 V support. |
Compared with OPA186, OPA182DR trades ultra-low power for speed, while LTC2057HS8#PBF sacrifices input voltage range and supply flexibility for lower drift - making OPA186 the optimal balance for 24 V industrial sensing with strict power constraints.
Availability
OPA186 is available at Aetrix Electronics and suitable for flow transmitter design, pressure transmitter calibration, and electricity meter production requiring stable component supply across extended temperature and voltage ranges.
Supply support for OPA186 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog and embedded processing technologies, with decades of innovation in precision amplifiers and signal chain solutions.
The OPAx186 family was designed specifically for high-accuracy, low-power industrial sensing - targeting applications demanding zero-drift performance at 24 V without sacrificing rail-to-rail input flexibility or EMI robustness.
FAQ
What is the maximum supply voltage for OPA186?
The absolute maximum supply voltage for OPA186 is 26 V, but the recommended operating range is 4.5 V to 24 V. Operating at 24 V enables direct compatibility with industrial 24 VDC systems, while staying safely within the 26 V limit ensures long-term reliability and avoids overstress conditions defined in Section 6.1 of the SBOS968C datasheet.
Does OPA186 support high-side current sensing?
Yes, OPA186 supports high-side current sensing because its rail-to-rail input common-mode range extends to (V+) + 0.2 V. This allows direct connection to the positive rail of a shunt resistor without external level-shifting circuitry - a key capability confirmed in Figure 5-1 and Section 7.3.1 of the OPA186 datasheet.
What package options are available for OPA186?
OPA186 is offered in two production packages: 8-pin SOIC (D) and 5-pin SOT-23 (DBV). Both are listed as active in the TI product folder and mechanical data sheet (Section 10), with thermal metrics provided for each. The SOIC-8 includes three NC pins; the SOT-23-5 omits them to minimize footprint.
How does OPA186 handle EMI in noisy environments?
OPA186 integrates on-chip EMI filtering on both inputs, as documented in Section 7.3.4 and Figure 6-38 (EMIRR vs frequency). This design reduces susceptibility to RF interference from sources like GSM, Wi-Fi, and switching regulators - improving measurement integrity in densely populated industrial PCBs without requiring external RC filters.
Is OPA186 unity-gain stable?
Yes, OPA186 is unity-gain stable, as explicitly stated in Section 7.1 and verified by phase margin measurements in Figure 6-34 (≥45° at 100 pF capacitive load). This allows safe use in voltage followers, active filters, and transimpedance amplifiers without external compensation components.
OPA186DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- Zero-Drift
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Chopper (Zero-Drift)
- Number of Circuits:
- 1
- Output Type:
- Single Ended, Rail-to-Rail
- Slew Rate:
- 0.35V/µs
- Gain Bandwidth Product:
- 750 kHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 5 pA
- Voltage - Input Offset:
- 1 µV
- Current - Supply:
- 90µA
- Current - Output / Channel:
- 20 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 24 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA186DR FAQ
1.How can I place an order for OPA186DR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA186DR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for OPA186DR reliable?
The price and inventory of OPA186DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA186DR is usually 5 days.
3.What payment methods are accepted for OPA186DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA186DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA186DR?
OPA186DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA186DR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for OPA186DR?
For technical support, including OPA186DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA186DR requirements.
6.How does Aetrix verify that OPA186DR is sourced from the original manufacturer or authorized distributors?
All OPA186DR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that OPA186DR meets industry standards.
7.What is the process for return or replacement of OPA186DR?
All OPA186DR units undergo pre-shipment inspection (PSI). If there is an issue with OPA186DR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The OPA186DR part is unused and in its original packaging.
Return procedure for OPA186DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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