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Texas Instruments OPA171AID
- Part No.:
- OPA171AID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA171AID.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:861
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Product details
Overview
OPA171AID from Texas Instruments is a single-channel, 36V rail-to-rail output operational amplifier in 5-pin SOT-553 package, featuring 3MHz gain bandwidth, 14nV/√Hz input voltage noise, ±0.3µV/°C offset drift (typ), 120dB CMRR, and 475µA quiescent current - deployed in precision transducer amplification, battery-powered instrumentation, and industrial temperature measurement systems.
For engineers reviewing the OPA171AID datasheet, OPA171AID pinout, OPA171AID application, or OPA171AID equivalent, this page delivers verified electrical specifications, thermal performance data, real-world input/output voltage range behavior, and validated alternative options for design-in continuity and supply chain resilience.
Technical Context
The OPA171AID operates across a wide supply range of 2.7V to 36V (±1.35V to ±18V) and maintains full rail-to-rail input operation 100mV beyond the positive rail - with reduced performance only within 2V of V+. Its RFI-filtered inputs and phase-reversal protection prevent output inversion when common-mode voltage exceeds specified limits.
It achieves stable operation with capacitive loads up to 300pF and supports high-impedance sensor interfaces via 8pA input bias current and 10¹²Ω common-mode input impedance. Specified from –40°C to +125°C, it delivers consistent 3MHz GBP and 1.5V/µs slew rate across its full operating temperature and supply range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 36V (±1.35V to ±18V): Enables direct interface with 3.3V, 5V, 12V, 24V, and 36V industrial rails without level-shifting. |
| Gain Bandwidth Product | 3MHz: Supports stable closed-loop gain ≥10 at 300kHz or unity-gain buffer operation up to 3MHz with minimal phase margin loss. |
| Input Offset Drift | ±0.3µV/°C (typ): Ensures <1.2µV total drift over –40°C to +125°C, critical for uncalibrated DC-coupled sensor front-ends. |
| Input Voltage Noise | 14nV/√Hz @ 1kHz: Low-noise performance suitable for µV-level strain gauge and thermocouple signal conditioning. |
| Common-Mode Rejection | 120dB (typ, ±18V): Rejects >1M:1 common-mode interference in noisy industrial environments with floating sensors. |
| Quiescent Current | 475µA per amplifier: Enables multi-year battery life in portable test equipment and low-power IoT edge nodes. |
| Rail-to-Rail Output | Swings within 30mV of rails @ 5V/10kΩ: Maximizes dynamic range in single-supply systems without negative rail generation. |
Pinout & Package
OPA171AID is packaged in a 5-pin SOT-553 (DRL) micro-package measuring 1.6mm × 1.6mm, optimized for space-constrained PCB layouts in portable and modular instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+IN) | Noninverting input | High-impedance node (10¹²Ω || 3pF) accepting signals down to V– – 0.1V; RFI-filtered for EMI robustness. |
| 2 (V–) | Negative supply | Reference for internal biasing; supports true single-supply operation with input common-mode extending to V–. |
| 3 (–IN) | Inverting input | Matches +IN in impedance and noise; enables precision differential, inverting, and transimpedance configurations. |
| 4 (OUT) | Output | Rail-to-rail capable stage driving ≥10kΩ loads; stable with ≤300pF capacitance; short-circuit protected (±35mA). |
| 5 (V+) | Positive supply | Highest potential rail; supplies internal op-amp core and output stage; accepts up to 40V absolute max rating. |
Key Features
| Feature | Design Value |
|---|---|
| RFI-filtered inputs | Integrated EMI suppression enables reliable operation in motor drives, switching power supplies, and RF-dense industrial enclosures. |
| No phase reversal | Internal protection prevents output inversion when input exceeds common-mode range - eliminates latch-up risk in overvoltage fault conditions. |
| Extended input common-mode range | Operates 100mV below V– and up to V+ + 0.1V, enabling direct connection to grounded sensors and high-side current sense without external biasing. |
| Low-input bias current | 8pA (typ) allows use with high-Z sources (e.g., pH electrodes, piezoelectric sensors) without significant offset error or signal attenuation. |
| Wide temperature specification | Guaranteed performance from –40°C to +125°C supports deployment in automotive engine bays, industrial PLCs, and outdoor metering hardware. |
Applications
| Transducer Amplification | Temperature Measurement |
|---|---|
Use Scenario: Amplifying low-level mV outputs from load cells, pressure sensors, or RTDs in factory automation systems. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with ultra-low drift and noise to preserve signal integrity before ADC digitization. Use Value: ±0.3µV/°C drift ensures <±2.5µV total offset shift over full industrial temperature range, eliminating need for periodic recalibration. |
Use Scenario: Signal conditioning for 3-wire RTD bridges in HVAC controllers and process monitoring terminals. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end with rail-to-rail output driving SAR ADC reference buffers. Use Value: 14nV/√Hz noise and 120dB CMRR reject thermal EMF and ground-loop interference in long-sensor-cable installations. |
| Battery-Powered Instruments | Merchant Power Supplies |
Use Scenario: Portable multimeters, handheld calibrators, and field service testers requiring multi-year battery life. IC Role / Device Role / Timing Role: Low-power analog front-end for precision voltage/current measurement channels. Use Value: 475µA quiescent current enables >5-year operation on two AA alkaline cells in sleep-active duty cycling. |
Use Scenario: Voltage feedback and current sensing in AC/DC adapters and open-frame PSUs for consumer electronics. IC Role / Device Role / Timing Role: Error amplifier in isolated flyback or forward converter control loops. Use Value: 3MHz GBP and 1.5V/µs slew rate support fast transient response and stable regulation under dynamic load changes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar general-purpose operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA192IDBVR | Lower input bias current (1pA), higher GBP (10MHz), higher supply current (1mA), SOIC-8/SOT-23-5 packaging | Better suited for femtoampere photodiode or electrophysiology front-ends; less optimal for ultra-low-power battery designs | Select OPA192IDBVR when sub-pA bias and >5MHz bandwidth outweigh quiescent power constraints. |
| TLV171IDBVR | Lower voltage range (2.7V–36V same), lower IQ (190µA), lower GBP (1.2MHz), same SOT-23-5/DRL footprint | Optimized for cost-sensitive, low-bandwidth sensor interfaces where 3MHz is unnecessary | Choose TLV171IDBVR for budget-constrained industrial controls where 1.2MHz bandwidth suffices and 190µA IQ extends battery life further. |
Compared with OPA171AID, OPA192IDBVR trades 2.1× higher supply current for 3.3× greater bandwidth and 8× lower input bias current - ideal for high-speed, ultra-high-impedance sensing; TLV171IDBVR reduces IQ by 60% but cuts GBP by 60%, making it optimal for static or slow-varying DC measurements with tighter BOM cost targets.
Availability
OPA171AID is available at Aetrix Electronics and suitable for transducer amplification, temperature measurement, and battery-powered instrumentation requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.
Supply support for OPA171AID 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 delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The OPAx171 family was designed for general-purpose precision amplification in harsh, wide-supply industrial environments - emphasizing low drift, rail-to-rail operation, and robustness against EMI and overvoltage stress.
FAQ
What is the maximum capacitive load the OPA171AID can drive stably?
The OPA171AID is characterized for stable operation with capacitive loads up to 300pF without external compensation. For loads exceeding this value, a series isolation resistor (e.g., 50Ω) between the output and capacitive node is recommended to maintain phase margin and prevent peaking or oscillation - as confirmed in TI's SBOS516H datasheet Figure 5-23 and Section 6.3.4.
Does the OPA171AID support true rail-to-rail input operation?
Yes - the OPA171AID supports input common-mode voltage from V– – 0.1V to V+ + 0.1V. Full rail-to-rail input is functional beyond V+, though performance (e.g., offset, CMRR) degrades within 2V of V+. This capability is explicitly documented in Section 6.3.2 and Table 6-1 of the OPA171AID datasheet.
What is the absolute maximum supply voltage rating for the OPA171AID?
The absolute maximum supply voltage for the OPA171AID is 40V across V+ and V– terminals, as stated in Section 5.1 Absolute Maximum Ratings of the SBOS516H datasheet. Operation above 36V violates recommended conditions and risks permanent damage, even if within absolute limits.
Is the OPA171AID pin-compatible with other members of the OPAx171 family?
No - the OPA171AID (single, SOT-553) is not pin-compatible with OPA2171 (dual, VSSOP-8/SOIC-8) or OPA4171 (quad, TSSOP-14/SOIC-14). Pin count, layout, and terminal assignments differ across channel counts and packages; only identical part numbers share pinout compatibility.
How does the OPA171AID handle input overvoltage conditions that cause phase reversal in other op-amps?
The OPA171AID incorporates internal phase-reversal protection. When input common-mode voltage exceeds the linear range, the output saturates toward the appropriate rail instead of inverting - preventing system latch-up or erroneous control signals. This behavior is verified in Figure 5-25 ("No Phase Reversal") of the official datasheet.
OPA171AID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.5V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 8 pA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 475µA
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA171AID FAQ
1.How can I place an order for OPA171AID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA171AID 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 OPA171AID reliable?
The price and inventory of OPA171AID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA171AID is usually 5 days.
3.What payment methods are accepted for OPA171AID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA171AID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA171AID?
OPA171AID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA171AID 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 OPA171AID?
For technical support, including OPA171AID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA171AID requirements.
6.How does Aetrix verify that OPA171AID is sourced from the original manufacturer or authorized distributors?
All OPA171AID 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 OPA171AID meets industry standards.
7.What is the process for return or replacement of OPA171AID?
All OPA171AID units undergo pre-shipment inspection (PSI). If there is an issue with OPA171AID, 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 OPA171AID part is unused and in its original packaging.
Return procedure for OPA171AID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA171AID Tags
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LM358DR
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