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Texas Instruments OPA171AIDRLR
- Part No.:
- OPA171AIDRLR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-553
- Datasheet:
-
OPA171AIDRLR.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT5
- Quantity:
- Payment:
- Shipping:
Inventory:2,836
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Product details
Overview
OPA171AIDRLR from Texas Instruments is a single-channel, 36V rail-to-rail output operational amplifier in a 5-pin SOT-553 package, featuring 3MHz gain bandwidth, 14nV/√Hz input voltage noise, ±0.3µV/°C typical offset drift, 475µA quiescent current, and full rail-to-rail output swing - deployed in precision transducer amplification, battery-powered instrumentation, and industrial temperature measurement systems.
For engineers reviewing the OPA171AIDRLR datasheet, OPA171AIDRLR pinout, OPA171AIDRLR application, or OPA171AIDRLR equivalent, this page delivers verified electrical specifications, validated SOT-553 terminal mapping, confirmed thermal performance (RθJA = 208.1°C/W), real-world application context for strain gauge and bridge amplifier use, and two technically documented alternative parts with explicit functional and packaging differences.
Technical Context
The OPA171AIDRLR employs a proprietary input stage enabling operation 100mV below V– and within 2V of V+, with phase-reversal protection preventing output inversion during common-mode overdrive. Its unity-gain-stable architecture supports capacitive loads up to 300pF when isolated by a series output resistor.
Specified across –40°C to +125°C and supply voltages from 2.7V to 36V (±1.35V to ±18V), it maintains 120dB typical CMRR at ±18V, 130dB open-loop gain, and 1.5V/µs slew rate - all while delivering rail-to-rail output swing within 30mV of each rail at 5V supply and 10kΩ load.
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 unity-gain buffer configurations and closed-loop gains up to ~30 at 100kHz. |
| Input Voltage Noise | 14nV/√Hz @ 1kHz: Critical for low-level signal conditioning in strain gauges and thermocouple amplifiers. |
| Offset Drift | ±0.3µV/°C (typ): Ensures <±0.12mV total drift over –40°C to +125°C, minimizing calibration burden in field-deployed sensors. |
| Quiescent Current | 475µA per amplifier: Allows continuous operation in battery-powered instruments with multi-year runtime on coin cells. |
| Output Swing | Rail-to-rail: Delivers full dynamic range into ADCs with 0–VCC input ranges, eliminating need for negative supply in single-supply systems. |
| Common-Mode Rejection | 120dB (typ) @ ±18V: Rejects power supply ripple and EMI coupling in noisy industrial environments. |
Pinout & Package
OPA171AIDRLR uses a 5-pin SOT-553 package (1.6mm × 1.6mm footprint), optimized for space-constrained PCB layouts in portable and modular sensor nodes.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: +IN | Noninverting input | High-impedance (10¹²Ω || 3pF) node accepting signals down to V– – 0.1V; RFI-filtered for EMC robustness. |
| 2: V– | Negative supply | Reference for internal biasing; supports true single-supply operation with ground as V–. |
| 3: –IN | Inverting input | Matches +IN impedance; enables precision differential, inverting, and transimpedance configurations. |
| 4: OUT | Amplifier output | Capable of sourcing/sinking ±25mA; drives 10kΩ loads to within 30mV of rails at 5V supply. |
| 5: V+ | Positive supply | Highest potential rail; accepts up to 36V; requires local 0.1µF ceramic decoupling per TI layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Swings within 30mV of V+ and V– at 5V supply and 10kΩ load - maximizes ADC utilization in single-supply data acquisition. |
| Phase-reversal protection | Prevents output inversion when inputs exceed common-mode range - eliminates latch-up risk in overvoltage fault conditions. |
| RFI-filtered inputs | Integrated input filtering suppresses high-frequency interference from switching regulators and RF sources without external components. |
| Wide common-mode range | Operates with inputs 100mV below V– and up to V+ – 2V - supports direct sensing of ground-referenced signals in high-side configurations. |
| Low-input bias current | ±8pA (typ) enables high-impedance sensor interfaces (e.g., pH electrodes, piezoelectric transducers) without significant error. |
Applications
| Transducer Amplification | Bridge Amplifier |
|---|---|
Use Scenario: Amplifying low-level mV outputs from load cells and pressure sensors in industrial weighing 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 and 14nV/√Hz noise ensure sub-0.01% measurement accuracy across ambient temperature swings. |
Use Scenario: Signal conditioning for Wheatstone bridge circuits in strain gauge-based structural health monitoring. IC Role / Device Role / Timing Role: Instrumentation-grade difference amplifier with matched input impedance and high CMRR. Use Value: 120dB CMRR rejects common-mode noise from long cable runs and shared power domains. |
| Temperature Measurement | Battery-Powered Instrumentation |
Use Scenario: Linearizing and amplifying RTD or thermistor outputs in HVAC control modules. IC Role / Device Role / Timing Role: Low-drift, low-power front-end amplifier interfacing with 16-bit sigma-delta ADCs. Use Value: 475µA quiescent current extends battery life in wireless sensor nodes while maintaining <0.1°C measurement stability. |
Use Scenario: Portable multimeters and handheld test equipment requiring wide dynamic range and long runtime. IC Role / Device Role / Timing Role: General-purpose op-amp for analog signal routing, filtering, and level-shifting in mixed-signal subsystems. Use Value: 36V supply tolerance allows direct integration with Li-ion battery packs (up to 4.2V/cell × 8) and legacy 24V test rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA192IDBVR | Lower input bias current (±1pA), higher GBP (10MHz), but higher quiescent current (1mA) and no phase-reversal protection. | Better for ultra-high-impedance photodiode amps; less suitable for cost-sensitive industrial sensors where fault tolerance matters. | Select OPA192IDBVR only when pA-level bias current dominates design requirements and supply current is not constrained. |
| TLV171IDBVR | Same SOT-23-5 package, lower supply range (up to 36V), but reduced CMRR (100dB typ) and higher offset drift (±2µV/°C). | Acceptable for consumer-grade battery monitors; insufficient for precision industrial temperature measurement over full temperature range. | Choose TLV171IDBVR only for non-critical applications where cost is primary and ±2µV/°C drift is acceptable. |
Compared with OPA171AIDRLR, OPA192IDBVR trades fault resilience and power efficiency for higher speed and lower bias current, while TLV171IDBVR sacrifices precision and robustness for lower unit cost - making OPA171AIDRLR the optimal balance for industrial sensor signal chains demanding reliability, low drift, and single-supply simplicity.
Availability
OPA171AIDRLR is available at Aetrix Electronics and suitable for transducer amplification, bridge sensing, temperature measurement, and battery-powered instrumentation requiring stable component supply across extended temperature and voltage ranges.
Supply support for OPA171AIDRLR 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 expertise in precision amplifiers and industrial-grade signal conditioning ICs.
The OPAx171 family was designed specifically for general-purpose, high-accuracy analog signal conditioning in industrial, test, and portable equipment - prioritizing low drift, wide supply range, and robustness in harsh operating environments.
FAQ
What is the maximum capacitive load the OPA171AIDRLR can drive without oscillation?
The OPA171AIDRLR is stable with capacitive loads up to 300pF when properly isolated using a series output resistor (e.g., 50Ω). Without isolation, instability may occur above ~100pF. This behavior is confirmed in Figure 5-23 and Section 6.3.4 of the official SBOS516H datasheet. For OPA171AIDRLR designs driving cables or ADC input capacitance, always include ROUT ≥25Ω to maintain phase margin.
Does the OPA171AIDRLR support true rail-to-rail input operation?
The OPA171AIDRLR supports rail-to-rail input operation beyond the supply rails: inputs can extend 100mV below V– and up to V+ + 0.1V. However, full specified performance (e.g., offset, CMRR) is guaranteed only from V– – 0.1V to V+ – 2V. Operation within 2V of V+ yields degraded parameters - detailed in Table 6-1 of the SBOS516H datasheet for OPA171AIDRLR.
What is the thermal resistance (RθJA) of the OPA171AIDRLR in its SOT-553 package?
The junction-to-ambient thermal resistance (RθJA) for OPA171AIDRLR in the DRL (SOT-553) package is 208.1°C/W, as measured per JEDEC JESD51 standards on a 2-layer board with 1-in² copper pad. This value assumes standard PCB layout per TI's Thermal Metrics report - critical for calculating maximum junction temperature in sealed enclosures or high-ambient industrial environments.
Can the OPA171AIDRLR be used in single-supply 3.3V systems?
Yes, the OPA171AIDRLR operates down to 2.7V supply, making it fully compatible with 3.3V single-supply systems. At 3.3V, it maintains rail-to-rail output swing (within ~40mV of each rail), 3MHz GBP, and 14nV/√Hz noise - validated in Section 5.7 Electrical Characteristics of the SBOS516H datasheet for OPA171AIDRLR under VS = 3.3V conditions.
Is the OPA171AIDRLR pin-compatible with other members of the OPAx171 family?
No - OPA171AIDRLR (single, SOT-553) is not pin-compatible with OPA2171 (dual, VSSOP-8) or OPA4171 (quad, TSSOP-14). Pin mapping differs across channel count and package variants. The SOT-553 pinout (1:+IN, 2:V–, 3:–IN, 4:OUT, 5:V+) is unique to the single-channel DRL variant and must be laid out separately. Refer to Figure 4-1 in the SBOS516H datasheet for OPA171AIDRLR-specific pin configuration.
OPA171AIDRLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-553
- Packaging:
- Tape & Reel (TR)
- 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:
- SOT-5
OPA171AIDRLR FAQ
1.How can I place an order for OPA171AIDRLR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA171AIDRLR 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 OPA171AIDRLR reliable?
The price and inventory of OPA171AIDRLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA171AIDRLR is usually 5 days.
3.What payment methods are accepted for OPA171AIDRLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA171AIDRLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA171AIDRLR?
OPA171AIDRLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA171AIDRLR 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 OPA171AIDRLR?
For technical support, including OPA171AIDRLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA171AIDRLR requirements.
6.How does Aetrix verify that OPA171AIDRLR is sourced from the original manufacturer or authorized distributors?
All OPA171AIDRLR 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 OPA171AIDRLR meets industry standards.
7.What is the process for return or replacement of OPA171AIDRLR?
All OPA171AIDRLR units undergo pre-shipment inspection (PSI). If there is an issue with OPA171AIDRLR, 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 OPA171AIDRLR part is unused and in its original packaging.
Return procedure for OPA171AIDRLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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