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Texas Instruments OPA171AIDRLT
- Part No.:
- OPA171AIDRLT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-553
- Datasheet:
-
OPA171AIDRLT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT SOT5
- Quantity:
- Payment:
- Shipping:
Inventory:5,224
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Product details
Overview
OPA171AIDRLT from Texas Instruments is a single-channel, 36V general-purpose operational amplifier in a 5-pin SOT-553 package. It delivers rail-to-rail output, ±0.3µV/°C typical offset drift, 14nV/√Hz input voltage noise at 1kHz, 3MHz gain bandwidth, and operates from 2.7V to 36V supply. It is used in precision transducer amplification and battery-powered instrumentation where low quiescent current (475µA) and wide common-mode range are critical.
For engineers reviewing the OPA171AIDRLT datasheet, OPA171AIDRLT pinout, OPA171AIDRLT application, or OPA171AIDRLT equivalent, key selection criteria include its rail-to-rail output swing within 30mV of rails at 5V, input operation 100mV below V– and within 2V of V+, stability with up to 300pF capacitive loads, and guaranteed operation from –40°C to +125°C.
Technical Context
The OPA171AIDRLT uses a proprietary input stage enabling full rail-to-rail input operation beyond V+ by 100mV (with reduced performance within 2V of V+) and down to V– – 100mV. Its internal phase-reversal protection prevents output inversion when inputs exceed common-mode limits - a critical feature for noninverting configurations in power module tracking circuits.
It achieves 120dB typical CMRR at ±18V supply and maintains >110dB open-loop gain across –40°C to +125°C. The device is stable driving capacitive loads up to 300pF without external compensation, and its 1.5V/µs slew rate supports 10V step settling to 0.01% in 10µs under ±18V conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 36V (±1.35V to ±18V): supports single-supply industrial sensors and dual-supply test equipment without redesign. |
| Gain Bandwidth Product | 3MHz: enables stable unity-gain buffer or G=10 amplification up to ~300kHz for precision signal conditioning. |
| Input Voltage Noise | 14nV/√Hz at 1kHz: ensures minimal added noise in strain gauge and temperature measurement front-ends. |
| Offset Drift | ±0.3µV/°C typical: guarantees <2µV total drift over –40°C to +125°C, critical for uncalibrated embedded systems. |
| Quiescent Current | 475µA per amplifier: allows continuous operation in 10-year battery-powered instruments with µA-level sleep budgets. |
| Common-Mode Range | V– – 0.1V to V+ – 2V: permits direct interfacing with 0–5V or 0–24V sensor outputs without level-shifting circuitry. |
| Output Swing | Within 30mV of rails at 5V (RL = 10kΩ): maximizes dynamic range in low-voltage data acquisition systems. |
Pinout & Package
OPA171AIDRLT is housed in a 5-pin SOT-553 package (1.6mm × 1.6mm), optimized for space-constrained PCB layouts in portable and modular instrumentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 1) | Noninverting input | Accepts high-impedance sensor signals (e.g., thermocouples, bridge arms); input bias current ≤8pA minimizes offset error. |
| –IN (Pin 3) | Inverting input | Configures closed-loop gain via feedback network; RFI filtering suppresses EMI in noisy industrial environments. |
| OUT (Pin 4) | Amplifier output | Rail-to-rail capable; drives 10kΩ loads directly; short-circuit protected to ±35mA (sink) / +25mA (source). |
| V+ (Pin 5) | Positive supply | Highest potential supply rail; must be decoupled with 0.1µF ceramic capacitor placed ≤2mm from pin. |
| V– (Pin 2) | Negative supply | Lowest potential supply rail; supports true single-supply operation down to 2.7V or split supplies as low as ±1.35V. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail output | Delivers full dynamic range at low supply voltages (e.g., 3.3V MCU interfaces), reducing need for level-shifting ICs. |
| RFI-filtered inputs | Integrated input-stage filtering rejects high-frequency interference from switching power supplies and RF sources without external RC networks. |
| No phase reversal | Prevents catastrophic output inversion during overvoltage transients on sensor inputs - essential for safety-critical monitoring loops. |
| Wide supply range | Eliminates separate voltage regulators in multi-rail systems: same part works in 3.3V IoT nodes and 24V industrial PLC analog modules. |
| Stable with 300pF load | Drives long traces, cables, or ADC input capacitance directly without isolation resistors or compensation components. |
Applications
| Transducer Amplification | Bridge Sensor Conditioning |
|---|---|
Use Scenario: Amplifying low-level mV outputs from pressure or load-cell transducers in HVAC control panels. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with <2µV/°C drift ensuring calibration stability across operating temperature. Use Value: Enables 16-bit effective resolution without periodic recalibration, reducing field maintenance costs. | Use Scenario: Signal conditioning for Wheatstone bridge strain gauges in structural health monitoring systems. IC Role / Device Role / Timing Role: Instrumentation amplifier front-end with 120dB CMRR rejecting common-mode noise from motor drives nearby. Use Value: Maintains >100dB SNR even when bridge excitation shares noisy 24V rail with actuators. |
| Battery-Powered Instrumentation | Precision Integrator Circuits |
Use Scenario: Portable multimeter front-end requiring 10-year battery life and sub-µV offset stability. IC Role / Device Role / Timing Role: Low-power, low-drift op-amp in auto-zeroed DC amplifier path with 475µA IQ. Use Value: Extends CR2032 battery life to >8 years in always-on measurement mode. | Use Scenario: Analog integrator in energy metering IC reference designs for kWh accumulation. IC Role / Device Role / Timing Role: Ultra-low-input-bias-current (8pA) integrator core minimizing leakage-induced integration error. Use Value: Limits integration drift to <0.1% error over 1-hour period at 25°C, meeting IEC 62053 accuracy class. |
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 vs 8pA), higher GBP (10MHz), higher IQ (1mA), SOIC-5/SOT-23-5 only | Better for femtoampere photodiode amps; less suitable for ultra-low-power battery systems | Select OPA192IDBVR only if >10MHz bandwidth or <1pA IB required; otherwise OPA171AIDRLT offers superior power/performance trade-off. |
| TLV9061IDCKR | Lower supply voltage (1.8V min), lower IQ (500µA), smaller 5-pin SC70 package, but lower CMRR (105dB) and no phase-reversal protection | Optimized for 1.8–5.5V portable devices; lacks robustness in industrial 24V environments | Choose TLV9061IDCKR for cost-sensitive consumer electronics; avoid in safety-critical or high-CMRR applications where OPA171AIDRLT's 120dB CMRR and phase-reversal immunity are mandatory. |
Compared with OPA192IDBVR and TLV9061IDCKR, OPA171AIDRLT uniquely balances 36V operation, 120dB CMRR, phase-reversal immunity, and 475µA quiescent current - making it the only choice for industrial-grade transducer amps requiring both wide supply range and low power.
Availability
OPA171AIDRLT is available at Aetrix Electronics and suitable for transducer amplification, battery-powered instrumentation, and precision integrator circuits requiring stable component supply across automotive, industrial, and medical OEM programs.
Supply support for OPA171AIDRLT 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, with deep expertise in precision amplifiers and industrial signal chains.
The OPAx171 family was designed specifically for general-purpose industrial and instrumentation applications demanding wide supply range, low drift, and robust input behavior - not just generic op-amp replacement.
FAQ
What is the maximum capacitive load the OPA171AIDRLT can drive without oscillation?
The OPA171AIDRLT is specified stable with capacitive loads up to 300pF under standard test conditions (RL = 10kΩ, VS = ±18V). This allows direct connection to ADC input capacitance or long PCB traces without external isolation resistors. For loads exceeding 300pF, a series resistor (e.g., 50Ω) between OUT and the load restores stability. The OPA171AIDRLT datasheet Figure 5-23 confirms overshoot remains <5% at 300pF with G = 1 configuration.
Does the OPA171AIDRLT support true rail-to-rail input operation?
The OPA171AIDRLT supports input voltages from V– – 0.1V to V+ – 2V for full-specified performance. It can accept inputs up to V+ + 0.1V (i.e., 100mV beyond the positive rail) but with degraded parameters - including increased offset voltage (up to 7mV), reduced CMRR (65dB), and lower GBW (0.7MHz) - as documented in Table 6-1 of the OPA171AIDRLT datasheet.
What is the thermal resistance (RθJA) of the OPA171AIDRLT in its SOT-553 package?
The junction-to-ambient thermal resistance (RθJA) for the OPA171AIDRLT in the DRL (SOT-553) package is 208.1°C/W, as measured per JEDEC JESD51-2 standards on a 2-layer board with 1-in² copper pad. This value assumes standard PCB layout; actual thermal performance improves with additional copper pour or thermal vias. The OPA171AIDRLT's maximum junction temperature remains 150°C under recommended operating conditions.
Can the OPA171AIDRLT replace the OPA2171 or OPA4171 in a design?
No - the OPA171AIDRLT is a single-channel amplifier and cannot functionally replace dual (OPA2171) or quad (OPA4171) versions. While all three share identical electrical specifications per channel, pin count, footprint, and channel count differ fundamentally. Replacing OPA2171 requires two OPA171AIDRLT units plus PCB layout changes; OPA4171 replacement would require four units and significant board rework.
Is the OPA171AIDRLT qualified for automotive applications?
The OPA171AIDRLT is not AEC-Q200 qualified. It is rated for industrial temperature range (–40°C to +125°C) and intended for industrial, medical, and commercial applications. For automotive use, TI offers the pin-compatible OPA171QDRQ1 (AEC-Q100 Grade 1, –40°C to +125°C), which undergoes additional stress testing and has controlled manufacturing flow - the OPA171AIDRLT must not be substituted in automotive designs without full qualification revalidation.
OPA171AIDRLT 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
OPA171AIDRLT FAQ
1.How can I place an order for OPA171AIDRLT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA171AIDRLT 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 OPA171AIDRLT reliable?
The price and inventory of OPA171AIDRLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA171AIDRLT is usually 5 days.
3.What payment methods are accepted for OPA171AIDRLT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA171AIDRLT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA171AIDRLT?
OPA171AIDRLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA171AIDRLT 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 OPA171AIDRLT?
For technical support, including OPA171AIDRLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA171AIDRLT requirements.
6.How does Aetrix verify that OPA171AIDRLT is sourced from the original manufacturer or authorized distributors?
All OPA171AIDRLT 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 OPA171AIDRLT meets industry standards.
7.What is the process for return or replacement of OPA171AIDRLT?
All OPA171AIDRLT units undergo pre-shipment inspection (PSI). If there is an issue with OPA171AIDRLT, 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 OPA171AIDRLT part is unused and in its original packaging.
Return procedure for OPA171AIDRLT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA171AIDRLT Tags
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