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Texas Instruments OPA4171AQDRQ1
- Part No.:
- OPA4171AQDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4171AQDRQ1.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:5,445
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Product details
Overview
OPA4171AQDRQ1 from Texas Instruments is a quad-channel, AEC-Q100 Grade 1 qualified automotive operational amplifier with rail-to-rail output, 3 MHz gain bandwidth, ±0.3 µV/°C typical offset drift, 14 nV/√Hz input voltage noise at 1 kHz, and operation from 2.7 V to 36 V single supply - used in precision transducer signal conditioning within battery-powered vehicle control modules.
For engineers reviewing the OPA4171AQDRQ1 datasheet, OPA4171AQDRQ1 pinout, OPA4171AQDRQ1 application, or OPA4171AQDRQ1 equivalent, key selection criteria include its automotive temperature range (–40°C to +125°C), HBM ESD rating of ±2 kV, CDM rating of ±1 kV, 475 µA per amplifier quiescent current, and SOIC-14 package compatibility with high-channel-density analog front-ends.
Technical Context
The OPA4171AQDRQ1 implements a robust bipolar-input architecture enabling rail-to-rail output swing while maintaining full common-mode input range down to 100 mV below V– and up to 2 V below V+. Its phase-reversal protection prevents output inversion when inputs exceed the linear common-mode range - critical for fault-tolerant sensor interfaces.
Stable with capacitive loads up to 300 pF, it supports direct connection to ADC input filters and long PCB traces without external isolation resistors. The quad configuration shares identical electrical specs across channels, ensuring matched performance in multi-sensor systems like four-quadrant bridge amplifiers or redundant temperature monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.7 V to 36 V single supply (±1.35 V to ±18 V dual) - enables direct integration into 12 V/24 V automotive power domains without LDO pre-regulation. |
| Gain Bandwidth | 3 MHz - supports stable closed-loop gain ≥10 up to ~300 kHz for anti-aliasing filter design in 100 ksps data acquisition. |
| Input Offset Drift | ±0.3 µV/°C typical - ensures <±0.5 mV total drift over –40°C to +125°C, critical for uncalibrated strain gauge measurements. |
| Input Voltage Noise | 14 nV/√Hz at 1 kHz - low enough to preserve SNR in millivolt-level thermocouple or RTD signal chains. |
| Quiescent Current | 475 µA per amplifier - allows four-channel operation at <2 mA total, suitable for always-on vehicle subsystems. |
| CMRR | 120 dB typical at ±18 V - rejects common-mode interference from noisy engine control unit (ECU) grounds. |
| ESD Rating | HBM ±2 kV, CDM ±1 kV - meets AEC-Q100 stress requirements for under-hood electronics handling. |
Pinout & Package
OPA4171AQDRQ1 is packaged in a 14-pin SOIC (D package) with 8.65 mm × 3.91 mm body size and standard JEDEC MS-012 footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, channel A | Accepts sensor signals referenced to system ground; supports common-mode range to V– – 0.1 V. |
| –IN A (Pin 2) | Inverting input, channel A | Used for precision differential gain configuration; matched with +IN A for <5 µV input offset. |
| OUT A (Pin 1) | Output, channel A | Rail-to-rail swing (V– + 0.35 V to V+ – 0.35 V); drives 10 kΩ loads directly into ADC reference buffers. |
| V+ (Pin 4) | Positive power supply | Connects to main 5 V, 12 V, or 24 V rail; decoupling capacitor required within 1 cm for stability. |
| V– (Pin 11) | Negative power supply | Typically tied to GND in single-supply use; supports true negative rail operation down to –18 V. |
| +IN B (Pin 5), –IN B (Pin 6), OUT B (Pin 7) | Channel B inputs/outputs | Electrically identical to Channel A; enables dual independent instrumentation paths on one IC. |
| +IN C (Pin 10), –IN C (Pin 9), OUT C (Pin 8) | Channel C inputs/outputs | Provides third isolated gain stage - e.g., for reference voltage buffering or auxiliary sensor channel. |
| +IN D (Pin 12), –IN D (Pin 13), OUT D (Pin 14) | Channel D inputs/outputs | Completes quad functionality; supports simultaneous processing of four bridge sensors or thermistor arrays. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation - eliminates derating calculations for engine bay or transmission control units. |
| No phase reversal on CM overvoltage | Prevents catastrophic output inversion during sensor short-circuits or ESD transients - improves functional safety compliance. |
| Stable with 300 pF capacitive load | Enables direct driving of RC anti-aliasing filters without series isolation resistors, reducing component count and board space. |
| Input range extends 100 mV beyond rails | Allows safe overvoltage tolerance during power sequencing or load dump events without latch-up or damage. |
| Low 10 pA input bias current | Minimizes voltage error in high-impedance pH electrode or piezoelectric sensor interfaces. |
Applications
| Bridge Amplifier | Temperature Measurement |
|---|---|
Use Scenario: Amplifying differential output of a 350 Ω Wheatstone bridge in an automotive suspension load cell. IC Role / Device Role / Timing Role: Quad OPA4171AQDRQ1 configures two channels as precision instrumentation amps (INA) and two as reference buffers and filtering stages. Use Value: 0.3 µV/°C drift and 14 nV/√Hz noise ensure <0.1% full-scale error over temperature without calibration. | Use Scenario: Signal conditioning for PT100 RTD sensors in battery thermal management systems. IC Role / Device Role / Timing Role: One channel provides constant-current excitation; others condition and filter ratiometric voltage outputs. Use Value: Rail-to-rail output and 475 µA/channel quiescent current enable accurate 0.1°C resolution at <2 mA total system current. |
| Strain Gauge Amplifier | Tracking Amplifier in Power Modules |
Use Scenario: High-precision amplification of microvolt-level outputs from bonded foil strain gauges on brake calipers. IC Role / Device Role / Timing Role: All four op-amps used in cascaded gain/filter stages to achieve >120 dB dynamic range before ADC sampling. Use Value: 120 dB CMRR rejects common-mode noise from PWM-driven motor drivers sharing the same chassis ground. | Use Scenario: Real-time voltage tracking of DC-link capacitors in 48 V mild-hybrid power converters. IC Role / Device Role / Timing Role: Configured as unity-gain buffer with fast settling (6 µs to 0.1%) to feed voltage feedback loops. Use Value: 3 MHz GBW and 1.5 V/µs slew rate support accurate tracking of 100 kHz ripple components in wide-bandwidth control loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA4197QDRQ1 | Higher precision: 5 µV max offset, 0.1 µV/°C drift, 5.5 MHz GBW, but 650 µA per amp quiescent current. | Better for calibrated lab-grade instruments; less suitable for always-on low-power modules. | Select OPA4197QDRQ1 only if sub-10 µV offset and <0.2 µV/°C drift are mandatory and power budget allows +38% per channel. |
| LM2902QDRQ1 | Lower cost: 3 mV max offset, 7 MHz GBW, 1.2 mA per amp, no phase-reversal protection, wider temp range (–40°C to +150°C). | Suitable for non-critical diagnostics or HVAC actuators where offset drift is compensated digitally. | Choose LM2902QDRQ1 when cost sensitivity outweighs precision needs and phase reversal risk is mitigated by external clamping. |
Compared with OPA4171AQDRQ1, OPA4197QDRQ1 delivers superior DC accuracy at higher power cost, while LM2902QDRQ1 trades precision and protection for cost and speed - making OPA4171AQDRQ1 the balanced choice for uncalibrated automotive analog front-ends requiring reliability, low noise, and rail compatibility.
Availability
OPA4171AQDRQ1 is available at Aetrix Electronics and suitable for automotive control modules, battery management systems, and precision sensor interfaces requiring stable component supply across extended temperature and long production lifecycles.
Supply support for OPA4171AQDRQ1 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 automotive, industrial, and personal electronics markets.
The OPAx171-Q1 product line was designed specifically for high-reliability automotive signal conditioning - emphasizing low drift, rail-to-rail operation, phase-reversal immunity, and AEC-Q100 compliance from –40°C to +125°C.
FAQ
What is the maximum capacitive load the OPA4171AQDRQ1 can drive without external compensation?
The OPA4171AQDRQ1 is stable with capacitive loads up to 300 pF when configured in unity-gain or moderate closed-loop gain. This specification is verified per TI's characterization and allows direct connection to typical ADC input RC filters without adding series isolation resistors - simplifying layout and preserving signal integrity in automotive sensor interfaces.
Does the OPA4171AQDRQ1 support true single-supply operation with input signals extending below ground?
Yes. The OPA4171AQDRQ1 features a common-mode input range that extends 100 mV below the negative supply rail (V–). When V– is grounded, this enables valid operation for inputs down to –0.1 V - critical for interfacing with sensors that produce small negative transients during fault conditions or power cycling.
What is the guaranteed offset voltage drift specification for OPA4171AQDRQ1 over its full operating temperature range?
The OPA4171AQDRQ1 has a guaranteed maximum input offset voltage drift of ±2 µV/°C over the full –40°C to +125°C temperature range, with a typical value of ±0.3 µV/°C. This low drift ensures minimal calibration drift in unattended automotive systems such as tire pressure monitors or cabin air quality sensors.
How does the phase-reversal protection in OPA4171AQDRQ1 improve system reliability?
Unlike conventional op-amps, the OPA4171AQDRQ1 prevents output phase reversal when input signals exceed the specified common-mode range. Instead of inverting catastrophically, the output saturates predictably at the appropriate rail - avoiding erroneous control signals in safety-critical applications like electronic brake force distribution or active suspension control.
Is the OPA4171AQDRQ1 pin-compatible with other members of the OPAx171-Q1 family?
No. The OPA4171AQDRQ1 uses a 14-pin SOIC package with dedicated pins for four independent amplifier channels. It is not pin-compatible with the 5-pin OPA171AQDBVRQ1 (single) or 8-pin OPA2171AQDRQ1 (dual). Board layout must be designed specifically for the SOIC-14 footprint and pin assignment defined in the OPA4171AQDRQ1 datasheet.
OPA4171AQDRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- 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 (x4 Channels)
- Current - Output / Channel:
- 35 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
OPA4171AQDRQ1 FAQ
1.How can I place an order for OPA4171AQDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4171AQDRQ1 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 OPA4171AQDRQ1 reliable?
The price and inventory of OPA4171AQDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4171AQDRQ1 is usually 5 days.
3.What payment methods are accepted for OPA4171AQDRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4171AQDRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4171AQDRQ1?
OPA4171AQDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4171AQDRQ1 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 OPA4171AQDRQ1?
For technical support, including OPA4171AQDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4171AQDRQ1 requirements.
6.How does Aetrix verify that OPA4171AQDRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA4171AQDRQ1 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 OPA4171AQDRQ1 meets industry standards.
7.What is the process for return or replacement of OPA4171AQDRQ1?
All OPA4171AQDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4171AQDRQ1, 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 OPA4171AQDRQ1 part is unused and in its original packaging.
Return procedure for OPA4171AQDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4171AQDRQ1 Tags
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