My Inquiry
My Account
Texas Instruments OPA4171AIDR
- Part No.:
- OPA4171AIDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA4171AIDR.pdf
- Description:
- IC OPAMP GP 4 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,837
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA4171AIDR from Texas Instruments is a quad-channel, rail-to-rail output, general-purpose operational amplifier optimized for single-supply operation from 2.7V to 36V (±1.35V to ±18V), featuring 3MHz gain bandwidth, 14nV/√Hz input voltage noise at 1kHz, ±0.3µV/°C typical offset drift, and 120dB typical common-mode rejection. It serves precision signal conditioning in industrial sensor interfaces and battery-powered instrumentation.
For engineers reviewing the OPA4171AIDR datasheet, OPA4171AIDR pinout, OPA4171AIDR application, or OPA4171AIDR equivalent, this page delivers verified electrical specifications, TSSOP-14 package layout, real-world use cases in transducer amplification and temperature measurement, and validated alternative parts with documented functional trade-offs.
Technical Context
The OPA4171AIDR implements a high-voltage CMOS input stage enabling rail-to-rail output swing and full input operation 100mV beyond the negative rail and within 2V of the positive rail. Its internal phase-reversal protection prevents output inversion when inputs exceed the linear common-mode range - a critical feature in noninverting configurations with wide-swing sensors.
Specified across –40°C to +125°C and stable with up to 300pF capacitive loads, the device uses a low-quiescent-current architecture (475µA per amplifier) without sacrificing DC precision: input bias current is only ±8pA, offset voltage is ±1.8mV max, and open-loop gain exceeds 110dB - enabling high-accuracy closed-loop designs in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7V to 36V (±1.35V to ±18V): supports wide-input industrial power rails and battery-backed systems without level-shifting. |
| Gain Bandwidth Product | 3MHz: enables stable unity-gain buffers and 10x gain amplifiers up to 300kHz for sensor signal conditioning. |
| Input Voltage Noise | 14nV/√Hz at 1kHz: ensures minimal added noise in low-level transducer and strain gauge amplification. |
| Offset Drift | ±0.3µV/°C typical: maintains <±2µV total drift over –40°C to +125°C, critical for uncalibrated temperature measurement front-ends. |
| Common-Mode Rejection | 120dB typical at ±18V: rejects supply ripple and ground noise in single-supply systems with shared return paths. |
| Rail-to-Rail Output | Swings within 30mV of rails at 5V supply: maximizes dynamic range in low-voltage data acquisition systems. |
| Quiescent Current | 475µA per amplifier: allows four independent channels in space-constrained, low-power applications like portable test equipment. |
Pinout & Package
OPA4171AIDR is housed in a 14-pin TSSOP (PW) package measuring 5mm × 6.4mm, with exposed pad for thermal enhancement and surface-mount compatibility. Pin numbering follows standard TI TSSOP orientation (pin 1 marked by dot or bevel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | Accepts high-impedance sensor signals; operates 100mV below V– and within 2V of V+. |
| –IN A (Pin 2) | Inverting input, Channel A | Configures precision inverting gain stages; matched with +IN A for common-mode rejection. |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail capable; drives 10kΩ load with <30mV headroom at 5V supply. |
| V+ (Pin 4) | Positive supply | Highest potential rail; decoupling capacitor required within 5mm for stability. |
| V– (Pin 11) | Negative supply | Lowest potential rail; reference for all inputs and outputs; accepts ground or negative voltage. |
| +IN B (Pin 5), –IN B (Pin 6), OUT B (Pin 7) | Channel B inputs/outputs | Electrically identical to Channel A; enables dual differential amplifiers on one IC. |
| +IN C (Pin 10), –IN C (Pin 9), OUT C (Pin 8) | Channel C inputs/outputs | Independent channel with same specs; supports three-sensor monitoring or multi-stage filtering. |
| +IN D (Pin 12), –IN D (Pin 13), OUT D (Pin 14) | Channel D inputs/outputs | Fourth channel for redundancy, calibration reference, or auxiliary signal path. |
Key Features
| Feature | Design Value |
|---|---|
| RFI-filtered inputs | Integrated input filtering suppresses high-frequency interference from switching power supplies and RF sources without external RC networks. |
| No phase reversal | Internal protection prevents output inversion when inputs exceed common-mode range - eliminates latch-up risk in sensor overvoltage events. |
| Capacitive load drive | Stable with up to 300pF directly at output; avoids oscillation in long-trace or cable-driven applications without series isolation resistors. |
| Wide temperature specification | Full performance guaranteed from –40°C to +125°C - suitable for under-hood automotive modules and industrial motor control enclosures. |
| Low input bias current | ±8pA typical enables high-impedance source interfacing (e.g., pH electrodes, piezoelectric sensors) without significant DC error. |
Applications
| Transducer Amplifier | Temperature Measurement |
|---|---|
Use Scenario: Amplifying low-level mV outputs from pressure, load cell, or flow transducers in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Precision DC-coupled gain stage with 120dB CMRR rejecting common-mode noise from shared 24V DC bus. Use Value: ±1.8mV max offset and ±0.3µV/°C drift ensure <0.1% full-scale error across ambient temperature swings without recalibration. |
Use Scenario: Conditioning signals from RTDs or thermistors in HVAC controllers and industrial oven temperature feedback loops. IC Role / Device Role / Timing Role: Low-noise, low-drift instrumentation amplifier front-end with rail-to-rail output driving 12-bit ADC references. Use Value: 14nV/√Hz noise floor preserves resolution for sub-0.1°C measurements; 475µA per channel enables 4-sensor monitoring on 3.3V battery power. |
| Bridge Amplifier | Battery-Powered Instrument |
Use Scenario: Reading Wheatstone bridge outputs in strain gauge-based structural health monitoring systems deployed in remote infrastructure. IC Role / Device Role / Timing Role: Quad-channel differential amplifier providing simultaneous excitation and sensing for quarter/half/full bridges. Use Value: Four matched channels on one TSSOP-14 reduce PCB area by 75% vs discrete op-amps; 36V supply tolerance accommodates 24V bridge excitation. |
Use Scenario: Signal conditioning in handheld multimeters, portable environmental sensors, and field service test tools. IC Role / Device Role / Timing Role: Low-quiescent-current analog front-end supporting >100-hour battery life while maintaining µV-level DC accuracy. Use Value: 475µA per amplifier enables four independent measurement channels on coin-cell or Li-ion power; RFI filtering suppresses EMI from display drivers. |
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 |
|---|---|---|---|
| OPA4197IPW | Higher precision: ±25µV max offset, ±0.1µV/°C drift, 10MHz GBW, but 650µA IQ per channel. | Better for closed-loop servo control requiring <0.01% linearity; less suitable for ultra-low-power battery use. | Select OPA4197IPW when offset and drift dominate system error budget over quiescent power. |
| LM324DR | Lower cost, wider temp range (–40°C to +125°C), but higher 3mV offset, 20nV/√Hz noise, and 1.2MHz GBW. | Suitable for non-critical industrial controls where 1% accuracy suffices and BOM cost is primary constraint. | Select LM324DR only when absolute DC precision and noise performance are secondary to unit cost and legacy design continuity. |
Compared with OPA4171AIDR, OPA4197IPW trades 38% higher quiescent current for 72× lower offset voltage and 2.5× higher bandwidth, while LM324DR reduces cost by ~40% at the expense of 16× higher input noise and 2.5× lower CMRR - making OPA4171AIDR the optimal balance for mid-tier precision industrial analog front-ends.
Availability
OPA4171AIDR is available at Aetrix Electronics and suitable for transducer amplification, temperature measurement, bridge sensing, and battery-powered instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA4171AIDR 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 over 90 years of innovation in precision analog ICs and industrial-grade reliability.
The OPAx171 family was designed specifically for general-purpose industrial signal conditioning - emphasizing wide supply range, rail-to-rail output, low drift, and robust ESD/overstress tolerance in harsh operating environments.
FAQ
What is the maximum capacitive load the OPA4171AIDR can drive without instability?
The OPA4171AIDR is specified stable with capacitive loads up to 300pF when configured in unity-gain or moderate-gain configurations. This capability eliminates the need for output isolation resistors in many PCB layouts, simplifying design for sensor interfaces and data acquisition systems. For loads exceeding 300pF, a series resistor (e.g., 50Ω) between the OPA4171AIDR output and the load restores phase margin. The device's internal compensation ensures consistent behavior across its full –40°C to +125°C operating range.
Does the OPA4171AIDR support true rail-to-rail input operation?
The OPA4171AIDR supports rail-to-rail input operation with a common-mode voltage range extending 100mV below the negative supply (V–) and within 2V of the positive supply (V+). It can accept inputs up to 100mV beyond V+, but with reduced performance (e.g., increased offset, lower CMRR) in that extended region. For full-spec operation, keep inputs between (V–) – 0.1V and (V+) – 2V. This behavior is explicitly characterized in the datasheet's Figure 5-4 and Table 6-1.
What is the typical quiescent current per channel of the OPA4171AIDR at room temperature?
The typical quiescent current per channel of the OPA4171AIDR is 475µA at TA = 25°C and VS = ±18V. Over temperature (–40°C to +125°C), it rises to a maximum of 650µA per amplifier. This low power consumption enables four independent precision amplifiers in space- and energy-constrained applications such as portable test equipment and multi-sensor IoT edge nodes - without requiring active power gating or duty cycling.
How does the OPA4171AIDR prevent phase reversal during input overvoltage conditions?
The OPA4171AIDR incorporates internal phase-reversal protection circuitry that clamps the output to the appropriate supply rail instead of inverting it when inputs exceed the linear common-mode range. This behavior is confirmed in Figure 5-25 ("No Phase Reversal") of the datasheet, where the output remains stable even with ±18.5V sine-wave inputs applied. Unlike conventional op-amps, this feature eliminates risk of latch-up or erroneous control signals in sensor front-ends exposed to transient overvoltages.
Is the OPA4171AIDR pin-compatible with other members of the OPAx171 family?
No - the OPA4171AIDR (quad, TSSOP-14) is not pin-compatible with the OPA171 (single, SOT-553/SOIC-8) or OPA2171 (dual, VSSOP-8/SOIC-8). Each variant has distinct pin counts, layouts, and terminal assignments. For example, OPA4171AIDR dedicates pins 1–14 to four complete amplifier channels plus dual supplies, whereas OPA171 uses only five pins for one channel. Migration requires PCB redesign; however, electrical specifications (gain bandwidth, noise, drift) are identical across the family for direct functional replacement.
OPA4171AIDR 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):
- 2.7 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
OPA4171AIDR FAQ
1.How can I place an order for OPA4171AIDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4171AIDR 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 OPA4171AIDR reliable?
The price and inventory of OPA4171AIDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4171AIDR is usually 5 days.
3.What payment methods are accepted for OPA4171AIDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4171AIDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4171AIDR?
OPA4171AIDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4171AIDR 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 OPA4171AIDR?
For technical support, including OPA4171AIDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4171AIDR requirements.
6.How does Aetrix verify that OPA4171AIDR is sourced from the original manufacturer or authorized distributors?
All OPA4171AIDR 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 OPA4171AIDR meets industry standards.
7.What is the process for return or replacement of OPA4171AIDR?
All OPA4171AIDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA4171AIDR, 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 OPA4171AIDR part is unused and in its original packaging.
Return procedure for OPA4171AIDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4171AIDR Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
