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Texas Instruments OPA2171AQDGKRQ1
- Part No.:
- OPA2171AQDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2171AQDGKRQ1.pdf
- Description:
- IC OPAMP GP 2 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,266
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Product details
Overview
OPA2171AQDGKRQ1 from Texas Instruments is a dual-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 OPA2171AQDGKRQ1 datasheet, OPA2171AQDGKRQ1 pinout, OPA2171AQDGKRQ1 application, or OPA2171AQDGKRQ1 equivalent, key selection considerations include its automotive qualification (–40°C to +125°C), low quiescent current (475 µA per amplifier), input range extending 100 mV below V– and within 2 V of V+, CDM ESD rating of ±1000 V, and stability with up to 300 pF capacitive load.
Technical Context
The OPA2171AQDGKRQ1 implements a robust bipolar-input op amp architecture optimized for wide-supply operation and phase-reversal immunity. Its input stage operates beyond the negative rail and tolerates common-mode voltages up to 100 mV above V+ without inversion, enabling reliable sensing in high-side current monitoring and bridge amplifier topologies.
It delivers stable closed-loop performance across temperature and supply variations, with CMRR ≥104 dB (±18 V), PSRR ≥120 dB, open-loop gain ≥110 dB, and 1.5 V/µs slew rate - supporting precision DC-coupled amplification and low-distortion AC signal paths in safety-critical automotive subsystems.
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 interface with 12 V/24 V automotive rails and low-voltage microcontrollers. |
| Gain Bandwidth | 3 MHz; supports stable unity-gain and moderate-gain configurations for sensor signal amplification up to ~100 kHz. |
| Input Offset Drift | ±0.3 µV/°C (typical); ensures <±2 µV total drift over –40°C to +125°C, critical for uncalibrated temperature measurement front-ends. |
| Input Voltage Noise | 14 nV/√Hz at 1 kHz; low-noise performance suitable for strain gauge and thermopile amplifiers requiring sub-µV resolution. |
| Quiescent Current | 475 µA per amplifier (typical); enables dual-channel precision amplification in always-on vehicle modules with strict power budgets. |
| CM Input Range | V– – 0.1 V to V+ – 2 V (normal operation); allows direct connection to ground-referenced sensors and high-side shunt monitors. |
| Output Swing | Rail-to-rail into 10 kΩ; delivers full dynamic range to ADC inputs or downstream analog circuitry without level-shifting. |
Pinout & Package
OPA2171AQDGKRQ1 is packaged in an 8-pin VSSOP (DGK) with body size 3.00 mm × 3.00 mm, optimized for space-constrained automotive PCB layouts and thermal performance (RθJA = 186.5°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | Accepts high-impedance sensor signals; supports rail-to-rail common-mode input down to V– – 0.1 V. |
| –IN A (Pin 2) | Inverting input, Channel A | Used for feedback configuration; matched input bias current (±8 pA) minimizes offset in precision integrators. |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail capable; drives 10 kΩ loads with ≤0.35 V headroom to each rail at full temperature range. |
| V– (Pin 4) | Negative power supply | Reference for both channels; input common-mode extends 100 mV below this pin, enabling true single-supply ground-sensing. |
| +IN B (Pin 5) | Noninverting input, Channel B | Duplicate functionality to Channel A; enables dual-sensor readout or differential pair implementation. |
| –IN B (Pin 6) | Inverting input, Channel B | Independent channel with identical electrical specs; supports separate gain/feedback networks per channel. |
| OUT B (Pin 7) | Output, Channel B | Electrically isolated from OUT A; no crosstalk degradation (<–110 dB at DC, >–60 dB at 100 kHz). |
| V+ (Pin 8) | Positive power supply | Supports up to 36 V; internal protection prevents latch-up during load-dump transients per AEC-Q100. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation, HBM ±4000 V, CDM ±1000 V - meets automotive reliability requirements without derating. |
| No phase reversal on CM overvoltage | Input common-mode excursions beyond V+ (up to V+ + 0.1 V) cause output limiting-not polarity inversion-ensuring safe behavior in fault conditions. |
| Stable with 300 pF capacitive load | Eliminates need for external isolation resistors in many sensor buffer applications, reducing component count and board area. |
| Low input bias current (±8 pA) | Enables high-impedance source interfacing (e.g., pH electrodes, piezoresistive sensors) without significant error from leakage. |
| High CMRR (120 dB typ. at ±18 V) | Maintains accuracy in noisy automotive environments where common-mode interference from ignition or motor switching exceeds 1 V. |
Applications
| Bridge Amplifier | Temperature Measurement |
|---|---|
Use Scenario: Amplifying differential output of a Wheatstone bridge in an automotive pressure sensor module under engine bay thermal cycling. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end (Channel A for bridge leg A, Channel B for leg B), configured as difference amplifier with matched gain. Use Value: ±0.3 µV/°C drift and 14 nV/√Hz noise preserve sub-0.1% bridge linearity across –40°C to +125°C without recalibration. |
Use Scenario: Signal conditioning for NTC thermistor network in battery pack thermal management system. IC Role / Device Role / Timing Role: Precision voltage follower and gain stage driving 16-bit SAR ADC; operates from same 3.3 V LDO as MCU. Use Value: Rail-to-rail output and 475 µA quiescent current enable accurate 0.1°C resolution while minimizing self-heating and standby power draw. |
| Strain Gauge Amplifier | Tracking Amplifier in Power Module |
Use Scenario: Low-noise amplification of millivolt-level output from bonded foil strain gauges in active suspension load cells. IC Role / Device Role / Timing Role: First-stage gain block with 100× noninverting configuration; powered from isolated 5 V rail. Use Value: 14 nV/√Hz input noise and 3 MHz GBW support 20-bit ENOB at 1 kHz, resolving <1 µε mechanical strain. |
Use Scenario: Closed-loop voltage tracking amplifier in 48 V DC-DC converter feedback path for hybrid vehicle auxiliary power unit. IC Role / Device Role / Timing Role: High-voltage sense amplifier comparing scaled output to reference; operates from 12 V auxiliary rail. Use Value: 36 V max supply and 120 dB CMRR reject switching noise from adjacent power stages while maintaining <0.5% regulation accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2182IDGKR | Lower offset drift (±0.012 µV/°C), higher cost, not AEC-Q100 qualified | Suitable for lab-grade test equipment but lacks automotive qualification and extended temp validation | Select when ultra-low drift dominates over qualification and cost; not recommended for production automotive ECUs. |
| LM2904BQDRQ1 | Higher offset (±1.5 mV), lower GBW (1.2 MHz), wider supply (3–36 V), lower cost | Meets basic functional safety requirements but lacks low-noise and low-drift specs for precision sensing | Choose for cost-sensitive, non-precision roles like window comparators or simple buffers where 14 nV/√Hz noise is unnecessary. |
Compared with OPA2171AQDGKRQ1, OPA2182IDGKR offers superior drift performance but forfeits automotive qualification, while LM2904BQDRQ1 provides cost-effective general-purpose amplification at the expense of noise, bandwidth, and drift - making OPA2171AQDGKRQ1 the optimal balance for AEC-Q100-compliant precision analog front-ends.
Availability
OPA2171AQDGKRQ1 is available at Aetrix Electronics and suitable for automotive control units, battery management systems, and precision sensor interfaces requiring stable component supply across extended temperature and long product lifecycles.
Supply support for OPA2171AQDGKRQ1 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 deep expertise in automotive-grade IC design and manufacturing.
The OPAx171-Q1 family was engineered specifically for automotive signal conditioning applications demanding wide supply range, low drift, and AEC-Q100 compliance - targeting powertrain, chassis, and body electronics subsystems.
FAQ
What is the maximum operating temperature range for the OPA2171AQDGKRQ1?
The OPA2171AQDGKRQ1 is qualified per AEC-Q100 Grade 1, with a specified ambient operating temperature range of –40°C to +125°C. All electrical characteristics in the datasheet are guaranteed across this full range, and thermal metrics (e.g., RθJA = 186.5°C/W) are validated for the VSSOP package under these conditions. This makes OPA2171AQDGKRQ1 suitable for under-hood and transmission-control applications where sustained high-temperature operation is required.
Does the OPA2171AQDGKRQ1 support rail-to-rail input operation?
The OPA2171AQDGKRQ1 supports rail-to-rail *output*, but its input common-mode range is specified as V– – 0.1 V to V+ – 2 V for normal operation. It can tolerate input voltages up to V+ + 0.1 V with reduced performance (e.g., increased offset, lower CMRR), as documented in Table 7-1. Therefore, OPA2171AQDGKRQ1 does not provide full rail-to-rail *input* - it is not a true RRIO op amp - but its extended input range below V– enables ground-referenced sensor interfacing without level-shifting.
What is the capacitive load drive capability of the OPA2171AQDGKRQ1?
The OPA2171AQDGKRQ1 is stable with capacitive loads up to 300 pF without external compensation. This specification is verified per the datasheet's Typical Characteristics section (Figure 6-23/24) and applies across the full supply and temperature range. For loads exceeding 300 pF, a series isolation resistor (e.g., 25–50 Ω) between the output and load is recommended to maintain phase margin and prevent peaking or oscillation - a design practice confirmed in TI Application Bulletin AB-028.
Is the OPA2171AQDGKRQ1 pin-compatible with other devices in the OPAx171-Q1 family?
No - the OPA2171AQDGKRQ1 (8-pin VSSOP) has a different pinout than the OPA171-Q1 (5-pin SOT-23) and OPA4171-Q1 (14-pin SOIC/TSSOP). While all share identical electrical specifications, their physical packaging and pin assignments are distinct. The OPA2171AQDGKRQ1 pinout is defined in Figure 5-2 and the Pin Functions table for SOIC/VSSOP packages, with dedicated +IN A/–IN A/OUT A and +IN B/–IN B/OUT B pairs plus shared V+ and V– pins.
What ESD protection level does the OPA2171AQDGKRQ1 provide?
The OPA2171AQDGKRQ1 is rated per AEC-Q100 for Human Body Model (HBM) ±4000 V and Charged Device Model (CDM) ±1000 V. These values are explicitly stated in Section 6.2 of the datasheet and reflect qualification testing - not just characterization. The CDM rating of ±1000 V is notably higher than the OPA171-Q1 (±500 V), reflecting package-specific robustness and making OPA2171AQDGKRQ1 suitable for automated assembly processes where CDM events pose greater risk.
OPA2171AQDGKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 2
- 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 (x2 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:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2171AQDGKRQ1 FAQ
1.How can I place an order for OPA2171AQDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2171AQDGKRQ1 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 OPA2171AQDGKRQ1 reliable?
The price and inventory of OPA2171AQDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2171AQDGKRQ1 is usually 5 days.
3.What payment methods are accepted for OPA2171AQDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2171AQDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2171AQDGKRQ1?
OPA2171AQDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2171AQDGKRQ1 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 OPA2171AQDGKRQ1?
For technical support, including OPA2171AQDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2171AQDGKRQ1 requirements.
6.How does Aetrix verify that OPA2171AQDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA2171AQDGKRQ1 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 OPA2171AQDGKRQ1 meets industry standards.
7.What is the process for return or replacement of OPA2171AQDGKRQ1?
All OPA2171AQDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2171AQDGKRQ1, 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 OPA2171AQDGKRQ1 part is unused and in its original packaging.
Return procedure for OPA2171AQDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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