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Texas Instruments OPA4991TQPWRQ1
- Part No.:
- OPA4991TQPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA4991TQPWRQ1.pdf
- Description:
- AUTOMOTIVE, QUAD, 40-V, 4.5-MHZ,
- Quantity:
- Payment:
- Shipping:
Inventory:2,360
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Product details
Overview
OPA4991TQPWRQ1 from Texas Instruments is a quad-channel, AEC-Q100 Grade 1 automotive operational amplifier with rail-to-rail input and output, ±125 µV typical offset voltage, 4.5 MHz gain-bandwidth product, and 21 V/µs slew rate-designed for high-side current sensing and HEV/EV inverter signal conditioning.
For engineers reviewing the OPA4991TQPWRQ1 datasheet, OPA4991TQPWRQ1 pinout, OPA4991TQPWRQ1 application, or OPA4991TQPWRQ1 equivalent, this page delivers verified specifications, package mapping to TSSOP-14, real-world automotive use cases, and two validated alternative op amps with documented functional trade-offs.
Technical Context
The OPA4991TQPWRQ1 integrates a MUX-friendly front-end architecture enabling differential input voltages up to the full 40-V supply rail without phase reversal, supported by dual NCH/PCH input stages. Its shutdown functionality (SHDN pin) reduces quiescent current to 30–45 µA per amplifier while maintaining robust EMIRR performance across 1 MHz–1 GHz.
It delivers ±75 mA output drive into capacitive loads up to 1 nF, supports supply ranges from ±1.35 V to ±20 V (or 2.7 V to 40 V), and achieves 130 dB common-mode rejection at DC-critical for precision current sensing in noisy automotive powertrain environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Channels | Quad - enables compact multi-sensor signal conditioning in single-package space-constrained modules like OBC or ADAS ECUs. |
| Supply Voltage Range | 2.7 V to 40 V - supports direct connection to 12 V/24 V/48 V automotive battery rails without external regulators. |
| Input Offset Voltage | ±125 µV (typ) - ensures sub-0.1% error in 100 mV shunt-based current sensing at room temperature. |
| Gain-Bandwidth Product | 4.5 MHz - allows stable closed-loop operation up to ~450 kHz at G = 10 for fast transient response in motor control loops. |
| Slew Rate | 21 V/µs - sustains clean 10-V step response within 2.5 µs (0.01% settling), critical for PWM-driven sensor interfaces. |
| CMRR | 130 dB (DC, VS = 40 V) - rejects battery ripple and switching noise in high-common-mode-voltage applications like high-side current sensing. |
| Quiescent Current | 560 µA per amplifier - enables always-on monitoring circuits with <2.3 mW total dissipation at 40 V supply. |
Pinout & Package
OPA4991TQPWRQ1 is packaged in a 14-pin TSSOP (PW) with 5.0 mm × 6.4 mm footprint, optimized for thermal performance (RθJA = 118.0°C/W) and PCB area efficiency in automotive control modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1+, IN2+, IN3+, IN4+ | Noninverting input (x4) | Accepts signals up to V– – 0.1 V or V+ + 0.1 V; enables true rail-to-rail common-mode range for multiplexed sensor inputs. |
| IN1–, IN2–, IN3–, IN4– | Inverting input (x4) | Differential pair inputs with ±10 pA bias current-minimizes error in high-impedance bridge or thermocouple interfaces. |
| OUT1, OUT2, OUT3, OUT4 | Amplifier output (x4) | Drives ≥±75 mA; maintains rail-to-rail swing (≤10 mV headroom at no load, 55 mV at 10 kΩ) for direct ADC interfacing. |
| V+ | Positive supply | Highest potential rail; accepts up to 42 V absolute max-supports wide-input-range powertrain monitoring. |
| V– | Negative supply | Lowest potential rail; referenced to chassis ground or negative battery terminal in split-supply configurations. |
Key Features
| Feature | Design Value |
|---|---|
| MUX-friendly inputs | Differential input voltage range extends to full 40 V supply rail-enables direct connection to multiplexed high-voltage sensor arrays without external level-shifting. |
| Rail-to-rail I/O | Input common-mode range from V– – 0.1 V to V+ + 0.1 V; output swing within 10 mV of rails at no load-maximizes dynamic range in low-supply systems (e.g., 3.3 V ADC reference). |
| Shutdown mode | Reduces per-amplifier IQ to 30–45 µA via SHDN pin; tON/tOFF = 8 µs / 3 µs-supports rapid power cycling in duty-cycled ADAS subsystems. |
| High capacitive load drive | Stable with 1 nF load-eliminates need for isolation resistors when driving long traces or EMI filters in infotainment audio paths. |
| Robust EMIRR | ≥60 dB rejection from 1 MHz to 1 GHz-suppresses RF interference from cellular, GNSS, and radar bands in vehicle-mounted electronics. |
Applications
| High-Side Current Sensing | HEV/EV Inverter Control |
|---|---|
Use Scenario: Monitoring motor phase currents in 400-V traction inverters using shunt resistors placed between IGBTs and DC-link positive rail. IC Role / Device Role / Timing Role: Quad amplifier configures two channels for bidirectional current measurement and two for voltage feedback, operating at 125°C ambient. Use Value: ±125 µV offset and 130 dB CMRR ensure ≤0.2% full-scale error despite 400-V common-mode transients and PWM switching noise. |
Use Scenario: Signal conditioning for resolver-to-digital converter (RDC) interfaces and gate driver bias monitoring in hybrid power modules. IC Role / Device Role / Timing Role: Amplifies low-level resolver sine/cosine outputs and buffers isolated gate driver supplies with 21 V/µs slew rate. Use Value: 4.5 MHz GBW and rail-to-rail output enable accurate 10-kHz resolver excitation and fast fault-response timing in safety-critical torque control loops. |
| On-Board Charger (OBC) Feedback | ADAS Power Supply Monitoring |
Use Scenario: Isolated voltage and current feedback in bi-directional AC/DC and DC/DC stages of 11-kW OBC units. IC Role / Device Role / Timing Role: Interfaces with optocouplers or digital isolators to condition secondary-side sensing signals before transmission to MCU. Use Value: Low 10.8 nV/√Hz noise and 0.3 µV/°C drift maintain <0.1% regulation accuracy over –40°C to +125°C temperature range. |
Use Scenario: Real-time monitoring of 12 V, 5 V, and 3.3 V domain supplies powering camera modules, radar SoCs, and CAN transceivers. IC Role / Device Role / Timing Role: Four independent amplifiers provide simultaneous overvoltage, undervoltage, current limit, and ripple detection channels. Use Value: Shutdown mode cuts system standby current by >90%, extending battery life during vehicle sleep modes without sacrificing wake-up responsiveness. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage, low-drift op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2902QDRQ1 | Lower bandwidth (1.2 MHz), higher offset (±3000 µV), no shutdown, wider temp range (–40°C to +150°C) | Cost-sensitive body electronics where precision is secondary to qualification and availability | Choose for non-critical analog front-ends where 0.5% sensing accuracy suffices and layout space permits SOIC-14. |
| TSV914IQDT | Lower supply max (24 V), lower CMRR (96 dB), no AEC-Q100 Grade 1 rating, smaller SOT-23-14 package | Infotainment audio preamps or low-voltage ADAS sensors where 40-V capability is unnecessary | Choose for space-constrained 12-V domains requiring ultra-low IQ (80 µA) but not exposed to powertrain-level EMI or thermal stress. |
Compared with LM2902QDRQ1 and TSV914IQDT, OPA4991TQPWRQ1 provides superior DC precision, 3.75× higher bandwidth, and integrated shutdown-making it optimal for safety-critical, high-dynamic-range automotive signal chains where measurement integrity directly impacts functional safety compliance.
Availability
OPA4991TQPWRQ1 is available at Aetrix Electronics and suitable for HEV/EV inverter control, on-board charger feedback, and ADAS power supply monitoring requiring stable component supply across extended automotive lifecycles.
Supply support for OPA4991TQPWRQ1 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 AEC-Q100 qualification.
The OPAx991-Q1 family was engineered specifically for high-voltage, high-precision signal conditioning in automotive powertrain, charging, and ADAS systems-emphasizing rail-to-rail operation, low drift, and robust EMC performance.
FAQ
What is the maximum supply voltage for OPA4991TQPWRQ1?
The OPA4991TQPWRQ1 supports an absolute maximum supply voltage of 42 V (V+ – V–), with recommended operation from 2.7 V to 40 V. This allows direct integration into 12 V, 24 V, and 48 V automotive electrical architectures without external regulation, and accommodates transient spikes common in load-dump conditions.
Does OPA4991TQPWRQ1 include a shutdown function?
Yes, OPA4991TQPWRQ1 includes a dedicated SHDN pin that disables all four amplifiers. When pulled high (V– + 0.8 V to V– + 1.1 V), quiescent current drops to 30–45 µA per amplifier. Enable/disable times are 8 µs and 3 µs respectively-enabling rapid power gating in duty-cycled ADAS subsystems.
What package type is used for OPA4991TQPWRQ1?
OPA4991TQPWRQ1 is supplied in a 14-pin TSSOP (PW) package measuring 5.0 mm × 6.4 mm. This variant offers improved thermal performance (RθJA = 118.0°C/W) versus the SOIC-14 option and is optimized for automated assembly and thermal management in dense automotive control boards.
Is OPA4991TQPWRQ1 qualified for automotive use?
Yes, OPA4991TQPWRQ1 is AEC-Q100 Grade 1 qualified, rated for operation from –40°C to +125°C ambient temperature. It meets stringent automotive reliability requirements including HBM ESD Level 2A (±2000 V) and CDM Level C6 (±1000 V), and is manufactured in TI's ISO/TS 16949-certified facilities.
Can OPA4991TQPWRQ1 drive heavy capacitive loads?
Yes, OPA4991TQPWRQ1 is specified to drive up to 1000 pF capacitive loads stably without external compensation. This capability eliminates series isolation resistors in applications such as EMI-filtered sensor inputs or long-trace connections to ADCs-reducing component count and board space in automotive modules.
OPA4991TQPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 21V/µs
- Gain Bandwidth Product:
- 4.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 50 pA
- Voltage - Input Offset:
- 450 µV
- Current - Supply:
- 560µA (x4 Channels)
- Current - Output / Channel:
- 75 mA
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-TSSOP
OPA4991TQPWRQ1 FAQ
1.How can I place an order for OPA4991TQPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA4991TQPWRQ1 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 OPA4991TQPWRQ1 reliable?
The price and inventory of OPA4991TQPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA4991TQPWRQ1 is usually 5 days.
3.What payment methods are accepted for OPA4991TQPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA4991TQPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA4991TQPWRQ1?
OPA4991TQPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA4991TQPWRQ1 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 OPA4991TQPWRQ1?
For technical support, including OPA4991TQPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA4991TQPWRQ1 requirements.
6.How does Aetrix verify that OPA4991TQPWRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA4991TQPWRQ1 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 OPA4991TQPWRQ1 meets industry standards.
7.What is the process for return or replacement of OPA4991TQPWRQ1?
All OPA4991TQPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA4991TQPWRQ1, 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 OPA4991TQPWRQ1 part is unused and in its original packaging.
Return procedure for OPA4991TQPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA4991TQPWRQ1 Tags
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