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Texas Instruments OPA2991QPWRQ1
- Part No.:
- OPA2991QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
OPA2991QPWRQ1.pdf
- Description:
- AMPLIFIER
- Quantity:
- Payment:
- Shipping:
Inventory:3,672
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Product details
Overview
OPA2991QPWRQ1 from Texas Instruments is a dual-channel, AEC-Q100 Grade 1 automotive operational amplifier with rail-to-rail input and output, ±125 µV max offset voltage, 4.5 MHz gain-bandwidth, and 21 V/µs slew rate - deployed in high-side current sensing and HEV/EV motor control signal conditioning.
For engineers reviewing the OPA2991QPWRQ1 datasheet, OPA2991QPWRQ1 pinout, OPA2991QPWRQ1 application, or OPA2991QPWRQ1 equivalent, key selection criteria include its 40 V supply range (±1.35 V to ±20 V), 130 dB CMRR, low 10.8 nV/√Hz noise at 1 kHz, robust 1 nF capacitive load drive, and MUX-friendly input architecture enabling comparator-mode operation.
Technical Context
The OPA2991QPWRQ1 implements a dual-channel, 40 V rail-to-rail I/O op amp architecture with independent NMOS and PMOS input stages, enabling full differential input voltage swing up to the supply rails and eliminating need for external clamping diodes. Its shutdown functionality supports low-power system states with 30–45 µA quiescent current per amplifier when disabled.
It delivers high AC performance via slew-boost circuitry (21 V/µs), maintains DC precision across temperature (±0.3 µV/°C drift), and sustains stable operation into 1 nF loads without isolation resistors - critical for driving long traces or ADC input filters in automotive body electronics and ADAS sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 40 V (or ±1.35 V to ±20 V) - supports wide automotive battery transients and dual-supply industrial systems. |
| Gain-Bandwidth Product | 4.5 MHz - enables stable closed-loop operation up to ~450 kHz at G = 10 for precision sensor amplification. |
| Input Offset Voltage | ±125 µV (max) - ensures <1 mV error in 8-bit current-sense applications over full –40°C to +125°C range. |
| Common-Mode Rejection | 130 dB - rejects >3 mV of common-mode noise on 10 V signals, critical for high-side shunt monitoring. |
| Output Drive Capability | ±75 mA short-circuit current - drives heavy loads like relay coils or multiple downstream buffers without external gain stages. |
| Capacitive Load Drive | 1000 pF - directly interfaces with anti-aliasing filters and SAR ADC inputs without stability compensation. |
| Quiescent Current | 560 µA per amplifier - enables always-on sensing nodes in low-power vehicle modules with minimal thermal impact. |
Pinout & Package
TSSOP-8 (PW) package: 3 mm × 6.4 mm, surface-mount, thermally enhanced for automotive under-hood environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN1+ | Noninverting input, channel 1 | Accepts rail-to-rail common-mode signals; supports open-loop comparator use with no phase reversal. |
| IN1− | Inverting input, channel 1 | Differential input pair enables precision difference amplification with 130 dB CMRR. |
| OUT1 | Output, channel 1 | Rail-to-rail swing with <10 mV headroom at no load; drives 2 kΩ loads to within 250 mV of rails at 40 V supply. |
| V− | Negative (lowest) power supply | Reference node for dual-supply operation; accepts ground or negative rail down to –20 V. |
| IN2+ | Noninverting input, channel 2 | Independent second channel for dual-path signal conditioning (e.g., current + voltage sensing). |
| IN2− | Inverting input, channel 2 | Matches IN1− electrical specs; enables matched gain networks across both channels. |
| OUT2 | Output, channel 2 | Simultaneous dual-output capability eliminates need for discrete duplication in space-constrained ECUs. |
| V+ | Positive (highest) power supply | Supports up to +40 V - accommodates 24 V commercial vehicle systems and transient spikes per ISO 7637-2. |
Key Features
| Feature | Design Value |
|---|---|
| MUX-friendly inputs | Full rail-to-rail differential input range allows direct connection to multiplexed high-voltage sensor banks without level-shifting. |
| Shutdown mode | 30–45 µA per amplifier quiescent current during disable - extends battery life in always-on ADAS subsystems. |
| High EMIRR | Robust electromagnetic interference rejection (>60 dB at 1 GHz) - maintains accuracy in noisy engine bay RF environments. |
| No phase reversal | Guaranteed non-inverting behavior even when inputs exceed supply rails - prevents latch-up in fault-detection circuits. |
| AEC-Q100 Grade 1 | Qualified for –40°C to +125°C ambient operation with HBM ESD Level 2A and CDM Level C6 - meets automotive reliability standards. |
Applications
| High-Side Current Sensing | HEV/EV Motor Control |
|---|---|
Use Scenario: Monitoring battery pack discharge current in 400 V traction inverters using shunt resistors placed between high-voltage bus and IGBT gate drivers. IC Role / Device Role / Timing Role: Precision differential amplifier converting mV-level shunt voltage to isolated ADC input with <1% total error over temperature. Use Value: ±125 µV offset and 130 dB CMRR ensure sub-ampere measurement accuracy despite 400 V common-mode voltage and PWM switching noise. |
Use Scenario: Closed-loop feedback for field-oriented control (FOC) of permanent magnet synchronous motors in electric powertrains. IC Role / Device Role / Timing Role: Signal conditioner for resolver or encoder analog outputs, providing low-noise, fast-settling excitation and demodulation paths. Use Value: 4.5 MHz GBW and 21 V/µs slew rate support >200 kHz loop bandwidths; 1 nF drive capability interfaces directly with sigma-delta modulator inputs. |
| Infotainment Cluster Display Bias | On-Board Charger (OBC) Voltage Regulation |
Use Scenario: Generating stable, low-noise bias voltages for TFT-LCD column drivers and touch controller references in automotive dashboards. IC Role / Device Role / Timing Role: Low-drift, low-noise reference buffer delivering 3.3 V or 5 V from LDO outputs with high PSRR. Use Value: 10.8 nV/√Hz input noise and ±0.3 µV/°C drift prevent visible flicker or color shift in display pixels across cabin temperature extremes. |
Use Scenario: Regulating auxiliary 12 V rail from high-voltage DC link in bidirectional OBCs, requiring precise voltage feedback under dynamic load steps. IC Role / Device Role / Timing Role: Error amplifier in isolated flyback or LLC feedback loop, comparing sensed output to precision reference. Use Value: 2.5 µs settling time to 0.01% and 130 dB PSRR suppress ripple from 100 kHz switching frequencies while maintaining tight regulation tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel, high-voltage operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2904BQDRQ1 | Lower supply range (36 V max), higher offset (±3 mV), no shutdown, 1.2 MHz GBW | Suitable for cost-sensitive body electronics but lacks precision and speed for ADAS or OBC feedback loops | Select when budget constraints outweigh need for <100 µV offset or >2 MHz bandwidth |
| TSV912IQ2T | 24 V max supply, lower noise (7.5 nV/√Hz), no AEC-Q100 qualification, 8 MHz GBW | Valid for infotainment analog front-ends but not qualified for powertrain or safety-critical zones | Select only for non-safety-grade interior modules where extended temperature range is not required |
Compared with LM2904BQDRQ1 and TSV912IQ2T, the OPA2991QPWRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 40 V operation, sub-130 µV offset, and integrated shutdown - making it the only option qualified for simultaneous use in HEV/EV inverter feedback and ADAS sensor signal chains.
Availability
OPA2991QPWRQ1 is available at Aetrix Electronics and suitable for high-side current sensing, HEV/EV motor control, infotainment cluster display bias, and on-board charger voltage regulation requiring stable component supply across automotive production lifecycles.
Supply support for OPA2991QPWRQ1 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 company designing analog ICs, embedded processors, and digital signal processors for automotive, industrial, and consumer applications.
The OPAx991-Q1 family was developed specifically for high-voltage, high-precision signal conditioning in AEC-Q100-compliant automotive subsystems - emphasizing DC accuracy, noise immunity, and robustness in harsh electrical environments.
FAQ
What is the maximum supply voltage rating for OPA2991QPWRQ1?
The OPA2991QPWRQ1 supports a maximum supply voltage of 40 V across V+ and V− terminals, with absolute maximum ratings allowing up to 42 V. This enables direct integration into 24 V commercial vehicle systems and compatibility with ISO 7637-2 pulse 5a/b transients. Operation at 40 V is fully specified across –40°C to +125°C ambient temperature.
Does OPA2991QPWRQ1 include shutdown functionality?
Yes, the OPA2991QPWRQ1 includes an active-low shutdown pin (SHDN) that reduces quiescent current to 30–45 µA per amplifier when asserted. The pin accepts logic-level inputs referenced to V−, with defined thresholds: VIL ≤ (V−) + 0.2 V (enable), VIH ≥ (V−) + 0.8 V (disable). Enable/disable times are 8 µs and 3 µs respectively.
What package type is used for OPA2991QPWRQ1?
The OPA2991QPWRQ1 is packaged in an 8-pin TSSOP (PW) variant measuring 3 mm × 6.4 mm. This thermally enhanced surface-mount package provides optimized RθJA (185.1°C/W) and RθJB (115.7°C/W) for automotive under-hood applications, and is pin-compatible with industry-standard SOIC-8 and VSSOP-8 footprints.
Is OPA2991QPWRQ1 qualified for automotive safety applications?
The OPA2991QPWRQ1 is AEC-Q100 Grade 1 qualified, supporting operation from –40°C to +125°C ambient temperature, with HBM ESD classification Level 2A (±2 kV) and CDM Level C6 (±1 kV). While not ASIL-certified as a standalone safety element, it is widely deployed in ASIL-B/C subsystems including ADAS sensor interfaces and OBC feedback loops when implemented per ISO 26262 guidelines.
Can OPA2991QPWRQ1 be used as a comparator?
Yes, the OPA2991QPWRQ1 features MUX-friendly inputs with rail-to-rail common-mode and differential voltage ranges extending to the supply rails, and exhibits no phase reversal - enabling reliable open-loop comparator operation. However, it lacks built-in hysteresis or internal pull-up, so external hysteresis must be added for noise-immune threshold detection.
OPA2991QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Standard
- Number of Circuits:
- 2
- Output Type:
- Single Ended, Rail-to-Rail
- Slew Rate:
- 21V/µs
- Gain Bandwidth Product:
- 4.5 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 10 pA
- Voltage - Input Offset:
- 125 µV
- Current - Supply:
- 560µA (x2 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:
- 8-TSSOP
OPA2991QPWRQ1 FAQ
1.How can I place an order for OPA2991QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2991QPWRQ1 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 OPA2991QPWRQ1 reliable?
The price and inventory of OPA2991QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2991QPWRQ1 is usually 5 days.
3.What payment methods are accepted for OPA2991QPWRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2991QPWRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2991QPWRQ1?
OPA2991QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2991QPWRQ1 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 OPA2991QPWRQ1?
For technical support, including OPA2991QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2991QPWRQ1 requirements.
6.How does Aetrix verify that OPA2991QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA2991QPWRQ1 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 OPA2991QPWRQ1 meets industry standards.
7.What is the process for return or replacement of OPA2991QPWRQ1?
All OPA2991QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2991QPWRQ1, 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 OPA2991QPWRQ1 part is unused and in its original packaging.
Return procedure for OPA2991QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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