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Texas Instruments OPA991SQDBVRQ1
- Part No.:
- OPA991SQDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
OPA991SQDBVRQ1.pdf
- Description:
- AUTOMOTIVE, SINGLE, 40-V 4.5-MHZ
- Quantity:
- Payment:
- Shipping:
Inventory:2,966
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Product details
Overview
OPA991SQDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified single-channel automotive operational amplifier with rail-to-rail input and output, ±125 µV offset voltage, 4.5 MHz gain-bandwidth, and 21 V/µs slew rate - deployed in high-side current sensing and HEV/EV inverter signal conditioning.
For engineers reviewing the OPA991SQDBVRQ1 datasheet, OPA991SQDBVRQ1 pinout, OPA991SQDBVRQ1 application, or OPA991SQDBVRQ1 equivalent, key selection criteria include its 40 V supply range (±1.35 V to ±20 V), 130 dB CMRR, MUX-friendly inputs enabling comparator-mode operation, and robust 1 nF capacitive load drive capability.
Technical Context
The OPA991SQDBVRQ1 employs a dual-input-stage architecture (NCH and PCH front end) enabling full rail-to-rail common-mode input range up to the supply rails, eliminating need for external clamping diodes while maintaining low distortion during fast transients. Its shutdown circuitry supports low-power sleep mode with 30–45 µA quiescent current per amplifier.
It delivers ±75 mA output current and operates stably with 1 nF capacitive loads without isolation resistors, enabled by internal slew-boost and phase-margin optimization. The device features two distinct input pairs - main and auxiliary - supporting wide common-mode operation across 40 V supply, with CMRR maintained above 107 dB over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Range | 2.7 V to 40 V (or ±1.35 V to ±20 V): supports direct integration into 12 V, 24 V, and 48 V automotive power domains without level-shifting. |
| Offset Voltage | ±125 µV typical: enables accurate DC-coupled amplification in precision current sensing with sub-0.1% error at 100 mV sense voltage. |
| Gain-Bandwidth | 4.5 MHz: allows stable unity-gain operation up to ~4.5 MHz or closed-loop gain of 100 at ~45 kHz for sensor signal conditioning. |
| Slew Rate | 21 V/µs: ensures <2.5 µs settling to 0.01% for 10 V step, critical for fast transient response in motor control feedback loops. |
| CMRR | 130 dB at 40 V supply: rejects supply noise and common-mode interference in high-noise automotive environments like inverters. |
| Capacitive Load Drive | 1 nF: eliminates need for series isolation resistor when driving long traces or ADC input filters, simplifying layout. |
| Quiescent Current | 560 µA per amplifier: enables always-on monitoring circuits in body electronics with minimal battery drain. |
Pinout & Package
OPA991SQDBVRQ1 is packaged in a 5-pin SOT-23 (DBV) with 2.9 mm × 2.8 mm footprint, optimized for space-constrained automotive PCBs and compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Noninverting input | Accepts signals from V– – 0.1 V to V+ + 0.1 V; supports MUX-friendly differential input up to full supply rail. |
| IN− | Inverting input | Same rail-to-rail common-mode range as IN+; enables true comparator operation in open-loop configurations. |
| OUT | Amplifier output | Delivers ±75 mA, swings within 5 mV of rails under no load, and drives 1 nF directly without instability. |
| V− | Negative supply | Lowest potential rail; referenced for all biasing and shutdown logic thresholds. |
| V+ | Positive supply | Highest potential rail; supplies full 40 V operating range and defines output headroom limits. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail input and output | Enables direct interfacing with sensors and ADCs across full supply range without external level-shifting components. |
| MUX-friendly/comparator inputs | Allows use in multiplexed sensor arrays or as zero-crossing detector without external hysteresis or clamping. |
| High EMIRR performance | Rejects >80 dB of RF interference up to 1 GHz, critical for reliable operation near infotainment RF sources. |
| AEC-Q100 Grade 1 qualification | Validated for –40°C to +125°C ambient operation with HBM ESD Level 2A and CDM Level C6 for automotive reliability. |
| Shutdown functionality | Reduces quiescent current to 30–45 µA per amplifier; controlled via SHDN pin with defined VIH/VIL thresholds. |
Applications
| High-Side Current Sensing | HEV/EV Inverter Signal Conditioning |
|---|---|
|
Use Scenario: Monitoring motor phase currents in traction inverters using shunt resistors placed between battery and IGBTs. IC Role / Device Role / Timing Role: Precision gain stage amplifying mV-level shunt voltage with minimal offset drift over temperature. Use Value: ±125 µV offset and ±0.3 µV/°C drift ensure <0.2% total error across –40°C to 125°C, meeting ASIL-B functional safety requirements. |
Use Scenario: Conditioning analog feedback signals from gate drivers and temperature sensors in 400 V–800 V EV power stages. IC Role / Device Role / Timing Role: High-speed buffer and level translator isolating sensitive control logic from high-dv/dt switching noise. Use Value: 130 dB CMRR and robust EMIRR suppress inverter noise coupling, preventing false triggering in real-time control loops. |
| Infotainment Power Supply Monitoring | ADAS Camera Power Rail Supervision |
|
Use Scenario: Real-time monitoring of 5 V/3.3 V DC-DC outputs powering display controllers and audio DSPs. IC Role / Device Role / Timing Role: Low-drift comparator detecting overvoltage/undervoltage faults with programmable hysteresis. Use Value: MUX-friendly inputs allow direct connection to multiple rail voltages; shutdown mode reduces system standby current. |
Use Scenario: Supervising 12 V camera module power rails in surround-view systems exposed to engine bay thermal cycling. IC Role / Device Role / Timing Role: Precision reference buffer and fault amplifier feeding diagnostic ADC channels. Use Value: 40 V supply tolerance and Grade 1 qualification ensure continuous operation during cold cranking (4.5 V) and load dump (36 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-voltage precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM7332QMA/NOPB | Wider supply (±16 V), higher quiescent current (2.5 mA), no shutdown, lower GBW (20 MHz), not AEC-Q100 qualified. | Lacks automotive qualification and rail-to-rail input; suitable only for non-safety-critical industrial test equipment. | Select only if higher bandwidth is required and AEC-Q100 compliance is unnecessary. |
| TSV911QDBVRQ1 | Lower supply (5.5 V max), lower offset (150 µV), no shutdown, smaller offset drift (±0.5 µV/°C), AEC-Q100 Grade 1. | Not rated for >12 V systems; limited to low-voltage ADAS domain controllers and lighting modules. | Choose for cost-sensitive 3.3 V/5 V applications where 40 V operation is not needed. |
Compared with LM7332QMA/NOPB and TSV911QDBVRQ1, OPA991SQDBVRQ1 uniquely combines 40 V operation, AEC-Q100 Grade 1 qualification, shutdown, and rail-to-rail input - making it the only option for high-side sensing in 48 V mild-hybrid and 800 V EV architectures.
Availability
OPA991SQDBVRQ1 is available at Aetrix Electronics and suitable for high-side current sensing, HEV/EV inverter feedback, and ADAS camera power supervision requiring stable component supply across extended temperature and automotive lifecycle demands.
Supply support for OPA991SQDBVRQ1 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 OPAx991-Q1 family was designed specifically for high-voltage, high-precision signal conditioning in AEC-Q100 Grade 1 automotive subsystems - including powertrain, battery management, and advanced driver assistance systems.
FAQ
What is the maximum supply voltage rating for OPA991SQDBVRQ1?
The OPA991SQDBVRQ1 supports a maximum supply voltage of 40 V (V+ to V−), with absolute maximum ratings up to 42 V. It operates across ±1.35 V to ±20 V dual supplies or 2.7 V to 40 V single supply, making it suitable for 12 V, 24 V, and 48 V automotive electrical systems. This rating is validated per AEC-Q100 stress testing protocols.
Does OPA991SQDBVRQ1 support rail-to-rail input operation?
Yes, OPA991SQDBVRQ1 supports true rail-to-rail input operation: its common-mode input voltage range extends from (V−) − 0.1 V to (V+) + 0.1 V. This enables direct connection to sensors and multiplexers operating at supply rails, and allows open-loop comparator use without external clamping - a feature confirmed in the functional block diagram and pin function table.
What is the typical input offset voltage and drift of OPA991SQDBVRQ1?
The OPA991SQDBVRQ1 has a typical input offset voltage of ±125 µV and a typical offset voltage drift of ±0.3 µV/°C over –40°C to +125°C. These values are specified in Section 5.7 Electrical Characteristics and verified across production lots, enabling high-accuracy DC measurements in automotive current sensing and reference buffering applications.
Can OPA991SQDBVRQ1 drive a 1 nF capacitive load without oscillation?
Yes, OPA991SQDBVRQ1 is characterized to drive up to 1 nF capacitive loads stably, as confirmed in Section 5.7 (CLOAD = 1000 pF) and Figure 5-27/5-28 showing overshoot and phase margin vs. capacitive load. This eliminates need for series isolation resistors in ADC input filtering or long-trace routing, reducing bill-of-materials and layout complexity.
Is OPA991SQDBVRQ1 qualified for automotive applications?
Yes, OPA991SQDBVRQ1 is AEC-Q100 qualified for automotive applications, Grade 1 (–40°C to +125°C ambient), with HBM ESD classification Level 2A (±1000 V) and CDM Level C6 (±1000 V). This qualification is explicitly stated in the Features section and reinforced by thermal data, packaging, and test conditions aligned to automotive reliability standards.
OPA991SQDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Standard
- Number of Circuits:
- 1
- 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
- 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:
- SOT-23-6
OPA991SQDBVRQ1 FAQ
1.How can I place an order for OPA991SQDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA991SQDBVRQ1 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 OPA991SQDBVRQ1 reliable?
The price and inventory of OPA991SQDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA991SQDBVRQ1 is usually 5 days.
3.What payment methods are accepted for OPA991SQDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA991SQDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA991SQDBVRQ1?
OPA991SQDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA991SQDBVRQ1 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 OPA991SQDBVRQ1?
For technical support, including OPA991SQDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA991SQDBVRQ1 requirements.
6.How does Aetrix verify that OPA991SQDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA991SQDBVRQ1 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 OPA991SQDBVRQ1 meets industry standards.
7.What is the process for return or replacement of OPA991SQDBVRQ1?
All OPA991SQDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA991SQDBVRQ1, 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 OPA991SQDBVRQ1 part is unused and in its original packaging.
Return procedure for OPA991SQDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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