My Inquiry
My Account
Texas Instruments OPA991QDBVRQ1
- Part No.:
- OPA991QDBVRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA991QDBVRQ1.pdf
- Description:
- IC OPAMP
- Quantity:
- Payment:
- Shipping:
Inventory:2,146
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA991QDBVRQ1 from Texas Instruments is an AEC-Q100 Grade 1 qualified automotive operational amplifier with rail-to-rail input and output, ±125 µV offset voltage, 4.5 MHz gain-bandwidth product, and 21 V/µs slew rate-designed for high-side current sensing and precision signal conditioning in HEV/EV motor control and ADAS sensor interfaces.
For engineers reviewing the OPA991QDBVRQ1 datasheet, OPA991QDBVRQ1 pinout, OPA991QDBVRQ1 application, or OPA991QDBVRQ1 equivalent, this page delivers verified electrical specs, package-validated pin functions, automotive-grade thermal and ESD performance data, and real-world use context for infotainment, body electronics, and powertrain current sensing designs.
Technical Context
The OPA991QDBVRQ1 employs a MUX-friendly front-end architecture enabling differential input voltages up to the full 40 V supply rail without phase reversal or clamping, supporting open-loop comparator operation and high-voltage multiplexed sensor inputs. Its dual-input-stage design (NCH/PCH) ensures stable rail-to-rail common-mode operation across –40°C to +125°C.
It integrates shutdown functionality with 3 µs disable time and 8 µs enable time, draws only 560 µA quiescent current per amplifier, and drives up to 1 nF capacitive loads while maintaining ≥60° phase margin-enabling direct interface with long traces, ADC drivers, and high-impedance sensor nodes in harsh automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2.7 V to 40 V (±1.35 V to ±20 V): supports 12 V/24 V/48 V automotive battery architectures without external level-shifting. |
| Input Offset Voltage | ±125 µV (typ): enables <1% error in 100 mΩ shunt-based current sensing at 1 A full-scale. |
| Gain-Bandwidth Product | 4.5 MHz: allows stable closed-loop gain of 100 at 45 kHz for anti-aliasing filter stages in 100 kSPS ADC systems. |
| Slew Rate | 21 V/µs: supports clean 10 Vpp output steps within 0.5 µs for fast transient response in overcurrent protection circuits. |
| Common-Mode Rejection | 130 dB (typ): rejects >99.9999% of common-mode noise in high-side shunt amplifiers with 40 V common-mode voltage. |
| Capacitive Load Drive | 1000 pF: eliminates need for isolation resistors when driving SAR ADC inputs or long PCB traces in ECU modules. |
| Quiescent Current | 560 µA per amplifier: enables always-on sensor monitoring in low-power body control modules without compromising battery life. |
Pinout & Package
OPA991QDBVRQ1 is packaged in a 5-pin SOT-23 (DBV) footprint measuring 2.9 mm × 2.8 mm, optimized for space-constrained automotive PCBs and thermally efficient mounting on copper pours.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Output | Amplifier output capable of sourcing/sinking ±75 mA; rail-to-rail swing within 5 mV of rails at no load (40 V supply). |
| 2 - V– | Negative Supply | Lowest potential supply terminal; accepts ground or negative rail down to –20 V in split-supply configurations. |
| 3 - IN+ | Noninverting Input | High-impedance (6 TΩ || 1 pF) node; operates up to V+ rail, enabling true rail-to-rail common-mode range. |
| 4 - IN– | Inverting Input | High-impedance (6 TΩ || 1 pF) node; supports differential input voltages up to full 40 V supply range without damage. |
| 5 - V+ | Positive Supply | Highest potential supply terminal; accepts up to +40 V, compatible with 36 V transients per ISO 7637-2 Pulse 5a. |
Key Features
| Feature | Design Value |
|---|---|
| MUX-Friendly Inputs | Differential input range extends to full supply rail (up to 40 V), eliminating external clamping diodes in multiplexed sensor front-ends. |
| Rail-to-Rail I/O | Input common-mode range from (V–) – 0.1 V to (V+) + 0.1 V; output swings within 5 mV of rails at no load-maximizing dynamic range in low-voltage systems. |
| Low Noise Performance | 10.8 nV/√Hz at 1 kHz and 1.8 µVPP (0.1–10 Hz): preserves SNR in precision thermocouple and bridge sensor amplification. |
| Robust EMIRR | ≥80 dB rejection at 900 MHz (per Figure 5-41): mitigates RF interference from cellular, Bluetooth, and radar modules in ADAS ECUs. |
| AEC-Q100 Grade 1 | Qualified from –40°C to +125°C ambient; HBM ESD 2A (±2 kV), CDM ESD C6 (±1 kV)-meets automotive reliability requirements. |
Applications
| High-Side Current Sensing | ADAS Radar Signal Conditioning |
|---|---|
|
Use Scenario: Monitoring motor phase current in EV inverter gate drivers using 100 µΩ shunt resistor with 40 V common-mode voltage. IC Role / Device Role / Timing Role: Precision difference amplifier with rail-to-rail input, rejecting common-mode noise while delivering low-drift output to isolated ΣΔ ADC. Use Value: ±125 µV offset ensures <0.5% full-scale error at 200 A; 130 dB CMRR suppresses PWM switching noise coupling into sense path. |
Use Scenario: Amplifying IF signals from 77 GHz radar receivers before digitization in autonomous driving domain controllers. IC Role / Device Role / Timing Role: Low-noise, wide-bandwidth buffer stage with 4.5 MHz GBW and 21 V/µs slew rate for preserving pulse fidelity. Use Value: 10.8 nV/√Hz input noise maintains >65 dB SNR at 100 kHz baseband; 1 nF drive capability interfaces directly with ADC input RC filters. |
| Infotainment Display Power Management | On-Board Charger Voltage Reference Buffer |
|
Use Scenario: Regulating backlight LED current in automotive LCD clusters using shunt-based feedback with 12 V supply. IC Role / Device Role / Timing Role: High-precision current-sense amplifier with shutdown control for dynamic dimming and fault detection. Use Value: 560 µA quiescent current enables always-on status monitoring; 3 µs shutdown disable time supports rapid brightness transitions. |
Use Scenario: Buffering 4.096 V reference voltage for isolated DC-DC controller ICs in 11 kW OBC modules operating at 400 V bus. IC Role / Device Role / Timing Role: Low-drift, high-PSRR unity-gain buffer isolating reference from switching noise and load transients. Use Value: ±0.3 µV/°C drift prevents >1 LSB error over temperature in 16-bit DAC references; 145 dB PSRR rejects 100 kHz switching ripple. |
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 |
|---|---|---|---|
| OPA991TDBVRQ1 | Same silicon die, but in 6-pin SOT-23 with integrated shutdown pin (SHDN); adds 3 µs disable/8 µs enable timing control. | Required where system-level power sequencing or low-power sleep modes are implemented-e.g., battery management units. | Select OPA991TDBVRQ1 when active shutdown control is needed; OPA991QDBVRQ1 is optimal for always-on analog front-ends. |
| LM7332QMA/NOPB | Wider supply (±16 V), higher quiescent current (1.3 mA), lower GBW (20 MHz), no AEC-Q100 qualification; not automotive-grade. | Acceptable for industrial test equipment or non-safety-critical body electronics where AEC-Q100 is not mandated. | Choose LM7332QMA/NOPB only for cost-sensitive non-automotive designs; OPA991QDBVRQ1 provides guaranteed automotive reliability and lower power. |
Compared with OPA991TDBVRQ1, OPA991QDBVRQ1 saves board space and simplifies layout by omitting shutdown logic, while matching all key precision specs; versus LM7332QMA/NOPB, it delivers AEC-Q100 compliance, 560 µA IQ, and superior 130 dB CMRR for safety-critical current sensing.
Availability
OPA991QDBVRQ1 is available at Aetrix Electronics and suitable for HEV/EV inverter control, ADAS radar signal chains, and automotive infotainment power management requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for OPA991QDBVRQ1 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 specializing in analog and embedded processing technologies, with leadership in automotive-grade signal chain and power management ICs.
The OPAx991-Q1 family was engineered specifically for high-voltage, high-precision automotive signal conditioning-targeting current sensing, sensor interfacing, and powertrain control applications demanding AEC-Q100 Grade 1 reliability.
FAQ
What is the maximum supply voltage rating for OPA991QDBVRQ1?
The OPA991QDBVRQ1 supports a total supply voltage (V+ to V–) of up to 40 V, with absolute maximum ratings extending to 42 V. This enables direct operation from 24 V and 48 V automotive battery rails, including transient spikes per ISO 7637-2, without external regulators or protection circuitry. The device remains fully functional across its entire 2.7 V to 40 V operating range.
Does OPA991QDBVRQ1 include a shutdown pin?
No, OPA991QDBVRQ1 does not include a shutdown pin-it is the 5-pin SOT-23 variant without SHDN functionality. Shutdown capability is only present in the 6-pin variant OPA991TDBVRQ1. For always-on applications such as continuous current monitoring or sensor biasing, OPA991QDBVRQ1's fixed-enable architecture eliminates control complexity and reduces PCB footprint.
What is the typical input offset voltage drift of OPA991QDBVRQ1 over temperature?
The OPA991QDBVRQ1 exhibits a typical input offset voltage drift of ±0.3 µV/°C across the full AEC-Q100 Grade 1 range (–40°C to +125°C). This ultra-low drift ensures minimal calibration drift in high-side shunt amplifiers used in battery management systems, where even 1 µV/°C would introduce >100 µV error over 100°C span-directly impacting state-of-charge accuracy.
Can OPA991QDBVRQ1 drive a 1 nF capacitive load stably?
Yes, OPA991QDBVRQ1 is explicitly characterized to drive up to 1000 pF capacitive loads while maintaining ≥60° phase margin and monotonic step response-verified in Figure 5-29 of the datasheet. This eliminates the need for series isolation resistors when interfacing with SAR ADC inputs, EMI filters, or long harness-connected sensors in automotive modules.
Is OPA991QDBVRQ1 qualified for automotive use under AEC-Q100?
Yes, OPA991QDBVRQ1 is fully AEC-Q100 qualified for Grade 1 operation (–40°C to +125°C ambient), with HBM ESD classification Level 2A (±2 kV) and CDM Level C6 (±1 kV). It meets automotive reliability, thermal, and stress testing requirements for deployment in powertrain, ADAS, and body electronics systems without derating.
OPA991QDBVRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- 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-23-5
OPA991QDBVRQ1 FAQ
1.How can I place an order for OPA991QDBVRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA991QDBVRQ1 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 OPA991QDBVRQ1 reliable?
The price and inventory of OPA991QDBVRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA991QDBVRQ1 is usually 5 days.
3.What payment methods are accepted for OPA991QDBVRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA991QDBVRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA991QDBVRQ1?
OPA991QDBVRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA991QDBVRQ1 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 OPA991QDBVRQ1?
For technical support, including OPA991QDBVRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA991QDBVRQ1 requirements.
6.How does Aetrix verify that OPA991QDBVRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA991QDBVRQ1 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 OPA991QDBVRQ1 meets industry standards.
7.What is the process for return or replacement of OPA991QDBVRQ1?
All OPA991QDBVRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA991QDBVRQ1, 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 OPA991QDBVRQ1 part is unused and in its original packaging.
Return procedure for OPA991QDBVRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA991QDBVRQ1 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…
