My Inquiry
My Account
Texas Instruments OPA310QDCKRQ1
- Part No.:
- OPA310QDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
OPA310QDCKRQ1.pdf
- Description:
- AUTOMOTIVE, SINGLE, 5.5-V, 3-MHZ
- Quantity:
- Payment:
- Shipping:
Inventory:1,617
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA310QDCKRQ1 from Texas Instruments is an automotive-grade, single-channel, rail-to-rail input/output operational amplifier optimized for high-output-current applications. It delivers ±150mA short-circuit current at 5.5V, features 3MHz gain-bandwidth product, ±250µV typical input offset voltage, and operates from 1.5V to 5.5V supply. It is used in battery management systems (BMS) and traction inverter current sensing.
For engineers reviewing the OPA310QDCKRQ1 datasheet, OPA310QDCKRQ1 pinout, OPA310QDCKRQ1 application, or OPA310QDCKRQ1 equivalent, key selection criteria include its AEC-Q100 Grade 1 qualification, fast enable time (1.6µs), low 165µA quiescent current, RFI/EMI-filtered inputs, and ability to drive 250pF capacitive loads without oscillation.
Technical Context
The OPA310QDCKRQ1 employs a robust CMOS input stage with fail-safe inputs-no diodes to V+-enabling overvoltage tolerance beyond the positive rail. Its internal current-limit and thermal shutdown protections support reliable operation under sustained high-current conditions in automotive power stages.
This op amp achieves unity-gain stability while delivering 3V/µs slew rate and 0.0005% THD+N at 1kHz, making it suitable for precision analog front-ends in HEV/EV DC/DC converters and on-board chargers where signal integrity and output drive strength are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.5V to 5.5V - supports wide-input automotive battery rails including start-stop and cold-crank scenarios. |
| Gain Bandwidth Product | 3MHz at 5.5V - enables stable closed-loop operation up to ~300kHz with G=10, suitable for active filtering in BMS voltage monitoring. |
| Output Current | ±150mA typical ISC - drives LED strings, gate resistors, or current-sense amplifiers directly without external buffers. |
| Input Offset Voltage | ±250µV typical - ensures <1mV error in 4–20mA transmitter loops or shunt-based current measurement at 100mΩ. |
| Quiescent Current | 165µA/ch typical - enables always-on monitoring circuits in low-power vehicle subsystems without compromising battery life. |
| Operating Temperature | –40°C to +125°C - meets AEC-Q100 Grade 1 requirements for under-hood and powertrain electronics. |
| Capacitive Load Drive | 250pF no sustained oscillation - allows direct connection to long PCB traces or EMI filter networks in motor control feedback paths. |
Pinout & Package
OPA310QDCKRQ1 is packaged in a 5-pin SC70 (DCK) package measuring 2.0mm × 2.1mm, optimized for space-constrained automotive modules. The package includes an exposed pad for enhanced thermal dissipation in high-current operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Noninverting input | High-impedance CMOS node; accepts rail-to-rail common-mode signals from –0.1V to V+ + 0.1V at 5.5V supply. |
| IN– | Inverting input | High-impedance CMOS node; supports differential sensing with >75dB CMRR across temperature. |
| OUT | Amplifier output | Class-AB output stage capable of sourcing/sinking ±150mA; swings within 0.75mV of rails at light load. |
| V– | Negative supply / ground | Reference for single-supply operation; input pins tolerate –0.5V below V– (current-limited to 10mA). |
| V+ | Positive supply | Accepts up to 5.5V; internal protection prevents latch-up during transients; no input diode to V+. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O | Enables full dynamic range utilization in 3.3V or 5V systems, reducing need for level-shifting in ADC driver stages. |
| Internal RFI/EMI filtering | Reduces susceptibility to 1.8GHz cellular interference in infotainment-adjacent power electronics without external RC filters. |
| No phase reversal on overdrive | Prevents catastrophic control loop instability when inputs exceed supply rails-critical in fault-detection comparators. |
| Fail-safe input structure | Eliminates input-to-V+ diodes, allowing safe operation with inputs up to 6.0V regardless of V+ level-ideal for sensor biasing in mixed-voltage domains. |
| Low thermal drift | ±0.5µV/°C offset drift ensures <10µV total drift over –40°C to +125°C, maintaining accuracy in engine bay environments. |
Applications
| Battery Management Systems (BMS) | Traction Inverter Current Sensing |
|---|---|
Use Scenario: High-side shunt-based current measurement in 400V/800V EV battery packs with isolation requirements. IC Role / Device Role / Timing Role: Precision current-sense amplifier with gain-setting resistors; provides analog output to isolated sigma-delta ADC. Use Value: ±150mA output drive sustains signal integrity into 10kΩ isolation amplifier inputs; 3MHz bandwidth captures fast transient currents during regenerative braking. | Use Scenario: Closed-loop phase current feedback in 3-phase IGBT/SiC inverter legs for torque control. IC Role / Device Role / Timing Role: Fast-settling (1.3µs to 0.1%) buffer for Hall-effect or shunt-based current sensors feeding motor control MCU. Use Value: 3V/µs slew rate and 250pF drive capability allow direct interface to long PCB traces and EMI filters without added compensation. |
| On-Board Charger (OBC) Voltage Regulation | HEV/EV DC/DC Converter Feedback |
Use Scenario: Secondary-side voltage reference buffer and error amplifier in isolated 3.3kW bidirectional OBC designs. IC Role / Device Role / Timing Role: Low-drift reference buffer driving optocoupler LED or digital isolator input in regulation loop. Use Value: ±250µV offset and ±0.5µV/°C drift minimize regulation error across temperature; 165µA IQ reduces standby losses. | Use Scenario: Error amplifier in 48V–12V DC/DC converter for ADAS domain controllers. IC Role / Device Role / Timing Role: Compensated transconductance amplifier in voltage-mode control loop with 3MHz GBW enabling >100kHz crossover. Use Value: Unity-gain stability and 60° phase margin ensure robust loop response with minimal external components; RFI filtering suppresses switching noise coupling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM7321QDRQ1 | Higher 16V max supply, lower 2.5MHz GBW, ±80mA output current, no integrated RFI filter. | Preferred for higher-voltage auxiliary supplies; less suitable for 250pF-capacitive-load or high-EMI environments. | Select when operating above 5.5V or requiring higher absolute max ratings; avoid where EMI immunity or capacitive drive is critical. |
| TSV911QDBVRQ1 | Lower 1.5–5.5V supply range, 8MHz GBW, ±50mA output, no fail-safe inputs (diodes to V+ present). | Better for high-speed small-signal conditioning; unsuitable for overvoltage-tolerant sensor interfaces or high-current drive. | Choose for bandwidth-critical signal chains where input overvoltage risk is absent; not recommended for shunt-based current sensing with rail excursions. |
Compared with LM7321QDRQ1 and TSV911QDBVRQ1, the OPA310QDCKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, ±150mA output, fail-safe inputs, and integrated RFI filtering-making it the only option qualified for direct high-current, high-EMI, rail-overdriving roles in traction inverters and BMS main packs.
Availability
OPA310QDCKRQ1 is available at Aetrix Electronics and suitable for battery management systems (BMS), traction inverters, and on-board chargers (OBC) requiring stable component supply across automotive production lifecycles.
Supply support for OPA310QDCKRQ1 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 electronics and functional safety.
The OPAx310-Q1 family was designed specifically for AEC-Q100 Grade 1 automotive powertrain and charging applications demanding high output current, rail-to-rail operation, and robust EMI immunity in harsh electrical environments.
FAQ
What is the maximum capacitive load the OPA310QDCKRQ1 can drive without oscillation?
The OPA310QDCKRQ1 can drive up to 250pF of capacitive load without sustained oscillations under unity-gain configuration with RL = 10kΩ to VS/2. This capability eliminates the need for external isolation resistors in many layout-sensitive applications such as motor current feedback paths or long-trace sensor interfaces. The device maintains ≥40° phase margin at 75pF and remains stable with no compensation required up to the specified 250pF limit.
Does the OPA310QDCKRQ1 have shutdown functionality?
No, the OPA310QDCKRQ1 does not include a shutdown pin. That function is exclusive to the OPA310S-Q1 variant (e.g., OPA310SQDCKRQ1), which adds a dedicated SHDN terminal with 0.9µs enable time. The OPA310QDCKRQ1 is a standard single-channel op amp without enable/disable control; power management must be handled externally via supply sequencing or series FETs if needed.
Is the OPA310QDCKRQ1 qualified for automotive use?
Yes, the OPA310QDCKRQ1 is explicitly qualified to AEC-Q100 Grade 1 standards (–40°C to +125°C ambient), with built-in thermal shutdown, current limiting, and robust ESD protection (±8kV HBM, ±1.5kV CDM). It is intended for safety-critical automotive subsystems including battery management, traction inverters, and onboard chargers-fully documented in TI's SBOSAI0B datasheet revision September 2024.
What is the input common-mode voltage range of the OPA310QDCKRQ1 at 5.5V supply?
At VS = 5.5V, the OPA310QDCKRQ1 supports a rail-to-rail input common-mode range of (V–) – 0.1V to (V+) + 0.1V across –40°C to +125°C. This extended range-enabled by its fail-safe input architecture with no diodes to V+-allows direct interfacing with sensors or dividers operating slightly beyond the supply rails, a key advantage in high-side current sensing and fault-monitoring circuits.
How does the OPA310QDCKRQ1 handle electromagnetic interference (EMI)?
The OPA310QDCKRQ1 integrates internal RFI and EMI filtered input pins, achieving 75dB rejection at 1.8GHz per the EMIRR specification. This on-die filtering significantly reduces sensitivity to cellular, Bluetooth, and switching converter noise without requiring external ferrite beads or RC networks-validated in automotive EMC testing and critical for reliable operation in infotainment-proximate power electronics like DC/DC converters and OBC control boards.
OPA310QDCKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Standard
- Number of Circuits:
- 1
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 3V/µs
- Gain Bandwidth Product:
- 3 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 250 µV
- Current - Supply:
- 165µA
- Current - Output / Channel:
- 150 mA
- Voltage - Supply Span (Min):
- 1.5 V
- Voltage - Supply Span (Max):
- 5.5 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-5
OPA310QDCKRQ1 FAQ
1.How can I place an order for OPA310QDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA310QDCKRQ1 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 OPA310QDCKRQ1 reliable?
The price and inventory of OPA310QDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA310QDCKRQ1 is usually 5 days.
3.What payment methods are accepted for OPA310QDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA310QDCKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA310QDCKRQ1?
OPA310QDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA310QDCKRQ1 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 OPA310QDCKRQ1?
For technical support, including OPA310QDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA310QDCKRQ1 requirements.
6.How does Aetrix verify that OPA310QDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA310QDCKRQ1 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 OPA310QDCKRQ1 meets industry standards.
7.What is the process for return or replacement of OPA310QDCKRQ1?
All OPA310QDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA310QDCKRQ1, 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 OPA310QDCKRQ1 part is unused and in its original packaging.
Return procedure for OPA310QDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA310QDCKRQ1 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…
