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Texas Instruments OPA310SQDCKRQ1
- Part No.:
- OPA310SQDCKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
OPA310SQDCKRQ1.pdf
- Description:
- AUTOMOTIVE, SINGLE, 5.5-V, 3-MHZ
- Quantity:
- Payment:
- Shipping:
Inventory:1,784
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Product details
Overview
OPA310SQDCKRQ1 from Texas Instruments is an automotive-grade, single-channel, rail-to-rail input/output operational amplifier with ±150mA output current capability, 3MHz gain-bandwidth product at 5.5V, and operation from 1.5V to 5.5V supply. It features fail-safe inputs (no diodes to V+), 165µA quiescent current per channel, and –40°C to 125°C operating range-designed for high-current LED biasing and current-sense amplification in traction inverters and battery management systems.
For engineers reviewing the OPA310SQDCKRQ1 datasheet, OPA310SQDCKRQ1 pinout, OPA310SQDCKRQ1 application, or OPA310SQDCKRQ1 equivalent, key selection criteria include its fast 0.9µs enable time from shutdown, robust 250pF capacitive load drive without oscillation, internal RFI/EMI filtering, and AEC-Q100 Grade 1 qualification for automotive powertrain and safety-critical subsystems.
Technical Context
The OPA310SQDCKRQ1 implements a unity-gain-stable voltage-feedback architecture optimized for low-voltage, high-output-current operation. Its input stage uses fail-safe ESD protection with no diode clamps to V+, enabling overvoltage tolerance beyond the positive rail. The output stage delivers symmetrical sourcing/sinking capability up to ±110mA at 5.5V with rail-to-rail swing and <10mV output voltage drop into 2kΩ loads.
It integrates internal RFI/EMI rejection filters on input pins and achieves 75dB electromagnetic interference rejection ratio at 1.8GHz. The device maintains phase margin ≥60° with 10pF load and drives up to 250pF capacitively without sustained oscillations-enabling direct interface with long traces, sensors, or MOSFET gates in noisy automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain bandwidth product | 3MHz typical at 5.5V - enables stable closed-loop operation up to ~2.5MHz with G=+1, supporting fast current-loop control in DC/DC converters. |
| Output current | ±110mA min at 5.5V - sufficient to directly drive high-brightness LEDs or gate multiple power MOSFETs without external buffers. |
| Input offset voltage | ±250µV typical - ensures ≤0.5mV error in precision current-sense applications across temperature. |
| Quiescent current | 165µA/ch typical - allows continuous operation in always-on BMS monitoring circuits with minimal battery drain. |
| Supply voltage range | 1.5V to 5.5V - supports direct connection to 3.3V or 5V rails and compatibility with low-voltage microcontrollers in body electronics. |
| Operating temperature | –40°C to 125°C - meets AEC-Q100 Grade 1 requirements for under-hood and powertrain locations. |
| EMI rejection | 75dB at 1.8GHz - suppresses cellular and radar band interference in EV charging and wireless power systems. |
Pinout & Package
OPA310SQDCKRQ1 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 thermal enhancement and is RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| IN+ | Noninverting input | Differential input node accepting signals from 0.1V below V– to 0.1V above V+; no diode clamp to V+ enables safe overvoltage tolerance. |
| IN– | Inverting input | Differential input node with identical common-mode range and fail-safe structure as IN+. |
| OUT | Amplifier output | Capable of sourcing/sinking ±110mA; swings within 10mV of rails into 10kΩ, enabling full dynamic range utilization in single-supply sensor interfaces. |
| V– | Negative supply / ground | Reference for single-supply operation; input common-mode extends 0.1V below this pin, supporting true rail-to-rail input at ground-referenced systems. |
| V+ | Positive supply | Accepts 1.5V–5.5V; supplies internal bias and output stage; ESD-protected with no input-to-V+ diodes. |
Key Features
| Feature | Design Value |
|---|---|
| Rail-to-rail I/O with fail-safe inputs | Enables direct interface with 0–5V ADCs and DACs while preventing latch-up during transients exceeding V+. |
| 250pF capacitive load drive | Eliminates need for isolation resistors when driving long PCB traces, cable assemblies, or gate capacitance of power switches. |
| Internal RFI/EMI filtering | Reduces susceptibility to 1.8GHz LTE/5G emissions in vehicle infotainment and telematics proximity zones. |
| Low 16nV/√Hz noise density | Preserves signal integrity in high-gain current-sense amplifiers used in battery cell monitoring with sub-milliohm shunts. |
| AEC-Q100 Grade 1 qualified | Validated for continuous operation at 125°C ambient, meeting reliability requirements for traction inverter control and OBC feedback loops. |
Applications
| Traction Inverter Current Sensing | Battery Management System Cell Monitoring |
|---|---|
Use Scenario: High-side current sensing in 400V–800V EV traction inverters using shunt resistors. IC Role / Device Role: Precision current-sense amplifier with rail-to-rail output driving isolated sigma-delta modulator inputs. Use Value: ±250µV offset and 165µA IQ enable accurate <1% current measurement at 100A while minimizing self-heating in compact power modules. | Use Scenario: Low-drift reference buffer and guard amplifier for 16-bit ADCs monitoring individual Li-ion cell voltages. IC Role / Device Role: Reference voltage follower and guard driver isolating high-impedance cell taps from leakage paths. Use Value: Fail-safe inputs prevent damage from cell reversal events; 16nV/√Hz noise preserves resolution down to 10µV LSB. |
| On-Board Charger Feedback Loop | Automotive Body Lighting Driver |
Use Scenario: Voltage and current regulation loop amplifier in bidirectional AC/DC OBCs operating up to 22kW. IC Role / Device Role: Error amplifier in isolated flyback or LLC controller feedback path. Use Value: 3MHz GBW supports >500kHz loop bandwidth for fast transient response; 250pF drive capability eliminates external compensation components. | Use Scenario: Constant-current LED driver for adaptive front lighting (AFS) and interior ambient lighting. IC Role / Device Role: Transconductance amplifier converting PWM dimming signals into precise LED current. Use Value: ±110mA output directly sources 100mA LED strings; rail-to-rail output enables full 0–100% dimming range from 3.3V MCU GPIO. |
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 20mA max output current; 20MHz GBW; no fail-safe inputs (diodes to V+); 1.2mA IQ | Not suitable for overvoltage-tolerant current sensing; better for wideband signal conditioning where power efficiency is secondary | Select when bandwidth >5MHz is required and input overvoltage risk is mitigated by external clamping. |
| TSV911QDBVRQ1 | Lower 60mA output current; 8MHz GBW; rail-to-rail I/O; 80µA IQ; no EMI filtering | Limited to low-power LED drivers and sensor interfaces; insufficient for high-current BMS shunt amplification | Prefer for cost-sensitive body electronics where 3MHz GBW and ±110mA drive are unnecessary. |
Compared with LM7321QDRQ1 and TSV911QDBVRQ1, OPA310SQDCKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, fail-safe inputs, ±110mA output, and integrated EMI filtering-making it the only option among the three qualified for direct use in traction inverter current-sense circuits without external protection or buffering.
Availability
OPA310SQDCKRQ1 is available at Aetrix Electronics and suitable for traction inverter current sensing, battery management system cell monitoring, and on-board charger feedback loops requiring stable component supply across automotive production lifecycles.
Supply support for OPA310SQDCKRQ1 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets.
The OPAx310-Q1 family is designed specifically for high-reliability automotive powertrain and energy management systems, emphasizing robustness, low power, and high output current in AEC-Q100-compliant packages.
FAQ
What is the maximum output current capability of the OPA310SQDCKRQ1?
The OPA310SQDCKRQ1 delivers a minimum short-circuit current of ±110mA at 5.5V supply across temperature, with typical sourcing/sinking capability of ±150mA at 5.5V. This enables direct drive of high-current loads such as LED strings or power MOSFET gates without external buffers, and supports parallel configurations for higher current demands in traction inverter auxiliary supplies.
Does the OPA310SQDCKRQ1 have built-in EMI filtering?
Yes, the OPA310SQDCKRQ1 features internal RFI and EMI filtered input pins, achieving 75dB electromagnetic interference rejection ratio at 1.8GHz. This design eliminates the need for external RC filters in automotive environments exposed to cellular, Wi-Fi, and radar emissions-critical for reliable operation in on-board chargers and wireless power receivers where OPA310SQDCKRQ1 is commonly deployed.
Is the OPA310SQDCKRQ1 pin-compatible with other devices in the OPAx310-Q1 family?
No, the OPA310SQDCKRQ1 is a 5-pin SC70 device without shutdown functionality, whereas the OPA310S-Q1 variant includes a sixth SHDN pin. Pinouts differ between the two variants: OPA310SQDCKRQ1 uses SC70 pin 1=IN+, 2=V–, 3=IN–, 4=OUT, 5=V+; OPA310S-Q1 reassigns pin 5 to SHDN and moves V+ to pin 6. Therefore, OPA310SQDCKRQ1 is not pin-compatible with OPA310S-Q1 or any dual/quad variants.
What is the operating temperature range for the OPA310SQDCKRQ1?
The OPA310SQDCKRQ1 is rated for continuous operation from –40°C to +125°C ambient temperature and is qualified to AEC-Q100 Grade 1 standards. This makes it suitable for under-hood applications including traction inverter control boards, battery disconnect units, and DC/DC converter feedback circuits where junction temperatures may exceed 150°C under worst-case conditions.
Can the OPA310SQDCKRQ1 drive capacitive loads without oscillation?
Yes, the OPA310SQDCKRQ1 is characterized to drive up to 250pF of capacitive load without sustained oscillations when configured with unity gain and a 10kΩ load to mid-supply. This capability allows direct connection to long PCB traces, cable assemblies, or MOSFET gates in automotive motor control and lighting applications-eliminating the need for external isolation resistors or compensation networks typically required with standard op amps.
OPA310SQDCKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- 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-70-6
OPA310SQDCKRQ1 FAQ
1.How can I place an order for OPA310SQDCKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA310SQDCKRQ1 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 OPA310SQDCKRQ1 reliable?
The price and inventory of OPA310SQDCKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA310SQDCKRQ1 is usually 5 days.
3.What payment methods are accepted for OPA310SQDCKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA310SQDCKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA310SQDCKRQ1?
OPA310SQDCKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA310SQDCKRQ1 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 OPA310SQDCKRQ1?
For technical support, including OPA310SQDCKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA310SQDCKRQ1 requirements.
6.How does Aetrix verify that OPA310SQDCKRQ1 is sourced from the original manufacturer or authorized distributors?
All OPA310SQDCKRQ1 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 OPA310SQDCKRQ1 meets industry standards.
7.What is the process for return or replacement of OPA310SQDCKRQ1?
All OPA310SQDCKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with OPA310SQDCKRQ1, 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 OPA310SQDCKRQ1 part is unused and in its original packaging.
Return procedure for OPA310SQDCKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA310SQDCKRQ1 Tags
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