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Texas Instruments INA310A1QDGKRQ1
- Part No.:
- INA310A1QDGKRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
INA310A1QDGKRQ1.pdf
- Description:
- AEC-Q100-4-V TO 110-V1.3-MHZ ULT
- Quantity:
- Payment:
- Shipping:
Inventory:2,268
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Product details
Overview
INA310A1QDGKRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (−40°C to +125°C) ultra-precise current sense amplifier with integrated open-drain comparator and 0.6 V internal reference, designed for high-side or low-side shunt monitoring in automotive power systems. It delivers 20 V/V fixed gain, 1.3 MHz bandwidth, ±20 µV max offset voltage, and operates across −4 V to +110 V common-mode range on a 2.7 V to 20 V supply - enabling fast overcurrent protection in eTurbo and EPS systems.
For engineers reviewing the INA310A1QDGKRQ1 datasheet, INA310A1QDGKRQ1 pinout, INA310A1QDGKRQ1 application, or INA310A1QDGKRQ1 equivalent, key selection criteria include its guaranteed 0.15% max gain error, 160 dB CMRR, latching comparator mode, 1 µs propagation delay, and VSSOP-8 package compatibility with space-constrained automotive PCB layouts.
Technical Context
The INA310A1QDGKRQ1 employs a zero-drift precision amplifier topology with matched internal resistor network to achieve 0.15% gain error and ±0.25 µV/°C offset drift. Its input stage supports true rail-to-rail common-mode operation independent of supply voltage, enabling direct connection to battery rails up to 110 V while powered from a 5 V microcontroller domain.
Integrated comparator features 0.6 V internal reference, 8 mV hysteresis, and RESET-controlled latching mode - allowing transparent overcurrent detection or fault-hold behavior without external logic. Propagation delay remains ≤1 µs from shunt voltage exceedance to CMPOUT assertion, critical for ISO 26262 ASIL-B–aligned protection schemes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | 20 V/V - fixed precision ratio enabling accurate scaling of mV-level shunt voltage to measurable output range |
| Common-mode range | −4 V to +110 V - supports direct high-side sensing on 48 V/60 V battery systems without level-shifting |
| Bandwidth | 1.3 MHz - enables detection of fast transient overcurrent events in <1 µs response window |
| Offset voltage | ±20 µV max - ensures <1 mV error at 50 mV sense voltage, critical for low-ohmic shunt accuracy |
| CMRR | 160 dB - rejects noise from high-dv/dt switching nodes (e.g., inverter legs) in motor drives |
| Supply range | 2.7 V to 20 V - compatible with 3.3 V/5 V MCU domains while surviving load-dump transients |
| Comparator threshold | 0.6 V ±20 mV - stable reference for precise trip-point setting via external resistor divider |
Pinout & Package
VSSOP-8 package (3.00 mm × 4.90 mm), thermally enhanced for automotive under-hood environments; 0.65 mm pitch, exposed thermal pad optional per TI design guidelines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VS | Power supply input | Accepts 2.7 V–20 V; powers both amplifier and comparator; decoupling required within 1 cm |
| OUT | Amplifier output | Analog output scaled by 20× VSENSE; drives ADC or comparator divider; swing to VS–150 mV min |
| CMPIN | Comparator analog input | Accepts 0–5.5 V; connected to resistor divider from OUT; bias current <20 nA near 0.6 V threshold |
| GND | Analog ground reference | Single-point return for IN+, IN−, VS, and CMPOUT pull-up; separates from power ground if needed |
| RESET | Comparator control input | Active-high latching enable; open or grounded = transparent mode; tied to VS = latch-on-trip |
| CMPOUT | Open-drain comparator output | Drives fault interrupt line; requires external pull-up to 0–20 V domain; sinks ≥2.35 mA at 350 mV VOL |
| IN− | Shunt negative sense | Connect to load side (high-side) or ground side (low-side); handles −20 V survival voltage |
| IN+ | Shunt positive sense | Connect to bus side (high-side) or load side (low-side); withstands +120 V survival voltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q100 Grade 1 qualification | Validated for −40°C to +125°C ambient operation with full parametric compliance across temperature |
| Integrated 0.6 V comparator reference | Eliminates external voltage reference IC and reduces BOM count while maintaining ±20 mV threshold accuracy |
| Latching comparator mode | Enables persistent fault signaling until explicit reset - essential for diagnostic logging in ASIL-B systems |
| 160 dB DC CMRR | Rejects common-mode noise from 48 V bus transients without requiring matched PCB routing |
| Zero-drift architecture | Maintains ±20 µV offset and 10 ppm/°C gain drift over full automotive temperature range |
Applications
| eTurbo / Electric Turbocharger | Electric Power Steering (EPS) |
|---|---|
Use Scenario: Real-time phase current monitoring in 48 V eTurbo motor inverter during boost pressure regulation. IC Role / Device Role / Timing Role: High-side current sense amplifier feeding ADC and comparator for <10 µs overcurrent shutdown. Use Value: 1.3 MHz bandwidth captures fast IGBT turn-off spikes; −4 V to 110 V range accommodates regenerative braking voltage reversals. | Use Scenario: Torque motor current sensing in column-assist EPS with safety-critical torque feedback loop. IC Role / Device Role / Timing Role: Low-side shunt monitor providing redundant current data to dual-core MCU for ASIL-D torque verification. Use Value: ±20 µV offset ensures <0.5% full-scale error at 50 mV sense voltage; 160 dB CMRR suppresses PWM noise from adjacent gate drivers. |
| Starter/Generator (Belt-Driven or P0/P1) | Regenerative Braking System |
Use Scenario: Bidirectional current measurement during engine cranking (high surge) and generator mode (regeneration). IC Role / Device Role / Timing Role: Dual-polarity capable amplifier with comparator latching to flag overcurrent during cold-crank peak loads. Use Value: −4 V common-mode minimum supports reverse-current detection; 1 µs comparator delay enables sub-cycle fault response. | Use Scenario: Inverter leg current monitoring during rapid energy recovery into 48 V battery during deceleration. IC Role / Device Role / Timing Role: High-bandwidth current feedback for real-time torque control and overcurrent protection in bidirectional converters. Use Value: 20 V/V gain optimizes dynamic range for 0–200 A sensing with 500 µΩ shunt; 2.5 V/µs slew rate prevents distortion on fast current ramps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current sense amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| INA240A1QDRQ1 | Same 20 V/V gain, but 4 V/V to 500 V/V programmable via external resistors; 100 kHz bandwidth; no integrated comparator | Lacks comparator and reference; requires external fault logic; lower bandwidth limits fast overcurrent response | Select when system already implements comparator logic and prioritizes flexibility over integrated protection |
| MAX40056ATA+T | 20 V/V gain, 1.5 MHz bandwidth, 0.6 V reference, but only −0.2 V to 65 V common-mode range; not AEC-Q100 qualified | Insufficient for 48 V+ battery rail monitoring; lacks automotive qualification for safety-critical modules | Select only for non-automotive industrial applications requiring higher bandwidth and lower cost |
Compared with INA240A1QDRQ1 and MAX40056ATA+T, the INA310A1QDGKRQ1 uniquely combines AEC-Q100 Grade 1 qualification, 110 V common-mode capability, integrated comparator with latching, and 1.3 MHz bandwidth - making it the only drop-in solution for ASIL-B–compliant high-voltage automotive current protection.
Availability
INA310A1QDGKRQ1 is available at Aetrix Electronics and suitable for electric power steering, eTurbo control, and regenerative braking systems requiring stable component supply, long-term automotive lifecycle support, and traceable AEC-Q100 manufacturing.
Supply support for INA310A1QDGKRQ1 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-grade signal conditioning and power management ICs.
The INA310x-Q1 product line was engineered specifically for high-reliability automotive current sensing - delivering precision, speed, and functional safety features required in next-generation 48 V mild-hybrid and electric vehicle architectures.
FAQ
What is the maximum common-mode voltage the INA310A1QDGKRQ1 can handle during normal operation?
The INA310A1QDGKRQ1 supports a continuous operational common-mode input range of −4 V to +110 V, independent of supply voltage. This allows direct high-side sensing on 48 V and 60 V battery systems without external level-shifting circuitry. The device also survives −20 V to +120 V during fault conditions, meeting automotive load-dump and reverse-battery requirements.
Does the INA310A1QDGKRQ1 require external components to set the overcurrent trip point?
Yes - the INA310A1QDGKRQ1 uses an external resistor divider from the OUT pin to GND to scale the amplified shunt voltage down to the 0.6 V comparator threshold at CMPIN. TI recommends keeping the total divider resistance below 100 kΩ to minimize error from comparator input bias current. No external reference or op-amp is needed due to the integrated 0.6 V reference.
How does the RESET pin affect comparator behavior in the INA310A1QDGKRQ1?
The RESET pin configures the comparator's operating mode: when left open or pulled to GND, the INA310A1QDGKRQ1 operates in transparent mode (CMPOUT follows CMPIN in real time); when pulled high to VS, it enters latching mode - CMPOUT stays high after first overcurrent event until RESET is actively pulled low or released. This enables fault-hold functionality for diagnostic logging in safety-critical systems.
What is the typical propagation delay from overcurrent event to CMPOUT assertion in the INA310A1QDGKRQ1?
The total propagation delay from shunt voltage exceeding the programmed trip threshold to CMPOUT going low (open-drain active) is 1 µs under small-signal overdrive conditions. This includes amplifier settling, resistor-divider scaling, and comparator decision time. The value is guaranteed across −40°C to +125°C and forms the basis for fast overcurrent protection timing budgets in ISO 26262-compliant designs using the INA310A1QDGKRQ1.
Is the INA310A1QDGKRQ1 pin-compatible with other members of the INA310x-Q1 family?
Yes - all INA310x-Q1 variants (A1/A2/A3/A4/A5 and B1/B2/B3/B4/B5) share identical VSSOP-8 pinout and footprint. Gain selection is internal and fixed per part number; swapping to INA310A2QDGKRQ1 (50 V/V) or INA310A3QDGKRQ1 (100 V/V) requires only a bill-of-materials change - no PCB redesign. All share identical electrical interface, RESET functionality, and comparator architecture.
INA310A1QDGKRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Sense
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 2.5V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.3 MHz
- Current - Input Bias:
- 20 µA
- Voltage - Input Offset:
- 30 µV
- Current - Supply:
- 1.6mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2.7 V
- Voltage - Supply Span (Max):
- 20 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
INA310A1QDGKRQ1 FAQ
1.How can I place an order for INA310A1QDGKRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for INA310A1QDGKRQ1 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 INA310A1QDGKRQ1 reliable?
The price and inventory of INA310A1QDGKRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for INA310A1QDGKRQ1 is usually 5 days.
3.What payment methods are accepted for INA310A1QDGKRQ1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for INA310A1QDGKRQ1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for INA310A1QDGKRQ1?
INA310A1QDGKRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your INA310A1QDGKRQ1 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 INA310A1QDGKRQ1?
For technical support, including INA310A1QDGKRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your INA310A1QDGKRQ1 requirements.
6.How does Aetrix verify that INA310A1QDGKRQ1 is sourced from the original manufacturer or authorized distributors?
All INA310A1QDGKRQ1 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 INA310A1QDGKRQ1 meets industry standards.
7.What is the process for return or replacement of INA310A1QDGKRQ1?
All INA310A1QDGKRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with INA310A1QDGKRQ1, 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 INA310A1QDGKRQ1 part is unused and in its original packaging.
Return procedure for INA310A1QDGKRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
INA310A1QDGKRQ1 Tags
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STMicroelectronics
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Microchip Technology
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