INA281A4QDBVRQ1 Texas Instruments Integrated Circuit (SOT23 (5-Pin)) In Stock
INA281A4QDBVRQ1 is an AEC-Q100 automotive current sense amplifier by Texas Instruments supporting -4 V to 110 V common-mode voltage. Key specs: 1.3 MHz bandwidth, 120 dB minimum CMRR, -40°C to +125°C operation in a 5-pin SOT-23 package. Available in stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- SOT23 (5-Pin)
- Pin Count
- 5
- Lifecycle
- ACTIVE
- Datasheet
- INA281A4QDBVRQ1 Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $1.6080(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of INA281A4QDBVRQ1?
- AEC-Q100 qualified with -4 V to 110 V common-mode range allows high-side current sensing directly on 48 V automotive bus and beyond without supply-rail isolation circuits
- 120 dB minimum / 140 dB typical CMRR delivers accurate shunt measurements even with large common-mode transients from inductive load switching in EV and 48 V mild-hybrid systems
- 1.3 MHz bandwidth and -40°C to +125°C temperature range enable fast overcurrent detection in automotive motor drives, battery management systems, and DC-DC converters
What is INA281A4QDBVRQ1 used for?
INA281A4QDBVRQ1 is designed for high-side current monitoring in automotive 48 V mild-hybrid powertrains, electric vehicle battery management systems, and DC-DC converter output monitoring where the shunt sits at up to 110 V above ground. Its 1.3 MHz bandwidth supports fast-response overcurrent protection loops in BLDC motor controllers and on-board chargers operating at switching frequencies above 100 kHz. The device also fits industrial motor drives and solar power optimizers that require precision current measurement on high-voltage rails with automotive-grade reliability.
What are the specifications of INA281A4QDBVRQ1?
| Pbfree Code | Yes |
| Date Of Intro | 2020-11-08 |
| YTEOL | 15 |
| Amplifier Type | OPERATIONAL AMPLIFIER |
| Architecture | VOLTAGE-FEEDBACK |
| Average Bias Current-Max (IIB) | 30 µA |
| Bias Current-Max (IIB) @25C | 30 µA |
| Common Mode Voltage-Max | 110V |
| Common-mode Reject Ratio-Min | 120dB |
| Common-mode Reject Ratio-Nom | 140dB |
| Frequency Compensation | NO |
| Input Offset Voltage-Max | 200 µV |
| JESD-30 Code | R-PDSO-G5 |
| JESD-609 Code | e4 |
| Low-Bias | NO |
| Low-Offset | YES |
| Micropower | NO |
| Number of Functions | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | TSOP5,.11,37 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power | NO |
| Programmable Power | NO |
| Screening Level | AEC-Q100 |
| Slew Rate-Nom | 2.5V/us |
| Supply Current-Max | 2.25mA |
| Supply Voltage Limit-Max | 22V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.95mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Unity Gain BW-Nom | 900 |
| Voltage Gain-Nom | 200 |
| Wideband | NO |
| Package | SOT23 (5-Pin) |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.33.00.01 |
| Country of Origin | Mainland China, Philippines, Taiwan, Thailand |
Where can I find the INA281A4QDBVRQ1 datasheet?
INA281A4QDBVRQ1 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for INA281A4QDBVRQ1?
Compatible alternatives and drop-in replacements for INA281A4QDBVRQ1:
Frequently Asked Questions
What common-mode voltage range does INA281A4QDBVRQ1 support and which automotive bus voltages does that cover?
INA281A4QDBVRQ1 supports a common-mode input range of -4 V to +110 V, covering 12 V conventional automotive, 24 V commercial vehicle, and 48 V mild-hybrid bus voltages with substantial headroom. The -4 V minimum allows negative-rail transient survival during inductive load clamp events common in 12 V systems, while the 110 V maximum accommodates 48 V bus peaks reaching 72 V during regenerative braking load-dump transients with a comfortable 38 V safety margin.
How does INA281A4QDBVRQ1's 140 dB typical CMRR compare with standard op-amp based current sensing circuits?
A discrete op-amp difference amplifier built with 0.1% resistors achieves roughly 66 dB CMRR at best, meaning INA281A4QDBVRQ1's 140 dB typical CMRR is 74 dB better — a factor of 5,000x improvement in common-mode rejection. On a 48 V bus with 5 V transients, the discrete circuit would inject 1.8 mV of common-mode error into a 10 mΩ shunt reading, while INA281A4QDBVRQ1 keeps this error below 0.001 mV, critical for resolving milliamp-level currents in battery state-of-charge algorithms.
What bandwidth does INA281A4QDBVRQ1 provide and how does it enable overcurrent protection response in switching power stages?
INA281A4QDBVRQ1 delivers 1.3 MHz small-signal bandwidth, which translates to a rise-time response of approximately 270 ns — fast enough to detect a single overcurrent pulse in a 100 kHz switching converter within one switching cycle. Automotive BLDC motor controllers using 20 kHz PWM can implement cycle-by-cycle current limiting with this device, preventing shoot-through damage in H-bridge stages without a separate dedicated overcurrent comparator, saving 1–2 BOM components per phase.
Which gain option does the 'A4' suffix designate in INA281A4QDBVRQ1 and how does that influence shunt resistor selection?
The 'A4' suffix designates a fixed gain of 200 V/V in the INA281 family. With a 200 V/V gain and a 5 V output swing, the maximum differentially sensed shunt voltage is 25 mV, corresponding to a shunt resistor of 1 mΩ for 25 A full-scale or 5 mΩ for 5 A full-scale current measurement. Selecting smaller shunt values in the 0.5 mΩ to 2 mΩ range reduces power loss in high-current 48 V automotive paths while keeping the sense voltage within the amplifier's linear range, balancing accuracy against thermal dissipation in the shunt.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
More from Texas Instruments
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $2.8000 | $2.80 |
| 10+ | $2.2300 | $22.30 |
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| 100+ | $1.7363 | $173.63 |
| 250+ | $1.6420 | $410.49 |
| 500+ | $1.6080 | $804.02 |
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