component
INA281B2QDBVRQ1
Public Made by Adomby adom
Texas Instruments Current-Sensing Amplifiers, SOT-23-5. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownINA281B2QDBVRQ1
Texas Instruments · Current-Sensing Amplifiers · SOT-23-5
INA281B2QDBVRQ1 from Texas Instruments, in a SOT-23-5. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | OUT | output | Output voltage pin, which per the absolute maximum ratings must stay between GND - 0.3 V and VS + 0.3 V. |
| 2 | GND | power_in | Ground reference pin for the device. |
| 3 | Vs | power_in | Power supply pin with a recommended operating supply range of 2.7 V to 20 V and an absolute maximum range of -0.3 V to 22 V. |
| 4 | IN+ | input | Shunt resistor positive sense input, with a common-mode range of -4 V to 110 V in operation and -20 V to 120 V survival. |
| 5 | IN- | input | Shunt resistor negative sense input, with a common-mode range of -4 V to 110 V in operation and -20 V to 120 V survival. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | Operational Amplifier/Comparator |
| Pins | 5 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Common-mode input range | VCM | -4 | 110 | V | TA = -40 °C to +125 °C | 4 | |
| Common-mode rejection ratio, input referred | CMRR | 120 | 140 | dB | -4 V ≤ VCM ≤ 110 V, TA = -40 °C to +125 °C | 4 | |
| Offset voltage, input referred | Vos | -300 | 55 | 300 | µV | INA281x2-Q1 | 4 |
| Offset voltage drift | dVos/dT | -1 | 0.1 | 1 | µV/℃ | TA = -40 ℃ to +125 ℃ | 4 |
| Power supply rejection ratio, input referred | PSRR | -10 | 1.5 | 10 | µV/V | 2.7 V ≤ VS ≤ 20 V, TA = -40 °C to +125 °C | 4 |
| Input bias current IB+ | IB+ | 10 | 20 | 30 | uA | VSENSE = 0 V | 5 |
| Input bias current IB- | IB- | 10 | 20 | 30 | uA | VSENSE = 0 V | 5 |
| Gain | G | 50 | V/V | INA281x2-Q1 | 5 | ||
| Gain error | GERR | -0.5 | 0.07 | 0.5 | % | GND + 50 mV ≤ VOUT ≤ VS, 200 mV | 5 |
| Gain drift | GERR | -20 | 2 | 20 | ppm/°C | TA = -40 °C to +125 °C | 5 |
| Nonlinearity error | NLERR | 0.01 | % | 5 | |||
| Maximum capacitive load | CLOAD | 500 | pF | No sustained oscillations, no isolation resistor | 5 | ||
| Swing to ground | VOUT | 0.005 | 0.02 | V | RLOAD = 10 kΩ, VSENSE = 0 V, TA = -40 °C to +125 °C | 5 | |
| Bandwidth INA281x2-Q1 | BW | 1300 | kHz | CLOAD = 5 pF, VSENSE = 80 mV | 5 | ||
| Slew rate | SR | 2.5 | V/µs | Rising edge | 5 | ||
| Settling time to 0.5% | ts | 10 | µs | VOUT = 4 V ± 0.1 V step, output settles to 0.5% | 5 | ||
| Settling time to 1% | ts | 5 | µs | VOUT = 4 V ± 0.1 V step, output settles to 1% | 5 | ||
| Settling time to 5% | ts | 1 | µs | VOUT = 4 V ± 0.1 V step, output settles to 5% | 5 | ||
| Voltage noise density | Ven | 50 | nV/√Hz | 5 | |||
| Supply voltage | VS | 2.7 | 20 | V | TA = -40 °C to +125 °C | 5 | |
| Quiescent current | IQ | 1.5 | 2 | mA | 5 | ||
| Quiescent current | IQ | 2.25 | mA | TA = -40 °C to +125 °C | 5 | ||
| Common-mode input range | VCM | -4 | 48 | 110 | V | 4 | |
| Operating supply range | VS | 2.7 | 5 | 20 | V | 4 | |
| Ambient temperature | TA | -40 | 125 | °C | 4 | ||
| Supply voltage | VS | -0.3 | 22 | V | 3 | ||
| Differential input voltage, INA281A5/B5 only | VIN+, VIN- | -6 | 6 | V | INA281A5-Q1, INA281B5-Q1 | 3 | |
| Differential input voltage, all others | VIN+, VIN- | -12 | 12 | V | All others | 3 | |
| Common-mode input voltage | VIN+, VIN- | -20 | 120 | V | Common-mode | 3 | |
| Operating temperature | TA | -55 | 150 | °C | 3 | ||
| Junction temperature | TJ | 150 | °C | 3 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 3 | ||
| Junction-to-ambient thermal resistance | RθJA | 184.7 | °C/W | DBV (SOT-23) 5 pins | 4 | ||
| Junction-to-case (top) thermal resistance | RθJC(top) | 105.6 | °C/W | DBV (SOT-23) 5 pins | 4 | ||
| Junction-to-board thermal resistance | RθJB | 47.2 | °C/W | DBV (SOT-23) 5 pins | 4 | ||
| Junction-to-top characterization parameter | ΨJT | 21.5 | °C/W | DBV (SOT-23) 5 pins | 4 | ||
| Junction-to-board characterization parameter | ΨJB | 46.9 | °C/W | DBV (SOT-23) 5 pins | 4 |
CAD (KiCad official)
- Symbol:
INA281B2QDBVRQ1 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
ina281b2qdbvrq1-etched.step/ina281b2qdbvrq1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ina281b2qdbvrq1.step/ina281b2qdbvrq1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (28 pp, sha256
64d5d08d5a8cfb41, retrieved 2026-10-28, tier: manufacturer) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-haiku-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).