component
INA281A3QDBVRQ1
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.
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INA281A3QDBVRQ1
Texas Instruments · Current-Sensing Amplifiers · SOT-23-5
INA281A3QDBVRQ1 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 of the current-sense amplifier, which must stay between GND - 0.3 V and VS + 0.3 V per the absolute maximum ratings. |
| 2 | GND | power_in | Ground reference pin for the device. |
| 3 | IN+ | input | Shunt resistor positive sense input, with a common-mode input range of -4 V to 110 V and a differential input limit of -12 V to 12 V for this variant. |
| 4 | IN- | input | Shunt resistor negative sense input, with a common-mode input range of -4 V to 110 V and a differential input limit of -12 V to 12 V for this variant. |
| 5 | VS | power_in | Power supply pin, with an operating supply range of 2.7 V to 20 V (5 V nominal). |
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 |
|---|---|---|---|---|---|---|---|
| Supply voltage | VS | -0.3 | 22 | V | 3 | ||
| Differential input voltage (INA281A3 and others) | VIN+, VIN- | -12 | 12 | V | All others (not A5) | 3 | |
| Common-mode input voltage | VIN+, VIN- | -20 | 120 | V | 3 | ||
| Operating temperature | TA | -55 | 150 | °C | 3 | ||
| Storage temperature | Tstg | -65 | 150 | °C | 3 | ||
| Junction temperature | TJ | 150 | °C | 3 | |||
| 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 | ||
| Human body model ESD | V(ESD) | -2000 | 2000 | V | Human body model (HBM), per AEC Q100-002, all pins | 4 | |
| Charged device model ESD | V(ESD) | -1000 | 1000 | V | Charged device model (CDM), per AEC Q100-011, all pins | 4 | |
| 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 (INA281x3-Q1) | Vos | -250 | 30 | 250 | µV | 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 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 |
| Swing to ground | VOUT | 0.005 | 0.02 | V | RLOAD = 10 kΩ, VSENSE = 0 V, TA = -40 °C to +125 °C | 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 rejection ratio, AC | CMRR | 65 | dB | f = 50 kHz | 4 | ||
| Gain | G | 100 | V/V | INA281x3-Q1 | 5 | ||
| Slew rate | SR | 2.5 | V/µs | Rising edge | 5 | ||
| Thermal resistance, junction-to-ambient | RθJA | 184.7 | °C/W | DBV (SOT-23), 5 pins | 4 | ||
| Thermal resistance, junction-to-board | RθJB | 47.2 | °C/W | DBV (SOT-23), 5 pins | 4 | ||
| Thermal resistance, junction-to-case (top) | RθJC(top) | 105.6 | °C/W | DBV (SOT-23), 5 pins | 4 |
CAD (KiCad official)
- Symbol:
INA281A3QDBVRQ1 - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
ina281a3qdbvrq1-etched.step/ina281a3qdbvrq1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ina281a3qdbvrq1.step/ina281a3qdbvrq1.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).
# INA281A3QDBVRQ1
**Texas Instruments** · Current-Sensing Amplifiers · SOT-23-5
INA281A3QDBVRQ1 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 of the current-sense amplifier, which must stay between GND - 0.3 V and VS + 0.3 V per the absolute maximum ratings. |
| 2 | GND | power_in | Ground reference pin for the device. |
| 3 | IN+ | input | Shunt resistor positive sense input, with a common-mode input range of -4 V to 110 V and a differential input limit of -12 V to 12 V for this variant. |
| 4 | IN- | input | Shunt resistor negative sense input, with a common-mode input range of -4 V to 110 V and a differential input limit of -12 V to 12 V for this variant. |
| 5 | VS | power_in | Power supply pin, with an operating supply range of 2.7 V to 20 V (5 V nominal). |
## 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 |
|---|---|---|---|---|---|---|---|
| Supply voltage | VS | -0.3 | | 22 | V | | 3 |
| Differential input voltage (INA281A3 and others) | VIN+, VIN- | -12 | | 12 | V | All others (not A5) | 3 |
| Common-mode input voltage | VIN+, VIN- | -20 | | 120 | V | | 3 |
| Operating temperature | TA | -55 | | 150 | °C | | 3 |
| Storage temperature | Tstg | -65 | | 150 | °C | | 3 |
| Junction temperature | TJ | | | 150 | °C | | 3 |
| 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 |
| Human body model ESD | V(ESD) | -2000 | | 2000 | V | Human body model (HBM), per AEC Q100-002, all pins | 4 |
| Charged device model ESD | V(ESD) | -1000 | | 1000 | V | Charged device model (CDM), per AEC Q100-011, all pins | 4 |
| 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 (INA281x3-Q1) | Vos | -250 | 30 | 250 | µV | | 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 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 |
| Swing to ground | VOUT | | 0.005 | 0.02 | V | RLOAD = 10 kΩ, VSENSE = 0 V, TA = -40 °C to +125 °C | 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 rejection ratio, AC | CMRR | | 65 | | dB | f = 50 kHz | 4 |
| Gain | G | | 100 | | V/V | INA281x3-Q1 | 5 |
| Slew rate | SR | | 2.5 | | V/µs | Rising edge | 5 |
| Thermal resistance, junction-to-ambient | RθJA | | 184.7 | | °C/W | DBV (SOT-23), 5 pins | 4 |
| Thermal resistance, junction-to-board | RθJB | | 47.2 | | °C/W | DBV (SOT-23), 5 pins | 4 |
| Thermal resistance, junction-to-case (top) | RθJC(top) | | 105.6 | | °C/W | DBV (SOT-23), 5 pins | 4 |
## CAD (KiCad official)
- Symbol: `INA281A3QDBVRQ1`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `ina281a3qdbvrq1-etched.step` / `ina281a3qdbvrq1-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ina281a3qdbvrq1.step` / `ina281a3qdbvrq1.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/ina281-q1.pdf) (28 pp, sha256 `64d5d08d5a8cfb41`, retrieved 2026-10-28, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-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).
[Datasheet PDF](docs/ina281a3qdbvrq1-datasheet.pdf)