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INA281A4IDBVT
Public Made by Adomby adom
Texas Instruments Current Sense 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
markdownINA281A4IDBVT
Texas Instruments · Current Sense Amplifiers · SOT-23-5
INA281A4IDBVT 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; with zero shunt current the output sits no higher than GND + 20mV, and the output swing is bounded by the supply pin voltage. |
| 2 | GND | power_in | Ground reference pin for the device. |
| 3 | IN+ | input | Positive shunt-resistor sense input; common-mode voltage must stay within -4V to 110V (absolute maximum common mode -20V to 120V). |
| 4 | IN- | input | Negative shunt-resistor sense input; common-mode voltage must stay within -4V to 110V (absolute maximum common mode -20V to 120V). |
| 5 | Vs | power_in | Power supply pin, operating range 2.7V to 20V (absolute maximum -0.3V to 22V). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-5 |
| Category | Amplifiers/Comparators |
| 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 voltage range | VCM | -4 | 110 | V | TA = -40°C to +125°C | 4 | |
| Common-mode rejection ratio, input-referred | CMRR | 120 | 140 | dB | -4V ≤ VCM ≤ 110V, TA = -40°C to +125°C | 4 | |
| Input-referred offset voltage | Vos | -200 | 30 | 200 | µV | INA281x4 | 4 |
| Offset voltage drift | dVos/dT | -1 | 0.1 | 1 | µV/°C | TA = -40°C to +125°C | 4 |
| Power supply rejection ratio, input-referred | PSRR | -10 | 1.5 | 10 | µV/V | 2.7V ≤ VS ≤ 20V, TA = -40°C to +125°C | 4 |
| Input bias current IB+ | IB+ | 10 | 20 | 30 | uA | VSENSE = 0V | 4 |
| Input bias current IB- | IB- | 10 | 20 | 30 | uA | VSENSE = 0V | 4 |
| Gain error | GERR | -0.5 | 0.07 | 0.5 | % | GND + 50mV ≤ VOUT ≤ VS – 200mV | 5 |
| Gain error drift | GERR | -20 | 2 | 20 | ppm/°C | TA = -40°C to +125°C | 5 |
| Maximum capacitive load | CLOAD | 500 | pF | No sustained oscillation, no isolation resistor | 5 | ||
| Output swing to GND | 0.005 | 0.02 | V | RLOAD = 10kΩ, VSENSE = 0V, TA = -40°C to +125°C | 5 | ||
| Gain | G | 200 | V/V | INA281x4 | 4 | ||
| Nonlinearity error | NLERR | 0.01 | % | 5 | |||
| Bandwidth | BW | 900 | kHz | INA281x4, CLOAD = 5pF, VSENSE = 20mV | 5 | ||
| Slew rate | SR | 2.5 | V/µs | Rising edge | 5 | ||
| Settling time to 0.5% | 10 | µs | VOUT = 4V ± 0.1V step, output settles to 0.5% | 5 | |||
| Settling time to 1% | 5 | µs | VOUT = 4V ± 0.1V step, output settles to 1% | 5 | |||
| Settling time to 5% | 1 | µs | VOUT = 4V ± 0.1V 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 over temperature | IQ | 2.25 | mA | TA = -40°C to +125°C | 5 | ||
| Supply voltage | VS | -0.3 | 22 | V | 3 | ||
| Differential input voltage (VIN+) – (VIN–) | VIN | -12 | 12 | V | All variants except INA281A5/B5 | 3 | |
| Common-mode analog input voltage | VIN | -20 | 120 | V | 3 | ||
| Operating ambient temperature (absolute maximum) | TA | -55 | 150 | °C | Natural ventilation | 3 | |
| Junction temperature | TJ | 150 | °C | 3 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 3 | ||
| ESD human body model (HBM) | V(ESD) | -2000 | 2000 | V | ANSI/ESDA/JEDEC JS-001, all pins | 3 | |
| ESD charged device model (CDM) | V(ESD) | -1000 | 1000 | V | JEDEC JESD22-C101, all pins | 3 | |
| Common-mode input voltage range | VCM | -4 | 48 | 110 | V | 4 | |
| Ambient temperature | TA | -40 | 125 | °C | 4 | ||
| Junction-to-ambient thermal resistance | RθJA | 184.7 | °C/W | 4 | |||
| Junction-to-case (top) thermal resistance | RθJC(top) | 105.6 | °C/W | 4 | |||
| Junction-to-board thermal resistance | RθJB | 47.2 | °C/W | 4 | |||
| Junction-to-top characterization parameter | ΨJT | 21.5 | °C/W | 4 | |||
| Junction-to-board characterization parameter | ΨJB | 46.9 | °C/W | 4 |
CAD (KiCad official)
- Symbol:
INA281A4IDBVT - Footprint:
Package_TO_SOT_SMD:SOT-23-5 - 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files:
ina281a4idbvt-etched.step/ina281a4idbvt-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ina281a4idbvt.step/ina281a4idbvt.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (30 pp, sha256
b5bbdc809184263b, retrieved 2026-10-10, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- 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).