component
INA181A3IDBVR
Public Made by Adomby adom
Texas Instruments Current-Sensing Amplifiers, SOT-23-6. Pinout extracted from 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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Contents
README
markdownINA181A3IDBVR
Texas Instruments · Current-Sensing Amplifiers · SOT-23-6
INA181A3IDBVR from Texas Instruments, in a SOT-23-6. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | OUT | output | Analog output voltage. Amplified voltage proportional to the sensed current (V_OUT = Gain x V_SENSE + V_REF). Rail-to-rail output; A3 gain option is 100 V/V. |
| 2 | GND | power_in | Device ground reference (0 V). |
| 3 | IN+ | input | Current-sense amplifier positive input. For high-side applications, connect to the bus-voltage side of the sense resistor. For low-side applications, connect to the load side of the sense resistor. Common-mode range -0.2 V to +26 V. |
| 4 | IN- | input | Current-sense amplifier negative input. For high-side applications, connect to the load side of the sense resistor. For low-side applications, connect to the ground side of the sense resistor. Common-mode range -0.2 V to +26 V. |
| 5 | REF | input | Reference input. Sets the output voltage when the sensed differential input voltage is zero (allows bidirectional current sensing when biased between GND and VS). |
| 6 | VS | power_in | Power supply, 2.7 V to 5.5 V. Bypass to GND with a 0.1 uF ceramic capacitor. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOT-23-6 |
| Category | Op-amp/Cmp |
| Pins | 6 |
Ordering variants
Same part, different packaging or reel option.
INA181A3IDBVRINA181A3IDBVTINA181A3IDBVRIDGSRINA181A3IDBVRIDGSTINA181A3IDBVRIPWRINA181A3IDBVRIPWT
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 rejection ratio, RTI | CMRR | 84 | 100 | dB | VIN+ = 0 V to 26 V, VSENSE = 0 mV, TA = –40°C to +125°C | 8 | |
| Offset voltage, RTI | VOS | -500 | 100 | 500 | μV | VSENSE = 0 mV | 8 |
| Offset voltage, RTI | VOS | -150 | 25 | 150 | μV | VSENSE = 0 mV, VIN+ = 0 V | 8 |
| Offset drift, RTI | dVOS/dT | 0.2 | 1 | μV/°C | VSENSE = 0 mV, TA = –40°C to +125°C | 8 | |
| Power-supply rejection ratio, RTI | PSRR | -40 | 8 | 40 | μV/V | VS = 2.7 V to 5.5 V, VIN+ = 12 V, VSENSE = 0 mV | 8 |
| Input offset current | IIO | -0.05 | 0.05 | μA | VSENSE = 0 mV | 8 | |
| Gain error | EG | -1 | 0.1 | 1 | % | VOUT = 0.5 V to VS – 0.5 V, TA = –40°C to +125°C | 8 |
| Gain error vs temperature | 1.5 | 20 | ppm/°C | TA = –40°C to +125°C | 8 | ||
| Nonlinearity error | -0.01 | 0.01 | % | VOUT = 0.5 V to VS – 0.5 V | 8 | ||
| Maximum capacitive load | 1 | nF | No sustained oscillation | 8 | |||
| Swing to VS power-supply rail (magnitude below VS) | VSP | 0.02 | 0.03 | V | RL = 10 kΩ to GND, TA = –40°C to +125°C; printed as (VS) – value | 8 | |
| Swing to GND (magnitude above GND) | VSN | 0.0005 | 0.005 | V | RL = 10 kΩ to GND, TA = –40°C to +125°C; printed as (VGND) + value | 8 | |
| Quiescent current (INA181) | IQ | 195 | 260 | μA | VSENSE = 0 mV | 8 | |
| Quiescent current (INA181) | IQ | 300 | μA | VSENSE = 0 mV, TA = –40°C to +125°C | 8 | ||
| Common-mode input voltage (IN+ and IN–) | VCM | -0.2 | 12 | 26 | V | 7 | |
| Operating supply voltage | VS | 2.7 | 5 | 5.5 | V | 7 | |
| Operating free-air temperature | TA | -40 | 125 | °C | 7 | ||
| Supply voltage | VS | 6 | V | 7 | |||
| Differential input voltage (VIN+) – (VIN–) | VIN+ – VIN– | -26 | 26 | V | Differential | 7 | |
| Common-mode input voltage, IN+ and IN– | VIN | -0.3 | 26 | V | Minimum printed as GND – 0.3 V | 7 | |
| Input voltage range at REF pin | VREF | -0.3 | 0.3 | V | Minimum printed as GND – 0.3 V; maximum printed as VS + 0.3 V (max shown as magnitude above VS) | 7 | |
| Output voltage | VOUT | -0.3 | 0.3 | V | Minimum printed as GND – 0.3 V; maximum printed as VS + 0.3 V (max shown as magnitude above VS) | 7 | |
| Maximum output current | IOUT | 8 | mA | 7 | |||
| Operating free-air temperature | TA | -55 | 150 | °C | 7 | ||
| Junction temperature | TJ | 150 | °C | 7 | |||
| Storage temperature | Tstg | -65 | 150 | °C | 7 | ||
| Junction-to-ambient thermal resistance (DBV SOT-23) | RθJA | 198.7 | °C/W | DBV (SOT-23), 6 pins | 7 | ||
| Junction-to-case (top) thermal resistance (DBV SOT-23) | RθJC(top) | 120.9 | °C/W | DBV (SOT-23), 6 pins | 7 | ||
| Junction-to-board thermal resistance (DBV SOT-23) | RθJB | 52.3 | °C/W | DBV (SOT-23), 6 pins | 7 | ||
| Junction-to-top characterization parameter (DBV SOT-23) | ψJT | 30.3 | °C/W | DBV (SOT-23), 6 pins | 7 | ||
| Junction-to-board characterization parameter (DBV SOT-23) | ψJB | 52 | °C/W | DBV (SOT-23), 6 pins | 7 | ||
| Gain (A3 devices) | G | 100 | V/V | A3 devices | 8 |
CAD (KiCad official)
- Symbol:
INA181A3IDBVR - Footprint:
Package_TO_SOT_SMD:SOT-23-6 - 3D model: SOT-23-6 (KiCad packages3D, STEP)
- 3D model files:
ina181a3idbvr-etched.step/ina181a3idbvr-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ina181a3idbvr.step/ina181a3idbvr.glbare the bare package body.
3D model downloads
Two STEP files. Same geometry, different body top:
| File | Size | Use it when |
|---|---|---|
ina181a3idbvr.step |
97 KB | You want the bare part, or you mark your own boards. |
ina181a3idbvr-etched.step |
2.1 MB | You want the part with INA181A3IDBVR already on it. |
The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 547 faces against 117 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (58 pp, sha256
f6bd362733887a4d, retrieved 2026-08-17, tier: manufacturer) - 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:
ds2sf(Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate. - CAD: KiCad official libraries (CC-BY-SA 4.0).