component
INA155UA
Public Made by Adomby adom
Texas Instruments Instrumentation Amplifiers, SOIC-8. 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
markdownINA155UA
Texas Instruments · Instrumentation Amplifiers · SOIC-8
INA155UA from Texas Instruments, in a SOIC-8. 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 | RG | passive | Gain-setting pin; left open with pin 8 sets G=10, tied to pin 8 sets G=50, or an external resistor between pins 1 and 8 sets gain per G = 10 + 400kΩ/(10kΩ + RG). |
| 2 | VIN- | power_in | Inverting instrumentation-amplifier input; safe input voltage range is (V-) - 0.5V to (V+) + 0.5V with input current limited to 10mA. |
| 3 | VIN+ | power_in | Noninverting instrumentation-amplifier input; safe input voltage range is (V-) - 0.5V to (V+) + 0.5V with input current limited to 10mA. |
| 4 | V- | power_in | Negative power supply pin; supply voltage V+ to V- must not exceed 7.5V absolute maximum, ground reference in single-supply operation. |
| 5 | Ref | input | Output reference terminal, normally set to VS/2 through a low-impedance connection; sets the output offset level and directly affects common-mode rejection (a 200Ω series impedance degrades CMRR to about 80dB). |
| 6 | VOUT | output | Rail-to-rail amplifier output; swings to within 5mV (typ) / 10mV (max) of either supply rail into a 10kΩ load, with ±50mA short-circuit current to ground. |
| 7 | V+ | power_in | Positive power supply pin; specified operating range is +2.7V to +5.5V (operating range +2.5V to +6V), quiescent current 1.7mA typ/2.1mA max. |
| 8 | RG | passive | Gain-setting pin; left open with pin 1 sets G=10, tied to pin 1 sets G=50, or an external resistor between pins 1 and 8 sets gain per G = 10 + 400kΩ/(10kΩ + RG). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
INA155UA - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
ina155ua-etched.step/ina155ua-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ina155ua.step/ina155ua.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (17 pp, sha256
477f3b4451cfbf8f, retrieved 2026-09-24, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.2, primaryclaude-haiku-4-5-20251001(text), consensusclaude-sonnet-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).