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INA155E
Public Made by Adomby adom
Texas Instruments Instrumentation Amplifiers, VSSOP-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
markdownINA155E
Texas Instruments · Instrumentation Amplifiers · VSSOP-8
INA155E from Texas Instruments, in a VSSOP-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: leave open for G = 10, connect directly to pin 8 for G = 50, or place a resistor between pins 1 and 8 for 10 < G < 50, keeping the pin 1 to pin 8 connection low impedance (20Ω can cause a 0.2% gain error shift). |
| 2 | VIN- | power_in | Inverting signal input, with a safe input voltage of (V-) - 0.5V to (V+) + 0.5V and an input bias current return path required; inputs beyond the supply rails by more than 500mV should be limited to 10mA. |
| 3 | VIN+ | power_in | Non-inverting signal input, with common-mode range of 0.3V to 5.2V at VS = 5.5V and 0.2V to 2.5V at VS = 2.7V, and an input bias current return path required. |
| 4 | V- | power_in | Negative power supply terminal (ground in single-supply operation), with the device specified for a total supply of +2.7V to +5.5V. |
| 5 | Ref | input | Output reference terminal normally set to VS/2 that must be driven low impedance for good CMRR, since 200Ω in series with Ref degrades a typical device to about 80dB CMRR. |
| 6 | VOUT | output | Output referred to the Ref terminal, swinging to within 10mV of either rail with RL = 10kΩ and rated for ±50mA short-circuit current to ground. |
| 7 | V+ | power_in | Positive power supply terminal, specified for +2.7V to +5.5V with quiescent current of 1.7mA typical and 2.1mA maximum at 25°C. |
| 8 | RG | passive | Second gain-setting pin, used with pin 1 exactly as described for pin 1: open for G = 10, shorted to pin 1 for G = 50, or joined by a resistor for intermediate gains. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | VSSOP-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
INA155E - Footprint:
Package_SO:VSSOP-8_2.3x2mm_P0.5mm - 3D model: VSSOP-8 (KiCad packages3D, STEP)
- 3D model files:
ina155e-etched.step/ina155e-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ina155e.step/ina155e.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 2026-10-08, tier: lcsc) - 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).