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INA143U
Public Made by Adomby adom
Texas Instruments Differential 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
markdownINA143U
Texas Instruments · Differential Amplifiers · SOIC-8
INA143U 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 | Ref | input | Output reference terminal, normally grounded; a voltage applied here is summed with the output to null offset, and its source impedance should be less than 10Ω to maintain good common-mode rejection. |
| 2 | -In | input | Inverting differential input; source impedances on the two inputs must be nearly equal, since a 5Ω mismatch degrades typical CMR to about 86 dB, and input resistors above 100Ω degrade CMR even if matched. |
| 3 | +In | input | Non-inverting differential input; source impedances must be nearly equal to the -In source for good common-mode rejection, and the common-mode input range extends beyond the supply rails. |
| 4 | V- | power_in | Negative supply: operates from dual supplies of ±2.25V to ±18V or single supply of +4.5V to +36V (absolute maximum supply V+ to V- is 36V). |
| 5 | Sense | input | Sense terminal of the internal difference amplifier (shown in the block diagram); the text does not define its function or limits. |
| 6 | Output | output | Amplifier output; with RL = 10kΩ to ground it swings to (V+) -1.5V positive and (V-) +1V negative, with continuous short-circuit current limit of -25/+32 mA and stable operation up to 1000 pF capacitive load. |
| 7 | V+ | power_in | Positive supply: operates from ±2.25V to ±18V dual or +4.5V to +36V single supply. |
| 8 | NC | unconnected | No connection; leave unconnected. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
INA143U - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
ina143u-etched.step/ina143u-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ina143u.step/ina143u.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (22 pp, sha256
8976aa5a4a2130c8, 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).