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THS4121CD
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
markdownTHS4121CD
Texas Instruments · Differential Amplifiers · SOIC-8
THS4121CD 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 | VIN− | power_in | Inverting input of the THS4121 fully differential amplifier; input voltage is limited to ±VDD per the absolute maximum ratings. |
| 2 | VOCM | input | Output common-mode voltage input that sets VOC; for proper operation, VOCM symmetry must be maintained by using matched feedback and gain resistors (Rf1 = Rf2, Rg1 = Rg2). |
| 3 | VDD | power_in | Positive supply pin; the absolute maximum supply voltage from GND to VDD is 3.6 V, and the datasheet example uses VDD = 3.3 V. |
| 4 | VOUT+ | output | Non-inverting differential output; for capacitive loads above 10 pF, a series output resistor of at least 20 Ω is recommended, and output sink current is limited to 110 mA. |
| 5 | VOUT− | output | Inverting differential output; for capacitive loads above 10 pF, a series output resistor of at least 20 Ω is recommended. |
| 6 | GND | power_in | Ground reference pin for the amplifier; supply ratings are specified from GND to VDD. |
| 7 | NC | unconnected | No internal connection on the THS4121; on the THS4120 this same position is the PD power-down pin, which requires an external 10-kΩ pullup to the positive supply. |
| 8 | VIN+ | power_in | Non-inverting input of the THS4121 fully differential amplifier; input voltage is limited to ±VDD per the absolute maximum ratings. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Amplifiers/Comparators |
| Pins | 8 |
CAD (KiCad official)
- Symbol:
THS4121CD - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files:
ths4121cd-etched.step/ths4121cd-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);ths4121cd.step/ths4121cd.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Texas Instruments datasheet (37 pp, sha256
705c359dabda7e27, retrieved 2026-10-11, 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).