component

THS3121CD

Public Made by Adom

by adom

Texas Instruments Operational Amplifier, SOIC-8. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

componentamplifiersths3121cdfactory-2.0.0extractor-text

Verified THS3121CD

by Ray · last 30 Oct 2026 · 1 record · files match
SymbolFootprint3D modelPins

Verification log 1 record

30 Oct 2026RayPublished by the parts factory: tier mfr, 8 pinsfiles match
SymbolFootprint3D modelPinsfor all variants
  • ✓component-page-verify: PASS
  • ✓cad_props: Datasheet, MPN and distributor properties match page.json
  • ✓component: THS3121CD · SOIC-8 · 8 pins
  • ✓copper: 8 copper pads, none touching another net
  • ✓datasheet: all 8 pin names found in the 40-page datasheet
  • ✓distributor: lcsc C1348580, digikey 2156-THS3121CD-ND, mouser 595-THS3121CD
  • ✓family: SOIC-8_3.9x4.9mm_P1.27mm
  • ✓files: 7 declared files present
  • ✓hero: docs/hero.png 4000x2500
  • ✓lbr: OK: /tmp/cpv-_mg49qs7/x.lbr is a valid EAGLE .lbr with complete deviceset
  • ✓license: CC-BY-SA-4.0
  • ✓models_3d: 2 records
  • ✓package_fit: height and body within the datasheet's package drawing (datasheet p.37)
  • ✓pads: 8 pins = 8 pads
  • ✓pose: 2 STEP(s) Z-up, seated, centred
  • ✓symbol: 8 pins agree
  • ✓visibility: public, source open
Evidencedatasheet
Verified files✓ ths3121cd.kicad_sym✓ ths3121cd.kicad_mod✓ ths3121cd.step
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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs ths3121cd: hero re-rendered with the chip (after the 10-30 render outage) · Ray 4d ago
viewers ths3121cd: viewers · Ray 4d ago
package.json Publish 0.1.0 · Ray 4d ago
page.json Set visibility: public · Ray 4d ago
README.md Publish 0.1.0 · Ray 4d ago
ths3121cd-etched.glb Publish 0.1.0 · Ray 4d ago
ths3121cd-etched.step ths3121cd: factory component page (tier=mfr) · Ray 4d ago
ths3121cd-hero.glb ths3121cd: hero GLB from the etched model (keeps the MPN mark) · Ray 4d ago
ths3121cd-hero.overlay.json Publish 0.1.0 · Ray 4d ago
ths3121cd.glb Publish 0.1.0 · Ray 4d ago
ths3121cd.kicad_mod Publish 0.1.0 · Ray 4d ago
ths3121cd.kicad_sym Publish 0.1.0 · Ray 4d ago
ths3121cd.lbr Publish 0.1.0 · Ray 4d ago
ths3121cd.step Publish 0.1.0 · Ray 4d ago
verification.json Verified: Published by the parts factory: tier mfr, 8 pins · Ray 4d ago

THS3121CD

Texas Instruments · Operational Amplifier · SOIC-8

THS3121CD 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 NC unconnected No internal connection on the THS3121 SOIC-8 package.
2 VIN- power_in Inverting input; the differential input voltage is limited to ±4 V.
3 VIN+ power_in Noninverting input; the input voltage is limited to ±VS.
4 VS- power_in Negative power supply; the total supply voltage (VS- to VS+) is limited to 33 V, with ±5 V to ±15 V dual or 10 V to 30 V single supply operation.
5 NC unconnected No internal connection on the THS3121 SOIC-8 package.
6 VOUT output Amplifier output; continuous output current is limited to 550 mA absolute maximum.
7 VS+ power_in Positive power supply; supply range is ±5 V to ±15 V dual or 10 V to 30 V single.
8 NC unconnected No internal connection on the THS3121 SOIC-8 package.

Key specifications

Parameter Value
Manufacturer Texas Instruments
Package SOIC-8
Category Amplifiers
Pins 8

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Recommended maximum slew rate for repetitive signals 900 V/µs VS = ±15 V 4
Transimpedance 1 1.9 MΩ VS = ±15 V; VO = ±3.75 V, Gain = 1 4
Input offset voltage 3 12 mV VS = ±15 V; VCM = 0 V 4
Noninverting input bias current 1 6 µA VS = ±15 V; VCM = 0 V 4
Inverting input bias current 3 20 µA VS = ±15 V; VCM = 0 V 4
Input offset current 4 20 µA VS = ±15 V; VCM = 0 V 4
Input common-mode voltage range (magnitude of ±) 12.2 12.7 V VS = ±15 V 4
Common-mode rejection ratio 60 70 dB VS = ±15 V; VCM = ±12.5 V 4
Output voltage swing (magnitude of ±), RL = 1 kΩ 13 14 V VS = ±15 V; RL = 1 kΩ 4
Output voltage swing (magnitude of ±), RL = 50 Ω 12 13.5 V VS = ±15 V; RL = 50 Ω 4
Output current (sourcing) 400 475 mA VS = ±15 V; RL = 25 Ω 4
Output current (sinking) 400 490 mA VS = ±15 V; RL = 25 Ω 4
Specified operating voltage (magnitude of ±) 15 16 V 5
Maximum quiescent current 7 11 mA VS = ±15 V 5
Minimum quiescent current 4 7 mA VS = ±15 V 5
Power-supply rejection (+PSRR) 60 75 dB VS = ±15 V; VS+ = 15.5 V to 14.5 V, VS- = 15 V 5
Power-supply rejection (-PSRR) 55 69 dB VS = ±15 V; VS+ = 15 V, VS- = -15.5 V to -14.5 V 5
Recommended maximum slew rate for repetitive signals 900 V/µs VS = ±5 V 6
Transimpedance 0.7 1.2 MΩ VS = ±5 V; VO = ±1.25 V, gain = 1 6
Input offset voltage 6 12 mV VS = ±5 V; VCM = 0 V 6
Noninverting input bias current 1 6 µA VS = ±5 V; VCM = 0 V 6
Inverting input bias current 2 20 µA VS = ±5 V; VCM = 0 V 6
Input offset current 2 20 µA VS = ±5 V; VCM = 0 V 6
Input common-mode voltage range (magnitude of ±) 2.3 2.7 V VS = ±5 V 6
Common-mode rejection ratio 58 66 dB VS = ±5 V; VCM = ±2.5 V 6
Output voltage swing (magnitude of ±), RL = 1 kΩ 3.7 4 V VS = ±5 V; RL = 1 kΩ 6
Output voltage swing (magnitude of ±), RL = 50 Ω 3.6 3.9 V VS = ±5 V; RL = 50 Ω 6
Output current (sourcing) 200 310 mA VS = ±5 V; RL = 10 Ω 6
Output current (sinking) 200 325 mA VS = ±5 V; RL = 10 Ω 6
Specified operating voltage (magnitude of ±) 4.5 5 V 7
Maximum quiescent current 6.5 10 mA VS = ±5 V 7
Minimum quiescent current 3.5 6.5 mA VS = ±5 V 7
Power-supply rejection (+PSRR) 57 71 dB VS = ±5 V; VS+ = 5.5 V to 4.5 V, VS- = 5 V 7
Power-supply rejection (-PSRR) 52 66 dB VS = ±5 V; VS+ = 5 V, VS- = -5.5 V to -4.5 V 7
Supply voltage, dual supply (magnitude of ±) 5 15 V 3
Supply voltage, single supply 10 30 V 3
Operating free-air temperature, commercial TA 0 70 °C 3
Operating junction temperature, continuous operating TJ -40 125 °C 3
Normal storage temperature TSTG -40 85 °C 3
Supply voltage, VS- to VS+ VS- to VS+ 33 V 3
Differential input voltage VID -4 4 V 3
Output current IO 550 mA 3
Maximum junction temperature TJ 150 °C Absolute maximum (footnote 3) 3
Maximum junction temperature, continuous operation TJ 125 °C Continuous operation, long-term reliability (footnote 4) 3
Operating free-air temperature, commercial TA 0 70 °C 3
Storage temperature TSTG -65 125 °C 3
ESD rating, HBM 1000 not printed HBM 3
ESD rating, CDM 1500 not printed CDM 3
ESD rating, MM 200 not printed MM 3
Junction-to-case thermal resistance, D-8 (SOIC) θJC 38.3 °C/W D-8 package 2
Junction-to-ambient thermal resistance, D-8 (SOIC) θJA 95 °C/W D-8 package, JEDEC low-K test PCB (JEDEC high-K also 95 °C/W) 2
Power rating, D-8 (SOIC) 1.05 W TJ = +125°C, TA = +25°C 2
Power rating, D-8 (SOIC) 421 mW TJ = +125°C, TA = +85°C 2

CAD (KiCad official)

  • Symbol: THS3121CD
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: ths3121cd-etched.step / ths3121cd-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ths3121cd.step / ths3121cd.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Texas Instruments datasheet (40 pp, sha256 d0c0ef88b264e6b3, retrieved 2026-10-30, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-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).

Datasheet PDF