component

LM4890S

Public Made by Adom

by adom

IDCHIP Audio Power OpAmps, MSOP-8. Pinout extracted from the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
Name Last commit message Last updated
docs lm4890s: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
viewers pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
lm4890s-etched.fit.json lm4890s: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm4890s-etched.glb lm4890s: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm4890s-etched.step lm4890s: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray
lm4890s.glb Publish 0.1.0 · Ray
lm4890s.kicad_mod Publish 0.1.0 · Ray
lm4890s.kicad_sym Publish 0.1.0 · Ray
lm4890s.lbr rebuild the library on adom-lbr 2.32.0. The published copy was built by 2.18.0, which imported every KiCad roundrect an… · Ray
lm4890s.step Publish 0.1.0 · Ray
package.json Publish 0.2.0 · Ray
pads.json pin 1: carry the footprint's marker into the .lbr, the viewer and page.json (silk-marker, drawn, top-left) · Ray
page.json lm4890s: component.models_3d pose record per STEP (Z-up, seated z=0, pad-centre origin, identity binding) · Ray
README.md lm4890s: laser-etched CAD + chip hero (factory 2.0.0 backfill) · Ray

LM4890S

IDCHIP · Audio Power OpAmps · MSOP-8

LM4890S from IDCHIP, in a MSOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 SHUTDOWN input Active-low shutdown control. Drive high (VIH ≥ 1.2V) for normal operation; drive low (VIL ≤ 0.4V) to place the amplifier into low-power shutdown mode (ISD ≈ 0.1µA typ).
2 BYPASS passive Internal common-mode (half-supply) bias bypass node. Connect a bypass capacitor (typically 1µF) from this pin to GND to filter the internal mid-rail reference and improve PSRR / pop suppression.
3 +IN input Non-inverting analog audio input of the internal amplifier A1. Typically AC-referenced to the BYPASS mid-rail in the standard application.
4 -IN input Inverting analog audio input. Sets the closed-loop gain via external RIN (typ 20kΩ) and Rf (typ 68kΩ); combines with CIN to form the input high-pass filter fC = 1/(2π·RIN·CIN).
5 VO1 output BTL speaker output (negative/inverting side of the bridge, VOUT-). Connect one terminal of the 8Ω speaker load between VO1 (pin 5) and VO2 (pin 8). No output coupling capacitor required.
6 VDD power_in Positive supply input, 2.2V to 5.5V operating range (5.5V absolute max). Decouple locally with CS (typ 1µF) to GND.
7 GND power_in Ground / supply return. All voltages in the datasheet are referenced to this pin.
8 VO2 output BTL speaker output (positive/non-inverting side of the bridge, VOUT+). Connect the other terminal of the 8Ω speaker load here. No output coupling capacitor required.

Key specifications

Parameter Value
Manufacturer IDCHIP
Package MSOP-8
Category Op-amp/Cmp
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • LM4890SS

CAD (KiCad official)

  • Symbol: LM4890S
  • Footprint: Package_SO:MSOP-8_3x3mm_P0.65mm
  • 3D model: MSOP-8 (KiCad packages3D, STEP)
  • 3D model files: lm4890s-etched.step / lm4890s-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lm4890s.step / lm4890s.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lm4890s.step 123 KB You want the bare part, or you mark your own boards.
lm4890s-etched.step 1.8 MB You want the part with LM4890S already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 444 faces against 147 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

  • Datasheet: IDCHIP datasheet (8 pp, sha256 a83b352f78b378f3, retrieved 2026-08-17, tier: lcsc)
  • Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF