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LR2904D

Public Made by Adom

by adom

LRC Operational Amplifier, SOIC-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 lr2904d: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
viewers lr2904d: viewers · Ray 2mo ago
lr2904d-etched.fit.json lr2904d: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
lr2904d-etched.glb lr2904d: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
lr2904d-etched.step lr2904d: re-etch, flat white mark read from pin 1 (service-occt 1.4.0) + chip hero · Ray 1mo ago
lr2904d.glb Publish 0.1.0 · Ray 2mo ago
lr2904d.kicad_mod Publish 0.1.0 · Ray 2mo ago
lr2904d.kicad_sym Publish 0.1.0 · Ray 2mo ago
lr2904d.lbr Publish 0.1.0 · Ray 2mo ago
lr2904d.step Publish 0.1.0 · Ray 2mo ago
package.json Publish 0.2.0 · Ray 2mo ago
page.json lr2904d: specified limits as data (metadata.characteristics, 23 rows from the datasheet) · Ray 21d ago
README.md lr2904d: specified limits as data (metadata.characteristics, 23 rows from the datasheet) · Ray 21d ago

LR2904D

LRC · Operational Amplifier · SOIC-8

LR2904D from LRC, in a SOIC-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 OUTPUT 1 output Output of op-amp channel 1. Can swing from 0V to approximately Vcc-1.5V. Output short-circuit current typically 40 mA, source current up to 40 mA, sink current up to 13 mA at Vo=2V.
2 INPUT 1- input Inverting input of op-amp channel 1. Input bias current typically 45 nA (max 250 nA), input offset current typically 5 nA. Input common-mode range includes ground (0V) up to Vcc-1.5V.
3 INPUT 1+ input Non-inverting input of op-amp channel 1. Input bias current typically 45 nA. Input common-mode voltage range includes ground; upper limit is Vcc-1.5V.
4 GND power_in Ground / negative supply (Vee). In single-supply operation this is 0V; in split-supply operation this connects to the negative rail. Supply differential (Vcc - Vee) must be 3V to 26V (absolute max 30V).
5 INPUT 2+ input Non-inverting input of op-amp channel 2. Input bias current typically 45 nA. Input common-mode range includes ground up to Vcc-1.5V.
6 INPUT 2- input Inverting input of op-amp channel 2. Input bias current typically 45 nA (max 250 nA), input offset current typically 5 nA.
7 OUTPUT 2 output Output of op-amp channel 2. Can swing from 0V to approximately Vcc-1.5V. Output short-circuit current typically 40 mA. Channel separation from channel 1 is typically 120 dB (f = 1 kHz to 20 kHz).
8 Vcc power_in Positive supply voltage. Operating range Vcc = 3V to 26V single-supply, or ±1.5V to ±13V split-supply. Absolute maximum ±15V single or 30V differential. Typical supply current 0.5 mA at Vcc=5V, 0.8 mA at Vcc=25V (RL=∞). Bypass locally with a decoupling capacitor.

Key specifications

Parameter Value
Manufacturer LRC
Package SOIC-8
Category Op-amp/Cmp
Pins 8

Ordering variants

Same part, different packaging or reel option.

  • LR2904DD

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Operating temperature (LR2904D) Topr -40 125 C 2
Storage temperature Tstg -65 150 C 2
Input voltage Vi -0.3 26 V 2
Differential input voltage Vi(diff) 26 V 2
Supply voltage (operating range) Vcc 3 26 V Features: Vcc=3V26V or dual supply ±1.5V±13V 1
Input offset voltage VIO 2 7 mV VCM=0 to Vcc-1.5, Vo(p)=1.4V, Rs=0 2
Input offset current IIO 5 50 nA 2
Input bias current Ib 45 250 nA 2
Large signal voltage gain GV 25 100 V/mV Vcc=15V, RL=2k, Vo(p)=1V to 11V 2
Output voltage swing V(OH) V(OH) 21 V Vcc=25V, RL=2k 2
Output voltage swing V(OH) V(OH) 22 23 V Vcc=25V, RL=10k 2
Output voltage swing V(OL) V(OL) 5 20 mV Vcc=5V, RL=10k 2
Common-mode rejection ratio CMRR 65 75 dB 2
Power supply rejection ratio PSRR 65 100 dB 2
Output short circuit to GND current Isc 40 60 mA 2
Output source current Isource 20 40 mA VI(+)=1V, VI(-)=0, Vcc=15V, Vo(p)=2V 2
Output sink current Isink 10 13 mA VI(+)=0V, VI(-)=1V, Vcc=15V, Vo(p)=2V 2
Output sink current (low output swing) Isink 12 45 µA VI(+)=0V, VI(-)=1V, Vcc=15V, Vo(p)=200mV 2
Supply current Icc 0.8 2 mA RL=,Vcc=25V 2
Supply current Icc 0.5 1.2 mA Vcc=5V 2
Input common-mode voltage range VICM 0 V Vcc=25V; printed max is Vcc-1.5 (expression, not converted) 2
Channel separation CS 120 dB f=1kHz to 20kHz 2
Slew rate SR 1 V/µs VI(+)=10V, VI(-)=0V, Vcc=±15V, Rl=2K, Cl=100pF 2

CAD (KiCad official)

  • Symbol: LR2904D
  • Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
  • 3D model: SOIC-8 (KiCad packages3D, STEP)
  • 3D model files: lr2904d-etched.step / lr2904d-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); lr2904d.step / lr2904d.glb are the bare package body.

3D model downloads

Two STEP files. Same geometry, different body top:

File Size Use it when
lr2904d.step 122 KB You want the bare part, or you mark your own boards.
lr2904d-etched.step 1.7 MB You want the part with LR2904D already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 414 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: LRC datasheet (7 pp, sha256 6621c1f0759f20e9, 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