# LF411CDR

**Texas Instruments** · Operational Amplifier · SOIC-8

LF411CDR from Texas Instruments, 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 | BAL1 | input | Offset null / balance pin 1. Connect a potentiometer (typ. 10 kΩ) between BAL1 and BAL2 with the wiper tied to VCC- to trim input offset voltage to zero. |
| 2 | IN- | input | Inverting input of the op-amp. High-impedance JFET input (~10^12 Ω), input bias current 50 pA typ. |
| 3 | IN+ | input | Non-inverting input of the op-amp. High-impedance JFET input (~10^12 Ω), input bias current 50 pA typ. |
| 4 | VCC- | power_in | Negative supply rail. Recommended operating range -3.5 V to -18 V; absolute maximum -18 V. In single-supply operation connect to GND. |
| 5 | BAL2 | input | Offset null / balance pin 2. Used with BAL1 and a trim potentiometer (wiper to VCC-) to null input offset voltage. |
| 6 | OUT | output | Op-amp output. Peak output-voltage swing ±13.5 V typ at RL=10 kΩ with ±15 V supplies; short-circuit protected (unlimited duration). |
| 7 | VCC+ | power_in | Positive supply rail. Recommended operating range 3.5 V to 18 V; absolute maximum 18 V. |
| 8 | NC | unconnected | No internal connection. Leave floating or tie to any convenient potential. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Package | SOIC-8 |
| Category | Op-amp/Cmp |
| Pins | 8 |

## Ordering variants

Same part, different packaging or reel option.

- `LF411CDR`
- `LF411CDG4`
- `LF411CDRG4`
- `LF411ID`
- `LF411CP`
- `LF411CPE4`
- `LF411IP`

## CAD (KiCad official)

- Symbol: `LF411CDR`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOIC-8 (KiCad packages3D, STEP)
- 3D model files: `lf411cdr-etched.step` / `lf411cdr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lf411cdr.step` / `lf411cdr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/lf411c.pdf) (11 pp, sha256 `1e51951a18976c2b`, retrieved 2026-08-17, tier: manufacturer)
- **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](docs/lf411cdr-datasheet.pdf)