OPA1678IDR from Texas Instruments, in a SOIC-8-150mil. 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	OUT A	output	Output, channel A. Rail-to-rail output stage capable of swinging to within 800 mV of the supply rails with a 2-kΩ load. Short-circuit current typ ±50 mA.
2	-IN A	input	Inverting input, channel A. High-impedance FET-input (100 MΩ
3	+IN A	input	Noninverting input, channel A. High-impedance FET-input; input bias current typ ±10 pA. Common-mode range (V-)+0.5 V to (V+)-2 V; CMRR 110 dB typ.
4	V-	power_in	Negative (lowest) power supply. For dual-supply operation typically -2.25 V to -18 V; for single-supply operation tie to ground. Total supply (V+)-(V-) 4.5 V to 36 V (40 V abs max).
5	+IN B	input	Noninverting input, channel B. High-impedance FET-input; input bias current typ ±10 pA. Common-mode range (V-)+0.5 V to (V+)-2 V.
6	-IN B	input	Inverting input, channel B. High-impedance FET-input; input bias current typ ±10 pA. Common-mode range (V-)+0.5 V to (V+)-2 V.
7	OUT B	output	Output, channel B. Rail-to-rail output stage; short-circuit current typ ±50 mA. Slew rate 9 V/µs.
8	V+	power_in	Positive (highest) power supply. Supply range 4.5 V to 36 V single-supply, or ±2.25 V to ±18 V split. Quiescent current 2 mA per channel typical.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOIC-8-150mil
Category	Op-amp/Cmp
Pins	8

Ordering variants

Same part, different packaging or reel option.

OPA1678IDR
OPA1678IDRIDGKR
OPA1678IDRIDGK
OPA1678IDRGR
OPA1678IDRGT

CAD (KiCad official)

Symbol: OPA1678IDR
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8-150mil (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`opa1678idr.step`	122 KB	You want the bare part, or you mark your own boards.
`opa1678idr-etched.step`	2.0 MB	You want the part with `OPA1678IDR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 503 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: Texas Instruments datasheet (56 pp, sha256 4072daad4ebc4ec9, 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