CSA240LCSOIC8 from analogysemi, 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	IN-	input	Inverting analog input. Connect to the load side of the external shunt (sense) resistor. Common-mode range −6 V to 80 V; differential (V_IN+ − V_IN−) up to ±80 V for 1 s.
2	GND	power_in	Device ground reference.
3	REF2	input	Reference 2 analog input. Connect between 0 V and VS. Together with REF1 sets the output-reference (zero-current) voltage via internal 50 kΩ dividers, enabling bidirectional current sensing.
4	NC	unconnected	Reserved. Connect to ground or leave floating.
5	OUT	output	Analog output voltage. V_OUT = Gain × (V_IN+ − V_IN−) + V_REF, where Gain = 20 V/V for CSA240L. Swings from V_GND+1 mV up to VS−15 mV with a 10 kΩ load; drives up to 2 nF without sustained oscillation.
6	VS	power_in	Positive power supply, 2.7 V to 5.5 V (absolute max 6 V). Typical quiescent current 1.4 mA.
7	REF1	input	Reference 1 analog input. Connect between 0 V and VS. Together with REF2 sets the output-reference (zero-current) voltage via internal 50 kΩ dividers.
8	IN+	input	Non-inverting analog input. Connect to the supply side of the external shunt (sense) resistor. Common-mode range −6 V to 80 V.

Key specifications

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

Ordering variants

Same part, different packaging or reel option.

CSA240LCSOIC8
CSA240MCSOIC8
CSA240NCSOIC8
CSA240LCMSOP8
CSA240MCMSOP8
CSA240NCMSOP8
CSA240LCTSSOP8
CSA240MCTSSOP8
CSA240NCTSSOP8

CAD (KiCad official)

Symbol: CSA240LCSOIC8
Footprint: Package_SO:SOIC-8_3.9x4.9mm_P1.27mm
3D model: SOIC-8 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`csa240lcsoic8.step`	122 KB	You want the bare part, or you mark your own boards.
`csa240lcsoic8-etched.step`	2.8 MB	You want the part with `CSA240LCSOIC8` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 671 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: analogysemi datasheet (24 pp, sha256 520b4237ad8a16cf, retrieved 2026-08-17, tier: lcsc)
Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
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