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zxct1109sa-7

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by Ray

Diodes Incorporated Current-Sensing Amplifiers, SOT-23. Datasheet-verified pinout, KiCad symbol/footprint/3D.

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ZXCT1109SA-7

Diodes Incorporated · Current-Sensing Amplifiers · SOT-23

ZXCT1109SA-7 from Diodes Incorporated, in a SOT-23. 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 output Current output pin. Sources a current proportional to VSENSE (IOUT = 4mA/V × VSENSE, typ). Also serves as the substrate/ground return for the ZXCT1109, so the minimum rail voltage that can be used is 2.5V + VOUT. An external RGAIN from OUT to GND converts the output current into a voltage.
2 S+ power_in Positive input of the current monitor and analog supply pin. Wide common-mode input range 2.5V to 36V; provides power to the internal circuitry (line-powered). Current through this pin varies with the differential sense voltage. Connect to the high side of the external RSENSE shunt resistor.
3 S- input Negative input of the current monitor with wide common-mode input range (up to 36V relative to OUT). Connect to the load side of the external RSENSE shunt resistor. Differential sense voltage VSENSE = VS+ − VS- (0 to 0.5V recommended, absolute max −0.3 to 0.8V); input current must be limited to ±8.5mA (RPROT recommended for short-circuit protection).

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-23
Category Op-amp/Cmp
Pins 3

Ordering variants

  • ZXCT1109SA-7
  • ZXCT1109SA-7ZXCT1107SA-7
  • ZXCT1109SA-7ZXCT1110W5-7

CAD (KiCad official)

  • Symbol: ZXCT1109SA-7
  • Footprint: Package_TO_SOT_SMD:SOT-23
  • 3D model: SOT-23 (KiCad packages3D, STEP)

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (None pp, sha256 168470be7bc3bef4, 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

Symbol & Footprint

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PCB Footprint

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Datasheet

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