Image shown is for reference only. Actual package may vary. Refer to the product data sheet for package details. SOT23

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ZXCT1109

Low Pwer High Side Current Monitor

Datasheet

Evaluation Boards and User Guides

ZXCT1109EV1-User-Guide.pdf (162 KB)

Contact Sales

Description

The ZXCT1107/09/10 are high side unipolar current sense monitors. These devices eliminate the need to disrupt the ground plane when sensing a load current. The wide common-mode input voltage range and low quiescent current coup°C with SOT23 packages make them suitable for a range of applications; including adapters, automotive and systems operating from industrial 24 rails. The device is line powered and as such doesn’t need a separate supply rail. Quiescent current is only 3µA thereby minimising current sensing error. One external gain setting resistor increases versatility by permitting wide gain ranges.

Feature(s)

High accuracy current measurement: o improved system precision

Simple to use: o low external component count

High side monitoring: o no disruption of ground plane

Low quiescent current (3uA): o high efficiency

Wide common mode range (2.5V to 36V): o suitable for automotive and industrial applications with supplies up to 36V

Application(s)

Automotive current monitoring

Industrial current monitoring

Specifications & Technical Documents

Product Parameters

Compliance (Only Automotive Supports PPAP)	Standard
AEC Qualified	No
Type	Current Output
Quiescent Current (µA)	3
Minimum S+ Common-Mode Sense Voltage (V)	2.5
Maximum S+ Common-Mode Sense Voltage (V)	36
Minimum VCC/VB Supply Voltage (V)	-
Maximum VCC/VB Supply Voltage (V)	-
Sense Voltage VMAX (mV)	800
Maximum Output Voltage (V)	VS- -1
Voltage output Gain VOUT/VSENSE (V/V)	-
Current output Gain Iout/VSENSE (mA/V)	4
% Accuracy @ VSENSE =100mV Ta (%)	3.4
IS- S- Input current (nA)	19
Bandwidth typ (MHz)	0.3
Operating Ambient Temperature Range (°C)	-40 to 125
Special Features	Simple Current Output Current Monitor

Technical Documents

Calculators

Zetex-CM-Calculator-V1.01.xls (1.5 MB)

Evaluation Boards and User Guides

ZXCT1109EV1-User-Guide.pdf (162 KB)

Recommended Soldering Techniques

TN1.pdf

Diodes Incorporated's current monitors are high-performance, high-side/power rail current measurement ICs. They greatly simplify the measurement of load currents without disturbing the ground plane/reference point.....

The current monitor families contain variants with quiescent currents as low as 3µA, and others with operating voltages up to 60V, proving solutions for overcurrent detection in consumer, industrial, and automotive applications. The portfolio includes current output variants which via an external resistor to ground to provide adjustable gain, and voltage output variants with fixed gains.

Automotive-compliant variants are available which are qualified to AEC-Q100 Grade 1 in IATF 16949 facilities supporting PPAP documentation.

RoHS CofC

RoHSFile

Purchase & Availability

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN #	Issue Date	Implementation Date	Subject
PCN-2770	2025-10-30	2025-10-30	Add Fab Site Code, Country of Diffusion (COD) and Assembly Site Origin (ASO) on Product and Shipping Labels for all Diodes Products