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ZXCT1009Q

High-Side Current Monitor

Datasheet

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Description

The ZXCT1009Q is a micropower high side current sense monitor. This device eliminates the need to disrupt the ground plane when sensing a load current.

It takes a high side voltage developed across a current shunt resistor and translates it into a proportional output current. A user defined output resistor scales the output current into a ground-referenced voltage.

The wide input voltage range of 20V down to as low as 2.5V make it suitable for a range of applications. A minimum operating current of just 4μA, combined with a SOT23 package make it a unique solution for portable battery equipment.

The ZXCT1009Q has been qualified to AEC-Q100 Grade 3 and is Automotive Grade supporting PPAPs.

Feature(s)

Low cost, accurate high-side current sensing
Output voltage scaling
Up to 2.5V sense voltage
2.5V to 20V supply range
4μA quiescent current
1% typical accuracy
SOT23
- Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
- Halogen and Antimony Free. “Green” Device (Note 3)
Automotive Grade
- Qualified to AEC-Q100 Standards for High Reliability
- PPAP Capable (Note 4)

Application(s)

Automotive Current Measurement
Automotive DC Motor Stall Detection
Over Current Monitor

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP)	Automotive
AEC Qualified	Yes
Type	Current Output
Minimum S+ Common-Mode Sense Voltage (V)	2.5
Maximum S+ Common-Mode Sense Voltage (V)	20
Minimum VCC/VB Supply Voltage (V)	-
Maximum VCC/VB Supply Voltage (V)	-
Sense Voltage VMAX (mV)	2500
Maximum Output Voltage (V)	Vs+ -2.5
Voltage output Gain VOUT/VSENSE (V/V)	-
Current output Gain Iout/VSENSE (mA/V)	10
% Accuracy @ VSENSE =100mV Ta (%)	2.5
Quiescent Current (µA)	4
IS- S- Input current (nA)	100
Bandwidth typ (MHz)	2
Operating Ambient Temperature Range (°C)	-40 to 85
Special Features	Simple Current Output Current Monitor

Technical Documents

Calculators

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

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.