Diodes Incorporated ZXCT1009 High-Side Current Monitors
Diodes Inc. ZXCT1009 High-Side Current Monitors are compact, low-power devices that accurately measure load current without interrupting the system ground path. By sensing the voltage across an external shunt resistor on the high side of the supply rail, the ZXCT1009 converts the measured current into a proportional output current, which can be scaled to a ground-referenced voltage using a user-selected output resistor. Operating from supply voltages ranging from 2.5V to 20V, the device supports sense voltages up to 2.5V and delivers a typical accuracy of 1%. These features make the current monitors an efficient solution for precision current monitoring applications. The ultra-low 4µA quiescent current and small SOT23 or SM8 package options make the components suitable for portable and space-constrained designs.
Designed for a wide range of power management and monitoring tasks, the Diodes Inc. ZXCT1009 is ideal for battery chargers, smart battery packs, DC motor control systems, over-current monitoring, level translation, and programmable current sources. The devices offer a transconductance of 10,000µA/V, enabling straightforward current-to-voltage conversion, while the high-side sensing architecture simplifies implementation in battery-powered and industrial systems. With an operating temperature range of -40°C to +85°C and automotive-qualified options available, the ZXCT1009 provides a reliable and cost-effective current-sensing solution for modern electronic designs requiring accurate power measurement and protection.
Features
- 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 and SM8 packages
- AEC-Q100.3 qualified (ZXCT1009FTA only)
Applications
- Battery chargers
- Smart battery packs
- DC motor control
- Over current monitors
- Power management
- Level translating
- Programmable current sources
Specifications
- 25mA maximum continuous output current
- Maximum power dissipation
- 450mW for SOT23
- 2W for SM8
- 2500mV maximum sense voltage
- 100nA maximum input current
- 10,000µA/V typical transconductance
- -40°C to +85°C operating temperature range
Application Circuit
