ZXCT1110W5-7

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 coupled with SOT23 packages make them suitable for a range of applications; including adapters, automotive and systems operating from industrial 24V 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. The current monitor ICs ZXCT1107, ZXCT1109 and ZXCT1110 all use a similar application circuit topology for high - side current sensing, with small differences. The ZXCT1110 has a separate ground pin whereas the ZXCT1107 and ZXCT1109 do not. The use of ZXCT1110 allows reduction of the absolute current measurement error in some applications by providing a reduced output offset current. The ZXCT1107 provides a mirror image pin assignment of the ZXCT1109 to ease PCB layout in very small equipment designs. The basic application circuit for each device requires two external resistors. The resistor RSENSE is connected in the path of the current to be monitored. The resistor RGAIN converts the device output current to a voltage for convenient processing by a further device, such as a comparator, amplifier or analog - to - digital converter within a microcontroller system. The current monitor output current is defined through the nominal transconductance of 4mA/V.

Applications

• Automotive current measurement
• Industrial applications current measurement
• Battery management
• Over current monitor Power Management

Key features

• Wide supply and common - mode voltage range: 2.5V to 36V
• SOT23 packages
• 3 - pin ZXCT1107/09
• 5 - pin ZXCT1110
• Low quiescent current (3μA)
• Extended industrial temperature range - 40 to 125°C
• AEC - Q100 Grade1 Automotive qualified variants