The ZXCT1020 is a precision high-side current sense monitor. Using this type of deviceeliminates the need to disrupt the ground plane when sensing a load current.
The ZXCT1020 uses two external resistors to set the overall voltage gain for applications where improved accuracy at small sense voltages is required. For fixed gain variants
Zetex offers the ZXCT1021 (G=10) and ZXCT1022 (G=100).
The ZXCT1020 footprint follows that of the
ZXCT1021/2 with only 2 additional resistors required:
One resistor between pins 1 and 4 for setting transconductance, and the other betweenpins 3 and 2 for setting overall gain.
Current output enables the user to set the gain via these external resistors. Using two externalresistors to set the gain ensures optimal versatility as the transconductance can be varied to meet the output impedance requirements of the load that the ZXCT1020 has to drive.
The very low offset voltage enables a typical accuracy of 3% for sense voltages of only 10mV,giving better tolerances for small sense resistors necessary at higher currents.
The wide input voltage range of 20V down to as low as 2.5V make it suitable for a range of applications. With a minimum operating current of just 25µA, combined with its SOT25 package make it suitable for portable battery equipment too.
Motherboard power supply current measurement
Programmable current source
Accurate high-side current sensing
Versatile current output scaling
2.5V - 20V operating range
25μA quiescent current
1% typical accuracy
Qualified to AECQ10x
Automotive Compliant PPAP
Accuracy @ VSENSE =100mV
Operating Ambient Temperature Range
-40 to 125 °C
Ground Pin + External Trans Conductance Resistor + Extended Temp Range