ZXCT1010_06 ZETEX [Zetex Semiconductors], ZXCT1010_06 Datasheet - Page 7

• Manufacturer Part Number: ZXCT1010_06
• Description: Enhanced high-side current monitor
• Manufacturer: ZETEX [Zetex Semiconductors]

Bi-directional current sensing
The ZXCT1010 can be used to measure current bi-
directionally, if two devices are connected as shown
opposite.
If the voltage V1 is positive with respect to the voltage V2
the lower device will be active, delivering a proportional
output current to R
across Rsense, the upper device will be inactive and will not
contribute to the current delivered to R
positive than V1, current will be flowing in the opposite
direction, causing the upper device to be active instead.
Non-linearity will be apparent at small values of V
to offset current contribution. Devices can use separate
output resistors if the current direction is to be monitored
independently.
Bi-directional transfer function
Issue 9 - July 2006
© Zetex Semiconductors plc 2006
Output Current v Sense Voltage
5
4
3
2
1
0
Bidirectional Transfer Function
-400
Sense Voltage (mV)
-200
OUT
0
. Due to the polarity of the voltage
200
400
OUT
. When V2 is more
7
SENSE
due
ZXCT1010
www.zetex.com