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Issue 4 - April 2007 1 www.zetex.com
© Zetex Semiconductors plc 2007
ZXCT1081
High voltage high-side current monitor
Description
Ordering information
The ZXCT1081 is a high side current sense
monitor with a gain of 10 and a voltage
output. Using this device eliminates the need
to disrupt the ground plane when sensing a
load current.
The wide input voltage range of 40V down to
as low as 3V make it suitable for a range of
applications; including systems operating
from industrial 24-28V rails and power
supplies.
The separate supply pin (V
CC
) allows the device
to continue functioning under short circuit
conditions, giving an end stop voltage at the
output.
For automotive applications the ZXCT1081 has
a 60V transient capability and ambient
temperature range of -40°C to 125°C.
Features
• 3V to 40V continuous high side voltage
• Accurate high-side current sensing
• Output voltage scaling x10
• 4.5V to 12V V
CC
range
• Low quiescent current:
• 80µA supply pin
• 30µA I
SENSE+
• SOT23-5 package
• -40°C to 125°C ambient temperature range
Applications
• Automotive current measurement
• Industrial applications current measurement
• Battery management
• Over current monitor
• Power management
• Power adapters
Pin connections Typical application circuit
Device Package Part mark Reel size
(inches)
Tape width
(mm)
Quantity per
reel
ZXCT1081E5TA SOT23-5 1081 7 8 3000
SENSE-
SENSE+
V
CC
GND
OUT
1
2
3
5
4
SENSE+
4
SENSE
-
5
OUT
3
V
cc
1
GND
2
ZXCT1081
R
SENSE
IN
V
CC
V
V
OUT
