Diodes ZXCT1082/83/84/85/86/87 - Manual

ZXCT1082/83/84/85/86/87
ZXCT1082/83/84/85/86/87
Document number: DS32162 Rev. 2 - 2
1 of 13
www.diodes.com
June 2011
© Diodes Incorporated
A Product Line of
Diodes Incorporated
PRECISION HIGH VOLTAGE HIGH-SIDE CURRENT MONITORS
Description
The ZXCT1082 and ZXCT1083 are high side unipolar
current sense monitors. These devices eliminate the need to
disrupt the ground plane when sensing a load current.
The ZXCT1082/1084/1086 have 60V maximum operating
voltage and ZXCT1083/1085/1087 have 40V maximum
operating voltage.
The wide common-mode input voltage range and low
quiescent currents coupled with SOT25 packages make
them suitable for a range of applications; including
automotive and systems operating from industrial 24-28V
rails.
Their quiescent current is only 0.6µA thereby minimizing
current sensing error.
The ZXCT1082 and ZXCT1083 use three external
transconductance/gain setting resistors which increase
versatility by permitting wide gain ranges and optimization of
bandwidths.
The ZXCT1084/5/6/7 are fixed gain voltage output
counterparts of the ZXCT1082/3.
Pin Assignments
Typical Application Circuits
Features
•
Wide supply and common-mode voltage range
o 2.7V to 60V ZXCT1082/84/86
o 2.7V to 40V ZXCT1083/85/87
•
Independent supply and input common-mode voltage
•
Low quiescent current (0.6µA).
•
AEC-Q100 Grade 1 qualified
•
Extended industrial temperate range -40 to 125°C
•
Package SOT25
Applications
•
Automotive current measurement
•
Industrial applications current measurement
• Battery
management
•
Over current monitor
• Power
Management
• Current
sources
1
2
3 4
5 V
CC
S-
OUT
GND
S+
S+ S-
R
SENSE
V
CC
V
SUPPLY
Load
V
LOAD
GND
OUT
ZXCT1084/1085
ZXCT1086/1087
ZXCT1084/85: V
OUT
= 25 x V
SENSE
ZXCT1086/87: V
OUT
= 50 x V
SENSE
S+ S-
R
SENSE
V
CC
V
SUPPLY
R
GT
Load
R
GT
V
LOAD
GND
OUT
ZXCT1082/1083
R
G
ZXCT1082/83: V
OUT
= V
SENSE
* R
G
R
GT