ZXCT1082 Datasheet, PDF (1/13 Pages) Diodes Incorporated – PRECISION HIGH VOLTAGE HIGH-SIDE CURRENT MONITORS

A Product Line of
Diodes Incorporated
ZXCT1082/83/84/85/86/87
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.
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).
• 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
Pin Assignments
OUT 1
GND 2
S+ 3
5 V_CC
4 S-
Typical Application Circuits
R_SENSE
V_SUPPLY
S+
S-
ZXCT1084/1085
V_CC ^{ZXCT1086/1087}
GND
OUT
V_LOAD
Load
ZXCT1084/85:
ZXCT1086/87:
V_OUT = 25 x V_SENSE
V_OUT = 50 x V_SENSE
V_SUPPLY
R_SENSE
R_{GT RGT}
S+
S-
V_{CC ZXCT1082/1083}
GND
OUT
R_G
V_LOAD
Load
ZXCT1082/83: V_OUT = V_SENSE * R_G
R_GT
ZXCT1082/83/84/85/86/87
Document number: DS32162 Rev. 1 - 2
1 of 13
www.diodes.com
May 2010
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