A Product Line of
Diodes Incorporated
ZXCT1082/83/84/85/86/87
PRECISION HIGH VOLTAGE HIGH-SIDE CURRENT MONITORS
Description Pin Assignments
The ZXCT1082 and ZXCT1083 are high side unipolar
current sense monitors. These devices eliminate the need to
V
OUT 1 5
CC
disrupt the ground plane when sensing a load current.
The ZXCT1082/1084/1086 have 60V maximum operating GND 2
voltage and ZXCT1083/1085/1087 have 40V maximum
operating voltage.
S+34 S-
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 Typical Application Circuits
rails.
R
SENSE
Their quiescent current is only 0.6A thereby minimizing
V V
SUPPLY LOAD
current sensing error.
S+ S-
The ZXCT1082 and ZXCT1083 use three external
ZXCT1084/1085
transconductance/gain setting resistors which increase
versatility by permitting wide gain ranges and optimization of
ZXCT1086/1087
V
CC
Load
bandwidths.
OUT
GND
The ZXCT1084/5/6/7 are fixed gain voltage output
counterparts of the ZXCT1082/3.
ZXCT1084/85: V = 25 x V
OUT SENSE
Features
ZXCT1086/87: V = 50 x V
OUT SENSE
Wide supply and common-mode voltage range
o 2.7V to 60V ZXCT1082/84/86
R
SENSE
o 2.7V to 40V ZXCT1083/85/87
V V
Independent supply and input common-mode voltage
SUPPLY LOAD
Low quiescent current (0.6A).
R
AEC-Q100 Grade 1 qualified
GT R
GT
Extended industrial temperate range -40 to 125C
S+ S-
Package SOT25
V
ZXCT1082/1083
CC
Load
Applications
OUT
GND
Automotive current measurement
R
G
Industrial applications current measurement
Battery management
Over current monitor
ZXCT1082/83: V = V * R
OUT SENSE G
Power Management
R
Current sources GT
1 of 13 June 2011
ZXCT1082/83/84/85/86/87
Diodes Incorporated
www.diodes.com
Document number: DS32162 Rev. 2 - 2
A Product Line of
Diodes Incorporated
ZXCT1082/83/84/85/86/87
Pin Description
Description
PIN Name
Common ZXCT1082/3 ZXCT1084/5/6/7
1 OUT Output pin. Current output. Voltage output
2 GND Ground pin.
This is the positive input of the
An external resistor, R , should
GT
Should be directly connected to
current monitor. It has a wide
be connected from S+ to the input
3 S+ common-mode input range. The the input side (V ) of the
SUPPLY
side (V ) of the sense
SUPPLY
current through this pin varies with
sense resistor.
resistor
differential sense voltage.
Should be directly connected to
This is the negative input of the An external resistor, R , should
GT
4 S- current monitor. It has a wide be connected from S- to the load the load side (V ) of the sense
LOAD
common-mode input range.
resistor.
side (V ) of the sense resistor.
LOAD
5 This is the analogue supply and provides power to internal circuitry.
V
CC
Absolute Maximum Ratings
Parameter Rating Unit
Voltage on S- and S+
ZXCT1082, ZXCT1084, ZXCT1086 -0.3 to 65 V
ZXCT1083, ZXCT1085, ZXCT1087 -0.3 to 45
Voltage on V
CC
ZXCT1082, ZXCT1084, ZXCT1086 -0.3 to 65 V
ZXCT1083, ZXCT1085, ZXCT1087 -0.3 to 45
Voltage on OUT -0.3 to V V
S-
Differential Input Voltage, V - V 800 mV
S+ S-
()
Input current into S+ or S- 12 mA
Storage Temperature -55 to 150 C
Maximum Junction Temperature 150 C
300 at T = 25C
A
Package Power Dissipation mW
(De-rate to zero at 150C)
ESD Rating
Human Body Model 2 kV
Machine Model 200 V
Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings, for
extended periods, may reduce device reliability.
()
The differential input voltage limit, V - V may be exceeded provided that the input current limit into S+ or S- is not exceeded
S+ S-
Recommended Operating Conditions
Symbol Parameter Min Max Units
ZXCT1083/1085/1087 Common-Mode Input Range 2.7 40
V V
IN
ZXCT1082/1084/1086 Common-Mode Input Range 2.7 60
ZXCT1083/1085/1087 Supply Voltage Range 2.7 40
V V
CC
ZXCT1082/1084/1086 Supply Voltage Range 2.7 60
V
Differential Sense Input Voltage Range 0 0.5 V
SENSE
V Output Voltage Range 0 V -1 V
OUT S-
T Ambient Temperature Range -40 125 C
A
2 of 13 June 2011
ZXCT1082/83/84/85/86/87
Diodes Incorporated
www.diodes.com
Document number: DS32162 Rev. 2 - 2