A Product Line of
Diodes Incorporated
ZXCT1082Q/83Q/84Q/85Q/86Q/87Q
AUTOMOTIVE GRADE PRECISION HIGH VOLTAGE HIGH-SIDE CURRENT MONITORS
Description
The ZXCT1082Q/83Q/84Q/85Q/86Q/87Q are high side unipolar
current sense monitors. These devices eliminate the need to disrupt
the ground plane when sensing a load current.
The ZXCT1082Q/1084Q/1086Q have 60V maximum operating
voltages
and
ZXCT1083Q/1085Q/1087Q
have
40V
maximum
operating voltages.
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
ZXCT1082Q
and
ZXCT1083Q
use
three
external
Pin Assignments
OUT 1
GND 2
S+ 3
4
S-
5
V
CC
Typical Application Circuits
R
SENSE
V
SUPPLY
S+
V
CC
S-
V
LOAD
transconductance/gain setting resistors which increase versatility by
permitting wide gain ranges and optimization of bandwidths.
The
ZXCT1084Q/85Q/86Q/87Q are fixed
gain voltage output
ZXCT1084/1085
ZXCT1086/1087
OUT
V
OUT
= 25 x V
SENSE
V
OUT
= 50 x V
SENSE
Load
counterparts of the ZXCT1082Q/83.
The ZXCT1082Q/3Q/4Q/5Q/6Q/7Q have been qualified to AEC-Q100
Grade 1 and are Automotive Grade supporting PPAPs.
GND
ZXCT1084Q/85Q:
ZXCT1086Q/87Q:
Features
Wide supply and common-mode voltage range
2.7V to 60V
2.7V to 40V
ZXCT1082Q/84Q/86Q
ZXCT1083Q/85Q/87Q
R
SENSE
V
SUPPLY
R
GT
S+
R
GT
S-
Load
V
LOAD
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
SOT25 package in Green Molding
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Automotive Grade
Qualified to AEC-Q100 Standards for High Reliability
PPAP Capable (Note 4)
V
CC
ZXCT1082/1083
GND
OUT
R
G
ZXCT1082Q/83Q:
V
OUT
=V
SENSE
×
Applications
Automotive current measurement
Automotive battery management
Automotive over current monitor
R
G
R
GT
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green"
and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
4. Automotive products are AEC-Q100 qualified and are PPAP capable. Automotive, AEC-Q100 and standard products are electrically and thermally
the same, except where specified. For more information, please refer to http://www.diodes.com/quality/product_compliance_definitions.
ZXCT1082Q/83Q/84Q/85Q/86Q/87Q
Document number: DS37015 Rev. 1 - 2
1 of 13
www.diodes.com
April 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZXCT1082Q/83Q/84Q/85Q/86Q/87Q
Pin Description
PIN
1
2
3
Name
OUT
GND
S+
Common
Output pin.
Ground pin.
This is the positive input of the current
monitor. It has a wide common-mode
input range. The current through this pin
varies with differential sense voltage.
This is the negative input of the current
monitor. It has a wide common-mode
input range.
Function
ZXCT1082Q/83Q
Current output.
An external resistor, R
GT
, should be
connected from S+ to the input side
(V
SUPPLY
) of the sense resistor
An external resistor, R
GT
, should be
connected from S- to the load side
(V
LOAD
) of the sense resistor.
ZXCT1084Q/85Q/86Q/87Q
Voltage output
Should be directly connected to the input
side (V
SUPPLY
) of the sense resistor.
Should be directly connected to the load
side (V
LOAD
) of the sense resistor.
4
5
S-
V
CC
This is the analogue supply and provides power to internal circuitry.
Absolute Maximum Ratings
Parameter
Voltage on S- and S+
Voltage on V
CC
Voltage on OUT
Differential Input Voltage, V
S+
- V
S-
(Notes 5, and 6)
Input current into S+ or S- (Notes 5, and 6)
Storage Temperature
Maximum Junction Temperature
Package Power Dissipation (De-rate to zero at +150°C)
ESD Rating
HBM
MM
CDM
Caution:
Rating
ZXCT1082Q/84Q/86Q
ZXCT1083Q/85Q/87Q
-0.3 to 65
-0.3 to 45
-0.3 to 65
-0.3 to V
S-
±800
±12
-55 to +150
+150
300 at T
A
= +25°C
3
250
tbd
-0.3 to 45
Unit
—
V
V
V
mV
mA
°C
°C
mW
kV
V
kV
Human Body Model
Machine Model
Charged Device Model
Stresses greater than the 'Absolute Maximum Ratings' specified above, may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
Semiconductor devices are ESD sensitive and may be damaged by exposure to ESD events. Suitable ESD precautions should be taken when handling
and transporting these devices.
Notes:
5.
For the ZXCT1082/83 V
SENSE
= “V
SUPPLY
” – “V
LOAD
“ where V
LOAD
is the load voltage or the lower potential side of the sense resistor.
For the ZXCT1083/84/85/86 V
SENSE
= “V
S+
” – “V
S-
“
6.
The differential input voltage limit, V
S+
- V
S-
may be exceeded provided that the input current limit into S+ or S- is not exceeded
Recommended Operating Conditions
Symbol
V
IN
V
CC
V
SENSE
V
OUT
T
A
Parameter
ZXCT1083Q/1085Q/1087Q Common-Mode Input Range
ZXCT1082Q/1084Q/1086Q Common-Mode Input Range
ZXCT1083Q/1085Q/1087Q Supply Voltage Range
ZXCT1082Q/1084Q/1086Q Supply Voltage Range
Differential Sense Input Voltage Range
Output Voltage Range (Note 5)
Ambient Temperature Range
Min
2.7
2.7
2.7
2.7
0
0
-40
Max
40
60
40
60
0.5
V
S-
-1
+125
Units
V
V
V
V
°C
ZXCT1082Q/83Q/84Q/85Q/86Q/87Q
Document number: DS37015 Rev. 1 - 2
2 of 13
www.diodes.com
April 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZXCT1082Q/83Q/84Q/85Q/86Q/87Q
Electrical Characteristics
Test Conditions T
A
= +25C, V
S+
= 12V, V
CC
= 5 V, V
SENSE
= 100mV (Note 5), ZXCT1082Q/83Q R
GT
= 5kΩ, R
G
= 125kΩ; unless otherwise
stated. (FT = -40°C to +125°C)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
Input
—
—
1.7
—
µA
S+ input current
I
S+
—
—
5
T
A
= FT
V
SENSE
= 0mV (Note 5)
—
—
1.7
—
S- input current
µA
I
S-
—
—
5
T
A
= FT
V
SENSE
= 0mV
V
IO
Input Offset Voltage
(Note 7)
ZXCT1082Q/ 83Q/ 84Q/ 85Q
ZXCT1086Q/ 87Q
Temperature co-efficient
Output
G
T
G
T-ERR
G
T-TC
Z
OUT
G
V
G
V-ERR
G
V-TC
Z
OUT
V
OUTH
Notes:
—
T
A
= FT
T
A
= FT
—
—
—
—
±0.2
—
—
±4
200
—
—
10
1¦¦5
25
50
—
—
100
125
V
LOAD
- 0.8
V
S-
- 0.8
±1
±2.5
±3
—
—
+1
+2
—
—
—
—
+1
+2
—
—
—
—
µV/K
µA/V
%
nA/K
GΩ¦¦pF
V/V
%
ppm/K
kΩ
V
mV
Transconductance
Transconductance error
(Note 9)
Transconductance
temperature co-efficient
Output impedance
Gain
Gain error (Note 9)
Voltage gain temperature
co-efficient
Output impedance
Output relative to common
mode, V
S-
ZXCT1084Q/85Q/86Q/87Q
ZXCT1082Q/83Q
ZXCT1084Q/85Q/86Q/87Q
ZXCT1084Q/85Q/86Q/87Q
V
SENSE
= 10mV to 150mV (Note 5)
ZXCT1082Q/83Q
V
SENSE
= 10mV to 150mV
(Notes 5, 8)
ZXCT1082Q/83Q
—
—
T
A
= FT
T
A
= FT
ZXCT1084Q/85Q
ZXCT1086Q/87Q
—
T
A
= FT
T
A
= FT
—
-1
-2
—
—
—
—
-1
-2
—
—
V
LOAD
- 1
V
S-
- 1
5. For the ZXCT1082/83 V
SENSE
= “V
SUPPLY
” – “V
LOAD
“ where V
LOAD
is the load voltage or the lower potential side of the sense resistor.
For the ZXCT1083/84/85/86 V
SENSE
= “V
S+
” – “V
S-
“
7. V
IO
is extrapolated from measurements for the gain-error test.
8. For V
SENSE
> 10mV, the internal voltage-current converter is fully linear. This enables a true offset to be defined and used.
9. Gain or transconductance error is calculated by applying two values of V
SENSE
and calculating the error of the slope vs. the ideal.
ZXCT1082Q/83Q/84Q/85Q/86Q/87Q
Document number: DS37015 Rev. 1 - 2
3 of 13
www.diodes.com
April 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZXCT1082Q/83Q/84Q/85Q/86Q/87Q
Electrical Characteristics
(cont.)
Test Conditions T
A
= +25C, V
S+
= 12V, V
CC
= 5 V, V
SENSE
= 100mV, ZXCT1082Q/83Q R
GT
= 5kΩ, R
G
= 125kΩ; unless otherwise stated.
(FT = -40°C to +125°C)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
AC characteristics
BW
t
s(0.1%)
-3dB Small Signal
Bandwidth
Settling time (0.1%)
Output noise current
density
Total output noise current
Output noise voltage
density
V
SENSE (AC)
= 10mV
PP
(Note 5)
V
SENSE
= 50mV to 300mV step
V
SENSE
= 50mV to 200mV step
f = 1kHz
f = 10kHz
f = 0.1Hz to 100kHz
f = 1kHz
f = 10kHz
ZXCT1084Q/85Q
ZXCT1086Q/87Q
ZXCT1084Q/85Q
ZXCT1086Q/87Q
ZXCT1084Q/85Q
ZXCT1086Q/87Q
—
T
A
= FT
—
T
A
= FT
—
T
A
= FT
—
T
A
= FT
—
T
A
= FT
—
T
A
= FT
—
T
A
= FT
—
T
A
= FT
—
T
A
= FT
G = 25
G = 50
G = 25
G = 50
ZXCT1082Q/83Q
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
80
75
80
75
80
75
80
75
80
80
80
80
80
80
80
80
500
200
5
7
12
10
3
1.5
2.9
1.2
2.3
390
730
0.6
—
100
—
100
—
100
—
100
—
100
—
100
—
100
—
100
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
2
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
kHz
µs
pA/Hz
nA
RMS
1
i
N-OUT
µV/Hz
v
N-OUT
Total output noise voltage f = 0.1Hz to 100kHz
Power Supply
I
CC
V
CC
Supply current
V
SENSE
= 0V
ZXCT1083Q/85Q: V
SENSE
= 60mV;
V
CC
= 2.7V to 40V
PSRR
(Note 10)
ZXCT1087Q: V
SENSE
= 30mV;
V
CC
= 2.7V to 40V
ZXCT1082Q/84Q: V
SENSE
= 60mV;
V
CC
= 2.7V to 60V
ZXCT1086Q: V
SENSE
= 30mV;
V
CC
= 2.7V to 60V
ZXCT1083Q/85Q: V
SENSE
= 60mV;
V
S+
= 2.7V to 40V
CMRR
(Note 10)
Common-mode sense
rejection ratio
ZXCT1087Q: V
SENSE
= 30mV;
V
S+
= 2.7V to 40V
ZXCT1082Q/84Q: V
SENSE
= 60mV;
V
S+
= 2.7V to 60V
ZXCT1086Q: V
SENSE
= 30mV;
V
S+
= 2.7V to 60V
Note:
10. Measured relative to input
µV
RMS
µA
—
V
CC
Supply rejection ratio
dB
dB
ZXCT1082Q/83Q/84Q/85Q/86Q/87Q
Document number: DS37015 Rev. 1 - 2
4 of 13
www.diodes.com
April 2014
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZXCT1082Q/83Q/84Q/85Q/86Q/87Q
Typical Characteristics
(@ V
S+
= 12V, V
CC
= 5V V
SENSE
= 100mV, R
GT
= 5kΩ, R
G
= 125kΩ, T
A
= +25°C, unless otherwise stated.)
20
18
16
14
I
CC
(
µ
A)
1.8
1.6
1.4
1.2
125°C
85°C
25°C
-40°C
10
8
6
4
2
0
0
10
20
I
S+
(
A)
12
1.0
0.8
0.6
V
SENSE
= 0V
V
S+
= 25
C
R
GT
= 5k
R
G
= 125k
0.4
0.2
60
V
SENSE
= 0V
T
A
= 25
C
V
CC
= 5V
R
GT
= 5k
R
G
= 125k
30
40
50
V
CC
(V)
Supply Current vs. Supply Voltage
0.0
0
10
30
40
50
V
S+
(V)
S+ Input Current vs. S+ Voltage
20
60
3.0
100
90
2.5
80
70
I
S+
(
A)
60
50
40
2.0
I
S+
(
A)
1.5
1.0
30
20
10
V
CC
= 5V
T
A
= 25
C
V
S+
12V
0.5
0.0
R
GT
= 5k
R
G
= 125k
0
10
30
40
V
CC
(V)
I
S+
Input Current vs. V
CC
20
50
60
0
0
0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5
V
SENSE
(V)
I
S+
Input Current vs. V
SENSE
1.450
1.445
1.440
I
S+
Input Current (
A)
1.435
I
S-
(
A)
1.6
1.4
1.2
1.0
0.8
0.6
V
SENSE
= 0V
V
S+
12V
V
CC
= 5V
R
GT
= 5k
R
G
= 125k
1.430
1.425
1.420
1.415
1.410
1.405
1.400
-40 -25 -10
5
0.4
0.2
0.0
0
10
20
V
CC
= 5V
T
A
= 25
C
V
SENSE
= 0V
R
GT
= 5k
R
G
= 125k
20 35 50 65 80 95 110 125
T
A
Temperature (
C)
I
S+
Input Current vs. Ambient Temperature
30
40
50
V
S+
(V)
I
S-
Input Current vs. S+ Voltage
60
ZXCT1082Q/83Q/84Q/85Q/86Q/87Q
Document number: DS37015 Rev. 1 - 2
5 of 13
www.diodes.com
April 2014
© Diodes Incorporated
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