ZXCT1107Q/09Q/10Q
AUTOMOTIVE COMPLIANT MICROPOWER CURRENT MONITOR
Description
The ZXCT1107Q/09Q/10Q products are high-side unipolar current
sense monitors. These devices eliminate the need to disrupt the ground
plane when sensing a load current.
The wide common-mode input voltage range and low quiescent current,
coupled with SOT23 and SOT25 packages, make them suitable for a
range of automotive applications.
The device is line powered and as such doesn’t need a separate supply
rail.
Quiescent current is only 3µA, thereby minimizing current sensing error.
One external gain setting resistor increases versatility by permitting
wide gain ranges.
Pin Assignments
ZXCT1107Q
Top View
2
OUT
1
3
S-
S+
ZXCT1109Q
Top View
2 S+
OUT
1
3
S-
The ZXCT1107Q/09Q/10Q devices
have been qualified to AEC-Q100
Grade 1 and are Automotive Compliant supporting PPAPs.
Features
ZXCT1110Q
Top View
NC
Wide Supply and Common-Mode Voltage Range:
2.5V to 36V
SOT23 and SOT25 Packages
3-Pin ZXCT1107Q/09Q
5-Pin ZXCT1110Q
Low Quiescent Current (3µA)
Extended Industrial Temperature Range -40 to +125°
C
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
Halogen and Antimony Free. “Green” Device (Note 3)
Qualified to AEC-Q100 Standards for High Reliability
PPAP Capable (Note 4)
1
2
3
5
S-
GND
OUT
4
S+
Applications
Automotive Current Measurement
Battery Management
Over Current Monitor
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.
2. See https://www.diodes.com/quality/lead-free/ 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. Refer to https://www.diodes.com/quality/.
Typical Application Circuit
V
SUPPLY
R
SENSE
V
SUPPLY
R
SENSE
ZXCT1107
or
ZXCT1109
S+
OUT
S-
LOAD
ZXCT1110
S+
GND
S-
OUT
OUTPUT
LOAD
OUTPUT
R
GAIN
GND
GND
R
GAIN
ZXCT1107Q/09Q/10Q
Document number: DS37002 Rev. 3 - 2
1 of 17
www.diodes.com
October 2018
© Diodes Incorporated
ZXCT1107Q/09Q/10Q
Pin Descriptions
Package
Name
OUT
S+
S-
GND
NC
Note:
SOT23
ZXCT1107Q
ZXCT1109Q
1
3
2
—
—
1
2
3
—
—
SOT25
ZXCT1110Q
3
4
5
2
1
Description
Output pin (Note 5). Current output.
This is the positive input of the current monitor and has a wide common-mode
input range. This also acts as the analog supply and provides power to internal
circuitry. The current through this pin varies with differential sense voltage.
This is the negative input of the current monitor and has a wide common-mode
input range.
Ground pin and substrate connection.
No connection.
5. For the ZXCT1107Q and ZXCT1109Q pin 1 (OUT) acts as both the output pin and substrate connection. This means that for the ZXCT1107Q and
ZCT1109Q the minimum rail voltage that can be used is 2.5V + V
OUT
(see applications section for more details).
Absolute Maximum Ratings
Description
Voltage on S- and S+ relative to OUT (ZXCT1107Q/09Q)
Voltage on S- and S+ relative to GND (ZXCT1110Q)
Voltage on OUT to GND (ZXCT1110Q)
Differential Sense Voltage, V
SENSE
(Notes 6 and 7)
Maximum Current into S+ and S- (Note 7)
Storage Temperature
Maximum Junction Temperature
Package Power Dissipation (T
A
= +25°
C)
SOT23
SOT25
ESD Ratings
ZXCT1107Q/09Q
HBM
Human Body Model
MM
Machine Model
CDM
Charged Device Model
ZXCT1110Q
HBM
Human Body Model
MM
Machine Model
CDM
Charged Device Model
Notes:
Caution:
Rating
-0.3 to 40
-0.3 to 40
-0.3 to V
S+
-0.3 to +0.8
±8.5
-55 to +150
+150
300 (Derate to Zero at +150°
C)
300 (Derate to Zero at +150°
C)
Unit
V
V
V
V
mA
°
C
°
C
mW
1,500
150
1,000
1,000
150
1,000
V
V
V
V
V
V
6. V
SENSE
= V
S+
- V
S-
.
7. 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.
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 conditions between maximum recommended operating conditions and absolute maximum ratings 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.)
ZXCT1107Q/09Q/10Q
Document number: DS37002 Rev. 3 - 2
2 of 17
www.diodes.com
October 2018
© Diodes Incorporated
ZXCT1107Q/09Q/10Q
Recommended Operating Conditions
Symbol
V
S+
V
SENSE
V
OUT
T
A
Notes:
5.
8.
Parameter
ZXCT1110Q
Common-Mode Input Range (Note 5)
ZXCT1107Q/09Q
Differential Sense Input Voltage Range (V
S+
- V
S-
) (Note 8)
Output Voltage Range (0 ≤ V
SENSE
≤ 100mV)
Ambient Temperature Range
ZXCT1110Q
ZXCT1107Q/09Q
Min
2.5
V
OUT(MAX)
+ 2.5
0
0
0
-40
Max
36
Unit
V
36
0.5
V
S-
- 1
V
S+
- 2.5
+125
°
C
V
V
For the ZXCT1107Q and ZXCT1109Q pin 1 (OUT) acts as both the output pin and substrate connection. This means that for the ZXCT1107Q and
ZCT1109Q the minimum rail voltage that can be used is 2.5V + V
OUT
(see applications section for more details).
The device operates linearly over the range 10mV ≤ V
SENSE
≤
500mV, however at 0V < V
SENSE
<10mV the output current due V
SENSE
is not guaranteed to
remain linear and may fall to 0.
Electrical Characteristics
ZXCT1107Q, ZXCT1109Q
Symbol
I
S-
S- Input Current
(@T
A
= +25° V
S+
= 20V, V
SENSE
= 100mV, R
GAIN
= 0, unless otherwise stated) (Note 6)
C,
Parameter
Conditions
V
SENSE
= 0V
T
A
+25°
C
-40°
C
+125°
C
+25°
C
-40°
C
+125°
C
+25°
C
-40°
C
+125°
C
+25°
C
-40°
C
+125°
C
+25°
C
-40°
C
+125°
C
+25°
C
-40°
C
+125°
C
+25°
C
-40°
C
+125°
C
Full Range
+25°
C
-40°
C
+125°
C
+25°
C
Min
—
—
—
1
—
—
37
—
—
115
—
—
394
—
—
787
—
—
1.965
—
—
—
—
—
—
—
Typ
19
16
35
3
2.2
5.5
45
42
49
124
119
129
408
396
420
810
785
832
2.015
1.965
2.065
370
0.1
0.13
0.05
0.65
Max
100
—
—
10
—
—
54
—
—
134
—
—
422
—
—
832
—
—
2.064
—
—
—
0.4
—
—
—
Unit
nA
V
SENSE
= 0mV
V
SENSE
= 10mV
V
SENSE
= 30mV
I
OUT
Output Current (Note 9)
V
SENSE
= 100mV
µA
V
SENSE
= 200mV
V
SENSE
= 500mV
I
OUT -TC
CMSR
Output Current Temperature Coefficient
Common-Mode Sense Rejection
—
V
S+
= 2.5V to 36V
V
SENSE
(AC) = 10mV
PP
(Note 6) R
GAIN
= 2.5kΩ
mA
ppm/°
C
µA/V
BW
Notes:
6.
9.
-3dB Small Signal Bandwidth
MHz
V
SENSE
= V
S+
- V
S-.
Output current characteristic measured with low impedance ammeter connected to GND.
The device operates linearly over the range 10mV ≤ V
SENSE
≤500mV. At 0 < V
SENSE
< 10mV the output current due V
SENSE
is not guaranteed to remain
linear and may fall to 0.
ZXCT1107Q/09Q/10Q
Document number: DS37002 Rev. 3 - 2
3 of 17
www.diodes.com
October 2018
© Diodes Incorporated
ZXCT1107Q/09Q/10Q
Electrical Characteristics
ZXCT1110Q
Symbol
I
Q
GND Pin Current
V
SENSE
= 0V
I
S-
S- Input Current
Parameter
Conditions
T
A
+25°
C
-40°
C
+125°
C
+25°
C
-40°
C
+125°
C
+25°
C
-40°
C
+125°
C
+25°
C
-40°
C
+125°
C
+25°
C
-40°
C
+125°
C
+25°
C
+25°
C
+25°
C
-40°
C
+125°
C
+25°
C
Min
—
—
—
—
—
—
—
—
—
—
—
—
3.928
—
—
-1.8
—
-1
—
—
—
Typ
3
2.2
5.8
19
16
35
0.1
0.13
0.05
0
-1.8
+2.5
4
3.9
4.08
—
265
-0.78
-0.88
-0.63
0.65
Max
5
—
—
100
—
—
0.4
—
—
±4
—
—
4.072
—
—
1.8
—
—
—
—
—
Unit
µA
(Cont.) (@ T
A
= +25° V
S+
= 20V, V
SENSE
= 100mV, R
GAIN
= 0, unless otherwise stated) (Note 6)
C,
nA
CMSR
Common-Mode Sense Rejection
V
S+
= 2.5V to 36V
µA/V
I
OO
Output Offset Current (Notes 10 and 11)
V
SENSE
= 10mV
µA
G
T
GE
Transconductance
Transconductance Error (Note 11)
V
SENSE
= 10mV to 150mV
V
SENSE
= 10mV to 150mV
—
—
V
SENSE
(AC) = 10mV
PP,
R
GAIN
= 2.5kΩ
mA/V
%
ppm/°
C
V
I
OUT
G
T-TC
Transconductance Temp. Co.
V
OUTH
Output Relative to V
S-
BW
Notes:
-3dB Small Signal Bandwidth
MHz
6. V
SENSE
= V
S+
- V
S-
.
10. Output Offset Current is defined as difference between actual output current and 40µA; measured at V
SENSE
=10mV.
This will include an error due to bias currents of the device.
11. For V
SENSE
> 10mV, the internal voltage-current converter is fully linear. This enables a true offset to be defined and used. At V
SENSE
<10mV the output
current due V
SENSE
is not guaranteed to remain linear and may fall to 0.
ZXCT1107Q/09Q/10Q
Document number: DS37002 Rev. 3 - 2
4 of 17
www.diodes.com
October 2018
© Diodes Incorporated
ZXCT1107Q/09Q/10Q
Typical Characteristics
12
V
OUT
= 0V
V
SENSE
= 0V
T
A
= 125°
C
(Note 12)
9.0
8.0
7.0
V
SENSE
= 0V
V
OUT
= 0V
V
S+
= 20V
10
8
6.0
I
S+
(A)
)
A
µ
(
I
I
S+
(µA)
+
S
6
T
A
= 85°
C
5.0
4.0
V
S+
= 3.7V
4
T
A
= 25°
C
3.0
2.0
2
T
A
= 0°
C
T
A
= -40°
C
1.0
40
0
0
10
20
V
S+
(V)
Input Current vs. V
S+
30
0.0
-40 -25 -10 5
20 35 50 65 80 95 110 125
TEMPERATURE (癈 )
(°
C)
Input Current vs. Ambient Temperature
4.0
3.5
3.0
2.5
1.8
1.6
1.4
1.2
T
A
= 25癈
T
A
= 25°
C
V
OUT
= 0V
V
SENSE
= 0V
I
S+
(µA)
I
S-
(nA)
T
A
= 25°
C
T
A
= 25癈
V
OUT
= 0V
V
SENSE
= 0V
1.0
0.8
0.6
0.4
0.2
0.0
2.0
1.5
1.0
0.5
0.0
0
10
20
30
V
S+
(V)
I
S+
Current vs. V
S+
40
0
10
20
30
V
S+
(V)
I
S-
Current vs. V
S+
40
2500
V
S+
= 20V
V
OUT
= 0V
T
A
= 85°
C
T
A
= 125°
C
450
400
350
T
A
=25°
C
2000
OUTPUT CURRENT (µA)
300
250
200
150
100
50
I
OUT
(A)
)
A
µ
(
I
1500
T
A
= 0°
C
T
A
= -40°
C
T
U
O
1000
500
0
0
100
400
V
SENSE
(mV)
Output Current vs. V
SENSE
200
300
500
600
0
0.0
0.5
1.0
1.5 2.0 2.5 3.0 3.5
OUTPUT VOLTAGE (V)
Output Current vs. Output Voltage
4.0
Note:
12. Typical characteristic only and not guaranteed performance.
ZXCT1107Q/09Q/10Q
Document number: DS37002 Rev. 3 - 2
5 of 17
www.diodes.com
October 2018
© Diodes Incorporated
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