A Product Line of
Diodes Incorporated
ZXCT1107/1109/1110
LOW POWER HIGH-SIDE CURRENT MONITORS
Description
The ZXCT1107/09/10 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 packages make
them suitable for a range of applications; including
adapters, automotive and systems operating from industrial
24V rails.
The device is line powered and as such doesn’t need a
separate supply rail.
Quiescent current is only 3µA thereby minimising current
sensing error. One external gain setting resistor increases
versatility by permitting wide gain ranges.
Pin Assignments
ZXCT1107
Top View
2
OUT
1
3
S-
NEW PRODUCT
S+
ZXCT1109
Top View
2 S+
OUT
1
3
S-
Features
•
•
Wide supply and common-mode voltage range:
2.5V to 36V
SOT23 packages
o
3-pin
ZXCT1107/09
o
5-pin
ZXCT1110
Low quiescent current (3µA).
Extended industrial temperature range -40 to 125°C
AEC-Q100 Grade1 Automotive qualified variants
ZXCT1110
Top View
•
•
•
NC
GND
OUT
1
2
3
5
S-
Applications
•
•
•
•
•
Automotive current measurement
Industrial applications current measurement
Battery management
Over current monitor
Power Management
4
S+
Typical Application Circuit
ZXCT1107/1109/1110
Document number: DS35033 Rev. 3 - 2
1 of 16
www.diodes.com
JULY 2011
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZXCT1107/1109/1110
LOW POWER HIGH-SIDE CURRENT MONITORS
Pin Descriptions
Package
Name
OUT
SOT23
ZXCT1107
ZXCT1109
1
1
1
1
SOT25
ZXCT1110
3
Output pin. 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
Description
NEW PRODUCT
S+
3
2
4
S-
GND
NC
Notes.
2
-
-
3
-
-
5
2
1
1. For the ZXCT1107 and ZXCT1109 pin 1 (OUT) acts as both the output pin and substrate connection. This means that for the
ZXCT1107 and ZXCT1109 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 (ZXCT1107/9)
Voltage on S- and S+ relative to GND (ZXCT1110)
Voltage on OUT to GND (ZXCT1110)
Differential Sense Voltage, V
SENSE
2,3
Current into S+ and S-
Storage Temperature
Maximum Junction Temperature
Package Power Dissipation (T
A
= 25°C)
SOT23
SOT25
ESD Ratings
Human Body Model
Machine Model
3
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 (De-rate to Zero at 150°C)
300 (De-rate to Zero at 150°C)
1000
150
Unit
V
V
V
V
mA
°C
°C
mW
V
V
Operation above the absolute maximum rating may cause device failure. Operation at the absolute maximum ratings,
for extended periods, may reduce device reliability.
Notes:
2. V
SENSE
= V
S+
- V
S-
3. 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.
ZXCT1107/1109/1110
Document number: DS35033 Rev. 3 - 2
2 of 16
www.diodes.com
JULY 2011
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZXCT1107/1109/1110
LOW POWER HIGH-SIDE CURRENT MONITORS
Recommended Operating Conditions
Symbol
Parameter
ZXCT1110
V
S+
Common-mode input range :
4
Min
2.5
V
OUT(MAX)
+ 2.5
0
ZXCT1110
ZXCT1107/9
0
0
-40
Max
36
36
0.5
V
S-
- 1
V
S+
- 2.5
125
Unit
ZXCT1107/9
V
NEW PRODUCT
V
SENSE
V
OUT
T
A
Notes.
Differential Sense Input voltage range (V
S+
-V
S-
)
Output voltage range (0
≤
V
SENSE
≤
100mV)
Ambient temperature range
V
V
°C
4. For the ZXCT1107 and ZXCT1109 pin 1 (OUT) acts as both the output pin and substrate connection. This means that for the
ZXCT1107 and ZXCT1109 the minimum rail voltage that can be used is 2.5V + V
OUT
(see applications section for more details).
Electrical Characteristics
(T
A
= 25°C, V
S+
= 20V, V
SENSE
5
= 100mV, R
GAIN
= 0 unless otherwise stated)
ZXCT1107, ZXCT1109
Symbol
I
S-
Parameter
S- input current
Conditions
V
SENSE
= 0V
5
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
Min
Typ
19
16
35
Max
100
Units
nA
1
V
SENSE
= 0mV
5
3
2.2
5.5
45
42
49
124
119
129
10
37
54
V
SENSE
= 10mV
5
115
134
µA
422
V
SENSE
= 30mV
I
OUT
Output current
6
V
SENSE
= 100mV
5
5
394
408
396
420
810
785
832
787
832
V
SENSE
= 200mV
5
1.965
2.015
1.965
2.065
370
0.1
0.13
0.05
0.65
2.064
mA
ppm/ºC
0.4
µA/V
V
SENSE
= 500mV
I
OUT -TC
Output current temperature coefficient
CMSR
Common-Mode Sense rejection
V
S+
= 2.5V to 36V
V
SENSE
5
(AC)
= 10mV
PP
R
GAIN
= 2.5kΩ
5
-40°C
125°C
full range
25°C
-40°C
125°C
25°C
BW
-3dB Small Signal Bandwidth
MHz
ZXCT1107/1109/1110
Document number: DS35033 Rev. 3 - 2
3 of 16
www.diodes.com
JULY 2011
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZXCT1107/1109/1110
LOW POWER HIGH-SIDE CURRENT MONITORS
Electrical Characteristics
(T
A
= 25°C, V
S+
= 20V, V
SENSE
5
= 100mV, R
GAIN
= 0 unless otherwise stated) (cont.)
ZXCT1110
Symbol
I
Q
Parameter
GND pin current
V
SENSE
5
= 0V
I
S-
S- input current
Conditions
T
A
25°C
-40°C
125°C
25°C
-40°C
125°C
CMSR
Common-Mode Sense rejection
V
S+
= 2.5V to 36V
25°C
-40°C
125°C
25°C
I
OO
Output Offset current
6,7
Min
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
Max
5
Units
µA
NEW PRODUCT
100
nA
0.4
µA/V
±4
µA
4.072
mA/V
V
SENSE
= 10mV
5
G
T
Transconductance
5
V
SENSE
= 10mV to
150mV
5
V
SENSE
= 10mV to
150mV
-40°C
125°C
25°C
-40°C
125°C
25°C
25°C
25°C
3.928
GE
I
OUT
G
T-TC
V
OUTH
Transconductance error
Transconductance temp.co
Output relative to V
S-
-1.8
265
-1
-0.78
-0.88
-0.63
0.65
1.8
%
ppm/ºC
V
-40°C
125°C
V
SENSE
5
(AC)
=
10mV
PP,
R
GAIN
=
2.5kΩ
BW
-3dB Small Signal Bandwidth
25°C
MHz
Notes.
5. V
SENSE
= “V
SENSE+
” – “V
SENSE
-“
6. Output current characteristic measured with low impedance ammeter connected to GND
7. 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.
8. For V
SENSE
> 10mV, the internal voltage-current converter is fully linear. This enables a true offset to be defined and used.
ZXCT1107/1109/1110
Document number: DS35033 Rev. 3 - 2
4 of 16
www.diodes.com
JULY 2011
© Diodes Incorporated
A Product Line of
Diodes Incorporated
ZXCT1107/1109/1110
LOW POWER HIGH-SIDE CURRENT MONITORS
Typical Characteristics
12
V
OUT
= 0V
V
SENSE
= 0V
T
A
= 125°C
9.0
8.0
7.0
V
SENSE
= 0V
V
OUT
= 0V
V
S+
= 20V
10
8
6.0
I
S+
(µA)
T
A
= 85°C
NEW PRODUCT
I
S+
(µA)
6
5.0
4.0
V
S+
= 3.7V
4
T
A
= 25°C
3.0
2.0
T
A
= 0°C
T
A
= -40°C
2
1.0
40
0
0
10
20
30
V
S+
(V)
Input Current vs. V
S+
0.0
-40 -25 -10 5
20 35 50 65 80 95 110 125
TEMPERATURE (°C)
Input Current vs. Ambient Temperature
4.0
3.5
3.0
2.5
I
S+
(µA)
1.8
1.6
1.4
1.2
I
S-
(nA)
1.0
0.8
0.6
T
A
= 25°C
V
OUT
= 0V
V
SENSE
= 0V
T
A
= 25°C
V
OUT
= 0V
V
SENSE
= 0V
2.0
1.5
1.0
0.5
0.0
0
10
20
30
V
S+
(V)
I
S+
Current vs. V
S+
40
0.4
0.2
0.0
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
(µA)
1500
T
A
= 0°C
T
A
= -40°C
1000
500
0
0
100
300
400
500
V
SENSE
(mV)
Output Current vs. V
SENSE
200
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
ZXCT1107/1109/1110
Document number: DS35033 Rev. 3 - 2
5 of 16
www.diodes.com
JULY 2011
© Diodes Incorporated
京公网安备 11010802033920号
EEWORLD
