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ZXCT1023DFGTA

P1-P3P4-P6P7-P8
ZXCT1023
MICROPOWER FIXED GAIN OF 50 CURRENT MONITOR
ZXCT1023
Document number: DS31997 Rev. 3 - 2
4 of 8
www.diodes.com
June 2011
© Diodes Incorporated
Typical DC Characteristics
V
SENSE
= 0V, V
S+
= 3.6V
0
0.5
1
1.5
2
2.5
2 4 6 8 10 12 14 16 18 20
V
S+
(V)
I
S+
(µA)
T
A
= -40°C
T
A
= 0°C
T
A
= 85°C
Vs+ = 3.6v
Relative to gain = 50
-2%
-1%
0%
1%
2%
3%
0 1020304050
V
SENSE
(mV)
Differential Gain Error
T
A
= 85°C
T
A
= -40°C
T
A
= 0°C
T
A
= 25°C
S+ Input Current vs. Supply voltage Normalised Gain Error vs. Sense Voltage
V
S+
= 3.6V
-40°C
25°C
85°C
20
30
40
50
60
70
024681
0
V
SENSE
(mV)
Differential Gain (
Δ
V
OUT
/
Δ
V
SENSE
)
T
A
= 0°C
V
S+
= 3.6V
0
0.5
1
1.5
2
2.5
3
3.5
0 102030405060
V
SENSE
(mV)
V
OUT
(V)
T
A
= 85°C
T
A
= 25°C
T
A
= 0°C
T
A
= -40°C
Differential Gain vs. Sense Voltage Output Voltage vs. Sense Voltage
T
A
= 25°C
V
SENSE
= 10mV
V
SENSE
= 30mV
V
SENSE
= 50mV
0
0.5
1
1.5
2
2.5
3
2 4 6 8 10 12 14 16 18 20
V
S+
(V)
V
OUT
(V)
V
S+
=3.6V
w.r.t. V
OUT
at 25°C
V
SENSE
= 10mV, 30mV, 50mV
10mV
30mV
30mV
50mV
50mV
-0.6%
-0.4%
-0.2%
0.0%
0.2%
0.4%
0.6%
-40 -15 10 35 60 85
Temperature (°C)
ΔV
OUT
%Error
Output Voltage vs. Input voltage Relative Output Voltage Change vs. Temperature
ZXCT1023
MICROPOWER FIXED GAIN OF 50 CURRENT MONITOR
ZXCT1023
Document number: DS31997 Rev. 3 - 2
5 of 8
www.diodes.com
June 2011
© Diodes Incorporated
Typical AC Characteristics
-20
-10
0
10
20
30
40
10E+0 100E+0 1E+3 10E+3 100E+3 1E+6 10E
+
frequency (Hz)
Gain (dB)
V
SENSE
= 50mV
V
SENSE
= 10mV
V
S+
=3.6V
T
A
=25°C
T
A
= 25°C
V
SENSE
= 50mV
0
10
20
30
40
50
60
70
0.01 0.1 1 10 100 100
0
Frequency (kHz)
PSRR (dB)
V
S+
= 10V
V
S+
=
Small Signal Frequency Response Power Supply Rejection Ratio
-5
0
5
10
15
20
25
0 50 100 150 200 250 300
Time (µs)
Input (mV)
-0.2
0
0.2
0.4
0.6
0.8
1
1.2
Output (V)
Input
Output
V
S+
=3.6V, T
A
= 25°C
V
SENSE
= 20mV
-10
0
10
20
30
40
50
60
0 50 100 150 200
Time (µs)
Input (mV)
-0.5
0.0
0.5
1.0
1.5
2.0
2.5
3.0
Output (V)
Input
Output
V
S+
=3.6V, T
A
= 25°C
V
SENSE
= 50mV
Large Signal Pulse Response 20mV Large Signal Pulse Response 50mV
49
50
51
52
53
54
55
56
0 50 100 150 200
time (µs)
Sense voltage (mV)
2.45
2.50
2.55
2.60
2.65
2.70
2.75
2.80
Output voltage (V)
Input
Output
V
S+
=3.6V, T
A
=25°C
V
SENSE
= 50mV(DC) + 5mV
44
45
46
47
48
49
50
51
0 25 50 75 100 125 150
time (µs)
V
SENSE
(mV)
2.20
2.25
2.30
2.35
2.40
2.45
2.50
2.55
V
OUT
(V)
Input
Output
V
S+
=3.6V, T
A
=25°C
V
SENSE
= 50mV(DC) - 5mV pulse
Small Signal Positive Pulse Response Small Signal Negative Pulse Response
ZXCT1023
MICROPOWER FIXED GAIN OF 50 CURRENT MONITOR
ZXCT1023
Document number: DS31997 Rev. 3 - 2
6 of 8
www.diodes.com
June 2011
© Diodes Incorporated
Application Information
The ZXCT1023 is line powered (derives its power from
the rail being sensed) this reduces the number of pins
used and PCB trace routing. The fixed gain of 50
reduces the PCB area by reducing the number of
external components. The only external component
required is the sense resistor. This coupled with the
1.2mm x 1.8mm TDFN package makes the solution size
very small.
The fixed gain of 50 has been chosen to meet the
normal requirements of most applications.
–
+
GND
S
-
R
S
R
GT
S
+
V
OUT
R
G
The ZXCT1023 has its gain setting resistor, R
G
, set at
15kΩ which further reduces power consumption at
larger V
SENSE
.
Application Examples
Please refer to Zetex AN39 for sample applications.
Ordering Information
Order Reference Package
Device
Marking
Status
Reel Size
(inches)
Quantity
Per Reel
Tape Width
(mm)
ZXCT1023DFGTA TDFN1218 23 Active 7 3000 8
P1-P3P4-P6P7-P8

ZXCT1023DFGTA

Mfr. #:
Buy ZXCT1023DFGTA
Manufacturer:
Diodes Incorporated
Description:
Current & Power Monitors & Regulators 2.5V - 20V 3.5uA CURRENT Monitor
Lifecycle:
New from this manufacturer.
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