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Zetex Semiconductors
Zetex Semiconductors

ZXCT1023 Datasheet Preview

ZXCT1023 Datasheet

High-side Current Sense Monitor

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ZXCT1023 pdf
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A Product Line of
Diodes Incorporated
ZXCT1023
MICROPOWER FIXED GAIN OF 50 CURRENT MONITOR
Description
The ZXCT1023 is a precision high-side current sense monitor. Using
this type of device eliminates the need to disrupt the ground plane
when sensing a load current.
The ZXCT1023 has a fixed internal gain of 50 and the only external
component required is the external current sense resistor; this
combined with its 1.2mm x 1.8mm TDFN package more than quarters
the solution size of the ZXCT1010.
The wide input voltage range of 20V down to as low as 2.5V makes it
suitable for a range of applications.
The combination of operation down to 2.5V and just 3.5µA quiescent
current makes it ideal for single cell Li-Ion/polymer battery
charge/discharge measurement applications.
Pin Connections
TDFN1218-4L
OUT 1
4 S+
GND 2
3 S-
Top View
Features
Accurate high-side current sensing
Fixed gain of 50 output scaling
2.5V – 20V operating range
3.5µA quiescent current
TDFN1218 package
Typical Operating Circuit
S+
RGT
RS S-
Applications
Battery capacity measurement
Battery chargers
Over-current monitor
VOUT
RG
GND
Ordering Information
Order Reference Package
ZXCT1023DFGTA TDFN1218
Device
Marking
1023
Status
Active
Reel Size
(inches)
7
Quantity
per Reel
3000
Tape Width
(mm)
8
ZXCT1023
Document Rev. 1
1 of 6
www.diodes.com
MARCH 2009
©Diodes Incorporated



Zetex Semiconductors
Zetex Semiconductors

ZXCT1023 Datasheet Preview

ZXCT1023 Datasheet

High-side Current Sense Monitor

No Preview Available !

ZXCT1023 pdf
www.DataSheet4U.com
A Product Line of
Diodes Incorporated
ZXCT1023
MICROPOWER FIXED GAIN OF 50 CURRENT MONITOR
Absolute maximum ratings
Voltage on S+1 .......................................-0.5V to 20V
Voltage on S-1,2, OUT1 .................. -0.5V to VS++0.5V
VSENSE3 ............................................... -0.5V to +2.5V
Junction temperature ............................. -40 to125ºC
Storage temperature ............................. -55 to 150ºC
Package power dissipation (TA = 25ºC)
TDFN1812-4 ...................................................... mW
These are stress ratings only. Operation outside the absolute
maximum ratings may cause device failure. Operation at the
absolute maximum rating for extended periods may reduce
device reliability
Notes 1. Measured with respect to GND pin
2. Subject to absolute maximum VSENSE not being
exceeded.
3. VSENSE is defined as the voltage difference across
the sense resistor, RS.
4. The usable VSENSE range is limited by the output
voltage range; and as such will be reduced at lower
VS+ values.
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.
ESD ratings:
Human body model.............................. 2000V
Machine Model ........................................ TBD
Recommended operating conditions
VS+1,
Parameter
Common-mode
sense input range
MIN MAX
2.5 20
VSENSE, Differential Sense
Input voltage range
0 3804
VOUT, Output Voltage range 0 VS- - 1
TA,
Ambient temperature
range
-40
85
Units
V
mV
V
°C
Electrical characteristics
TA = 25°C, VS+ = 3.6V, VSENSE = 50mV, unless otherwise stated
Symbol Parameter
Conditions
Limits
Min. Typ.
VOUT Output voltage
TC5
IQ
IS-
Acc
Gain
ROUT
Output voltage
temperature coefficient
Ground pin current
SENSE- input current
Accuracy
VOUT/VSENSE
Output resistance
BW Bandwidth
PSRR6
Power supply rejection
ratio
VSENSE = 0mV
VSENSE = 10mV
VSENSE = 30mV
VSENSE = 50mV
VSENSE = 100mV, VS+ = 20V
VSENSE = 0V
VSENSE = 0V
VSENSE = 50mV
VSENSE = 50mV
VSENSE (DC) = 10mV
VSENSE (DC) = 50mV
VSENSE = 30mV, VS+ = 2.5 to 20V
425
1.41
2.425
4.85
0.3
500
1.5
2.5
5
50
3.5
-3
50
15
300
1
50 60
Notes 5. TC limits are determined by characterization.
6. PSRR is defined as change in output voltage per change in S+ voltage, VS+.
Max.
50
575
1.59
2.575
5.15
300
8
100
3
Unit
mV
V
ppm
μA
nA
%
V/V
k
kHz
MHz
dB
ZXCT1023
Document Rev. 1
2 of 6
www.diodes.com
MARCH 2009
©Diodes Incorporated


Part Number ZXCT1023
Description High-side Current Sense Monitor
Maker Zetex Semiconductors
Total Page 6 Pages
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