ZXCT1050 PDF даташит
Спецификация ZXCT1050 изготовлена «Zetex Semiconductors» и имеет функцию, называемую «Precision wide input range current monitor». |
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Детали детали
Номер произв | ZXCT1050 |
Описание | Precision wide input range current monitor |
Производители | Zetex Semiconductors |
логотип |
10 Pages
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ZXCT1050
Precision wide input range current monitor
Description
The ZXCT1050 is a wide input range current
monitor, which operates over a range of input
voltages from ground up to VCC-2V. As a
result the ZXCT1050 can be used on the high
or low side of the load.
The ZXCT1050 provides variable gain by
using two external resistors. The first of
which sets the transconductance and the
second setting the overall gain.
Features
• Accurate down to end current sensing
• Output voltage scaling x10
• 0 to VCC-2V sense input range
• 2.7 to 20V supply range
• 50µA quiescent current
• SOT23-5 package
Pin connections
The very low offset voltage enables a typical
accuracy of 1% for sense voltages of only 30mV,
giving better tolerances for small sense
resistors necessary at higher currents.
Applications
• Power supply
• DC motor and solenoid control
• Battery management
• Over current monitor
• Power management
• Short circuit detection
Typical application circuit
VCC 1
GND 2
OUT 3
5 SENSE-
4 SENSE+
IN RSENSE
RSHUNT
SENSE+
SENSE-
VCC ZXCT1050
OUT
Load
OUT
RGAIN
Ordering information
Order code
Pack
ZXCT1050E5TA
SOT23-5
Issue 1 - June 2007
© Zetex Semiconductors plc 2007
Part mark
1050
Reel size
(inches)
7
Tape width
(mm)
8
Quantity
per reel
3000
1 www.zetex.com
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ZXCT1050
Absolute maximum ratings
VCC max.
Voltage on SENSE- and SENSE+
Voltage on all other pins
VSENSE = ‘(VSENSE+) - (VSENSE-)’
Operating temperature
20V
-0.6 to VCC
-0.6V and VCC +0.6V
500mV
-40 to 125°C
Storage temperature
-55 to 150°C
Maximum junction temperature
150°C
Package power dissipation
300mW* at TA = 25°C (De-rate to zero for TJ = 150°C)
Operation above the absolute maximum rating may cause device failure. Operation at the absolute
maximum ratings, for extended periods, may reduce device reliability.
Recommended operating conditions
VSENSE+
VCC
VSENSE
VOUT
TA
Parameter
Common-mode sense input range
Supply voltage range
Differential sense input voltage range
Output voltage range
Ambient temperature range
Min.
0
2.7
10
0
-40
Max.
VCC-2
20
300
VCC-2
125
Units
V
V
mV
V
°C
Recommended resistor gain setting combinations
Gain
10
20
50
100
20
50
100
RSH
7.5k⍀
7.5k⍀
7.5k⍀
7.5k⍀
3.75k⍀
1.5k⍀
750⍀
RG
3.75k⍀
7.5k⍀
18.7k⍀
37.5k⍀
3.75k⍀
3.75k⍀
3.75k⍀
Pin function table
PIN Name
Description
1 VCC
This is the analog supply and provides power to internal circuitry.
2 GND
Ground pin.
3 OUT
Output pin. A resistor, RGAIN, connected from this pin pin down to ground
develops an output voltage.
4 SENSE+ This is the positive input of the current monitor and has an input range from
0V up to VCC – 2V.
5 SENSE- This is the negative input of the current monitor and has an input range from
0V up to VCC – 2V. The current through this pin varies with differential sense
voltage. A resistor, RSHUNT, from this pin to the rail being sensed set the
transconductance of the current monitor.
Issue 1 - June 2007
© Zetex Semiconductors plc 2007
2
www.zetex.com
No Preview Available ! |
ZXCT1050
Electrical characteristics
Test conditions TA = 25°C, VSENSE+ = 10V, VCC = 12V, VSENSE = 100mV, RSH = 7.5k⍀, RG = 3.75k⍀.
Symbol
IQ
VOUT
ISENSE+
ISENSE-
VOUT TC
Gain
Accuracy
BW
PSRR
CMRR
Parameter
Conditions
VCC pin current
VSENSE = 0V
Output voltage
VSENSE = 0V
=30mV
=100mV
=150mV
VSENSE+ input current VSENSE = 0V
VSENSE- input current VSENSE = 0V
VOUT variation with
temperature
See note (*)
VOUT/VSENSE
Total output error
Bandwidth
VSENSE(DC)
= 10mV
VSENSE(DC)
= 100mV
VSENSE(AC)
= 10mVPP
CL = 5pF,
Power supply
rejection ratio
VCC = 2.7V to 20V
VSENSE+ = 0.7V
Common mode
rejection ratio
VCC = 20V
VSENSE+ = 0 to 18V
Min.
0
285
0.97
1.45
-3
Typ.
45
3
300
1.00
1.50
60
15
10
300
0.8
60
70
Max. Units
70 µA
15 mV
315 mV
1.03 V
1.55 V
150 nA
150 nA
300 ppm/°C
3%
kHz
MHz
dB
dB
NOTES:
(*) Temperature dependent measurements are extracted from characterisation and simulation results.
Issue 1 - June 2007
© Zetex Semiconductors plc 2007
3
www.zetex.com
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Номер в каталоге | Описание | Производители |
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