ZXCT1050
Issue 1 - June 2007
2
www.zetex.com
?Zetex Semiconductors plc 2007
Absolute maximum ratings
V
CC
max.
20V
Voltage on SENSE- and SENSE+
-0.6 to V
CC
Voltage on all other pins
-0.6V and V
CC
+0.6V
V
SENSE
= (V
SENSE
+) - (V
SENSE
-)
500mV
Operating temperature
-40 to 125癈
Storage temperature
-55 to 150癈
Maximum junction temperature
150癈
Package power dissipation
300mW
*
at T
A
= 25癈 (De-rate to zero for T
J
= 150癈)
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
Recommended resistor gain setting combinations
Pin function table
Parameter
Min.
Max.
Units
V
SENSE+
Common-mode sense input range
0
V
CC
-2
V
V
CC
Supply voltage range
2.7
20
V
V
SENSE
Differential sense input voltage range
10
300
mV
V
OUT
Output voltage range
0
V
CC
-2
V
T
A
Ambient temperature range
-40
125
癈
Gain
R
SH
R
G
10
7.5k
3.75k
20
7.5k
7.5k
50
7.5k
18.7k
100
7.5k
37.5k
20
3.75k
3.75k
50
1.5k
3.75k
100
750
3.75k
PIN Name
Description
1
V
CC
This is the analog supply and provides power to internal circuitry.
2
GND
Ground pin.
3
OUT
Output pin. A resistor, R
GAIN
, 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 V
CC
2V.
5
SENSE- This is the negative input of the current monitor and has an input range from
0V up to V
CC
2V. The current through this pin varies with differential sense
voltage. A resistor, R
SHUNT
, from this pin to the rail being sensed set the
transconductance of the current monitor.
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