ZXCT1020E5TA View Datasheet(PDF) - Zetex => Diodes
Part Name
Description
Manufacturer
ZXCT1020E5TA Datasheet PDF : 14 Pages
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ZXCT1020
Absolute maximum ratings
Voltage on VB with respect to GND pin
Voltage on S+(a), S-(b), OUT with respect to GND pin
VSENSE(c)
Junction temperature
Storage temperature
Package power dissipation (Tamb = 25°C) SOT23-5
-0.5V to 20V
-0.5V to VB+0.5V
-0.5V to +2.5V(d)
-40°C to125°C
-55°C to 150°C
300mW
NOTES:
(a) Subject to VSENSE+ never going 6V below VB.
(b) Subject to absolute maximum VSENSE not being exceeded.
(c) VSENSE is defined as the voltage difference across the sense resistor. and is the voltage across resistor RSH plus the
voltage between S+ and S-.
(d) VSENSE might need to be reduced when used with smaller values of RSH and at larger rails due to increased power dissipation.
Pin out information
Pin Name
1
S+
2
GND
3
OUT
4
VB
5
S-
Pin function
Positive sense input. Should be tied to positive side of sense resistor via
resistance (RSH) of the order of 150⍀ to 1.5k⍀.
Ground and substrate connection of device.
Current output. A gain setting resistor (RG) referenced to GND should be
connected to this pin to set overall voltage gain of:
Gain = RG/RSH
The resistance, RG, placed on out will set the ZXCT1020 output impedance equal
to RG. When driving low impedance loads both RG and RSH should be reduced.
Input voltage pin. Provides bias to current monitor and should be tied to the
rail whose current is being monitored.
High impedance negative sense voltage input
Recommended operating conditions
VSENSE+
VB
VSENSE
VOUT
RSH
TA
Parameter
Common-mode sense input range
Bias pin input voltage range (*)
Differential sense Input voltage range
Output voltage range
Shunt resistor value
Ambient temperature range
Min.
2.5
2.5
0
0
120
-40
Max.
20
20
1.5
VSENSE- - 1
2000
85
NOTES:
(*) For best performance VB and VSENSE+ should be referred to the rail whose current is being measured.
Recommended resistor gain setting combinations
Units
V
V
V
V
⍀
°C
Gain
10
20
50
100
RSHUNT
1.5k⍀
750⍀
300⍀
150⍀
RGAIN
15k⍀
15k⍀
15k⍀
15k⍀
Issue 1 - August 2007
2
© Zetex Semiconductors plc 2007
www.zetex.com
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