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ISL28005 Datasheet(PDF) 1 Page - Intersil Corporation

Part No. ISL28005
Description  Micropower, Rail-to-Rail Input Current Sense Amplifier
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Maker  INTERSIL [Intersil Corporation]
Homepage  http://www.intersil.com/cda/home
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ISL28005 Datasheet(HTML) 1 Page - Intersil Corporation

 
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Micropower, Rail-to-Rail Input Current Sense Amplifier
with Voltage Output
ISL28005
The ISL28005 is a micropower, uni-directional high-side and low-
side current sense amplifier featuring a proprietary rail-to-rail
input current sensing amplifier. The ISL28005 is ideal for high-
side current sense applications where the sense voltage is
usually much higher than the amplifier supply voltage. The
device can be used to sense voltages as high as 28V when
operating from a supply voltage as low as 2.7V. The micropower
ISL28005 consumes only 50µA of supply current when operating
from a 2.7V to 28V supply.
The ISL28005 features a common-mode input voltage range
from 0V to 28V. The proprietary architecture extends the input
voltage sensing range down to 0V, making it an excellent choice
for low-side ground sensing applications. The benefit of this
architecture is that a high degree of total output accuracy is
maintained over the entire 0V to 28V common mode input
voltage range.
The ISL28005 is available in fixed (100V/V, 50V/V and 20V/V)
gains in the space saving 5 Ld SOT-23 package. The parts
operate over the extended temperature range from -40°C to
+125°C.
Features
• Low Power Consumption. . . . . . . . . . . . . . . . . . . . . . 50µA,Typ
• Supply Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2.7V to 28V
• Wide Common Mode Input. . . . . . . . . . . . . . . . . . . . 0V to 28V
• Fixed Gain Versions
- ISL28005-100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100V/V
- ISL28005-50 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50V/V
- ISL28005-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20V/V
• Operating Temperature Range. . . . . . . . . . .-40°C to +125°C
• Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Ld SOT-23
Applications
• Power Management/Monitors
• Power Distribution and Safety
• DC/DC, AC/DC Converters
• Battery Management /Charging
• Automotive Power Distribution
Related Literature
• See AN1531 for “ISL28005 Evaluation Board User’s Guide”
ISL28005
GND
ISL28005
ISL28005
+5VDC
+12VDC
+
-
+1.0VDC
+1.0VDC
SENSE
SENSE
SENSE
OUTPUT
+5VDC
OUTPUT
+12VDC
OUTPUT
MULTIPLE
OUTPUT
POWER SUPPLY
ISENSE
+12VDC
ISENSE
+5VDC
ISENSE
+1.0VDC
+
-
+
-
RSENSE
+5VDC
+5VDC
+5VDC
RSENSE
RSENSE
FIGURE 1. TYPICAL APPLICATION
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
0
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
TIME (ms)
VTH(L-H) = 1.52V
VTH(H-L) = 1.23V
VRS+
G100, VOUT = 1V
G50, VOUT = 500mV
G20, VOUT = 200mV
VOUT (G=100)
FIGURE 2. HIGH-SIDE AND LOW-SIDE THRESHOLD VOLTAGE
July 1, 2011
FN6973.4
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|Copyright Intersil Americas Inc. 2009-2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries.
All other trademarks mentioned are the property of their respective owners.


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