isl28005 Intersil Corporation, isl28005 Datasheet

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isl28005

Manufacturer Part Number
isl28005
Description
Micropower, Rail-to-rail Input Current Sense Amplifier With Voltage Output
Manufacturer
Intersil Corporation
Datasheet

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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.
Typical Application
February 3, 2010
FN6973.1
POWER SUPPLY
MULTIPLE
OUTPUT
+1.0VDC
+12VDC
+5VDC
SENSE
SENSE
SENSE
GND
R
R
R
SENSE
SENSE
SENSE
1
+
+
ISL28005
ISL28005
+
ISL28005
-
-
-
+5VDC
+5VDC
+5VDC
1-888-INTERSIL or 1-888-468-3774
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
+12VDC
OUTPUT
+12VDC
OUTPUT
I
+5VDC
+1.0VDC
+1.0VDC
OUTPUT
+5VDC
I
SENSE
I
SENSE
SENSE
Features
• Low Power Consumption . . . . . . . . . . . 50µA,Typ
• Supply Range. . . . . . . . . . . . . . . . . . 2.7V to 28V
• Wide Common Mode Input . . . . . . . . . 0V to 28V
• Fixed Gain Versions
• 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
High-Side And Low-Side
Threshold Voltage
- ISL28005-100 . . . . . . . . . . . . . . . . . . . 100V/V
- ISL28005-50. . . . . . . . . . . . . . . . . . . . . 50V/V
- ISL28005-20. . . . . . . . . . . . . . . . . . . . . 20V/V
All other trademarks mentioned are the property of their respective owners.
|
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
Intersil (and design) is a registered trademark of Intersil Americas Inc.
0
0
V
RS+
Copyright Intersil Americas Inc. 2009, 2010. All Rights Reserved
0.2
0.4
0.6
V
V
TH(L-H)
OUT
G100, V
G50, V
G20, V
(see page 13)
V
0.8
TH(H-L)
(G=100)
TIME (ms)
OUT
OUT
= 1.52V
OUT
1.0
= 500mV
= 200mV
= 1.23V
= 1V
1.2
1.4
1.6
1.8
2.0

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