LT6105
20
6105fa
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LINEAR TECHNOLOGY CORPORATION 2007
LT 0408 REV A PRINTED IN USA
RELATED PARTS
TYPICAL APPLICATION
PART NUMBER
DESCRIPTION
COMMENTS
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Precision, Bidirectional, High Side Current Sense Amplier
2.7V to 60V Operation, 75μV Offset, 60μA Current Draw
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Indicates Charge Quantity and Polarity
LT6100
Gain-Selectable High Side Current Sense Amplier
4.1V to 48V Operation, Pin-Selectable Gain: 10V/V, 12.5V/V, 20V/V,
25V/V, 40V/V, 50V/V
LTC6101/
LTC6101HV
High Voltage High Side Current Sense Amplier
4V to 60V/5V to 100V Operation, External Resistor Set Gain, SOT23
LTC6102/
LTC6102HV
Zero Drift High Side Current Sense Amplier
4V to 60V/5V to 100V Operation, ±10μV Offset, 1μs Step Response,
MSOP8 / DFN
LTC6103
Dual High Side Precision Current Sense Amplier
4V to 60V, Gain Congurable, 8-Pin MSOP
LTC6104
Bidirectional High Side Precision Current Sense Amplier
4V to 60V, Gain Congurable, 8-Pin MSOP
LT6106
Low Cost, High Side Precision Current Sense Amplier
2.7V to 36V, Gain Congurable, SOT23
–
+
6105 F07
LT6105
V–
V+
TO –15V
LOAD
–15V
NEGATIVE
SUPPLY
100Ω
1%
–IN
+IN
4.99k
1%
100Ω
1%
VOUT = 1V/A
VOUT
5VDC
–
+
20mΩ
1%
CURRENT FLOW
LT6105
V –
V+
TO +15V
LOAD
–15V
+15V
POSITIVE
SUPPLY
100Ω
1%
–IN
+IN
4.99k
1%
100Ω
1%
VOUT = 1V/A
VOUT
5VDC
20mΩ
1%
CURRENT FLOW
Figure 7. The LT6105 Can Monitor the Current of Either Positive
or Negative Supplies, Without a Schematic Change. Just Ensure
That the Current Flow Is in the Correct Direction
Supply Monitoring
The input common mode range of the LT6105 also makes
it suitable for monitoring either positive or negative sup-
plies. Figure 7 shows one LT6105 applied as a simple
positive supply monitor, and another LT6105 as a simple
negative supply monitor. Note that the schematics are
practically identical and both have outputs conveniently
referred to ground. The only requirement for negative
supply monitoring, in addition to the usual constraints of
the absolute maximum ratings, is that the negative supply
to that LT6105 be at least as negative as the supply it is
monitoring.