LTC4151-1 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC4151-1' PDF : 16 Pages View PDF
APPLICATIONS INFORMATION
and each of the following (if more) data bytes, as in a
Read Page command, the LTC4151/LTC4151-1 will keep
sending out each data byte in the register that corresponds
to the incrementing register pointer. The read operation
terminates and the register address pointer resets to 00h
when the master sends a Stop condition.
Layout Considerations
A Kelvin connection between the sense resistor RS and
the LTC4151/LTC4151-1 is recommended to achieve ac-
curate current sensing (Figure 10). The minimum trace
width for 1oz copper foil is 0.02" per amp to make sure
the trace stays at a reasonable temperature. Using 0.03"
per amp or wider is recommended. Note that 1oz copper
exhibits a sheet resistance of about 530μΩ per square.
LTC4151/LTC4151-1
VIN
RS
ILOAD
SENSE+
SENSE–
VIN
GND
LTC4151
ADR1
ADR0
GND
ILOAD
41511 F10
Figure 10. Recommended Layout for Kelvin Connection
TYPICAL APPLICATION
Temperature Monitoring with an NTC Thermistor While
Measuring Load Current and LTC4151 Supply Current
VIN
48V
VISHAY
2381 615 4.104
100k AT 25°C
1%
40.2k
1%
1.5k
1%
0.2Ω
SENSE+ SENSE–
VIN
SCL
ADIN
LTC4151
SDA
ADR1
GND
ADR0
41511 TA02
250mA
LOAD
I2C
T(°C) = 58.82 × (NADIN /NVIN – 0.1066), 20°C < T < 60°C.
NADIN and NVIN are digital codes measured by the ADC at the
ADIN and VIN pins, respectively.
41511fa
13
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