Datasheet

LTC4151
14
4151ff
For more information www.linear.com/LTC4151
Typical applicaTion
LTC4151
SCL
V
IN
48V
V
IN
SENSE
+
SENSE
–
0.2Ω
I
2
C
SDA
ADR1
ADR0
ADIN
40.2k
1%
100k AT 25°C
1%
1.5k
1%
VISHAY
2381 615 4.104
250mA
LOAD
GND
4151 TA02
Temperature Monitoring with an NTC Thermistor While
Measuring Load Current and LTC4151 Supply Current
T(°C) = 58.82 • (N
ADIN
/N
VIN
– 0.1066), 20°C < T < 60°C.
N
ADIN
AND N
VIN
ARE DIGITAL CODES MEASURED BY THE
ADC AT THE ADIN AND V
IN
PINS, RESPECTIVELY.
LTC4151-1 Monitors Current and Input Voltage of a –48V System and Interfaces with
a Microcontroller (1.5kHz Data Rate of I
2
C is Limited by Slew Rate of Opto-Isolators)
4151 TA04
3.3V
R
S
0.02Ω
µ-CONTROLLER
GND
LTC4151-1
SCL
SCL
RTN
–48V
V
IN
V
DD
V
ADIN
SDAI
ADIN
ADR1
R5
0.51k
R6
10k
R7
10k
R4
0.51k
R1
20k
R2
20k
R3
5.1k
18
27
36
45
81
72
63
54
SDA
ADR0
GND
SENSE
+
SENSE
–
SDA0
MOCD207M
MOCD207M