LTC4307 View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC4307' PDF : 16 Pages View PDF
LTC4307
APPLICATIONS INFORMATION
Systems with Supply Voltage Droop
In large 2-wire systems, the VCC voltages seen by devices
at various points in the system can differ by a few hundred
millivolts or more. This situation is modeled by a series
resistor in the VCC line, as shown in Figure 8. For proper
operation, make sure that the VCC(LTC4307) is ≥ 2.3V.
3.3V
SDA1
SCL1
R1 R2 R3
10k 10k 10k
C1
0.01μF
VCC
LTC4307
ENABLE
READY
SDAIN SDAOUT
SCLIN SCLOUT
GND
R4 R5
10k 10k
C2
0.01μF
R6
R7 R8
10k
VCC
10k 10k
LTC4307
ENABLE
READY
SDAIN SDAOUT
SDA2
SCLIN SCLOUT
SCL2
GND
4307 F06
Figure 6. The LTC4307 in a Repeater/Bus Extender Application Where Two 2-Wire Systems are Separated by a Distance
VCC
SDA1
SCL1
R1 R2
2.7k 2.7k
C1
0.01mF
R3
10k
VCC
LTC4307
ENABLE
READY
SDAOUT SDAIN
SCLOUT SCLIN
GND
C2
C3
R4 R5
R6
2.7k 2.7k 10k
0.01mF
R7 R8 R9
VCC
2.7k 2.7k 10k
0.01mF
R10 R11
2.7k 2.7k
VCC
LTC4307
LTC4307
ENABLE
ENABLE
READY
READY
SDAIN SDAOUT
SCLIN SCLOUT
SDAIN SDAOUT
SCLIN SCLOUT
SDA2
SCL2
GND
GND
4307 F07
Figure 7. The LTC4307 in a Repeater Application. The LTC4307’s Low Offset Allows Cascading of Multiple Devices
12
VCC(BUS)
READY
SDA1
SCL1
RDROOP
R1 R2
R3
10k 10k 10k
VCC(LTC4307)
C1
0.01μF
R4 R5
10k 10k
VCC
LTC4307
ENABLE
READY
SDAIN SDAOUT
SCLIN SCLOUT
GND
SDA2
SCL2
4307 F08
Figure 8. System with Voltage Droop
4307f
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