ADM2485 查看數據表（PDF） - Analog Devices
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ADM2485 Datasheet PDF : 20 Pages
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ADM2485
TYPICAL PERFORMANCE CHARACTERISTICS
2.40
2.35
2.30
IDD1_RE_ENABLE_VDD1 = 5.5V
2.25
2.20
2.15
2.10
2.05
IDD2_DE_ENABLE_VDD1 = 5.5V
2.00
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
Figure 7. Unloaded Supply Current vs. Temperature
5.0
4.5
IDD1_PROFIBUS LOAD_TxD = 16Mbps_VDD1 = 5.00V
4.0
3.5
IDD1_NO LOAD_TxD = 16Mbps_VDD1 = 5.00V
3.0
IDD1_PROFIBUS LOAD_TxD = 2Mbps_VDD1 = 5.00V
2.5
2.0
1.5
IDD1_NO LOAD_TxD = 2Mbps_VDD1 = 5.00V
1.0
0.5
0
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
Figure 8. Logic Side Supply Current (IDD1 = 1 mA) vs. Temperature
60
IDD2_ PROFIBUS LOAD_TxD = 16Mbps_VDD2 = 5.00V
50
40 IDD2_PROFIBUS LOAD_TxD = 2Mbps_VDD2 = 5.00V
30
20
IDD2_NO LOAD_TxD = 16Mbps_VDD2 = 5.00V
10
IDD2_NO LOAD_TxD = 2Mbps_VDD2 = 5.00V
0
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
Figure 9. Bus Side Supply Current (IDD2 = 2 mA) vs. Temperature
60
50
tPLHA
tPHLB
40
tPLHB
tPHLA
30
20
10
0
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
Figure 10. Driver Propagation Delay vs. Temperature
60
Rx PROP DELAY, tPLH_VDD2 = 5.00V
50
40 Rx PROP DELAY, tPHL_VDD2 = 5.00V
30
20
10
0
–40
–20
0
20
40
60
80
TEMPERATURE (°C)
Figure 11. Receiver Propagation Delay vs. Temperature
DI
3
B
A
2
CH1 2.0V Ω CH2 2.0V Ω M20.0ns 1.25GS/s A CH3 2.60V
CH3 2.0V Ω
IT 8.0ps/pt
Figure 12. Driver/Receiver Propagation Delay, Low to High
(RLDIFF = 54 Ω, CL1 = CL2 = 100 pF)
Rev. A | Page 10 of 20
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