adm2486 Analog Devices, Inc., adm2486 Datasheet - Page 10

• Manufacturer Part Number: adm2486
• Description: High Speed, Half-duplex Icoupler Isolated Rs-485 Transceiver
• Manufacturer: Analog Devices, Inc.

ADM2486
TEST CIRCUITS
V
GND
CM(HF)
2.2kΩ
2
RTS
RxD
RECEIVE
TxD
ENABLE
RE
Figure 6. High Frequency Common-Mode Noise Test Circuit
RTS
RxD
TxD
V
Figure 5. Supply-Current Measurement Test Circuit
DD1
V
DD1
100nF
Figure 3. Driver Voltage Measurement
Figure 4. Driver Voltage Measurement
GND
GND
1
1
V
V
OD3
DD2
V
OD
100nF
60Ω
V
DD2
375Ω
375Ω
GND
B
A
2
GND
R
R
GND
V
DE
DD2
110Ω
195Ω
195Ω
V
2
2
TEST
470nF
V
A
B
150Ω
OC
DE
GND
V
DD2
195Ω
110Ω
195Ω
50Ω
50Ω
2
V
TEST2
110nF
22kΩ
F
Rev. D | Page 10 of 20
TEST
V
HF
,
RTS
RxD
TxD
RE
TxD
RTS
V
+1.5V
–1.5V
DD1
RE IN
S1
A
B
Figure 8. RTS-to-DE Propagation Delay
Figure 10. Receiver Propagation Delay
GND
Figure 7. Driver Propagation Delay
Figure 11. Receiver Enable/Disable
Figure 9. Driver Enable/Disable
1
RE
A
B
B
A
RE
S1
V
C
DD2
C
R
L
LDIFF
50pF
L
V
GND
OUT
V
OUT
R
L
V
2
C
C
OUT
110Ω
L1
L2
DE
A
B
150Ω
V
CC
V
S2
CC
S2
50pF