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ADM2485BRWZ Datasheet(PDF) 8 Page - Analog Devices

No. de pieza ADM2485BRWZ
Descripción Electrónicos  High Speed Isolated RS-485 Transceiver with Integrated Transformer Driver
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Fabricante Electrónico  AD [Analog Devices]
Página de inicio  http://www.analog.com
Logo AD - Analog Devices

ADM2485BRWZ Datasheet(HTML) 8 Page - Analog Devices

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ADM2485
Preliminary Technical Data
TEST CIRCUITS
VOC
R
VOD
A
B
RLDIFF
R
CL1
CL2
Figure 3. Driver Voltage Measurement
Figure 7. Driver Propagation Delay
375
Ω
VDD1
GND1
A
B
150
Ω
50pF
DE OUT
60
Ω
VOD3
VTST
375
Ω
RTS
TxD
Figure 4. Driver Voltage Measurement
RxD
RE
150
Ω
A
B
VDD2
GND2
DE OUT
RTS
TxD
RxD
RE
VDD2
GND2
Figure 8. RTS to DE OUT Propagation Delay
VCC
195
Ω
A
110
Ω
110
Ω
S2
TxD
S1
50pF
VOUT
195
Ω
B
RTS
VDD1
GND1
VDD2
GND2
Figure 9. Driver Enable/Disable
Figure 5. Supply-Current Measurement Test Circuit
A
RE
A
B
RTS
TxD
RxD
GND2
2.2k
Ω
100nF
100nF
VCM(HF)
470nF
RECEIVE
ENABLE
195
Ω
110
Ω
195
Ω
VDD2
GND2
DE OUT
VOUT
B
CL
Figure 10. Receiver Propagation Delay
FTEST,
50
Ω
110nF VHF
50
Ω
22k
Ω
VCC
VOUT
RL
CL
+1.5V
–1.5V
S1
RE
RE IN
VDD1
GND1
VDD2
GND2
VTEST2
S2
Figure 6. High Frequency Common-Mode Noise Test Circuit
Figure 11. Receiver Enable/Disable
Rev. PrK | Page 8 of 15


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