AK2540 Datasheet, PDF (31/33 Pages) Asahi Kasei Microsystems – Quad T1 Transceiver

ASAHI KASEI
RECOMMENDED EXTERNAL CIRCUITS
Transmit Circuit
AK2540
TTIPx
VDD
C1
VDD
1:2 (3.3V)
1:1.14 (5V)
TRINGx
Received Circuit
AK2540
Rp
RTIPx
C1=0.47µF
1:1 (3.3V)
1:0.57 (5V)
R1
[AK2540]
R2
RRINGx
Rp
R1=R2= 50ohms (3.3V)
154ohms (5V)
Rp=100ohms(Protection resistance, Example value)
Recommended Transformer Specification
VDD = 3.3V
Tx
Rx
VDD = 5V
Tx
Rx
Turns
Ratio
(Typ)
1:2
1:2(CT)
Primary
Inductance
(Min)
1.5mH
1.5mH
Leakage
Inductance
(Max)
0.3uF
0.3uF
Turns
Ratio
(Typ)
1:1.14
1:1.14(CT)
Primary
Inductance
(Min)
1.5mH
1.5mH
Leakage
Inductance
(Max)
0.3uF
0.3uF
Interwinding DCR
Capacitance (Max)
(Max)
pri
sec
30pF
30pF
0.6ohms 0.6ohms
0.6ohms 0.6ohms
Interwinding DCR
Capacitance (Max)
(Max)
pri
sec
30pF
30pF
0.6ohms 0.6ohms
0.6ohms 0.6ohms
MS0012-E-00
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