AK2540 Datasheet, PDF (32/33 Pages) Asahi Kasei Microsystems – Quad T1 Transceiver

ASAHI KASEI
Reference current circuit
To determine input reference current, connect 12kohm±1% resistor.
R1 is recommended to connect to AK2540 as short as possible to avoid noise.
AK2540
R1
BGREF
[AK2540]
R1=12kohm±1%
Power Supply
To attenuate the power supply noise, connect capacitors between VDD and VSS respectively.
The value of the capacitance AK2540 need depend on the condition of the power supply line.
Please decide the value of the capacitance after your evaluation.
C1 is recommended to connect to AK2540 as short as possible to avoid noise.
AK2540
VDD
C1
Pin name
RAVDD-RAVSS, BVDD-BVSS, TAVDD1-TAVSS1, TAVDD2-TAVSS2
TVDD1-TVSS1, TVDD2-TVSS2, TVDD3-TVSS3, TVDD4-TVSS4,
IOVDD-IOVSS, DVDD-DVSS, PVDD-PVSS
C1
1uF
0.01uF
Recommended Transformers Selection
Power
Supply
3.3V
Operation
5V
Operation
Turns Ratio Manufacturer
1:1.14
1:2
TDK
Pulse Engineering
TDK
Pulse Engineering
JPC
Part Number
WBTT-0425B
T1104
WBTT-0425
T1105
4101
Description
Single, SMT,1.5kV
Octal, SMT,1.5kV
Single, SMT,1.5kV
Octal, SMT,1.5kV
Single, SMT,1.5kV
MS0012-E-00
32
2000/1