PEB 2091
PEF 2091
Application Hints
Note 72: The three 22 nF capacitors can be replaced by one 33 nF capacitor in the
middle. However, the solution with the three capacitors can absorb
longitudinal disturbances in a better way.
To improve transmission performance the following recommendations should be
considered in circuit design:
• All capacitors of the hybrid should be MKT. Ceramic capacitors are not recommended
• Do not cross hybrid or XTAL with clock lines
• Analog lines between transformer and chip should be symmetric and close together
so that noise is inducted symmetrically
• Hybrid layout should be symmetric
• If possible there should be a ground plane underneath the IEC-Q
• Blocking of VDD according to recommendation and as close as possible to device
(see also "Power Supply Blocking Recommendation", page 249).
• Tolerances
Resistors: 1%
6.8 nF:
22 nF:
5%
5%
Semiconductor Group
251
Data Sheet 01.99
INFINEON [ Infineon ]
