Circuit For Overvoltage Protection - Texas Instruments 2000 Series Reference Manual

Appendix G
All components must be mounted close to the RFM with the shortest possible wiring
C1: 100 nF Ceramic
C2: 100 µF low ESR
CHOKE: Common Mode Choke Coil
L1, L2, L3, L4, L5, L6: Ferrite beads
48 Over Voltage Protection
Figure G-1. Circuit for Overvoltage Protection
R1: 1 Ω / 2 W
R2, R3, R4, R5, R6, R7: 22 Ω / 0.25 W
D1: ZY18 resp. ZX18
D2, D3, D4, D5, D6, D7: BZX85C5V6
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V1: Varistor 420V e.g Siemens
S10V-520K420
SCBU022 – November 2002
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