Datasheet

Configuring the Board

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Figure 3. Jumper Configuration For USB Power Supply

7.3 Configuring the Reference Inputs

The CDCM62008 offers two inputs (PRI_REF and SEC_REF). SMA J18 and J19 are dedicated for

PRI_REF (IN1p and IN1n) and SMA J20 and J21 are dedicated for SEC_REF (1N2p and 1N2n). Both

inputs in the EVM are AC-coupled, by default, using coupling capacitors (C25 and C26 for PRI_REF and

C29 and C30 for SEC_REF). CDCM6208 does NOT have any internal termination or biasing; so, external

biasing is required after AC coupling. Headers JMP10 and JPM11 provide the options for PRI_REF input

biasing and SEC_REF input biasing, respectively. Depending on the input signaling level and power

supply selection, proper biasing must be selected, see Table 1.

CDCM6208 Evaluation Board SCAU049A–May 2012–Revised January 2013

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