CS5376A
loopback testing expects 512 kHz ∆Σ data for the
MDATA inputs.
A mismatch of the TBS generator full scale output
and the MDATA full scale input results in an am-
plitude mismatch when testing in loopback mode.
The TBS generator outputs a 75% maximum one’s
density, while the MDATA inputs expect an 86%
maximum one’s density from a ∆Σ modulator, re-
sulting in a measured full scale error of -3.6 dB.
17.8 TBS Synchronization
When the TSYNC bit is set in the TBSCFG regis-
ter, the MSYNC signal resets the sine wave data
pointer and phase aligns the TBS signal output.
Once the digital filter is settled, all CS5376A de-
vices receiving the SYNC signal will have identical
TBS signal phase. See “Synchronization” on
page 25 for more information about the SYNC and
MSYNC signals.
If TSYNC is clear, MSYNC has no effect on the
TBS data pointer and no change in the TBS output
phase will occur during synchronization.
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