Cirrus Logic CDB4244 - Manual (Page 6)

6 DS900DB2
CDB4244
1.9 Analog Inputs
The CDB4244 can accept single-ended analog input signals through the RCA phono jacks on each channel.
An active single-ended-to-differential input filter network converts the single-ended input into a differential
signal before the signal is passed to the respective differential analog inputs of the CS4244.
Space for a passive differential filter option allows differential analog input signals to be connected directly
to the CDB4244. Stereo 1/8” audio jacks are provided to support this option; however, the components used
to populate this filter option must be obtained separately. With either filter option, analog input signals are
AC-coupled to the CS4244.
Refer to Section 4 starting on page 15 for details on the implementation of either input filter.
1.10 Analog Outputs
The CDB4244 provides differential analog outputs through the stereo 1/8” audio jacks on each output chan-
nel. While a passive filter network is populated on each output channel by default, each channel has space
for an optional active differential filter network.
Both the active and passive differential filter options can be converted to provide single-ended outputs by
removing certain components from the board. A fifth filter option provides space for an active differential-to-
single-ended filter, which can convert the differential analog outputs of the CS4244 into a single-ended sig-
nal. RCA phono jacks are provided to support these options. The components used to populate any of the
three active output filter options available for each channel must be obtained separately.
Refer to Section 5 starting on page 17 for details on the implementation of each output filter.