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CDB4361 Datasheet(PDF) 5 Page - Cirrus Logic

Part No. CDB4361
Description  Evaluation Board for CS4361
Download  26 Pages
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Maker  CIRRUS [Cirrus Logic]
Homepage  http://www.cirrus.com
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CDB4361 Datasheet(HTML) 5 Page - Cirrus Logic

 
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DS672DB2
5
CDB4361
6. ANALOG OUTPUT FILTERING
The analog output on the CDB4361 has been designed according to the CS4361 datasheet. This output circuit in-
cludes an AC coupling cap and a single pole R and C. An additional load resistance may be added by shunting J23,
J24, J38, J39, J42, and J43 to test the CS4361’s load-driving capability. See Figure 44 on page 20 for more details.
7. OPTIONAL MUTE CIRCUITRY
The CDB4361 contains the optional, recommended mute circuitry for the CS4361. This circuitry is designed to min-
imize the potential for clicks and pops. In order for this circuitry to operate properly, a negative supply is required.
This supply is provided by U18. See Figure 45 on page 21 for more details.
Table 1. System Connections
CONNECTOR
INPUT/OUTPUT
SIGNAL PRESENT
+5 V
Input
+ 5 V power
GND
Input
Ground connection from power supply
S/PDIF INPUT - J1
Input
Digital audio interface input via coax
S/PDIF INPUT - OPT1
Input
Digital audio interface input via optical
PCM INPUT - J37
Input
Input for master, serial, left/right clocks and serial data
AOUT1 - 6
Output
RCA line level analog outputs
JUMPER /
SWITCH
PURPOSE
POSITION
FUNCTION SELECTED
J46
Selects source of voltage for
the CS4361 VA supply
+3.3 V
*+5 V
Voltage source is a +3.3 V regulator
Voltage source is +5 V binding post
J17
Provides contact points to
measure VA current
-
Measure voltage across these nodes and divide result by 10 to
get current in amps
J45
Selects source of voltage for
the CS4361 VL supply
+3.3 V
*+5 V
Voltage source is a +3.3 V regulator
Voltage source is +5 V binding post
J20
Provides contact points to
measure VL current
-
Measure voltage across these nodes and divide result by 10 to
get current in Amps
J52
CS4361 Mode Select
*I2S
LJ
RJ16
RJ24
Sets the mode of the CS4361 by placing a shunt across the
desired setting
J63
Global Mute Enable
*shunted
open
Connects the CS4361 MUTEC pin to the mute circuitry
Disconnect for VA power-down current measurements
J53, J54
J55, J56
J57, J58
Mute Enable
*shunted
open
When shunted, the mute circuit is active
When open, the mute circuit is inactive
J24, J23
J39, J38
J43, J42
AC Load
shunted
*open
When shunted, a 3 k
Ω AC load is added to the output
Leave open for normal operation
S1
Resets CS4361 and CS8416
The CS8416 must be reset if switch S2 is changed
S2
SDIN Control
*All closed
All open
Connects SDIN1 to SDIN2 and SDIN3
SDIN1, 2, and 3 are discrete


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