CDB4365 Cirrus Logic Inc, CDB4365 Datasheet - Page 5

• Manufacturer Part Number: CDB4365
• Description: EVALUATION BOARD FOR CS4365
• Manufacturer: Cirrus Logic Inc

Specifications of CDB4365

• Number Of Dac's: 6
• Number Of Bits: 24
• Outputs And Type: 6, Differential
• Sampling Rate (per Second): 192k
• Data Interface: Serial
• Dac Type: Voltage
• Voltage Supply Source: Analog and Digital
• Operating Temperature: -40°C ~ 85°C
• Utilized Ic / Part: CS4365
• Description/function: Audio D/A
• Operating Supply Voltage: 5 V
• Product: Audio Modules
• For Use With/related Products: CS4365
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
• Other names: 598-1779

DS670DB3
source, remove the shunts on J15 and place a ribbon cable so the signal lines are on the center row and the grounds
are on the right side. R116 and R119 should be populated with 2-kΩ resistors when using an external I²C source
that does not already provide pull-ups.
5. POWER SUPPLY CIRCUITRY
Power is supplied to the evaluation board by four binding posts: GND, +5V, +12V, and -12V (See
‘+5V’ terminal supplies VA and the rest of the +5-V circuitry on the board. The +3.3-V circuitry is powered from a
regulator. The +2.5 volts required for VD is also provided from an on-board regulator. The +5-V supply should be
set within the recommended values for VA stated in the CS4365 datasheet.
WARNING: Refer to the CS4365 datasheet for maximum allowable voltage levels. Operation outside this range can
cause permanent damage to the device.
6. GROUNDING AND POWER SUPPLY DECOUPLING
As with any high-performance converter, the CS4365 requires careful attention to power supply and grounding ar-
rangements to optimize performance.
show the component placement and top and bottom layout. The decoupling capacitors are located as close to the
CS4365 as possible. Extensive use of ground plane fill in the evaluation board yields large reductions in radiated
noise.
7. ANALOG OUTPUT FILTERING
The analog output on the CDB4365 has been designed according to the CS4365 datasheet. This output circuit in-
cludes an active 2-pole, 50-kHz filter which uses the multiple-feedback topology.
S/PDIF IN - OPT1
PCM INPUT - J11
DSD INPUT - J7
CONNECTOR
S/PDIF IN - J9
OUTA1-B3
+12V
GND
-12V
+5V
INPUT/OUTPUT
Output
Input
Input
Input
Input
Input
Input
Input
Input
Figure 44
Table 1. System Connections
Digital audio interface input via coax
+ 5 V power
Ground connection from power supply
+12 V positive supply for the on-board filtering
-12 V negative supply for the on-board filtering
Digital audio interface input via optical
Input for master, serial, left/right clocks and serial data
Input for DSD serial clock and DSD data
RCA line level analog outputs
details the connections to the CS4365 and
SIGNAL PRESENT
Figures
Figure
53, 54, and
CDB4365
52). The
55
5