CDB43L43 Cirrus Logic Inc, CDB43L43 Datasheet - Page 5

• Manufacturer Part Number: CDB43L43
• Description: Audio Modules & Development Tools Eval Bd LP DAC w/Head phn.&Ln Amp
• Manufacturer: Cirrus Logic Inc

Specifications of CDB43L43

• Product: Audio Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8. GROUNDING AND POWER SUPPLY
The CS43L43 requires careful attention to power
supply and grounding arrangements to optimize
performance. Figure 9 details the power distribu-
tion used on this board. The decoupling capacitors
are located as close to the CS43L43 as possible.
Extensive use of ground plane fill on both the ana-
log and digital sections of the evaluation board
yields large reductions in radiated noise.
9. CONTROL PORT SOFTWARE
The CDB43L43 is shipped with Windows based
software for interfacing with the CS43L43 control
port via the serial connector, J1. The software can
be used to communicate with the CS43L43 in I
mode.
Note:
10. POPGUARD
The CDB43L43 Rev A includes a hardware im-
provement for the PopGuard
feature of the CS43L43 Rev G. The additional
hardware includes Q1, Q2 and R24. Please refer to
Figure 3. To bypass this hardware improvement,
stuff R18 and R19 with 0 ohm resistors and change
R25 and R26 to 1 k ohm resistors.
DS479DB2
DECOUPLING
DIP 2-4 must be set appropriately for control
port mode operation.
®
IMPROVEMENT
®
Transient Control
2
C
11. CDB43L43 PERFORMANCE PLOTS
The CDB43L43 Rev A performance plots shown in
Figures 13 through 18 were generated using an Au-
dio Precision System Two Cascade with the S2-
AES17LP 20 kHz brickwall filter applied. All tests
were performed at a sampling rate of 48 kHz and
with VL, VA, and VA_HP set to the indicated volt-
age supply.
12. CDB43L43 REV A ERRATA
1) R20 and R30 have been stuffed with 0 ohm re-
2) The DIP switch has been turned such that the
3) R31 has been changed from a pull-up to a pull-
4) A 1 Mohm pull-down has been added to U10
The CDB43L43 was also modified to reflect the
changes made to the CS43L43 in Revision G. The
second circuit in Figure 3, page 8 of this datasheet
was removed, and the CS43L43 Revision G is
mounted on the CDB43L43 for evaluation.
sistors and 47 kohm pull-downs have been add-
ed to pins 3 and 28 of U4.
“open” position is denoted by the “1” on the
board.
down.
pin 8, located near R24.
CDB43L43
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