CDB44800 Cirrus Logic Inc, CDB44800 Datasheet - Page 31
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CDB44800
Manufacturer Part Number
CDB44800
Description
BOARD EVAL FOR CS44800 PWM CTRL
Manufacturer
Cirrus Logic Inc
Series
Popguard®r
Specifications of CDB44800
Amplifier Type
Class D
Output Type
8-Channel
Voltage - Supply
20 V ~ 50 V
Operating Temperature
-10°C ~ 70°C
Board Type
Fully Populated
Utilized Ic / Part
CS44800
Description/function
Audio DSPs
Operating Supply Voltage
5 V
Product
Audio Modules
For Use With/related Products
CS44800
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Max Output Power X Channels @ Load
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
598-1532
CDB-44800
CDB-44800
DS632F1
4.4.2
4.4.3
Auto Rate Detect
The CS44800 will automatically determine the incoming sample rate, DAI_LRCK, to master clock,
DAI_MCLK, ratio and configure the appropriate internal clock divider such that the sample rate convertor
receives the required clock rate. A minimum DAI_MCLK rate of 128Fs is required for proper operation.
The supported DAI_MCLK to DAI_LRCK ratios are shown in
De-Emphasis
The CS44800 includes on-chip digital de-emphasis filters. The de-emphasis feature is included to accom-
modate older audio recordings that utilize pre-emphasis equalization as a means of noise reduction.
Figure 23
portionally with changes in sample rate, Fs. The required de-emphasis filter for 32 kHz, 44.1 kHz, or
48 kHz is selected via the de-emphasis control bits in
shows the de-emphasis curve. The frequency response of the de-emphasis curve will scale pro-
-10dB
Gain
0dB
dB
Figure 23. De-Emphasis Curve
3.183 kHz
T1=50 µs
F1
10.61 kHz
“Misc. Configuration (address 04h)” on page
F2
T2 = 15 µs
Table 1 on page
Frequency
26.
CS44800
52.
31