CS44800-CQZ Cirrus Logic Inc, CS44800-CQZ Datasheet - Page 31

• Manufacturer Part Number: CS44800-CQZ
• Description: IC,Audio Power Amplifier Controller,CMOS,QFP,64PIN
• Manufacturer: Cirrus Logic Inc
• Type: Digital Amplifier Controllerr

Specifications of CS44800-CQZ

• Applications: Automotive Systems
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1532 - BOARD EVAL FOR CS44800 PWM CTRL
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 598-1070

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