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CS44800 データシート(PDF) 11 Page - Cirrus Logic

部品番号 CS44800
部品情報  8-Channel Digital Amplifier Controller
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メーカー  CIRRUS [Cirrus Logic]
ホームページ  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

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DS632PP1
11
CS44800
PWM FILTER CHARACTERISTICS
(Logic “0” = GND = 0 V; Logic “1” = VLS = VLC; VD = 2.5 V; DAI_MCLK = 12.288 MHz; XTAL = 24.576 MHz; PWM
Switch Rate = 384 kHz; Fs = 32 kHz to 192 kHz; Measurement bandwidth is 10 Hz to 20 kHz unless otherwise
specified.)
12. Filter response is not production tested but is characterized and guaranteed by design.
13. XTAL = 49.152 MHz; PWM Switch Rate = 768 kHz; Fs = 96 kHz to 192 kHz.
14. The equation for the group delay through the sample rate converter with OSRATE = 0b is (8.5 / Fsi) + (10
/ Fso) ± (4.5 / Fsi). The equation for the group delay through the sample rate converter with OSRATE = 1b
is (8.5 / Fsi) + (20 / Fso) ± (4.5 / Fsi).
SWITCHING CHARACTERISTICS - XTI
(VD = 2.5 V, VDP = VLC = VLS = 3.3 V, VDX = 2.5 V to 5.0 V; Inputs: Logic 0 = GND, Logic 1 = VDX)
Parameter
Unit
Min
Typ
Max
Digital Filter Response (Note 12)
Passband
OSRATE = 0b
to -0.01 dB corner
to -3 dB corner
OSRATE = 1b (Note 13)
to -0.01 dB corner
to -3 dB corner
0
0
0
0
-
-
-
-
1.6
24.0
3.3
44.5
kHz
kHz
kHz
kHz
Frequency Response
OSRATE = 0b
10 Hz to 20 kHz
OSRATE = 1b (Note 13)
10 Hz to 40 kHz
-0.8
-1.2
-
-
+0.02
+0.02
dB
dB
Group Delay
(Note 14)
ms
De-emphasis Error
Fs = 32 kHz
(Relative to 1 kHz)
Fs = 44.1 kHz
Fs = 48 kHz
-
-
-
-
-
-
±0.23
±0.14
±0.09
dB
dB
dB
Parameter
Symbol
Min
Typ
Max
Unit
XTI period
tclki
18.518
---
40.69
ns
XTI high time
tclkih
8.34
---
22.38
ns
XTI low time
tclkil
8.34
---
22.38
ns
XTI Duty Cycle
45
50
55
%
External Crystal operating frequency
24.576
---
54
MHz
XTI
t
clkih
t
clkil
t
clki
Figure 2. XTI Timings


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