Pwm Filter Characteristics; Switching Characteristics - Xti; Figure 2.Xti Timings - Cirrus Logic CS44800 Manual

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.)
Digital Filter Response
Passband
OSRATE = 0b
OSRATE = 1b (Note 13)
OSRATE = 0b
OSRATE = 1b (Note 13)
Group Delay
De-emphasis Error
(Relative to 1 kHz)
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
XTI period
XTI high time
XTI low time
XTI Duty Cycle
External Crystal operating frequency
DS632F1
Parameter
(Note 12)
to -0.01 dB corner
to -3 dB corner
to -0.01 dB corner
to -3 dB corner
Frequency Response
10 Hz to 20 kHz
10 Hz to 40 kHz
Fs = 44.1 kHz
XTI
t
clkih
Figure 2. XTI Timings
Min
0
0
0
0
-0.8
-1.2
Fs = 32 kHz -
-
Fs = 48 kHz -
Symbol Min
t 18.518
clki
t 8.34
clkih
t 8.34
clkil
45
24.576
t
clkil
t
clki
CS44800
Typ Max
- 1.6
- 24.0
- 3.3
- 44.5
- +0.02
- +0.02
(Note 14)
- ±0.23
- ±0.14
- ±0.09
Typ Max
--- 40.69
--- 22.38
--- 22.38
50 55
--- 54
Unit
kHz
kHz
kHz
kHz
dB
dB
ms
dB
dB
dB
Unit
ns
ns
ns
%
MHz
11