Cirrus Logic CS42L73 - Manual (Page 25)

DS882F1 25
CS42L73
THERMAL OVERLOAD DETECT CHARACTERISTICS
Test Conditions: Connections to the CS42L73 are shown in the “Typical Connection Diagram” on page 17 ; GND = AGND =
PGND = CPGND = DGND = 0 V; all voltages are with respect to ground (GND); VA = 1.80 V.
Notes:
23. The thermal overload detect threshold temperature level can vary from the nominal value by ±10 °C.
ASRC DIGITAL FILTER CHARACTERISTICS
Test Conditions (unless otherwise specified): Fs = 48 kHz (Note 10) ; Fs
ext
= 48 kHz (Note 24) .
Notes:
24. Fs
ext
is the sample rate of the serial port (XSP, ASP, or VSP) interface.
25. Refer to Response plots in Figures 53 and 54 on page 129 .
26. The equations for the group delay through the sample rate converters are:
• Input (from the serial ports to the core): 6.9/Fs
ext
+ 3.0/Fs
• Output (from the core to the serial ports): 2.6/Fs
ext
+ 14.1/Fs.
A plot of ASRC group delay values for the extreme supported internal sample rates (Fs) and standard audio sample
rates is found in section
“Group Delay” on page 130 .
Parameters Min Typ Max Units
Thermal Overload Detect Threshold Characteristics
Threshold Junction Temperature (T
J
) (Note 23) THMOVLD_THLD[1:0] = 00b
THMOVLD_THLD[1:0] = 01b
THMOVLD_THLD[1:0] = 10b
THMOVLD_THLD[1:0] = 11b
-
-
-
- 150
132
115
98
-
-
-
- °C
°C
°C
°C
Parameters (Note 2) (Note 25) Min Typ Max Units
Low-Pass Filter Characteristics (Note 24)
Frequency Response (0 Hz to 20 kHz) -0.07 - +0.04 dB
Passband to -0.05 dB corner
to -3.0 dB corner
-
- 0.48
0.50 -
- Fs
ext
Stopband 0.55 - - Fs
ext
Stopband Attenuation 125 - - dB
Total ASRC Group Delay - (Note 26) - s