CS8421-CNZR View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'CS8421-CNZR' PDF : 36 Pages View PDF
DIGITAL FILTER CHARACTERISTICS
CS8421
Parameter
Passband (Upsampling or Downsampling)
Passband Ripple
Stopband
Stopband Attenuation
Group Delay
Min
-
-
0.5465*Fso
125
SRC Mode
-
Bypass Mode
-
Typ
-
-
-
-
(Note 3)
-
Max Units
0.4535*Fso Hz
±0.007
dB
-
Hz
-
dB
-
s
3/Fsi
s
3. The equation for the group delay through the sample-rate converter is (56.581 / Fsi) + (55.658 / Fso).
For example, if the input sample rate is 192 kHz and the output sample rate is 96 kHz, the group delay
through the sample-rate converter is (56.581/192,000) + (55.658/96,000) =.875 milliseconds.
DC ELECTRICAL CHARACTERISTICS
(GND = 0 V; all voltages with respect to 0 V.)
Parameters
Symbol Min Typ Max Units
Power-Down Mode (Note 4)
Supply Current in power-down
(Oscillator attached to XTI-XTO)
VD
VL = 3.3 V
VL = 5.0 V
50
μA
100
μA
200
μA
Supply Current in power-down
(Crystal attached to XTI-XTO)
VD
VL = 3.3 V
VL = 5.0 V
100
μA
1.5
mA
4
mA
Normal Operation (Note 5)
Supply Current at 48 kHz Fsi and Fso
(Oscillator attached to XTI-XTO)
VD
VL = 3.3 V
VL = 5.0 V
24
mA
2.5
mA
4
mA
Supply Current at 192 kHz Fsi and Fso
(Oscillator attached to XTI-XTO)
VD
VL = 3.3 V
VL = 5.0 V
80
mA
8
mA
13
mA
Supply Current at 48 kHz Fsi and Fso
(Crystal attached to XTI-XTO)
VD
VL = 3.3 V
VL = 5.0 V
24
mA
3
mA
7
mA
Supply Current at 192 kHz Fsi and Fso
(Crystal attached to XTI-XTO)
VD
VL = 3.3 V
VL = 5.0 V
80
mA
4
mA
6.5
mA
4. Power Down Mode is defined as RST = LOW with all clocks and data lines held static, except when a
crystal is attached across XTI-XTO, in which case the crystal will begin oscillating.
5. Normal operation is defined as RST = HI.
12
DS641F4
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