CS8421 Cirrus Logic, CS8421 Datasheet - Page 12

• Manufacturer Part Number: CS8421
• Description: 32-bit 192 kHz Asynchronous Sample Rate Converter
• Manufacturer: Cirrus Logic

12
DIGITAL FILTER CHARACTERISTICS
DC ELECTRICAL CHARACTERISTICS
(GND = 0 V; all voltages with respect to 0 V.)
Passband (Upsampling or Downsampling)
Passband Ripple
Stopband
Stopband Attenuation
Group Delay
Power-Down Mode
Supply Current in power-down
(Oscillator attached to XTI-XTO)
Supply Current in power-down
(Crystal attached to XTI-XTO)
Normal Operation
Supply Current at 48 kHz Fsi and Fso
(Oscillator attached to XTI-XTO)
Supply Current at 192 kHz Fsi and Fso
(Oscillator attached to XTI-XTO)
Supply Current at 48 kHz Fsi and Fso
(Crystal attached to XTI-XTO)
Supply Current at 192 kHz Fsi and Fso
(Crystal attached to XTI-XTO)
3. The equation for the group delay through the sample-rate converter is (56.581 / Fsi) + (55.658 / Fso).
4. Power Down Mode is defined as RST = LOW with all clocks and data lines held static, except when a
5. Normal operation is defined as RST = HI.
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.
crystal is attached across XTI-XTO, in which case the crystal will begin oscillating.
(Note 5)
(Note 4)
Parameters
Parameter
VL = 3.3 V
VL = 5.0 V
VL = 3.3 V
VL = 5.0 V
VL = 3.3 V
VL = 5.0 V
VL = 3.3 V
VL = 5.0 V
VL = 3.3 V
VL = 5.0 V
VL = 3.3 V
VL = 5.0 V
VD
VD
VD
VD
VD
VD
Symbol
0.5465*Fso
Min
125
Min
-
-
(Note 3)
Typ
100
200
100
Typ
1.5
2.5
6.5
50
24
80
13
24
80
4
4
8
3
7
4
-
-
-
-
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0.4535*Fso
Max
±0.007
Max
-
-
CS8421
DS641F2
Units
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
μA
μA
μA
μA
Units
ms
Hz
dB
Hz
dB