CS4235 Datasheet, PDF (6/94 Pages) Cirrus Logic – CrystalClear Low Cost ISA Audio System

CS4235
CrystalClear ^TM Low Cost ISA Audio System
RECOMMENDED OPERATING CONDITIONS
(AGND, DGND, SGND = 0 V, all voltages with respect to 0 V.)
Parameter
Symbol Min
Typ
Max Units
Power Supplies:
Digital
Digital Filtered
Analog
(Note 5) VD1
4.75
5.0
5.25 V
VDF1-VDF3 4.75
5.0
5.25 V
VA
4.75
5.0
5.25 V
Operating Ambient Temperature
T_A
Note 5: VD1 supplies the power to the ISA interface pins.
0
25
70
°C
ADC1/DAC1 DIGITAL FILTER CHARACTERISTICS (Note 1)
Parameter
Symbol Min
Typ
Passband
Frequency Response
Passband Ripple
Transition Band
Stop Band
Stop Band Rejection
Group Delay
Group Delay Variation vs. Frequency
(0-0.40xFs)
ADC1
DAC1
0
-
-1.0
-
-
-
0.40xFs
-
0.60xFs
-
74
-
-
-
-
-
-
-
Max
0.40xFs
+0.5
±0.1
0.60xFs
-
-
10/Fs
0.0
0.1/Fs
Units
Hz
dB
dB
Hz
Hz
dB
s
µs
µs
DIGITAL CHARACTERISTICS
(TA = 25 °C; VA, VDF1-VDF3 = +5 V, VD1 = +5 V; AGND, DGND1, SGND1-SGND4 = 0 V.)
Parameter
Symbol
Min
Max
Units
High-level Input Voltage
UP/DOWN/MUTE VIH
3.0
-
V
Other Digital Inputs
2.0
-
V
XTALI
VDF-1.0
-
V
Low-level Input Voltage
V_IL
-
0.8
V
High-level Output Voltage: ISA Bus Pins I0 = -24.0 mA V_OH
2.4
IOCHRDY, SDA (Note 6)
-
All Others
I0 = -1.0 mA
2.4
VD1
V
VDF
V
VDF
V
Low-level Output Voltage: ISA Bus Pins I0 = 24.0 mA V_OL
-
MCLK, SDOUT, MIDOUT, IOCHRDY I0 = 8.0 mA
-
All Others
I0 = 4.0 mA
-
0.4
V
0.4
V
0.4
V
Input Leakage Current
(Digital Inputs)
-10
10
µA
Output Leakage Current
(High-Z Digital Outputs)
-10
10
µA
Note 6. Open Collector pins. High level output voltage dependent on external pull up (required) used and
number of peripherals (gates) attached.
6
DS252PP2