AD1981B Analog Devices, AD1981B Datasheet - Page 4

• Manufacturer Part Number: AD1981B
• Description: AD1981B AC'97 SoundMAX® Codec
• Manufacturer: Analog Devices

Parameter
CLOCK SPECIFICATIONS
NOTES
1
2
Specifications subject to change without notice.
AD1981B
Parameter
POWER-DOWN STATES*
*Values presented with V
Specifications subject to change without notice.
TIMING PARAMETERS
Parameter
NOTES
1
2
3
Specifications subject to change without notice.
Guaranteed but not tested.
Measurements reflect main ADC.
Guaranteed but not tested.
Output jitter is directly dependent on crystal input jitter.
Maximum jitter specification for noncrystal operation only. Crystal operation maximum is much lower.
Input Clock Frequency
Recommended Clock Duty Cycle
(Fully Active)
ADC
DAC
ADC + DAC
Mixer
ADC + Mixer
DAC + Mixer
ADC + DAC + Mixer
Standby
Headphone Standby
RESET Active Low Pulsewidth
RESET Inactive to BIT_CLK Start-Up Delay
SYNC Active High Pulsewidth
SYNC Low Pulsewidth
SYNC Inactive to BIT_CLK Start-Up Delay
BIT_CLK Frequency
BIT_CLK Frequency Accuracy
BIT_CLK Period
BIT_CLK Output Jitter
BIT_CLK High Pulsewidth
BIT_CLK Low Pulsewidth
SYNC Frequency
SYNC Period
Setup to Falling Edge of BIT_CLK
Hold from Falling Edge of BIT_CLK
BIT_CLK Rise Time
BIT_CLK Fall Time
SYNC Rise Time
SYNC Fall Time
SDATA_IN Rise Time
SDATA_IN Fall Time
SDATA_OUT Rise Time
SDATA_OUT Fall Time
End of Slot 2 to BIT_CLK, SDATA_IN Low
Setup to Trailing Edge of RESET
Rising Edge of RESET to HI-Z Delay
Propagation Delay
RESET Rise Time
Output Valid Delay from Rising Edge of BIT_CLK to SDI Valid
(Applies to SYNC, SDATA_OUT)
REFOUT
not loaded.
1, 2, 3
1
(Guaranteed over Operating Temperature Range)
Set Bits
PR5, PR4, PR3, PR2, PR1, PR0
(No Bits Value)
PR0
PR1
PR1, PR0
PR2
PR2, PR0
PR2, PR1
PR2, PR1, PR0
PR6
–4–
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
RST_LOW
RST2CLK
SYNC_HIGH
SYNC_LOW
SYNC2CLK
CLK_PERIOD
CLK_HIGH
CLK_LOW
SYNC_PERIOD
SETUP
HOLD
RISECLK
FALLCLK
RISESYNC
FALLSYNC
RISEDIN
FALLDIN
RISEDOUT
FALLDOUT
S2_PDOWN
SETUP2RST
OFF
Min
40
DV
42
36
29
12
42
36
29
12
0
42
DD
Typ
Min
162.8
162.8
32.56
32.56
5
5
2
2
2
2
2
2
2
2
0
15
Typ
24.576
50
AV
51
45
35
28
24
18
9
1.5
0
44
Typ
1.0
1.3
19.5
12.288
81.4
750
42
38
48.0
20.8
2.5
4
4
4
4
4
4
4
4
DD
Max
60
Typ
Max
± 1
2000
48.84
6
6
6
6
6
6
6
6
1.0
25
15
50
15
Unit
mA
mA
mA
mA
mA
mA
mA
mA
mA
mA
ps
Unit
ms
ns
ms
ns
MHz
ppm
ns
ns
ns
kHz
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
ns
ns
ns
ns
ns
REV. A
Unit
MHz
%