AD1981BL Analog Devices, AD1981BL Datasheet - Page 4

• Manufacturer Part Number: AD1981BL
• Description: Low Voltage AC'97 Soundmax Codec
• Manufacturer: Analog Devices

SPECIFICATIONS
AD1981BL
Parameter
CLOCK SPECIFICATIONS
NOTES
1
2
Specifications subject to change without notice.
Parameter
POWER-DOWN STATES*
*Values presented with V
Specifications subject to change without notice.
TIMING PARAMETERS
Parameter
RESET Active Low Pulse Width
RESET Inactive to BIT_CLK Start-Up Delay
SYNC Active High Pulse Width
SYNC Low Pulse Width
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 Pulse Width
BIT_CLK Low Pulse Width
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
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
(Applies to SYNC, SDATA_OUT)
REFOUT
1, 2, 3
(continued)
not loaded.
1
(Guaranteed over Operating Temperature Range)
Set Bits
(No Bits Value)
PR0
PR1
PR1, PR0
PR2
PR2, PR0
PR2, PR1
PR2, PR1, PR0
PR5, PR4, PR3, 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
47.76
40.1
32.8
13.2
47.7
40
32.77
13.9
0
47.7
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
38.9
34.39
26.3
20.55
19.39
14.86
6.39
1.15
0
32
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
Typ
Max
60
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
Unit
ms
ns
µs
µs
ns
MHz
ppm
ns
ps
ns
ns
kHz
ms
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ms
ns
ns
ns
ns
ns
Unit
MHz
%
REV. 0