PCM78 Burr-Brown Corporation, PCM78 Datasheet - Page 13

• Manufacturer Part Number: PCM78
• Description: 16-Bit Audio ANALOG-TO-DIGITAL CONVERTER
• Manufacturer: Burr-Brown Corporation

FIGURE 12. Short Cycle Operation Timing.
FIGURE 9. Timing when using S
FIGURE 10. Application Example of S
FIGURE 11 . Short Cycle Circuit.
T
(S
Conversion
A
TIME
S
Serial Out 2
Serial Out 1
S
S
Status
S
S
= +25 C, V
T
T
T
T
OUT 2
OUT 2
Clock
Clock
(
Latch
Ext Clock
OUT 2
(
OUT 2
OUT 2
Data
OUT 1
WDCK
Data
1
2
3
4
PCM78P
(2f )
128
Ext
128
Status
3
Clock
Cycle
2
Short
Time
S
Latch)
Clock
CC
f
S
f
)
S
+5V
)
DESCRIPTION
S
S
Delay from rising edge of CLOCK OUT to bit data valid
Delay from rising edge of S
OUT2
OUT2
CC
10
19
= +5V, guaranteed by sample testing; these parameters are not 100% tested in production.
Latch pulse width
Clock Cycle
Clock Out
Convert Command
T
2
LS20
MSB
MSB
1
T
1
MSB
Word A’s Serial Data
2
OUT2
OUT2
T
13
12
3
1
2
Clock to rising edge of Ext Clock
1 Word
Latch.
Data (n – 1)
3
T
OUT 2
A
CL
A
CL
4
LS393
Q
Q
Q
Q
Q
Operation.
4
A
B
C
D
E
11
3
4
5
6
LSB
11
Jumper
+5V
1
2
3
4
5
12
Data Sample n
LSB
13
10k x 4
13
LS20
MSB
MSB
Word A’s Serial Data
Short
(PCM78)
Cycle
18
1
Word A's Serial Data
B
LSB
LSB
2
MIN
50
50
X: Off
NO OF BITS
LSB
MSB
3
15
14
13
12
11
10
9
8
PCM78
MSB
0: On
TIME (ns)
TYP
100
125
Data n
11
24
10
MSB
1
X
0
X
0
X
0
X
0
Data (n + 1)
12
X
X
X
X
2
0
0
0
0
JUMPER
MAX
X
X
X
X
3
0
0
0
0
30
13
LSB
X
4
0
0
0
0
0
0
0
X
X
X
X
X
X
X
5
0
®