FX629J CMLMICRO [CML Microcircuits], FX629J Datasheet - Page 5

• Manufacturer Part Number: FX629J
• Description: Delta Modulation Codec
• Manufacturer: CMLMICRO [CML Microcircuits]

Codec Timing Information
Digital to Analogue Performance ......
Decoder Input pin, the analogue signals measured at the Decoder Output pin are 800Hz
described.
Fig.4 Codec Timing Diagrams
Table 1 Bit Sequence Tests and Results
Sample Rate
TIMING
t
t
CH
CL
16kbit/s
32kbit/s
16kbit/s
32kbits
Clock '0' Pulse Width
Clock '1' Pulse Width
DECODER TIMING
MULTIPLEXING FUNCTION
ENCODER
OUTPUT
ENCODER
CLOCK
ENCODER DATA
OUTPUT
DECODER
CLOCK
DECODER DATA
INPUT
DATA ENABLE
ENCODER TIMING
1.0 s Min.
1.0 s Min.
DATA CLOCKED
Bit Sequence at Decoder Input
11011011010010010010
1101101101010100100100100100101010110110
11111011010000010010
1111110110101010000100000010010101011110
HIGH Z
t
t
DR
PCO
t
t
t
t
IR
IF
DR
CH
Clock Fall Time
Clock Rise Time
Data Rise Time
100ns Typ.
100ns Typ.
100ns Typ.
DATA CLOCKED
t
SU
DATA TRUE TIME
t
IF
Using the bit sequence tests shown in Table 1 (below) at the
t
CL
t
H
t
t
t
SU
H
DF
5
Data Hold Time
Data Fall Time
Data Set-up Time
100ns Typ.
450ns Min.
600ns Min.
t
IR
t
CH
t
DF
HIGH Z
“Run of Threes”
t
t
Xtal Input Frequency
SU
PCO
+ t
Clock to Output Delay Time
H
(%)
30
30
= Data True Time
1.024MHz.
0
0
750ns Max.
10Hz at the levels
Output Level
-29.2
-30.0
at 800Hz
(dBm0)
0
0
1
1
2
2