Analogue Application Information
External Components
V
DD
R
6
XTAL
SEE INSET 2
XTAL/CLOCK
SERIAL CLOCK
COMMAND DATA
CHIP SELECT
C
9
1
2
3
4
5
6
7
8
9
10
11
12
V
DD
24
23
22
21
MODULATION 2 DRIVE
MODULATION 1 DRIVE
AUDIO OUT
MOD IN
SUM OUT
SUM IN
R
8
R
7
C
11
V
SS
EXTERNAL SIGNAL
AND
DATA INPUTS
VOGAD OUT
RX AUDIO IN
C
12
R
5
FX806A J
20
19
18
17
16
15
14
13
R
9
VOGAD IN
V
BIAS
MIC. IN (+)
MIC. IN (-)
V
SS
MAIN
PROCESSOUT
CALIBRATION IN
R
10
EXTERNAL AUDIO PROCESS
PROCESSED AUDIO IN
MIC. OUT
SEE INSET 1
C
13
R
11
R
12
C
8
C
10
V
SS
V
SS
V
BIAS
XTAL
X
1
C
5
C
MIC. IN (+)
C
C
MIC. IN (-)
2
1
4
1
FX806A J
R
4
10
R
2
+
-
13
MIC. OUT
XTAL/CLOCK
2
C
6
C
7
11
R
1
R
3
FX806A J
C
3
INSET 1
V
SS
INSET 2
Fig.2 Recommended External Components
Component
R
1
=
R
2
R
3
R
4
R
5
R
6
R
7
R
8
R
9
Value
10.0kΩ
10.0kΩ
20.0kΩ
20.0kΩ
10.0kΩ
2.2MΩ
100kΩ
100kΩ
100kΩ
R
10
R
11
R
12
C
1
C
2
C
3
C
4
C
5
C
6
=
100kΩ
100kΩ
2.2MΩ
470nF
470nF
270pF
270pF
0.1µF
33pF
C
7
=
5 – 65pF
C
8
1.0µF
C
9
1.0µF
C
10
1.0µF
C
11
22pF
C
12
100nF
C
13
10.0nF
X
13
4.0MHz
Tolerance: R =
±10%.
C =
±
20%
Notes
To demonstrate the versatility of the Mic. inputs, Input
Op-Amp gain/attenuation components for a voltage gain of
6.0dB are shown (INSET 1) in a differential configuration.
Components for a single (+ or -) input may be employed.
Resistor values R
7
to R
11
(summation components) are
dependant upon application and configuration requirements.
Xtal circuit capacitors C
6
(C
D
) and C
7
(C
G
) shown (INSET
2) are recommended in accordance with
CML Application
Note D/XT/2 December 1991.
Circuit drive and drain resistors
are incorporated on-chip.
Operation of any CML microcircuit without a Xtal or clock
input may cause device damage. To minimise damage in the
event of a Xtal/drive failure, it is recommended that the power
rail (V
DD
) is fitted with a current limiting device (resistor or fast
reaction fuse).
VOGAD Components Calculations
– Figures 2 and 3
Provided R
5
>>1.0kΩ and R
6
= R
12
>>R
5
Then:
Attack Time (T
A
)
= R
5
x C
8
Decay Time (T
D
)
= R
6
x C
8
2
4
CMLMICRO [ CML MICROCIRCUITS ]
