Analogue Control Interface
FX839
1.3
Signal List (continued)
Package
P4/D2/D5
Signal
Description
Pin No.
10
Name
ADCIN3
ADCIN4
Type
I/P
Analogue to digital converter input 3 (ADC3)
Analogue to digital converter input 4 (ADC4)
11
I/P
12
V
SS
POWER
The negative supply rail (ground) for both analogue and
digital supplies.
13
14
V
BIAS
O/P
N/C
An analogue bias line for the internal circuitry, held at ½
AV . This pin must be decoupled by a capacitor mounted
DD
close to the device pins.
No internal connection. Do not make any connection to
this pin.
15
16
17
18
DACOUT1
DACOUT2
DACOUT3
O/P
O/P
O/P
N/C
Digital to analogue converter No. 1 output (DAC1)
Digital to analogue converter No. 2 output (DAC2)
Digital to analogue converter No. 3 output (DAC3)
No internal connection. Do not make any connection to
this pin.
19
AV
POWER
The positive analogue supply rail. Analogue levels and
voltages are dependent upon this supply. This pin should
DD
be decoupled to V by a capacitor.
SS
20
21
22
23
24
MOD1 IN
MOD2 IN
MOD1
I/P
I/P
Input to MOD1 variable attenuator.
Input to MOD2 variable attenuator.
Output of MOD1 variable attenuator.
Output of MOD2 variable attenuator.
O/P
MOD2
O/P
DV
POWER
The positive digital supply rail. Digital levels and voltages
are dependent upon this supply. This pin should be
DD
decoupled to V by a capacitor.
SS
Notes: I/P
O/P
=
=
Input
Output
Consumer Microcircuits Limited
5
1997
D/839/4
CMLMICRO [ CML MICROCIRCUITS ]
