AD652
+V
+V
+V
S
S
S
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
AD652
AD652
AD652
SYNCHRONOUS
VOLTAGE-TO-
FREQUENCY
CONVERTER
SYNCHRONOUS
VOLTAGE-TO-
FREQUENCY
CONVERTER
SYNCHRONOUS
VOLTAGE-TO-
FREQUENCY
CONVERTER
0.02µF
0.02µF
0.02µF
V
φ
2
V
φ
3
V
φ4
IN2
IN3
IN4
15pF
15pF
15pF
–V
–V
–V
S
S
S
TIM 9904A
TANK 1
MULTIPLEX
OUT
+5V
V
1
2
20
19
18
17
16
15
14
13
12
11
ONE SHOT
'121
CC
+5V
V
TANK 2
GND 1
FFQ
FFD
XTAL 2
CC
3.2768MHz
CRYSTAL
1
2
3
4
5
6
14
13
3
XTAL 4
OSCIN
+5V
NC
A1
NC
1kΩ
7.4µH
2kΩ
+5V
4
φ
1
L = 41 TURNS
T50–7 CORE
MICROMETALS
C = 300pF
12 NC
R
/C
500Ω
A2
5
EXT EXT
OSCOUT
11
10
9
150Ω
50pF
EXT
C
R
6
φ
φ
φ
φ
4 TTL
φ
φ
2 TTL
1 TTL
Q
7
3 TTL
1500pF
INT
Q
Q
GND
φ
φ
3
4
3
4
V
+5V
8
7
8
NC
DD
10kΩ
φ
2
φ1
φ
φ
1
2
9
2N2222
10
GND 2
18pF
Figure 26. SVFC Multiplexer
AM26LS31
QUAD HIGH SPEED DIFFERENTIAL LINE RECEIVER
+5V
FROM
INPUTS A
ENCODER
MPX
1
2
3
4
5
6
7
8
16
INPUT
15 INPUTS D
14
A OUTPUTS
ENABLE
D OUTPUTS
13
12 ENABLE
11
B OUTPUTS
C OUTPUTS
10
9
INPUT B
GND
INPUT C
QUAD DIFFERENTIAL LINE RECEIVER
AM26LS33
+5V
75Ω
1
2
3
4
5
6
7
8
16
15
14
13
INPUTS A
500 FEET
BELDEN 9272
78Ω SHIELDED PAIR
INPUTS B
OUTPUT B
OUTPUT A
ENABLE
12 ENABLE
11 INPUT D
10
OUTPUT C
INPUTS C
INPUTS D
9
MPX OUTPUT
TO DECODER
Figure 27. RS-422 Standard Data Transmission
Rev. C | Page ±9 of 28
ADI [ ADI ]
