Sony BVW-55 Maintenance Manual page 571

CXD1175AM-TH (SONY)
C-MOS 8-BIT 20 MSPS VIDEO A / D CONVERTER
—TOP VIEW—
DV
SS
OE 1 24
IN
( GND )
DV
SS
2 23 VRB
IN
( GND )
D0 3 22 VRBS
OUT IN
AV
SS
D1 4 21
OUT
( GND )
AV
SS
D2 5 20
OUT
( GND )
D3 6 19 VIN
OUT IN
AV
AV
D4 7 AV 18
OUT DD
CK
D0 - 7
D5 8 17 VRT
OUT IN
DV
DV
D6 9 16 VRTS
OUT IN OE
VIN
D7 10 AV 15
OUT DD
VRB
VRBS
11 DV AV 14
DD DD
VRT
CK 12 13 VRTS
IN DV
DD
INPUT SIGNAL
STEP
VOLTAGE D7 D6 D5
0 0 V ( VRT ) 1 1 1
1 1 1
1 0.01 V
1 0 0
127 1.34 V
128 1.35 V 0 1 1
2.7 V ( VRB ) 0 0 0
255
0 ; LOW LEVEL
1 ; HIGH LEVEL
AV
DD
16
VRTS
17
SAMPLING
REFERENCE
VRT
COMPARATOR
VOLTAGE
( 4-BIT )
23 SUPPLY
VRB
22
VRBS
SAMPLING
AV
SS
19
VIN COMPARATOR
( 4-BIT )
CLOCK SAMPLING
12
COMPARATOR
CK
3
GENERATOR ( 4-BIT )
1
OE
BVW-55
16 3
VRTS D0
17 4
VRT D1
5
D2
19 6
VIN D3
12 7
D4
8
D5
22 9
VRBS D6
23 10
VRB D7
OE
1
; ANALOG POWER SUPPLY
DD
; ANALOG GROUND
SS
; CLOCK INPUT
; DIGITAL DATA OUTPUTS (LSB to MSB)
; DIGITAL POWER SUPPLY
DD
; DIGITAL GROUND
SS
; OUTPUT ENABLE
(OE = HIGH ; HIGH IMPEDANCE)
; ANALOG VOLTAGE INPUT
; BOTTOM REFERENCE VOLTAGE INPUT
; AS SHORT-CIRCUIT AT VRB.
GENERATES +0.6 V
; TOP REFERENCE VOLTAGE INPUT
; AS SHORT-CIRCUIT AT VRT.
GENERATES +2.6 V
DATA OUTPUTS
D4 D3 D2 D1 D0
1 1 1 1 1
1 1 1 1 0
0 0 0 0 0
1 1 1 1 1
0 0 0 0 0
ENCODER
( 4-BIT )
3
D0
DATA
4
D1
5
D2
LATCH
6
ENCODER
D3
( 4-BIT )
7
D4
ENCODER
8
D5
DATA
9
( 4-BIT )
D6
10
LATCH
D7
CXD1178Q (SONY)
CXD1178Q-T6
3-CH 8-BIT D/A CONVERTER
—TOP VIEW—
37
38
39
40
41
42
43
44
45
46
47
48
PIN PIN PIN
NO. I/O SIGNAL NO. I/O SIGNAL NO. I/O SIGNAL
1 I R0 ( LSB ) 13 I G4 25 I BLK
2 I R1 14 I G5 26 I CE
3 I R2 15 I G6 27 I RCK
4 I R3 16 I G7 28 I GCK
B0 ( LSB )
5 I R4 17 I 29 I BCK
6 I R5 18 I B1 30 — D GND
7 I R6 19 I B2 31 — D GND
8 I R7 20 I B3 32 I VB
G0 ( LSB )
9 I 21 I B4 33 — A GND
10 I G1 22 I B5 34 I VREF
11 I G2 23 I B6 35 I IREF
12 I G3 24 I B7 36 O RO
1
R0
(LSB)
CURRENT
2
R1
3
R2
4
DECODER
R3
5
R4 LATCHES
CURRENT
6
R5
7
DECODER
R6
8
R7
GENERATOR
9
G0
(LSB)
CURRENT
10
G1
11
G2
12
G3 DECODER
13
LATCHES
G4
CURRENT
14
G5
15
G6 DECODER
16
G7
GENERATOR
17
B0
(LSB)
CURRENT
18
B1
19
B2
20
DECODER
B3
21
B4 LATCHES
CURRENT
22
B5
23
B6 DECODER
24
B7
GENERATOR
25
BLK
CURRENT CELLS
( FOR FULL SCALE )
BIAS VOLTAGE
GENERATOR
1
R0 RO
2
R1 RO
3
R2
4
24
R3 GO
5
23
R4 GO
6
22
R5
7
21
R6 BO
8
20
R7 BO
19
9
18
G0 VG
10
17
G1 VB
11
16
G2
12
15
G3
13
14
G4
14
13
G5
15
G6
16
G7
17
B0
18
B1
19
PIN B2
NO. I/O SIGNAL
20
B3
21
37 O RO
B4
22
38 O GO
B5
23
39 O GO
B6
24
40 O BO
B7
41 O BO
27
42 I VG
RCK
28
43 — A V
DD GCK
29
44 — A V
DD BCK
34
45 — A V
DD VREF
35
46 — A V
DD IREF
47 — D V
DD
BLK CE
48 — D V
DD
25 26
2LSB'S
CELLS
36
RO
6MSB'S 37
RO
CELLS
27
CLOCK RCK
26
CE
2LSB'S
CELLS
38
GO
6MSB'S 39
GO
CELLS
28
CLOCK GCK
2LSB'S
CELLS
40
BO
6MSB'S 41
BO
CELLS
29
CLOCK BCK
42
VG
34
– VREF
+
35
IREF
32
VB
2-21
IC
36
37
38
39
40
41
42
32