--1--
E90603F01
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by
any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the
operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
Absolute Maximum Ratings (Ta=25 C)
Supply voltage
AV
DD
, DV
DD
7
V
Input voltage (All pins)
V
IN
V
DD
+0.5 to V
SS
0.5 V
Output current (Every each channel)
I
OUT
0 to 15
mA
Storage temperature Tstg
55 to +150
C
Recommended Operating Conditions
Supply voltage
AV
DD
, AV
SS
4.75 to 5.25
V
DV
DD
, DV
SS
4.75 to 5.25
V
Reference input voltage
V
REF
2.0
V
Clock pulse width
T
PW1
, T
PW0
11.2 ns (min.) to 1.1 s (max.)
Operating temperature
Topr
40 to +85
C
Description
The CXD1178Q is an 8-bit high-speed D/A
converter for video band use. It has an input/output
equivalent to 3 channels of R, G and B. It is suitable
for use of digital TV, graphic display, and others.
Features
Resolution 8-bit
Maximum conversion speed 40MSPS
RGB 3-channel input/output
Differential linearity error 0.3LSB
Low power consumption 240 mW
(200
load at 2 Vp-p output)
Single 5 V power supply
Low glitch noise
Stand-by function
Structure
Silicon gate CMOS IC
8-bit 40MSPS RGB 3-channel D/A Converter
48 pin QFP (Plastic)
CXD1178Q
--3--
CXD1178Q
Pin Configuration
R
0
R
1
R
2
R
3
R
4
R
5
R
6
R
7
G
0
G
1
G
2
G
3
B7
B6
B5
B4
B3
B2
B1
B0
G7
G6
G5
G4
B
C
K
R
O
I
R
E
F
V
R
E
F
A
V
S
S
V
B
D
V
S
S
D
V
S
S
G
C
K
R
C
K
C
E
B
L
K
RO
GO
GO
BO
BO
VG
AV
DD
AV
DD
AV
DD
AV
DD
DV
DD
DV
DD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
Pin Description and I/O Pins Equivalent Circuit
Pin No.
Symbol
I/O
Equivalent circuit
Description
1 to 8
9 to 16
17 to 24
25
32
R0 to R7
G0 to G7
B0 to B7
BLK
VB
I
I
O
1
24
DV
DD
DV
SS
to
DV
DD
DV
SS
25
DV
DD
DV
SS
32
DV
DD
Digital input
R0 (LSB) to R7 (MSB)
G0 (LSB) to G7 (MSB)
B0 (LSB) to B7 (MSB)
Blanking input.
This is synchronized with the clock
input signal for each channel.
No signal at "H" (Output 0 V).
Output condition at "L".
Connect a capacitor of about 0.1 F.
--4--
CXD1178Q
Pin No.
Symbol
I/O
Equivalent circuit
Description
27
28
29
30, 31
33
26
35
34
42
43 to 46
RCK
GCK
BCK
DV
SS
AV
SS
CE
IREF
VREF
VG
AV
DD
I
--
--
I
O
I
O
--
DV
DD
DV
SS
28
27
29
DV
DD
DV
SS
26
AV
DD
AV
SS
34
35
AV
DD
AV
SS
AV
DD
AV
DD
AV
SS
42
Clock input.
Digital GND
Analog GND
Chip enable input.
This is not synchronized with the
clock input signal.
No signal (Output 0 V) at "H" and
minimizes power consumption.
Reference current output.
Connect a resistance 16 times
"16R
OUT
" that of output resistance
value "R
OUT
".
Reference voltage input.
Set full scale output value.
Connect a capacitor of about 0.1 F.
Analog V
DD
PDF 
ZIP
