A/D, D/C Converters for Image Signal Processing
MN657021F
Low Power 8-Bit, 3-Channel CMOS D/A Converter for Image Processing
Overview
The MN657021F is a high-speed 8-bit, 3-channel
CMOS digital-to-analog converter. (Two channels use
serial input.)
It uses both a matrix cell and weighted current technol-
ogy to achieve both low power consumption and high
speed.
It provides independent output amplitude adjustment
for the Y (luminance) and C (chroma) synchronization
signals. The Y (luminance signal) can be superimposed
with an external SYNC signal.
Pin Assignment
Features
Maximum conversion rate: 27 MSPS (min.)
Linearity error:
鹵0.2
LSB (typ.)
Differential linearity error:
鹵0.2
LSB (typ.)
Power supply voltage: 3.15
鹵0.3
V
Full scale current: 1.75 mA (typ.)
Power consumption: 54 mW (typ.) (f
CLK
=27 MHz)
Applications
Digital television
Digital video equipment
Digital image processing equipment
DY4
DY3
DY2
DY1
SYNC
DV
DD
DV
SS
MSEL
N.C.
AV
DD
COMPS
I
REFS
1
2
3
4
5
6
7
8
9
10
11
12
N.C.
DC3
DC2
DC1
UVSEL
DV
DD
DV
SS
CLK
DY8
DY7
DY6
DY5
37
38
39
40
41
42
43
44
45
46
47
48
36
35
34
33
32
31
30
29
28
27
26
25
DC4
DC5
DC6
DC7
DC8
DV
SS
DV
DD
N.C.
AV
SS
V
REFC
I
REFC
COMPC
24
23
22
21
20
19
18
17
16
15
14
13
N.C.
I
OV
AV
DD
I
OU
AV
SS
AV
DD
I
OY
AV
SS
V
REFY
I
REFY
COMPY
V
REFY
(TOP VIEW)
TQFP048-P-0707
1