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Part Number MN6557A

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1
A/D, D/C Converters for Image Signal Processing
MN6557A, MN6557AS
Low-Power-Consumption CMOS 10-Bit D/A Converters for Image Processing
Overview
The MN6557A and MN6557AS are CMOS 10-bit D/A
converters with a maximum conversion rate of 30 MSPS.
High precision has been achieved by the combined use
of a matrix cell system and weighted current system. They
also feature low power consumption owing to the use of
a CMOS process, and operate on a single power supply
of 5V, and have a TTL input level.
These devices are suitable for digitalization of image
processing in video, TV, and similar applications.
Features
Maximum conversion rate: 30 MSPS (min.)
Linearity error:
±
0.5 LSB (typ.)
Differential linearity error:
±
0.3 LSB (typ.)
Power supply voltage: 5.0
±
0.5 V
Power consumption: 125 mW (typ.)
Full-scale current: 13 mA (typ.)
Applications
Digital TV
Digital video
Digital signal processing equipment
Pin Assignment
( TOP VIEW )
DV
DD
AV
DD
AV
DD
I
REF
V
REF
COMP
VIB
I
OUT
AV
SS
AV
SS
DV
SS
CLK
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
1
2
3
4
5
6
7
8
9
10
11
22
21
20
19
18
17
16
15
14
13
12
MN6557A
DIP022-P-0400
MN6557AS
SOP022-P-0375
2
MN6557A, MN6557AS
A/D, D/C Converters for Image Signal Processing
Block Diagram
12
13
14
15
16
17
18
19
20
21
22
6
5
4
7
2
3
1
9
10
11
8
(LSB) D10
D9
D8
D7
D6
D5
D4
D3
D2
(MSB)D1
CLK
COMP
+
R
REF
V
REF
I
REF
+
­
VIB
AV
DD
AV
DD
DV
DD
DV
SS
I
OUT
R
OUT
AV
SS
AV
SS
X-Decoder
Y-Decoder
Latch
Latch
Latch
1/2
1/4
1/8
Current
Source
Matrix Cell
(127=8
×
16­1)
­
3
A/D, D/C Converters for Image Signal Processing
MN6557A, MN6557AS
Pin Descriptions
Pin No.
Symbol
Function Description
1
DV
DD
Power supply for digital section
2
AV
DD
Power supply for analog section
3
AV
DD
Power supply for analog section
4
I
REF
Full-scale adjustment resistor
5
V
REF
Reference voltage input
6
COMP
Phase compensation
7
VIB
Capacitor connection
8
I
OUT
Analog current output
9
AV
SS
Analog GND
10
AV
SS
Analog GND
11
DV
SS
Digital GND
12
D10
Digital input (LSB)
13
D9
Digital input
14
D8
Digital input
15
D7
Digital input
16
D6
Digital input
17
D5
Digital input
18
D4
Digital input
19
D3
Digital input
20
D2
Digital input
21
D1
Digital input (MSB)
22
CLK
Sampling clock
Absolute Maximum Ratings
Ta=25°C
Parameter
Symbol
Rating
Unit
Digital-section power supply voltage
DV
DD
­ 0.3 to +7.0
V
Analog-section power supply voltage
AV
DD
­ 0.3 to +7.0
V
Input voltage
V
I
DV
SS
­ 0.3 to DV
DD
+ 0.3
V
Output voltage
V
O
AV
SS
­ 0.3 to AV
DD
+ 0.3
V
Operating ambient temperature
T
opr
­20 to +70
°C
Storage temperature
T
stg
­55 to +125
°C
4
MN6557A, MN6557AS
A/D, D/C Converters for Image Signal Processing
Electrical Characteristics
DV
DD
=AV
DD
=5.0V, DGND=AGND=0V, Ta=25°C
Parameter
Symbol
Condition
min
typ
max
Unit
Power supply current
I
DD
R
REF
=680
, V
REF
=2.95V
25
50
mA
Resolution
RES
10
bit
Linearity error
E
L
R
OUT
=75
, R
REF
=680
±
0.5
±
1.0
LSB
Differential linearity error
E
D
V
REF
=2.95V
±
0.3
±
1.0
LSB
Full-scale current
I
FS
R
REF
=680
, V
REF
=2.95V
13
mA
Hold time
t
H
10
ns
Setup time
t
S
10
ns
Settling time
t
ST
R
OUT
=75
, R
REF
=680
20
33
ns
Maximum conversion rate
F
C(max.)
V
REF
=2.95V
30
50
MSPS
Recommended Operating Conditions
V
DD
=AV
DD
=DV
DD
=5.0V, V
SS
=AV
SS
=DV
SS
=0V, Ta=25°C
Parameter
Symbol
min
typ
max
Unit
Power supply voltage
V
DD
4.5
5.0
5.5
V
Reference voltage
V
REF
2.95
V
Reference resistance
R
REF
680
External compensating capacitance
C
COMP
1
µ
F
Output load resistance
R
OUT
75
Digital input voltage
"H" level
V
IH
2.4
V
DD
V
"L" level
V
IL
V
SS
0.8
V
Clock
"H" pulse width
t
WH
13
ns
"L" pulse width
t
WL
13
ns
5
A/D, D/C Converters for Image Signal Processing
MN6557A, MN6557AS
Timing Chart
CLK
Data
Analog Out
(settling waveform)
Dn-1
Dn
Dn+1
t
S
t
H
t
WH
t
WL
±1LSB
±1LSB
An
t
d
t
ST
t
d
t
ST
2.4V
0.8V