PANASONIC MN6557A

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
Pin Assignment
MN6557A
MN6557AS
DIP022-P-0400
SOP022-P-0375
DVDD
1
22
CLK
AVDD
2
21
D1
AVDD
3
20
D2
IREF
4
19
D3
VREF
5
18
D4
COMP
6
17
D5
VIB
7
16
D6
IOUT
8
15
D7
AVSS
9
14
D8
AVSS
10
13
D9
DVSS
11
12
D10
( TOP VIEW )
Digital TV
Digital video
Digital signal processing equipment
1
MN6557A, MN6557AS
A/D, D/C Converters for Image Signal Processing
Block Diagram
(LSB) D10 12
13
D9
14
D8
15
D7
D6 16
D5 17
X-Decoder
Latch
Y-Decoder
1/2
Latch
18
19
D3
20
D2
21
(MSB)D1
+
22
CLK
–
COMP 6
D4
Latch
1/4
1/8
Matrix Cell
(127=8 × 16–1)
8 IOUT
RREF
11
DVSS
10
AVSS
9
AVSS
1
DVDD
VIB
2
3
Current
Source
AVDD
+
–
2
4
AVDD
5
IREF
7
VREF
ROUT
A/D, D/C Converters for Image Signal Processing
MN6557A, MN6557AS
Pin Descriptions
Pin No.
1
Symbol
DVDD
Function Description
Power supply for digital section
2
AVDD
Power supply for analog section
3
AVDD
Power supply for analog section
4
IREF
Full-scale adjustment resistor
5
VREF
Reference voltage input
6
COMP
Phase compensation
7
VIB
Capacitor connection
8
IOUT
Analog current output
9
AVSS
Analog GND
10
AVSS
Analog GND
11
DVSS
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
Digital-section power supply voltage
Symbol
DVDD
Rating
– 0.3 to +7.0
Unit
V
Analog-section power supply voltage
AVDD
– 0.3 to +7.0
V
VI
DVSS – 0.3 to DVDD + 0.3
V
Output voltage
VO
AVSS – 0.3 to AVDD + 0.3
V
Operating ambient temperature
Topr
–20 to +70
˚C
Storage temperature
Tstg
–55 to +125
˚C
Input voltage
3
MN6557A, MN6557AS
A/D, D/C Converters for Image Signal Processing
Recommended Operating Conditions
Parameter
Power supply voltage
min
4.5
typ
5.0
max
5.5
Unit
V
Reference voltage
VREF
2.95
V
Reference resistance
RREF
680
Ω
External compensating capacitance
CCOMP
1
µF
Output load resistance
ROUT
75
Ω
Digital input voltage
Clock
"H" level
VIH
2.4
VDD
V
"L" level
VIL
VSS
0.8
V
"H" pulse width
tWH
13
ns
"L" pulse width
tWL
13
ns
Electrical Characteristics
Parameter
Power supply current
Resolution
DVDD=AVDD=5.0V, DGND=AGND=0V, Ta=25˚C
Symbol
IDD
Condition
RREF=680Ω, VREF=2.95V
min
RES
typ
25
max
50
Unit
mA
10
bit
EL
ROUT=75Ω, RREF=680Ω
±0.5
±1.0
LSB
Differential linearity error
ED
VREF=2.95V
±0.3
±1.0
LSB
Full-scale current
IFS
RREF=680Ω, VREF=2.95V
Hold time
tH
10
ns
Setup time
tS
10
ns
Linearity error
Settling time
Maximum conversion rate
4
VDD=AVDD=DVDD=5.0V, VSS=AVSS=DVSS=0V, Ta=25˚C
Symbol
VDD
tST
FC(max.)
13
ROUT=75Ω, RREF=680Ω
VREF=2.95V
20
30
50
mA
33
ns
MSPS
A/D, D/C Converters for Image Signal Processing
MN6557A, MN6557AS
Timing Chart
tWH
tWL
2.4V
CLK
0.8V
tS
Data
Dn-1
tH
Dn
Dn+1
±1LSB
Analog Out
(settling waveform)
An
td tST
±1LSB
td tST
5
MN6557A, MN6557AS
A/D, D/C Converters for Image Signal Processing
Package Dimensions (Unit: mm)
MN6557A
DIP022-P-0400
27.7±0.4
12
1
11
2.54
3.3±0.3
0.7min.
5.3max.
3.65±0.20
8.6±0.2
22
0.5±0.1
0 to 15°
SEATING PLANE
1.2±0.1
MN6557AS
10.16±0.20
SOP022-P-0375
15.30±0.20
22
12
+0.10
0.15 -0.05
9.40±0.30
7.20±0.20
1.10±0.20
0 to 10°
0.30min.
(1.29)
1.27
0.40±0.10
SEATING PLANE
6
0.10±0.10
2.00±0.20
11
2.40max.
1
+0.20
.05
0.25 -0