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FEATURES
80 MHz Pipelined Operation
Triple 8-Bit D/A Converters
RS-343A/RS-170 Compatible Outputs
TTL Compatible Inputs
+5 V CMOS Monolithic Construction
40-Pin DIP or 44-Pin PLCC and 48-Lead TQFP
APPLICATIONS
High Resolution Color Graphics
CAE/CAD/CAM Applications
Image Processing
Instrumentation
Video Signal Reconstruction
Desktop Publishing
Direct Digital Synthesis (DDS) and I/Q Modulation
SPEED GRADES*
80 MHz
50 MHz
30 MHz
CMOS
80 MHz, Triple 8-Bit Video DAC
ADV7120
FUNCTIONAL BLOCK DIAGRAM
V
AA
FS
ADJUST
V
REF
REFERENCE
AMPLIFIER
COMP
ADV7120
CLOCK
R0
R7
PIXEL
INPUT
PORT
RED
8
REGISTER
8
DAC
IOR
G0
G7
8
GREEN
REGISTER
8
DAC
IOG
B0
B7
8
BLUE
REGISTER
8
DAC
IOB
REF WHITE
BLANK
SYNC
CONTROL
REGISTER
SYNC
CONTROL
I
SYNC
GND
GENERAL DESCRIPTION
The ADV7120 (ADV ) is a digital to analog video converter on
a single monolithic chip. The part is specifically designed for
high resolution color graphics and video systems. It is also ideal
for any high speed communications type applications requiring
low cost, high speed DACs. It consists of three, high speed,
8-bit, video D/A converters (RGB); a standard TTL input inter-
face and high impedance, analog output, current sources.
The ADV7120 has three separate, 8-bit, pixel input ports, one
each for red, green and blue video data. Additional video input
controls on the part include composite sync, blank and refer-
ence white. A single +5 V supply, an external 1.23 V reference
and pixel clock input are all that are required to make the part
operational.
The ADV7120 is capable of generating RGB video output sig-
nals, which are compatible with RS-343A and RS-170 video
standards, without requiring external buffering.
The ADV7120 is fabricated in a +5 V CMOS process. Its
monolithic CMOS construction ensures greater functionality
with low power dissipation. The part is packaged in both a 0.6",
40-pin plastic DIP and a 44-pin plastic leaded (J-lead) chip car-
rier, PLCC. The ADV7120 is also available in a very small 48-
lead Thin Quad Flatpack (TQFP).
ADV is a registered trademark of Analog Devices, Inc.
*Speed grades up to 140 MHz are also available upon special request.
Please contact Analog Devices or its representatives for further details.
®
PRODUCT HIGHLIGHTS
1. Fast video refresh rate, 80 MHz.
2. Compatible with a wide variety of high resolution color
graphics video systems.
3. Guaranteed monotonic with a maximum differential non-
linearity of
±
0.5 LSB. Integral nonlinearity is guaranteed to
be a maximum of
±
1 LSB.
REV. B
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
ADV7120–SPECIFICATIONS
Parameter
STATIC PERFORMANCE
Resolution (Each DAC)
Accuracy (Each DAC)
Integral Nonlinearity, INL
Differential Nonlinearity, DNL
Gray Scale Error
Coding
DIGITAL INPUTS
Input High Voltage, V
INH
Input Low Voltage, V
INL
Input Current, I
IN
Input Capacitance, C
IN2
ANALOG OUTPUTS
Gray Scale Current Range
Output Current
White Level Relative to Blank
White Level Relative to Black
Black Level Relative to Blank
Blank Level on IOR, IOB
Blank Level on IOG
Sync Level on IOG
LSB Size
DAC to DAC Matching
Output Compliance, V
OC
Output Impedance, R
OUT2
Output Capacitance, C
OUT2
VOLTAGE REFERENCE
Voltage Reference Range, V
REF
Input Current, I
VREF
POWER REQUIREMENTS
V
AA
I
AA
Power Supply Rejection Ratio
Power Dissipation
DYNAMIC PERFORMANCE
Glitch Impulse
2, 3
DAC Noise
2, 3, 4
Analog Output Skew
All Versions
8
±
1
±
0.5
±
5
Binary
2
0.8
±
1
10
15
22
17.69
20.40
16.74
18.50
0.95
1.90
0
50
6.29
9.5
0
50
69.1
5
–1
+1.4
100
30
1.14/1.26
–5
5
125
100
0.5
625
500
50
200
2
(V
AA
= +5 V 5%; V
REF
= +1.235 V; R
L
= 37.5 , C
L
= 10 pF; R
SET
= 560 .
I
SYNC
connected to I0G. All Specifications T
MIN
to T
MAX1
unless otherwise noted.)
Units
Bits
LSB max
LSB max
% Gray Scale max
Test Conditions/Comments
Guaranteed Monotonic
Max Gray Scale Current: IOG = (V
REF
* 12,082/R
SET
) mA
IOR, IOB = (V
REF
* 8,627/R
SET
) mA
V min
V max
µA
max
pF max
mA min
mA max
mA min
mA max
mA min
mA max
mA min
mA max
µA
min
µA
max
mA min
mA max
µA
min
µA
max
µA
typ
% max
V min
V max
kΩ typ
pF max
V min/V max
mA typ
V nom
mA max
mA max
%/% max
mW max
mW max
pV secs typ
pV secs typ
ns max
V
IN
= 0.4 V or 2.4 V
Typically 19.05 mA
Typically 17.62 mA
Typically 1.44 mA
Typically 5
µA
Typically 7.62 mA
Typically 5
µA
Typically 2%
I
OUT
= 0 mA
V
REF
= 1.235 V for Specified Performance
Typically 80 mA: 80 MHz Parts
Typically 70 mA: 50 MHz & 35 MHz Parts
Typically 0.12%/%: f = 1 kHz, COMP = 0.1
µF
Typically 400 mW: 80 MHz Parts
Typically 350 mW: 50 MHz & 30 MHz Parts
Typically 1 ns
NOTES
1
Temperature range (T
MIN
to T
MIN
); 0°C to +70°C.
2
Sample tested at +25°C to ensure compliance.
3
TTL input values are 0 to 3 volts, with input rise/fall times
≤3
ns, measured between the 10% and 90% points. Timing reference points at 50% for inputs and
outputs. See timing notes in Figure 1.
4
This includes effects due to clock and data feedthrough as well as RGB analog crosstalk.
Specifications subject to change without notice.
–2–
REV. B
ADV7120
TIMING CHARACTERISTICS
Parameter
f
MAX
t
l
t
2
t
3
t
4
t
5
t
6
t
7
t
83
80 MHz Version
80
3
2
12.5
4
4
30
20
3
12
50
6
2
20
7
7
30
20
3
15
1
(V
AA
= +5 V
5%; V
REF
= +1.235 V; R
L
= 37.5 , C
L
= 10 pF; R
SET
= 560 .
I
SYNC
connected to IOG. All Specifications T
MIN
to T
MAX2
unless otherwise noted.)
30 MHz Version
30
8
2
33.3
9
9
30
20
3
15
Units
MHz max
ns min
ns min
ns min
ns min
ns min
ns max
ns typ
ns max
ns typ
Conditions/Comments
Clock Rate
Data & Control Setup Time
Data & Control Hold Time
Clock Cycle Time
Clock Pulse Width High Time
Clock Pulse Width Low Time
Analog Output Delay
Analog Output Rise/Fall Time
Analog Output Transition Time
50 MHz Version
NOTES
1
TTL input values are 0 to 3 volts, with input rise/fall times
≤3
ns, measured between the 10% and 90% points. Timing reference points at 50% for inputs
and outputs. See timing notes in Figure 1.
2
Temperature range (T
MIN
to T
MAX
): 0°C to +70°C
3
Sample tested at +25°C to ensure compliance.
Specifications subject to change without notice.
t
4
t
5
CLOCK
t
3
DIGITAL INPUTS
(R0-R7, G0-G7, B0-B7;
SYNC, BLANK,
REF WHITE)
t
1
DATA
t
2
t
6
ANALOG OUTPUTS
(IOR, IOG, IOB, I
SYNC
)
t
8
t
7
NOTES
1. OUTPUT DELAY (
t
) MEASURED FROM THE 50% POINT OF THE RISING EDGE OF
6
CLOCK TO THE 50% POINT OF FULL-SCALE TRANSITION.
2. TRANSITION TIME (
t
) MEASURED FROM THE 50% POINT OF FULL-SCALE
8
TRANSITION TO WITHIN 2% OF THE FINAL OUTPUT VALUE.
3. OUTPUT RISE/FALL TIME (
t
) MEASURED BETWEEN THE 10% AND 90% POINTS
7
OF FULL TRANSITION.
Figure 1. Video Input/Output Timing
REV. B
–3–
ADV7120
RECOMMENDED OPERATING CONDITIONS
Parameter
Power Supply
Ambient Operating
Temperature
Output Load
Reference Voltage
Symbol
V
AA
T
A
R
L
V
REF
Min
4.75
0
1.14
37.5
1.235
Typ
5.00
Max
5.25
+70
1.26
Units
Volts
°C
Ω
Volts
ORDERING GUIDE
Model
ADV7120KN80
ADV7120KN50
ADV7120KN30
ADV7120KP80
ADV7120KP50
ADV7120KP30
ADV7120KST50
ADV7120KST30
Speed
80 MHz
50 MHz
30 MHz
80 MHz
50 MHz
30 MHz
50 MHz
30 MHz
Temperature
Range
1
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
0°C to +70°C
Package
Option
2
N-40A
N-40A
N-40A
P-44A
P-44A
P-44A
ST-48
ST-48
ABSOLUTE MAXIMUM RATINGS
1
V
AA
to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7 V
Voltage on Any Digital Pin . . . . . GND –0.5 V to V
AA
+0.5 V
Ambient Operating Temperature (T
A
) . . . . . . . . 0°C to +70°C
Storage Temperature (T
S
) . . . . . . . . . . . . . . –65°C to +150°C
Junction Temperature (T
J
) . . . . . . . . . . . . . . . . . . . . +150°C
Soldering Temperature (10 secs) . . . . . . . . . . . . . . . . . . 300°C
Vapor Phase Soldering (1 minute) . . . . . . . . . . . . . . . . . 220°C
IOR, IOB, IOG, I
SYNC
to GND
2
. . . . . . . . . . . . . . 0 V to V
AA
NOTES
1
Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those listed in the
operational sections of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
2
Analog Output Short Circuit to any Power Supply or Common can be of an
indefinite duration.
NOTES
1
Industrial temperature range (–40°C to +85°C) version available to special
request. Please consult your local Analog Device representative.
2
N = Plastic DIP; P = Plastic Leaded Chip Carrier.
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the ADV7120 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
PIN CONFIGURATIONS
DIP
R4
R5
R6
R7
G0
G1
G2
G3
G4
G5
1
2
3
4
5
6
7
8
9
10
40 R3
WARNING!
ESD SENSITIVE DEVICE
PLCC
FS ADJUST
TQFP
GND
GND
GND
COMP
R5
R6
R3
R7
R4
R6
R5
R4
R3
R2
R7
R1
R0
39 R2
38 R1
37 R0
36 FS ADJUST
35 V
REF
34 COMP
33 IOR
32 IOG
V
REF
48 47 46 45 44 43 42 41 40 39 38 37
GND 1
36 FS ADJUST
35
V
REF
34
COMP
33 IOR
6
G0
G1
G2
7
8
9
5
4
3
2
1
44 43 42 41 40
39 IOR
38
IOG
G0 2
G1 3
G2 4
G3 5
G4 6
G5 7
G6 8
G7 9
BLANK 10
SYNC 11
V
AA
12
13 14 15 16 17 18 19 20 21 22 23 24
37 I
SYNC
36 V
AA
G3 10
G4 11
G5 12
G6 13
G7 14
BLANK 15
SYNC 16
V
AA
17
18 19 20 21 22 23 24 25 26 27 28
REF WHITE
CLOCK
GND
B1
B2
B3
B4
B5
B0
B6
B7
R2
R1
R0
NC
32 IOG
31 V
AA
30 V
AA
29 IOB
28 GND
27 GND
26 CLOCK
25 NC
31 I
SYNC
TOP VIEW
G6 11 (Not to Scale) 30 V
AA
G7 12
29
IOB
ADV7120
ADV7120
TOP VIEW
(Not to Scale)
35 V
AA
34 V
AA
33 IOB
32 GND
31 GND
30 GND
29 GND
ADV7120
TOP VIEW
(Not to Scale)
BLANK
SYNC
V
AA
13
14
15
28 GND
27 GND
26 GND
25
24
23
22
CLOCK
REF WHITE
B7
B6
B0 16
B1 17
B2 18
B3 19
B4 20
GND
B0
B1
B2
B3
B4
B5
B6
NC
GND
21 B5
NC = NO CONNECT
NOTE
For the ADV7120 in TQFP package: The REF WHITE pin is not available.
The I
SYNC
pin is not available and is internally connected to the IOG pin.
–4–
NC
B7
REV. B
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