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a
CMOS
80 MHz, Triple 10-Bit Video DACs
ADV7121/ADV7122
FEATURES
80 MHz Pipelined Operation
Triple 10-Bit D/A Converters
RS-343A/RS-170 Compatible Outputs
TTL Compatible Inputs
+5 V CMOS Monolithic Construction
40-Pin DIP Package (ADV7121)
44-Pin PLCC Package (ADV7122)
48-Lead TQFP (ADV7122)
APPLICATIONS
High Definition Television (HDTV)
High Resolution Color Graphics
CAE/CAD/CAM Applications
Image Processing
Instrumentation
Video Signal Reconstruction
Direct Digital Synthesis (DDS)
I/Q Modulation
SPEED GRADES
80 MHz
50 MHz
30 MHz
GENERAL DESCRIPTION
The ADV7121/ADV7122 (ADV®) is a video speed, digital-to-
analog converter on a single monolithic chip. The part is specifi-
cally designed for high resolution color graphics and video
systems including high definition television (HDTV). It is also
ideal for any application requiring a low cost, high speed DAC
function especially in communications. It consists of three, high
speed, 10-bit, video D/A converters (RGB), a standard TTL input
interface and high impedance, analog output, current sources.
The ADV7121/ADV7122 has three separate, 10-bit, pixel input
ports, one each for red, green and blue video data. A single +5 V
power supply, an external 1.23 V reference and pixel clock input is
all that is required to make the part operational. The ADV7122
has additional video control signals, composite SYNC and BLANK.
The ADV7121/ADV7122 is capable of generating RGB video
output signals which are compatible with RS-343A, RS-170 and
most proposed production system HDTV video standards, in-
cluding SMPTE 240M.
The ADV7121/ADV7122 is fabricated in a +5 V CMOS pro-
cess. Its monolithic CMOS construction ensures greater func-
tionality with low power dissipation. The ADV7121 is packaged
in a 0.6", 40-pin plastic DIP package. The ADV7122 is pack-
ADV is a registered trademark of Analog Devices, Inc.
*Speed grades up to 140 MHz are also available on special request.
Please contact Analog Devices or its representatives for details.
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.
ADV7121 FUNCTIONAL BLOCK DIAGRAM
FS
VAA ADJUST VREF
CLOCK
ADV7121
REFERENCE
AMPLIFIER
COMP
R0
R9
PIXEL
INPUT
PORT
G0
G9
B0
B9
RED
10
10 REGISTER
GREEN 10
10 REGISTER
BLUE
10
10 REGISTER
DAC
DAC
DAC
IOR
IOG
IOB
GND
ADV7122 FUNCTIONAL BLOCK DIAGRAM
FS
VAA ADJUST VREF
CLOCK
ADV7122
REFERENCE
AMPLIFIER
COMP
R0
R9
PIXEL
INPUT
PORT
G0
G9
B0
B9
RED 10
10 REGISTER
GREEN 10
10 REGISTER
BLUE 10
10 REGISTER
DAC
DAC
DAC
IOR
IOG
IOB
BLANK
SYNC
CONTROL
REGISTER
SYNC
CONTROL
GND
aged in a 44-pin plastic leaded (J-lead) chip carrier, PLCC,
and 48-lead thin quad flatpack (TQFP).
PRODUCT HIGHLIGHTS
1. Fast video refresh rate, 80 MHz.
2. Guaranteed monotonic to 10 bits. Ten bits of resolution al-
lows for implementation of linearization functions such as
gamma correction and contrast enhancement.
3. Compatible with a wide variety of high resolution color
graphics systems including RS-343A/RS-170 and the pro-
posed SMPTE 240M standard for HDTV.
© Analog Devices, Inc., 1996
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703

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ADV7121–SPECIFICATIONS (VAA = +5 V ؎ 5%; VREF = +1.235 V; RL = 3.75 , CL = 10 pF; RSET = 560 . All
Specifications TMIN to TMAX1 unless otherwise noted.)
Parameter
K Version
Units
Test Conditions/Comments
STATIC PERFORMANCE
Resolution (Each DAC)
Accuracy (Each DAC)
Integral Nonlinearity, INL
Differential Nonlinearity, DNL
Gray Scale Error
Coding
10
±2
±1
±5
Bits
LSB max
LSB max
% Gray Scale max
Binary
Guaranteed Monotonic
Max Gray Scale Current = (VREF * 7,969/RSET) mA
DIGITAL INPUTS
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current, IIN
Input Capacitance, CIN2
ANALOG OUTPUTS
Gray Scale Current Range
Output Current
White Level
Black Level
LSB Size
DAC to DAC Matching
Output Compliance, VOC
Output Impedance, ROUT2
Output Capacitance, COUT2
VOLTAGE REFERENCE
Voltage Reference Range, VREF
Input Current, IVREF
POWER REQUIREMENTS
VAA
IAA
Power Supply Rejection Ratio2
Power Dissipation
2
0.8
±1
10
15
22
16.74
18.50
0
50
17.28
5
–1
+1.4
100
30
1.14/1.26
–5
5
125
100
0.5
625
500
V min
V max
µA max
pF max
mA min
mA max
mA min
mA max
µA min
µA max
µA typ
% max
V min
V max
ktyp
pF max
V min/V max
mA typ
V nom
mA max
mA max
%/% max
mW max
mW max
VIN = 0.4 V or 2.4 V
Typically 17.62 mA
Typically 5 µA
Typically 2%
IOUT = 0 mA
VREF = 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 & 35 MHz Parts
DYNAMIC PERFORMANCE
Glitch Impulse2, 3
DAC Noise2, 3, 4
Analog Output Skew
50
200
2
pV secs typ
pV secs typ
ns max
Typically 1 ns
NOTES
1Temperature range (TMIN to TMAX): 0°C to +70°C.
2Sample tested at +25°C to ensure compliance.
3TTL 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.
4This includes effects due to clock and data feedthrough as well as RGB analog crosstalk.
Specifications subject to change without notice.
–2– REV. B

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ADV7121/ADV7122
ADV7122–SPECIFICATIONS (VAA = +5 V ؎ 5%; VREF = +1.235 V; RL = 37.5 , CL = 10 pF; RSET = 560 . All
Specifications TMIN to TMAX1 unless otherwise noted.)
Parameter
K Version Units
Test Conditions/Comments
STATIC PERFORMANCE
Resolution (Each DAC)
Accuracy (Each DAC)
Integral Nonlinearity, INL
Differential Nonlinearity, DNL
Gray Scale Error
10
±2
±1
±5
Coding
Bits
LSB max
LSB max
% Gray Scale max
Binary
Guaranteed Monotonic
Max Gray Scale Current: IOG = (VREF*12.082/RSET) mA
Max Gray Scale Current: IOR, IOB = (VREF*8,627/RSET) mA
DIGITAL INPUTS
Input High Voltage, VINH
Input Low Voltage, VINL
Input Current, IIN
Input Capacitance, CIN2
ANALOG OUTPUTS
Gray Scale Current Range
Output Current
White Level Relative to Blank
White Level Relative to Black
Black Level Relative to Blank
Black Level on IOR, IOB
Black Level on IOG
Sync Level on IOG
LSB Size
DAC to DAC Matching
Output Compliance, VOC
Output Impedance, ROUT2
Output Capacitance, COUT2
VOLTAGE REFERENCE
Voltage Reference Range, VREF
Input Current, IVREF
POWER REQUIREMENTS
VAA
IAA
Power Supply Rejection Ratio2
Power Dissipation
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
17.28
5
–1
+1.4
100
30
1.14/1.26
–5
5
125
100
0.5
625
500
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
ktyp
pF max
V min/V max
mA typ
V nom
mA max
mA max
%/% max
mW max
mW max
VIN = 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%
IOUT = 0 mA
VREF = 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 = 0.01 µF
Typically 400 mW: 80 MHz Parts
Typically 350 mW: 50 MHz & 35 MHz Parts
DYNAMIC PERFORMANCE
Glitch Impulse2, 3
DAC Noise2, 3, 4
Analog Output Skew
50
200
2
pV secs typ
pV secs typ
ns max
Typically 1 ns
NOTES
1Temperature range (TMIN to TMAX) 0°C to +70°C.
2Sample tested at +25°C to ensure compliance.
3TTL 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.
4This includes effects due to clock and data feedthrough as well as RGB analog crosstalk.
Specifications subject to change without notice
REV. B
–3–

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ADV7121/ADV7122
TIMING CHARACTERISTICS1
(VAA = +5 V ؎ 5%; VREF = +1.235 V; RL = 37.5 , CL = 10 pF; RSET = 560 .
All Specifications TMIN to TMAX2 unless otherwise noted.)
Parameter 80 MHz Version 50 MHz Version 30 MHz Version Units
Conditions/Comments
fmax
t1
t2
t3
t4
t5
t6
t7
t83
80
3
2
12.5
4
4
30
20
3
12
50
6
2
20
7
7
30
20
3
15
30 MHz max Clock Rate
8
ns min
Data & Control Setup Time
2
ns min
Data & Control Hold Time
33.3
ns min
Clock Cycle Time
9
ns min
Clock Pulse Width High Time
9
ns min
Clock Pulse Width Low Time
30
ns max
Analog Output Delay
20 ns typ
3
ns max
Analog Output Rise/Fall Time
15
ns typ
Analog Output Transition Time
NOTES
1TTL 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.
2Temperature range (TMIN to TMAX): 0°C to +70°C.
3Sample tested at +25°C to ensure compliance.
Specifications subject to change without notice.
CLOCK
DIGITAL INPUTS
(R0–R9, G0–G9, B0–B9;
SYNC, BLANK)
ANALOG OUTPUTS
(IOR, IOG, IOB)
t3
t4 t5
t1 t2
DATA
t6 t8
t7
NOTES
1. OUTPUT DELAY (t6) MEASURED FROM THE 50% POINT OF THE
RISING EDGE OF THE CLOCK TO THE 50% POINT OF
FULL-SCALE TRANSITION.
2. TRANSITION TIME (t8) MEASURED FROM THE 50% POINT OF
FULL-SCALE TRANSITION TO WITHIN 2% OF THE FINAL OUTPUT
VALUE.
3. OUTPUT RISE/FALL TIME (t7) MEASURED BETWEEN THE 10%
AND 90% POINTS OF FULL-SCALE TRANSITION.
4 SYNC AND BLANK DIGITAL INPUTS ARE NOT PROVIDED ON
Figure 1. Video Input/Output Timing
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Min Typ Max
Power Supply
Ambient Operating
Temperature
Output Load
Reference Voltage
VAA
TA
RL
VREF
4.75 5.00 5.25
0 +70
37.5
1.14 1.235 1.26
Units
Volts
°C
Volts
–4– REV. B

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ABSOLUTE MAXIMUM RATINGS1
VAA to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7 V
Voltage on Any Digital Pin . . . . . GND –0.5 V to VAA + 0.5 V
Ambient Operating Temperature (TA) . . . . . . . . 0°C to +70°C
Storage Temperature (TS) . . . . . . . . . . . . . . –65°C to +150°C
Junction Temperature (TJ) . . . . . . . . . . . . . . . . . . . . +150°C
Soldering Temperature (5 secs) . . . . . . . . . . . . . . . . . . . 220°C
Vapor Phase Soldering (1 minute) . . . . . . . . . . . . . . . . . 220°C
IOR, IOB, IOG to GND2 . . . . . . . . . . . . . . . . . . . 0 V to VAA
ADV7121/ADV7122
NOTES
1Stresses 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.
2Analog output short circuit to any power supply or common can be of an indefinite
duration.
DIP (N-40A) Package
PIN CONFIGURATIONS
PLCC (P-44A) Package
R6 1
R7 2
R8 3
R9 4
G0 5
G1 6
G2 7
G3 8
G4 9
G5 10
G6 11
G7 12
G8 13
G9 14
VAA 15
B0 16
B1 17
B2 18
B3 19
B4 20
ADV7121 DIP
TOP VIEW
(Not to Scale)
40 R5
39 R4
38 R3
37 R2
36 R1
35 R0
34 FS ADJUST
33 VREF
32 COMP
31 IOR
30 IOG
29 VAA
28 IOB
27 GND
26 CLOCK
25 B9
24 B8
23 B7
22 B6
21 B5
6 5 4 3 2 1 44 43 42 41 40
G1 7
G2 8
G3 9
G4 10
G5 11
G6 12
G7 13
G8 14
G9 15
BLANK 16
SYNC 17
ADV7122 PLCC
TOP VIEW
(Not to Scale)
39 FS ADJUST
38 VREF
37 COMP
36 IOR
35 IOG
34 VAA
33 VAA
32 IOB
31 GND
30 GND
29 CLOCK
18 19 20 21 22 23 24 25 26 27 28
ORDERING GUIDE
Model
Speed
Temperature Package
Range*
Description
Package
Option
ADV7121KN80 80 MHz 0°C to +70°C
ADV7121KN50 50 MHz 0°C to +70°C
ADV7121KN30 30 MHz 0°C to +70°C
40-Pin Plastic DIP
40-Pin Plastic DIP
40-Pin Plastic DIP
N-40A
N-40A
N-40A
ADV7122KP80 80 MHz 0°C to +70°C
ADV7122KP50 50 MHz 0°C to +70°C
ADV7122KP30 30 MHz 0°C to +70°C
44-Lead Plastic Leaded Chip Carrier (PLCC) P-44A
44-Lead Plastic Leaded Chip Carrier (PLCC) P-44A
44-Lead Plastic Leaded Chip Carrier (PLCC) P-44A
ADV7122KST50 50 MHz 0°C to +70°C 48-Lead Thin Quad Flatpack (TQFP)
ADV7122KST30 30 MHz 0°C to +70°C 48-Lead Thin Quad Flatpack (TQFP)
ST-48
ST-48
*Industrial Temperature range (–40°C to +85°C) parts are also available to special ranges. Please contact your local Analog Devices
representative.
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 ADV7121/ADV7122 feature proprietary ESD protection circuitry, permanent
damage may occur on devices subjected to high energy electrostatic discharges. Therefore, p roper
ESD precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
REV. B
–5–