Analog Devices ADV7120 Datasheet

CMOS

REF WHITE

PIXEL

INPUT

PORT

IOR

IOG

IOB

R0
R7

CLOCK

8

SYNC

ADV7120

V

REF

GND

G0
G7

8

B0
B7

8

BLANK

FS

ADJUST

8

8

8

I

SYNC

V

AA

REFERENCE
AMPLIFIER

COMP

DAC

CONTROL
REGISTER

SYNC

CONTROL

RED

REGISTER

GREEN

REGISTER

BLUE

REGISTER

DAC

DAC

a

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

80 MHz, Triple 8-Bit Video DAC

ADV7120

FUNCTIONAL BLOCK DIAGRAM

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 inter­face 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 refer­ence 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 sig­nals, 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 car­rier, PLCC. The ADV7120 is also available in a very small 48­lead 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 non­linearity 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: [phone] Fax: [phone]

ADV7120–SPECIFICATIONS

(VAA = +5 V 6 5%; V
I

connected to I0G. All Specifications T

SYNC

= +1.235 V; RL = 37.5 V, CL = 10 pF; R

REF

MIN

1

to T

unless otherwise noted.)

MAX

= 560 V.

SET

Parameter All Versions Units Test Conditions/Comments

STATIC PERFORMANCE

Resolution (Each DAC) 8 Bits
Accuracy (Each DAC)

Integral Nonlinearity, INL ±1 LSB max
Differential Nonlinearity, DNL ±0.5 LSB max Guaranteed Monotonic
Gray Scale Error ±5 % Gray Scale max Max Gray Scale Current: IOG = (V

IOR, IOB = (V

* 12,082/R

REF

REF

* 8,627/R

SET

) mA

) mA

SET

Coding Binary

DIGITAL INPUTS

Input High Voltage, V
Input Low Voltage, V
Input Current, I
Input Capacitance, C

INL

IN

IN

INH

2

2 V min

0.8 V max
±1 µA max VIN = 0.4 V or 2.4 V
10 pF max

ANALOG OUTPUTS

Gray Scale Current Range 15 mA min

22 mA max

Output Current

White Level Relative to Blank 17.69 mA min Typically 19.05 mA

20.40 mA max

White Level Relative to Black 16.74 mA min Typically 17.62 mA

18.50 mA max

Black Level Relative to Blank 0.95 mA min Typically 1.44 mA

1.90 mA max

Blank Level on IOR, IOB 0 µA min Typically 5 µA

50 µA max

Blank Level on IOG 6.29 mA min Typically 7.62 mA

9.5 mA max

Sync Level on IOG 0 µA min Typically 5 µA

50 µA max

LSB Size 69.1 µA typ
DAC to DAC Matching 5 % max Typically 2%
Output Compliance, V

Output Impedance, R

OC

OUT

Output Capacitance, C

OUT

2

2

–1 V min
+1.4 V max
100 kΩ typ
30 pF max I

OUT

= 0 mA

VOLTAGE REFERENCE

Voltage Reference Range, V
Input Current, I

VREF

REF

1.14/1.26 V min/V max V
–5 mA typ

= 1.235 V for Specified Performance

REF

POWER REQUIREMENTS

V

AA

I

AA

5 V nom
125 mA max Typically 80 mA: 80 MHz Parts

100 mA max Typically 70 mA: 50 MHz & 35 MHz Parts
Power Supply Rejection Ratio 0.5 %/% max Typically 0.12%/%: f = 1 kHz, COMP = 0.1 µF
Power Dissipation 625 mW max Typically 400 mW: 80 MHz Parts

500 mW max Typically 350 mW: 50 MHz & 30 MHz Parts

DYNAMIC PERFORMANCE

Glitch Impulse
DAC Noise

2, 3, 4

2, 3

50 pV secs typ

200 pV secs typ
Analog Output Skew 2 ns max Typically 1 ns

NOTES

1

Temperature range (T

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.

MIN

to T

MIN

); 0°C to +70°C.

–2–

REV. B

ADV7120

TIMING CHARACTERISTICS

(VAA = +5 V 6 5%; V

1

I

connected to IOG. All Specifications T

SYNC

= +1.235 V; RL = 37.5 V, CL = 10 pF; R

REF

MIN

2

to T

unless otherwise noted.)

MAX

= 560 V.

SET

Parameter 80 MHz Version 50 MHz Version 30 MHz Version Units Conditions/Comments

f

MAX

t

l

t

2

t

3

t

4

t

5

t

6

80 50 30 MHz max Clock Rate
3 6 8 ns min Data & Control Setup Time
2 2 2 ns min Data & Control Hold Time

12.5 20 33.3 ns min Clock Cycle Time
4 7 9 ns min Clock Pulse Width High Time
4 7 9 ns min Clock Pulse Width Low Time
30 30 30 ns max Analog Output Delay
20 20 20 ns typ

t

7

3

t

8

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

3

Sample tested at +25°C to ensure compliance.

Specifications subject to change without notice.

3 3 3 ns max Analog Output Rise/Fall Time
12 15 15 ns typ Analog Output Transition Time

to T

MIN

): 0°C to +70°C

MAX

CLOCK

DIGITAL INPUTS

(R0-R7, G0-G7, B0-B7;

SYNC, BLANK,

REF WHITE)

t

t

4

5

1

DATA

t

2

t

t

8

6

t

3

t

ANALOG OUTPUTS

(IOR, IOG, IOB, I

)

SYNC

NOTES

1. OUTPUT DELAY (
CLOCK TO THE 50% POINT OF FULL-SCALE TRANSITION.

2. TRANSITION TIME (
TRANSITION TO WITHIN 2% OF THE FINAL OUTPUT VALUE.

3. OUTPUT RISE/FALL TIME (
OF FULL TRANSITION.

t

) MEASURED FROM THE 50% POINT OF THE RISING EDGE OF

6

t

) MEASURED FROM THE 50% POINT OF FULL-SCALE

8

t

) MEASURED BETWEEN THE 10% AND 90% POINTS

7

Figure 1. Video Input/Output Timing

t

7

REV. B

–3–

ADV7120

IOR
IOG

V

AA

IOB

CLOCK

V

AA

G0
G1

G4
G5
G6

G2
G3

R7

R6

R3

R2

R1

R5

B0

B1

B4

B5

B6

B2

B3

R4

FS ADJUST

V

REF

COMP

NC

GND

B7

R0

GND
GND

GND

GND

V

AA

G7

44

2

6

4
5

18

1

35
34
33

37

36

3

7
8

11
12

13

9

10

203921 242322

38

404142

25

28
27
26

43

31
30
29

32

15 16 1714

TOP VIEW

(Not to Scale)

ADV7120

BLANK

SYNC

48 47 46 45

19

GND

GND

NC

NC

GND

NC

NC = NO CONNECT

RECOMMENDED OPERATING CONDITIONS

ORDERING GUIDE

Parameter Symbol Min Typ Max Units

Power Supply V

AA

4.75 5.00 5.25 Volts

Ambient Operating

Temperature T
Output Load R
Reference Voltage V

A
L
REF

ABSOLUTE MAXIMUM RATINGS

0 +70 °C

37.5 Ω

1.14 1.235 1.26 Volts

1

VAA to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7 V

Voltage on Any Digital Pin . . . . . GND –0.5 V to V

Ambient Operating Temperature (T
Storage Temperature (T
Junction Temperature (T

) . . . . . . . . . . . . . . –65°C to +150°C

S

) . . . . . . . . . . . . . . . . . . . . +150°C

J

) . . . . . . . . 0°C to +70°C

A

+0.5 V

AA

Soldering Temperature (10 secs) . . . . . . . . . . . . . . . . . .300°C

Model Speed Range

ADV7120KN80 80 MHz 0°C to +70°C N-40A
ADV7120KN50 50 MHz 0°C to +70°C N-40A
ADV7120KN30 30 MHz 0°C to +70°C N-40A
ADV7120KP80 80 MHz 0°C to +70°C P-44A
ADV7120KP50 50 MHz 0°C to +70°C P-44A
ADV7120KP30 30 MHz 0°C to +70°C P-44A
ADV7120KST50 50 MHz 0°C to +70°C ST-48
ADV7120KST30 30 MHz 0°C to +70°C ST-48

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.

Vapor Phase Soldering (1 minute) . . . . . . . . . . . . . . . . .220°C

IOR, IOB, IOG, I

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.

to GND2 . . . . . . . . . . . . . . 0 V to V

SYNC

AA

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.

Temperature Package

1

Option

WARNING!

ESD SENSITIVE DEVICE

2

R5

R6

B2

B1

PLCC

R4

3

2645

ADV7120

TOP VIEW

(Not to Scale)

21 24

22182019

B3

DIP

R4

1

R5

2

R6

3

R7

4

G0

5

G1

6

G2

7
833

G3 IOR

932

G4 IOG

ADV7120

10 31

G5 I

TOP VIEW

G6 V

1111

(Not to Scale)

G7 IOB

BLANK

SYNC

V

AA

B0 CLOCK
B1 REF WHITE
B2 B7
B3
B4 B5

NOTE
For the ADV7120 in TQFP package: The REF WHITE pin is not available.
The I

12 29
13
14 27
15 26
16 25
17 24
18 23
19
20 21

pin is not available and is internally connected to the IOG pin.

SYNC

40
39
38
37
36
35
34

30

28

22

R3
R2
R1
R0
FS ADJUST
V

REF

COMP

SYNC

AA

GND
GND
GND

B6

R7

7

G0

8

G1
G2

9

10

G3

11

G4

12

G5

13

G6

14

G7

15

BLANK

SYNC

V

16
17

AA

B0

PIN CONFIGURATIONS

REF

R2

R3

R1

1

44

23

B5

B4

B6

V

R0

FS ADJUST

41

42

43

25 28

26

27

B7

CLOCK

REF WHITE

40

COMP

GND

39

IOR

38

IOG

37

I

SYNC

36

V

AA

35

V

AA

34

V

AA

33

IOB

32

GND

31

GND

30

GND

29

GND

–4–

TQFP

REV. B