Analog Devices ADV7128 Datasheet

CMOS

a

FEATURES
80 MHz Pipelined Operation
10-Bit D/A Converters
RS-343A/RS-170 Compatible Outputs
TTL Compatible Inputs
+5 V CMOS Monolithic Construction
28-Pin SOIC Package

APPLICATIONS
High Definition Television (HDTV)
High Resolution Color Graphics
Digital Radio Modulation
CAE/CAD/CAM Applications
Image Processing
Instrumentation
Video Signal Reconstruction
Direct Digital Synthesis (DDS) & I/O Modulation
Wireless LAN
Wireless Local Loop

SPEED GRADES
80 MHz
50 MHz
30 MHz

CLOCK

80 MHz, 10-Bit Video DAC

ADV7128

FUNCTIONAL BLOCK DIAGRAM

V

AA

ADV7128

D0
D9

10

GND

FS

ADJUST

DATA

REGISTER

V

REF

REFERENCE
AMPLIFIER

10

DAC

COMP

I

OUT

GENERAL DESCRIPTION

The ADV7128 (ADV) is a video speed, digital-to-analog con­verter on a single monolithic chip. It consists of a high speed,
10-bit, video D/A converters; a standard TTL input interface;
and a high impedance, analog output, current source.

The ADV7128 has a 10-bit pixel input port. A single +5 V
power supply, an external 1.23 V reference and pixel clock input
are and all that are required to make the part operational.

The ADV7128 is capable of generating video output signals
which are compatible with RS-343A, RS-170 and most pro­posed production system HDTV video standards, including
SMPTE 240M.

The ADV7128 is fabricated in a +5 V CMOS process. Its
monolithic CMOS construction ensures greater functionality
with low power dissipation. The ADV7128 is available in a 28­lead small outline IC (SOIC).

ADV is a registered trademark of Analog Devices, Inc.

PRODUCT HIGHLIGHTS

1. Fast video refresh rate, 80 MHz.

2. Guaranteed monotonic to 10 bits. Ten bits of resolution al­lows 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 pro­posed SMPTE 240M standard for HDTV.

4. Combined with a numerically controlled oscillator (AD9955),
it forms a complete frequency synthesizer (DDS).

5. Using the parts reduced power output DAC modes, it is
ideal for power and cost sensitive communications type
applications.

REV. 0

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]

ADV7128–SPECIFICA TIONS

(VAA = +5 V 6 5%; V
All specifications T

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

REF

1

to T

MIN

unless otherwise noted.)

MAX

= 560 V.

SET

Parameter K Version Units Test Conditions/Comments

STATIC PERFORMANCE

Resolution 10 Bits
Accuracy

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

* 7,969/R

REF

SET

) mA

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 OUTPUT

Gray Scale Current Range 15 mA min

22 mA max

Output Current

White Level 16.74 mA min Typically 17.62 mA

18.50 mA max

Black Level 0 µA min Typically 5 µA

50 µA max

LSB Size 17.28 µA typ

Output Compliance, V
Output Impedance, R

OC

OUT

Output Capacitance, C

OUT

2

2

0 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

Power Supply Rejection Ratio

2

5 V nom
125 mA max Typically 80 mA: 80 MHz Parts
100 mA max Typically 70 mA: 50 MHz & 35 MHz Parts

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

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.

Specifications subject to change without notice.

2, 3, 4

2, 3

MIN

to T

MAX

50 pV secs typ
200 pV secs typ

); 0°C to +70°C.

–2–

REV. 0

ADV7128

TIMING CHARACTERISTICS

(VAA = +5 V 6 5%; V

1

All specifications T

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

REF

2

to T

MIN

unless otherwise noted.)

MAX

= 560 V.

SET

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

f

MAX

t

1

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

t

t

4

5

t

3

t

t

1

2

DIGITAL INPUTS

D0–D9

ANALOG OUTPUTS

NOTES

1. OUTPUT DELAY (
POINT OF FULL-SCALE TRANSITION.

2. TRANSITION TIME (
FINAL OUTPUT VALUE.

3. OUTPUT RISE/FALL TIME (

(I

)

OUT

t

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

6

t

) MEASURED FROM THE 50% POINT OF FULL-SCALE TRANSITION TO WITHIN 2% OF THE

8

t

) MEASURED BETWEEN THE 10% AND 90% POINTS OF FULL-SCALE TRANSITION.

7

Figure 1. Video Input/Output Timing

RECOMMENDED OPERATING CONDITIONS

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

0 +70 °C

37.5 Ω

1.14 1.235 1.26 Volts

DATA

t

t

8

6

t

7

ORDERING GUIDE

Accuracy Temperature Package

Model Speed DNL INL Range Option*

ADV7128KR80 80 MHz ±1 ±10°C to +70°C R-28
ADV7128KR50 50 MHz ±1 ±10°C to +70°C R-28
ADV7128KR30 30 MHz ±1 ±10°C to +70°C R-28

*R = SOIC.

REV. 0

–3–