Analog Devices ADV7122KST50, ADV7122KST30, ADV7121KP80, ADV7121KP50, ADV7121KP30 Datasheet
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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.
a
CMOS
80 MHz, Triple 10-Bit Video DACs
ADV7121/ADV7122
© 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
ADV7121 FUNCTIONAL BLOCK DIAGRAM
PIXEL
INPUT
PORT
IOR
IOG
IOB
R0
R9
CLOCK
10
ADV7121
V
REF
G0
G9
10
B0
B9
10
FS
ADJUST
10
10
10
V
AA
REFERENCE
AMPLIFIER
COMP
DAC
DAC
RED
REGISTER
BLUE
REGISTER
GREEN
REGISTER
DAC
GND
ADV7122 FUNCTIONAL BLOCK DIAGRAM
PIXEL
INPUT
PORT
IOR
IOG
IOB
R0
R9
CLOCK
10
SYNC
ADV7122
GND
G0
G9
10
B0
B9
10
BLANK
FS
ADJUST
10
10
10
V
AA
REFERENCE
AMPLIFIER
COMP
DAC
DAC
RED
REGISTER
BLUE
REGISTER
CONTROL
REGISTER
GREEN
REGISTER
DAC
SYNC
CONTROL
V
REF
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
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.
GENERAL DESCRIPTION
The ADV7121/ADV7122 (ADV®) is a video speed, digital-toanalog converter on a single monolithic chip. The part is specifically 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, including SMPTE 240M.
The ADV7121/ADV7122 is fabricated in a +5 V CMOS process. Its monolithic CMOS construction ensures greater functionality with low power dissipation. The ADV7121 is packaged
in a 0.6", 40-pin plastic DIP package. The ADV7122 is pack-
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 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.
REV. B
–2–
ADV7121–SPECIFICA TIONS
Parameter K Version Units Test Conditions/Comments
STATIC PERFORMANCE
Resolution (Each DAC) 10 Bits
Accuracy (Each DAC)
Integral Nonlinearity, INL ±2 LSB max
Differential Nonlinearity, DNL ±1 LSB max Guaranteed Monotonic
Gray Scale Error ±5 % Gray Scale max Max Gray Scale Current = (V
REF
* 7,969/R
SET
) mA
Coding Binary
DIGITAL INPUTS
Input High Voltage, V
INH
2 V min
Input Low Voltage, V
INL
0.8 V max
Input Current, I
IN
±1 µA max VIN = 0.4 V or 2.4 V
Input Capacitance, C
IN
2
10 pF max
ANALOG OUTPUTS
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
DAC to DAC Matching 5 % max Typically 2%
Output Compliance, V
OC
–1 V min
+1.4 V max
Output Impedance, R
OUT
2
100 kΩ typ
Output Capacitance, C
OUT
2
30 pF max I
OUT
= 0 mA
VOLTAGE REFERENCE
Voltage Reference Range, V
REF
1.14/1.26 V min/V max V
REF
= 1.235 V for Specified Performance
Input Current, I
VREF
–5 mA typ
POWER REQUIREMENTS
V
AA
5 V nom
I
AA
125 mA max Typically 80 mA: 80 MHz Parts
100 mA max Typically 70 mA: 50 MHz & 35 MHz Parts
Power Supply Rejection Ratio
2
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 & 35 MHz Parts
DYNAMIC PERFORMANCE
Glitch Impulse
2, 3
50 pV secs typ
DAC Noise
2, 3, 4
200 pV secs typ
Analog Output Skew 2 ns max Typically 1 ns
NOTES
1
Temperature range (T
MIN
to T
MAX
): 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.
(VAA = +5 V 6 5%; V
REF
= +1.235 V; RL = 3.75 V, CL = 10 pF; R
SET
= 560 V. All
Specifications T
MIN
to T
MAX
1
unless otherwise noted.)
ADV7121/ADV7122
–3–
REV. B
Parameter K Version Units Test Conditions/Comments
STATIC PERFORMANCE
Resolution (Each DAC) 10 Bits
Accuracy (Each DAC)
Integral Nonlinearity, INL ±2 LSB max
Differential Nonlinearity, DNL ±1 LSB max Guaranteed Monotonic
Gray Scale Error ±5 % Gray Scale max Max Gray Scale Current: IOG = (V
REF
*12.082/R
SET
) mA
Max Gray Scale Current: IOR, IOB = (V
REF
*8,627/R
SET
) mA
Coding Binary
DIGITAL INPUTS
Input High Voltage, V
INH
2 V min
Input Low Voltage, V
INL
0.8 V max
Input Current, I
IN
±1 µA max VIN = 0.4 V or 2.4 V
Input Capacitance, C
IN
2
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
Black Level on IOR, IOB 0 µA min Typically 5 µA
50 µA max
Black 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 17.28 µA typ
DAC to DAC Matching 5 % max Typically 2%
Output Compliance, V
OC
–1 V min
+1.4 V max
Output Impedance, R
OUT
2
100 kΩ typ
Output Capacitance, C
OUT
2
30 pF max I
OUT
= 0 mA
VOLTAGE REFERENCE
Voltage Reference Range, V
REF
1.14/1.26 V min/V max V
REF
= 1.235 V for Specified Performance
Input Current, I
VREF
–5 mA typ
POWER REQUIREMENTS
V
AA
5 V nom
I
AA
125 mA max Typically 80 mA: 80 MHz Parts
100 mA max Typically 70 mA: 50 MHz & 35 MHz Parts
Power Supply Rejection Ratio
2
0.5 %/% max Typically 0.12%/%: f = 1 kHz, COMP = 0.01 µF
Power Dissipation 625 mW max Typically 400 mW: 80 MHz Parts
500 mW max Typically 350 mW: 50 MHz & 35 MHz Parts
DYNAMIC PERFORMANCE
Glitch Impulse
2, 3
50 pV secs typ
DAC Noise
2, 3, 4
200 pV secs typ
Analog Output Skew 2 ns max Typically 1 ns
NOTES
1
Temperature range (T
MIN
to T
MAX
) 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
ADV7122–SPECIFICATIONS
(VAA = +5 V 6 5%; V
REF
= +1.235 V; RL = 37.5 V, CL = 10 pF; R
SET
= 560 V. All
Specifications T
MIN
to T
MAX
1
unless otherwise noted.)
ADV7121/ADV7122
–4–
REV. B
TIMING CHARACTERISTICS
1
(VAA = +5 V 6 5%; V
REF
= +1.235 V; RL = 37.5 V, CL = 10 pF; R
SET
= 560 V.
All Specifications T
MIN
to T
MAX
2
unless otherwise noted.)
Parameter 80 MHz Version 50 MHz Version 30 MHz Version Units Conditions/Comments
fmax 80 50 30 MHz max Clock Rate
t
1
3 6 8 ns min Data & Control Setup Time
t
2
2 2 2 ns min Data & Control Hold Time
t
3
12.5 20 33.3 ns min Clock Cycle Time
t
4
4 7 9 ns min Clock Pulse Width High Time
t
5
4 7 9 ns min Clock Pulse Width Low Time
t
6
30 30 30 ns max Analog Output Delay
20 20 20 ns typ
t
7
3 3 3 ns max Analog Output Rise/Fall Time
t
8
3
12 15 15 ns typ Analog Output Transition Time
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.
CLOCK
DATA
DIGITAL INPUTS
(R0–R9, G0–G9, B0–B9;
SYNC, BLANK)
t
4
t
5
t
6
t
2
t
1
t
8
t
7
ANALOG OUTPUTS
(IOR, IOG, IOB)
t
3
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 (t
8
) MEASURED FROM THE 50% POINT OF
FULL-SCALE TRANSITION TO WITHIN 2% OF THE FINAL OUTPUT
VALUE.
3. OUTPUT RISE/FALL TIME (t
7
) MEASURED BETWEEN THE 10%
AND 90% POINTS OF FULL-SCALE TRANSITION.
NOTES
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
A
0 +70 °C
Output Load R
L
37.5 Ω
Reference Voltage V
REF
1.14 1.235 1.26 Volts
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