AD9701BQ ,250 MSPS Video Digital-to-Analog ConverterGENERAL DESCRIPTIONThe AD9701 is a high speed, 8-bit digital-to-analog converterwith fully integrat ..
AD9701SE ,250 MSPS Video Digital-to-Analog ConverterSPECIFICATIONS1ABSOLUTE MAXIMUM RATINGS Operating Temperature RangeSupply Voltage (–V ) . . . . . . ..
AD9701SQ ,250 MSPS Video Digital-to-Analog ConverterFEATURES250 MSPS Update RateLow Glitch ImpulseComplete Composite FunctionsInternal Voltage Referenc ..
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ADS8320E/2K5 ,16-Bit, High-Speed, 2.7V to 5V Micro Power Sampling Analog-to-Digital Converterfeatures operation from 2 V to• Serial (SPI™/SSI) Interface5.25 V, a synchronous serial (SPI/SSI co ..
ADS8320EB ,Brown Corporation - 16-Bit, High-Speed, 2.7V to 5V microPower Sampling ANALOG-TO-DIGITAL CONVERTER
ADS8320EB/250G4 ,16-Bit, High-Speed, 2.7V to 5V Micro Power Sampling Analog-to-Digital Converter 8-VSSOP -40 to 85Features... 18 Application and Implementation...... 162 Applications..... 18.1 Application Informat ..
ADS8321E/250 ,16-Bit, High Speed, MicroPower Sampling Analog-to-Digital ConverterMAXIMUM RATINGSELECTROSTATICV .... +6VCCDISCHARGE SENSITIVITYAnalog Input ....... –0.3V to (V + 0.3 ..
ADS8321E/250G4 ,16-Bit, High Speed, MicroPower Sampling Analog-to-Digital Converter 8-VSSOP -40 to 85SPECIFICATIONS: +V = +5VCC At –40°C to +85°C, V = +2.5V, –In = 2.5V, f = 100kHz, and f = 24 • f , u ..
ADS8321E/2K5 ,16-Bit, High Speed, MicroPower Sampling Analog-to-Digital Converterfeatures a synchronous serial (SPI/SSI* PIN-COMPATIBLE TO ADS7816 AND ADS7822 compatible) interface ..
AD9701BQ-AD9701SE-AD9701SQ
250 MSPS Video Digital-to-Analog Converter
REV.A
250 MSPS Video
Digital-to-Analog Converter
FUNCTIONAL BLOCK DIAGRAM
GENERAL DESCRIPTIONThe AD9701 is a high speed, 8-bit digital-to-analog converter
with fully integrated composite video functions. High speed
ECL input registers provide synchronous operation of data and
control functions up to 250 MSPS.
The AD9701 incorporates onboard control functions including
horizontal sync, blanking, reference white level and a 10%
bright signal for highlighting. The setup level is also adjustable
from 0 IRE units to 20 IRE units through the control pin. An
internal voltage reference allows the AD9701 to operate as a
stand-alone video reconstruction DAC.
The AD9701 is available as an industrial temperature range
device, –25°C to +85°C, and as an extended temperature range
device, –55°C to +125°C. Both grades of the AD9701 are pack-
aged in a 22-pin ceramic DIP with the extended temperature
device also available in a 28-pin LCC package.
PIN CONFIGURATIONS
FEATURES
250 MSPS Update Rate
Low Glitch Impulse
Complete Composite Functions
Internal Voltage Reference
Single –5.2 V Supply
APPLICATIONS
Raster Scan Displays
Color Graphics
Automated Test Equipment
TV Video Reconstruction
ELECTRICAL CHARACTERISTICSINITIAL OFFSET ERROR
ANALOG OUTPUT
SETUP CONTROL
DIGITAL INPUTS
AD9701–SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS1Supply Voltage (–VS) . . . . . . . . . . . . . . . . . . . . . . . . . . . .–7 V
Digital Input Voltages (Including STROBE, SYNC,
BLANKING, 10% BRIGHT and REFERENCE
WHITE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 V to –VS
Analog Output Current . . . . . . . . . . . . . . . . . . . . . . . .37 mA
Power Dissipation (+25°C Free Air)2 . . . . . . . . . . . .780 mW
Operating Temperature Range
AD9701BQ . . . . . . . . . . . . . . . . . . . . . . . .–25°C to +85°C
AD9701SQ/SE . . . . . . . . . . . . . . . . . . . . .–55°C to +125°C
Storage Temperature Range . . . . . . . . . . . .–65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . .+175°C
Lead Soldering Temperature (10 sec) . . . . . . . . . . . .+300°C
(Supply Voltages = –5.2 V; RL = 37.5 V; Setup = 0 V, unless otherwise noted)
NOTESAbsolute maximum ratings are limiting values to be applied individually, and beyond which serviceability of the circuit may be impaired. Functional operability under
any of these conditions is not necessarily implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.Typical thermal impedance . . .
22-Pin CeramicθJA = 64°C/W; θJC = 16°C/W
28-Pin Ceramic LCCθJA = 70°C/W θJC = 21°C/WSYNC, BLANKING, and REFERENCE WHITE are inactive (Logic “1”). ISET ≈ 1.26 V/RSET.All bits at logic HIGH.All values are relative to full-scale output after being normalized to nominal value. Typical variation in full-scale output from device to device can reach ±10%, for a
fixed RSET resistor.
6The effect of 10% BRIGHT algebraically adds to the output waveform.The output level with BLANKING active (Logic “0”) is determined by the setup control level.In normal operation, the BLANKING input is activated (Logic “0”) prior to or in conjunction with the SYNC input. The effect of the SYNC output is relative to the
setup level.Measured from edge of STROBE to 50% transition point of the output signal.Measured with full-scale change in output level, from the 10% transition level to within ±0.2% of the final output value.
11Measured from 10% to 90% transition point for full-scale step output.An IRE unit is 1% of the Grey Scale (GS range) with a 0 IRE setup level.Supply Voltage should remain stable within ±5% for normal operation.Measured at ±5% of –VS.
Specifications subject to change without notice.
DIGITAL INPUTS VS. ANALOG OUTPUTNOTESSetup (Pin 21) grounded (0 IRE units).Setup (Pin 21) open (7.5 IRE units).Setup (Pin 21) to –5.2 V through 1 k (0 IRE units).Setup (Pin 21) to –5.2 V (20 IRE units).
ORDERING GUIDE
AD9701
FUNCTIONAL DESCRIPTIONCOMPENSATION
CURRENT SET
OUTPUT
SYSTEM TIMING DIAGRAMS
DIE LAYOUT AND MECHANICAL INFORMATIONDie Dimensions . . . . . . . . . . . . . . . .107 3 104 3 15 (±2) mils
Pad Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . .4 3 4 mils
Metalization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Aluminum
Backing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .None
Substrate Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .–VS
Passivation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Oxynitride
Die Attach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Gold Eutectic
Bond Wire . . . . . . .1.25 mil Aluminum; Ultrasonic Bonding or
1 mil Gold; Gold Ball Bonding
APPLICATIONS INFORMATIONRaster scan video displays image data on a line by line basis,
with timing and control signals inserted between the lines. The
control signals include the horizontal synchronization pulses,
which are used to align the display circuitry at the beginning of
each line. After the complete video image is displayed on the
monitor, the process begins again with the next image. The ver-
tical reset pulse(s) that initiate this timing sequence are located
between each video image.
signals are designed to fall below the blanking level so as not to
be seen on the monitor. The actual image data is located above
the blanking level and it may be further separated from the tim-
ing signal by the setup level. The setup level is simply a buffer
zone between the timing and image data.
Generation of the timing signals for the AD9701 is controlled
by the COMPOSITE BLANKING and the COMPOSITE
SYNC inputs. In normal operation, the output level of the
AD9701 is forced to the blanking level (black) with the COM-
POSITE BLANKING control so that when the synchronization
occurs, it will not interfere (be seen) with the monitor image.
The COMPOSITE SYNC control forces the output level below
the blanking level, generating the synchronization pulse.
The “grey scale” is the image intensity range located above the
blanking level by the amount of the setup level. The setup level
is “reference black,” the darkest displayable picture intensity.
The top of the “grey scale” is “reference white” or the brightest
picture intensity. As an 8-bit device, the AD9701 divides the
“gray scale” into 256 individual levels.
Normal raster scan waveforms divide the region between the
blanking level and reference white into 100 IRE units (Interna-
tional Radio Engineers). The setup level can range from 0 to 20
IRE units but typically is around 10 IRE units, and the synchro-
nization pulse level typically falls 40 IRE units below the blank-
ing level. For the AD9701, the reference white level is 10 IRE
units below the full-scale output range (0 mAOUT).
In terms of priority, the REFERENCE WHITE control over-
rides the data inputs, but both COMPOSITE SYNC and
COMPOSITE BLANKING override the data inputs and the
REFERENCE WHITE control. A fourth control is active at all
times, 10% BRIGHT, which adds approximately 10 IRE units
to the output level no matter what the input state of the
AD9701. The 10% BRIGHT control is primarily used to high-
light areas of the video image.
As with any high-speed device, the AD9701 requires a substan-
tial low impedance ground plane and high quality ground con-
nections to achieve the best performance. Performance can also
be improved with adequate power supply decoupling near the
supply pins of the AD9701. In ECL mode, the output of the
AD9701 is designed to drive 75 Ω cable directly, with 75 Ω ter-
minations to ground at both ends of the cable. For TTL con-
figurations, the output should be terminated to +5.0 V through
an 82 Ω resistor (see circuit below).
AD9701
OUTLINE DIMENSIONSDimensions shown in inches and (mm).
C1127–9–9/87
PRINTED IN U.S.A.
22-Pin Side-Brazed DIP22-Pin Ceramic DIP
28-Pin LCC
