MDSL-0825_15 Datasheet, PDF (1/8 Pages) Analog Devices – Video Speed Current and Boltage Out

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ANALOG
8-, 10-,12-BitVideoSpeed
W DEVICES Currenat ndVoltageOut,D/ A Converters
FEA TURES
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Current Settling Times to 15ns
:t1.5V Compliance
Voltage Settling Times to 100ns (MDH)
- ^{Monotonicity Guaranteed Over Temperature}
High Output Currents 15mA
-30°C to +85°C Operating Range
Industry Standard Pin Outs
20V, p.p Out (MDH)
OBSOLETE TTl orECl logic
APPLICATIONS
CRT Vector Displays
Digitial Waveform Generation
Automatic Test Equipment
TV Picture Reconstruction
GENERAL DESCRIPTION
This broad family of digital-to-analog converters represents the
"state of the art" in modular, high speed, voltage and current
output devices. The family consists of a total of 11 devices in
4 series (MDS, MDSE, MDSL and MDH) that allow the user to
make engineering trade-offs between resolution, speed, output
and logic type. The first 3 are high compliance current output
unitS which make possible linear output swings greater than
:t1.5V. The voltage output MDH series contain a fast settling
hybrid operational amplifier which provides:t 10V output at
achieve ultra-high speed operation. In fact, it is the fastest 12-
bit D/A available, settling to 0.025% in 40ns. Hybrid construc-
tion eliminates the thermal lag problem inherent in 12-bit
D/A's constructed with discrete componentS. This in turn
means that the accuracy is maintained over the total frequency
range of operation, yielding superior results for frequency do-
main applications.
The MDS-1240 is particularly well suited for CRT display ap-
plications because of its unsurpassed speed and drive capa-
bilities. The high output current (ISmA) allows the use of low
:t5OmA. To simplify selection these major specifications are
summarized in Table 1.
impedance loads so that settling times remain short - even
with higher output voltage levels. The ability to drive load ca-
MODEL
BITS
FULLSCALE
OUTPUT
FULL SCALE
SETTLING TIME
INPUT ^{pacitance is at least 3 times that of other 12-bit D/A's thus}
LOGIC providing capability to drive a terminated transmission line
MDS-0815
8
MDS-I020
to
MDS-1240
12
MDS-O815E 8
(Fastest
15mA
15mA
15mA
Settling High Current Out)
15ns to 0.4% FS
20n5 to 0.1% FS
40n5 to 0.025% FS
(MDS with ECL Logic)
15mA
15ns to 0.4% FS
TTL
TTL
TTL
ECL
directly. The MDS-815 and MDS-I020 provide similar per-
formance at 8 and 10 bits, while the MDS-E units provide it
with ECL logic. MDSL-082S, MDSL-I035 and MDSL-12S0
also utilize this reliable hybrid construction. The use of laser
trimmed resistor networks within the D/A's not only elimi-
MDS-I020E 10
15mA
20n5 to 0.1% FS
ECL nates thermal time lag errors but provide the linearity temp-
MDSL-0825 8
MDSL-I035 10
MDSL-1250 12
MDH-0870
8
MDH-l00l
10
MDH-1202 12
(Low Current MDS)
SmA
25n5toO.l%
SmA
25n5toO.l%
SmA
SOns to 0.025%
(Voltage Out MDSL)
10V /50mA 150n5 to 0.4%
,tOV/50mA 200n5 to 0,1 %
tOV /50mA 500n5 to 0.025%
co of 2ppmtC; guaranteeing monotonic operation over the
TTL _{extended temperature range of -30°C to +8SoC. The power}
TTL
TTL
dissipation of the MDSL series is one-half that of competi-
tive D/A's, but a full SmA output current is maintained. This
TTL _{allows driving transmission lines or other low impedance loads}
TTL _directly.
TTL
Table 1.
(continued on page 1955)
SPEED WITH PRECISION
Analog Devices' model MDS-1240 is the first D/A converter
available with highly reliable, internal hybrid construction to
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