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The 050758 is a hybrid sine/cosine power oscillator which can
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OSC1758-400B
Hybrid Power Oscillator
ANALOG
DEWCES
Hybrid Power Oscillator
FEATURES
Full Mlllury Temperature Range
Hybrid Cort-tttttion
18-Pin DIL Package
(HORN: Frequency Range
ln-Phue and Quadrature Outputs
APPLICATIONS
Synchto Resolver, and tnduetosrn't Excitation
LVDT Drive
GENERAL DESCRIPTION
The 0801758 is a hybrid sine/cosine power oscillator which can
provide l maximum power output of 1.5 watts, over 0 to
lOkHz.
The device comprises two independent parts-an oscillator and a
power ttmplifier.
The oscillator stage has two signal outputs, one 90' in phase
advance with respect to the other.
The oscillator frequency is programmable in the range of tl to
mm: by two identical external capacitors.
The power amplifier stage is externally short circuit protected
and has a gain of 2.8 21%. The maximum output current this
stage can produce it 215m nus (at 7V ms).
Indium”D is I redacted Mm ofFarrastd Industries, Inc.
REV, A
Information furnished by Analog Devices is believed to be accurate and
reliable. However. no responsibility is assumed by Amtlog Devices for its
uu, 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 oatam rights of Analog Devices
FUNCTIONAL BLOCK DIAGRAM
-tse " , “V
Connecting either of. the oscillator stage outputs lo the power
amplifier input, using an external link, win give a nominal
output of 7 volts rms. Lower voltages can beobrained by connecting
an external resistor in series with the amplifier'' inputs.
The OSCl758 is housed in an hermetically-sealed 18-pin D11.
metal case, and operates over full military temperttture range
(-55°C to + 125''C), " well as the industrial (0 to +7ty'C)
temperature range.
MODELS AVAILABLE
The OSCI758 is available in both industrial and military tem-
perature ranges. For details of how to specify the required part,
sec "Ordering Infurmation".
One Technology Way, E0. Box 9106. Norwood. MA 02062-9106. USA.
Tel: 817329-4700 Fex: 61713258703 wa: 710/394-6517
Yum: 814491 Cable: ANALOG NORWOODMASS
0801 758 - SPECIFICATIONS (typical (ii) +25°C with t1lill power supplies unless otherwise noted.)
Model OSC1758/500 0501581400
FREQUENCY RANGE 0~10kHz *
FREQUENCY STABILITY' ,2 t 5% .
REFERENCE 1 OUTPUT" 2.5V ms 15% Ci hah nus *
REFERENCE 2 OUTPUT" LW ms , 5% Cy) 3mA nus
90" Phase Advanced with Respect to
Ref. 1 Output .
AMPLIFIEROUTPUT’ 7Vrms@2|5mA mu *
CAPACITIVE LOAD lOnF (mix) '
AMPLIFIER GAIN‘ 2.8 2 t% *
AMPLIFIER INPUT RESISTANCE 5.35m , 1% .
POWER DISSIPATION 4.0 Watts (max) .
POWER SUPPLY' 2 IW *
6thnA (mu) No Load .
160mA (max) Full Lust
TEMPERATURE RANGE
Operating 0 to + hrc - MT to + 125°C
Stance -6YC to + 150°C *
SIZE 0.975" x 0.775" x 0.175" .
(24.8mm x 19.7mm x 4.5mm)
WEIGHT 0.25 023. *
tOver full owning lunpu'uur: nnge.
Gee section on "stutility".
'Demat to w ms @ 215m Hum; sit volt power supply.
Mill went: with ti2 volt power supply whh dented output voltage.
'Speirmtioas mu " 05075815“)
$pedfksioru mbiect to clung: without tttttice.
ABSOLUTE MAXIMUM VALUES WITH RESPECT TO
SUPPLY GROUND
+ Vs ...................... --th311 to MW
-Vs ...................... +0.3V to -1w
REV. A
0581 758
CONNECTING THE OSC1758
Figure I shows two alternative output range connections.
Figure la shows the output configuration if only the oscillator
sage is required, whereas Figure lb shows the connections
required for a power output.
WTM Cd
" " I 4
- “V W ' tr,
Figure la,
Figure ltr,
The frequency of oscillation tor the OSCI758 in Figure la and
Figure lb is determined by the two identical capacitors Cl and
C2. For the frequency required, the value of CI and C2 should
be calculated using the following equation.
_,..,.,.,
Fosc X 105
Where Fosc 2 Frequency of oscillation in Hz.
th " c, = Funds
For a reduced output from the configuration in Figure lb 3
series resistor, Rs, must be added.
For the required output voltage Rs should be calculated as
follows:
37.5 x 103
= - 5350 Ohms
Vow (rms)
REV. A
STABILITY
To ensure stability of both frequency and voltage level outputs
it is essential that good quality external capacitors are used,
e.g., Silver Mica or Polystyrene.
The tolerance quoted in the, specification applies if high grade
Silver Mica capacitors, with a temperature coefficient of less
than SOpmeC, and a low loss factor, are used.
POWER DISSIPATION
The thermal dissipation characteristics for the OSCl7SS are "
follows:
tt junction - case - 15"CJW
0 junction - ambient = 40°C/W
0 i (max) = 150"C.
Figure 2 shows a graph of power dissipation against temperature
for the 0301758.
Total Power Dissipation =
(Vsmu X Ismv)- Wow “001 X cosine b)
where ' 2 load phase angle
VERSUS CASE IEMMW
MY" HQAY SINK.
. i 's,
I , __ vnsus mam"
g ‘No Nu, m) l,
' " w " IN 1”
TIWTURE - q
Figure 2. Power Dissipation vs. Temperature
NOTE: Although the power amplifier stage has internal short
circuit protection, a heat sink should be employed for protection
tagainst continuous short circuit conditions.
MEAN TIME BETWEEN FAILURES (MTBF)
The use of hybrid manufacturing techniques and computer
aided design for the OSC1758, ensures high reliability. MTBF
figures for this hybrid have been calculated using the "Part
Stress Analysis Prediction" method according to MIL-HDBK,
An example of the figures calculated is given below:
MTBP for OSCI‘ISS under NS environment conditions at a case
temperature of SS'C - 609 thousand hours or 69 years.
Please consult the factory if further MTBF calculations arc
required.
ORDERING INFORMATION
OSCl758 X 00 B
L High Reliability Processing
--.- X = 5 0to + 70°C
Operating Temperature Range
---x = 4 - $5''Cto +125‘C
Operating Temperature Range
OUTLINE DIMENSIONS
Dimensiuns shown in inches and (mm)
(361%
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M ww .-LL-r.
" (20.32)“
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REV. A
C824a—5—3i90
PRINTED IN U.S.A.
