OSC-15802
SYNCHRO/RESOLVER/INDUCTOSYN
®
REFERENCE OSCILLATOR
DESCRIPTION
The OSC-15802 is a power oscillator
with two outputs that are 90° out of
phase. These outputs provide both
the reference and quadrature signals,
simultaneously, making the OSC-
15802 ideally suited for synchro,
resolver, Linear Variable Differential
Transformer (LVDT), Rotary Variable
Differential Transformer (RVDT) and
Inductosyn applications.
The oscillator’s outputs are pin-pro-
grammable for both frequency and
amplitude. The output frequency can
be programmed from 400 Hz to 10
kHz by simply connecting two exter-
nal capacitors. The Reference output
voltage, 7 Vrms, can be scaled down
by connecting a single resistor.
FEATURES
•
ADI Alternate Source
•
Quadrature Reference Output
Voltages for Inductosyn
Applications
APPLICATIONS
Packaged in an 18-pin hermetic DDIP,
the OSC-15802 operates over a tem-
perature range of -55°C to +125°C.
This, combined with its small size and
programmable output voltage and fre-
quency capabilities, makes it an
excellent choice for synchro, resolver,
LVDT, RVDT and Inductosyn applica-
tions.
•
Programmable Output Frequency
to 10 kHz
•
Small 18-Pin DDIP
•
Scalable Reference Output
•
-55°C to +125°C Operating
Temperature Range
G = +2.8
Cext
C1
+15 VDC
Rext
PA IN
-
PA OUT
GND
-15 VDC
QUAD OSCILLATOR
REF
OUT
5350
Ω
+
C2
Cext
REF OUT +90˚
FIGURE 1. OSC-15802 BLOCK DIAGRAM
©
1981, 1999 Data Device Corporation
®
Inductosyn is a registered trademark of Farrand Controls Corporation.
TABLE 1. OSC-15802 SPECIFICATIONS
Specifications apply over temperature range and power supply range.
PARAMETER
FREQUENCY
OUTPUTS
PA OUT
Voltage
Current
REF
Voltage
Current
REF +90°
Voltage
Current
Protection
UNITS
Hz
VALUE
Programmable from
400 to 10k
PROGRAMMABLE FREQUENCY OUTPUT
The output frequency of the OSC-15802 is programmable to
10 kHz. The frequency is programmed using two external equal
value capacitors (see FIGURE 2). The value of the capacitors
(C
ext
) is calculated as follows:
C
ext
= 10
f
7
V rms 7 ±1% for 2.5 V PA input
mA rms 190mA rms max
V rms 2.5 ±10%
mA rms continuous current 3mA
rms max
V rms 2.5 ±10%
mA rms continuous current 3mA
rms max. Momentary
short circuit and tran-
sient proof
(1 sec. max.)
where: C
ext
is capacitance in picofarads (use NPO ceramic),
f is frequency in Hertz.
To scale down the PA OUT voltage, an external resistor (R
ext
) is
connected between pins 3 and 7. The value of R
ext
is calculated
as follows:
R
ext
= 37.5 - 5.35
V
out
where: R
ext
is in kOhms,
V
out
is the desired voltage in Vrms.
For connection to converters connect as follows:
Ref Lo (RL) connect to pin 16
Ref Hi (RH) connect to pin 13 or 12.
POWER SUPPLIES
Voltage
Current
Max Voltage without damage
TEMPERATURE RANGE
Operating
-10X
-30X
Storage
PHYSICAL CHARACTERISTICS
Size
Vdc
mA
Vdc
±15 ±5%
20 max plus current load
±18
°C
°C
°C
in
(mm)
oz
(gm)
-55 to +125
0 to +70
-65 to +150
1.0 x 0.8 x 0.2
(25.45 x 20.32 x 4.83)
18 pin DDIP
0.4
(11.3)
Weight (Max)
+15 V
18
11
Cext
(RH
2
)
RL
16
11
-15 V
+15 V
18
C2
(RL)
3
16
-15 V
15
15
C2
12
REF OUT -90˚
(RH
2
)
1,3
Cext
Cext
10
C2
12
C2
REF OUT +90˚
OSC-15801
C1
C1
6
6
Cext
13
OSC-15802
PA OUT (REF)
13
(RH
1
)
1,3
PA OUT (REF)
(RH
1
)
1,3
7
REF OUT
2
7
PA
OUT
REF
IN
2
3
Rext
Rext
Notes:
1. Output Low side is pin 16 "gnd"
PA IN
2. Pin 7. REF OUT is the unbuffered output of
3
the oscillator
Notes:
3. RH
1
= Typical connection to
side
converter
"gnd"
1. Output Low
RD
is pin 16
Ref Hi.
2. Pin 7, REF OUT is the unbuffered output of
RH
2
= Low power -90 degree phase shifted
the oscillator
signal for use with inductosyns.
3. RH = Typical connection to RD converter
1
Ref Hi.
RH
2
= Low power +90 degree phase shifted
signal for use with inductosyns.
FIGURE 2. PROGRAMMING RESISTOR AND CAPACITOR CONNECTIONS
Data Device Corporation
www.ddc-web.com
2
OSC-15802
H-11/06-0
INDUCTOSYN
®
TYPICAL CONNECTION
A linear or rotary Inductosyn
®
consists of a slider and a scale. As
the slider moves over the scale there is a low voltage electrical
output proportional to the distance moved. Inductosyns usually
are excited by a 5 kHz to 20 kHz frequency. The OSC-15802 is an
oscillator that was designed with a high frequency output and a
+90° phase shift, which is needed for Inductosyn®-to-digital con-
version (see figure below).
The figure below will convert each pitch to 360° of digital data. A
means to track counts will be needed for multiple pitches. Using
an RD-19230 and A quad B zero index pulse for counting pitches
is one possible solution.
Note that inductosyns typically have a + or - 90 degree phase shift
from input to output. This requires an oscillator with a 90 degree
phase shifted second ouptut to be connected to the RD convert-
er reference so that the RD input and reference will now be in
phase.
DDC has two oscillators to cover the +90 or -90 phase shift need-
ed. See the OSC-15801 for -90 phase shift and the OSC-15802
for +90 phase shift.
Note: See DDC’s Synchro/Resolver Conversion Handbook “Using
an R/D with an inductosyn” for further information.
INDUCTOSYN
SCALE
INDUCTOSYN
SLIDER
DUAL
MATCHED
INDUCTOSYN
PREAMPS
QUADRATURE
POWER
OSCILLATOR
OSC-15802
2 Vrms
RESOLVER
TO
DIGITAL
CONVERTER
DIGITAL
OUTPUT
PA OUT
RH
RL
REF OUT
+90
QUADRATURE
OUTPUT
90
˚
PHASE
SHIFT
CHASSIS GROUND
CIRCUIT GROUND
INDUCTOSYN
®
-TO-DIGITAL CONVERTER SYSTEM
Data Device Corporation
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3
OSC-15801
K-11/06-0
TABLE 2. OSC-15802 PIN FUNCTIONS
PIN
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
NAME
FUNCTION
NC
No connection
NC
No connection
PA IN
Power amplifier input
NC
No connection
NC
No connection
C1
Capacitor connection (pin-programmable freq)
REF OUT
Reference Output
NC
No connection
NC
No connection
NC
No connection
C2
Capacitor connection (pin-programmable freq)
REF OUT +90° +90° reference output signal
PA OUT
Power amplifier output
NC
No connection
-15 V
-15 Vdc power supply voltage
GND
Ground
NC
No connection
+15 V
+15 Vdc power supply voltage
Note : NC pins have no connection in package.
1.002 MAX
(25.45)
18
10
0.800
MAX
(20.32)
0.600
(15.24)
1
0.035 TYP
(0.89)
PIN 1 INDEX
TOP VIEW
9
0.190
MAX (4.83)
0.010 ±0.002
TYP
(0.25 ±0.05)
SIDE VIEW
0.180
(4.57)
0.018 ±0.002
(0.46 ±0.05)
0.100 TYP
(2.54)
0.040 TYP
(1.02)
8 EQ. SP. @ 0.100 = 0.800
TOL NONCUM
(@ 2.54 = 20.32)
NOTES:
1. Dimensions shown are in inches (mm).
2. Lead cluster shall be centralized
within ±0.010 (±2.54) of outline dimensions.
3. Pin material meets solderability
requirements of MIL-STD-202E,
Method 208C.
4. Pin numbers are for reference only.
FIGURE 3. OSC-15802 MECHANICAL OUTLINE
Data Device Corporation
www.ddc-web.com
4
OSC-15802
H-11/06-0
ORDERING INFORMATION
OSC-15802- X X 0 X
Supplemental Process Requirements:
S = Pre-Cap Source Inspection
L = Pull Test
Q = Pull Test and Pre-Cap Inspection
Blank = None of the Above
Process Requirements:
0 = Standard DDC Processing, no Burn-In
1 = MIL-PRF-38534 Compliant
3
2 = B
1
3 = MIL-PRF-38534 Compliant with PIND Testing
3
4 = MIL-PRF-38534 Compliant with Solder Dip
2,3
5 = MIL-PRF-38534 Compliant with PIND Testing and Solder Dip
2,3
6 = B
1
with PIND Testing
7 = B
1
with Solder Dip
2
8 = B
1
with PIND Testing and Solder Dip
2
9 = Standard DDC Processing with Solder Dip, no Burn-In
Temperature Grade/Data Requirements:
1 = -55°C to +125°C
2 = -40°C to +85°C
3 = 0°C to +70°C
4 = -55°C to +125°C with Variables Test Data
5 = -40°C to +85°C with Variables Test Data
8 = 0°C to +70°C with Variables Test Data
Notes:
1. Standard DDC processing with burn-in and full temperature test. See table below.
2. These products contain tin-lead solder finish as applicable to solder dip requirements.
3. MIL-PRF-38534 product grading is designated with the following dash numbers:
Class H is a -11X, 13X, 14X, 15X, 41X, 43X, 44X, 45X
Class G is a -21X, 23X, 24X, 25X, 51X, 53X, 54X, 55X
Class D is a -31X, 33X, 34X, 35X, 81X, 83X, 84X, 85X
STANDARD DDC PROCESSING
FOR HYBRID AND MONOLITHIC HERMETIC PRODUCTS
MIL-STD-883
TEST
INSPECTION
SEAL
TEMPERATURE CYCLE
CONSTANT ACCELERATION
BURN-IN
METHOD(S)
2009, 2010, 2017, and 2032
1014
1010
2001
(Note 1)
1015,
1030
(Note 2)
CONDITION(S)
—
A and C
C
3000g
TABLE 1
Notes:
1. For Process Requirement “B”* (refer to ordering information), devices may be non-compliant with MIL-STD-883, Test
Method 1015, Paragraph 3.2. Contact factory for details.
2. When applicable.
Data Device Corporation
www.ddc-web.com
5
OSC-15802
H-11/06-0
