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-scal-
able for both frequency and ampli-
tude. The output frequency can be
programmed from 400 Hz to 10 kHz
by simply connecting two external
capacitors. The Reference output volt-
age, 7 Vrms, can be scaled down by
connecting a single resistor.
FEATURES
•
•
ADI Alternate Source
Quadrature Reference Output
Voltages for Inductosyn
Applications
Scalable Output Frequency to 10
kHz
Small 18-Pin DDIP
Scalable Reference Output
-55°C to +125°C Operating
Temperature Range
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
scalable output voltage and frequen-
cy capabilities, makes it an excellent
choice for synchro, resolver, LVDT,
RVDT and Inductosyn applications.
•
•
•
•
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
Scalable from
400 to 10k
SCALABLE FREQUENCY OUTPUT
The output frequency of the OSC-15802 is scalable 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.
POWER SUPPLIES
Voltage
Current
Max Voltage without damage
TEMPERATURE RANGE
Operating
-10X
-30X
Storage
JC (Junction to Case)
PHYSICAL CHARACTERISTICS
Size
Vdc
mA
Vdc
±15 ±5%
20 max plus current load
±18
°C
°C
°C
°C/W
in
(mm)
oz
(gm)
-55 to +125
0 to +70
-65 to +150
8
1.0 x 0.8 x 0.2
(25.45 x 20.32 x 4.83)
18 pin DDIP
0.4
(11.3)
For connection to converters connect as follows:
Ref Lo (RL) connect to pin 16
Ref Hi (RH) connect to pin 13 or 12.
Weight (Max)
+15 V
18
(RL)
3
16
16
-15 V
15
15
11
Cext
11
C2
C2
18
(RH
2
)
(RH
2
)
REF OUT +90˚
Cext
REF OUT +90˚
12
C2
Cext
Cext
12
C1
6
C2
C1
6
OSC-15802
OSC-15802
13
13
PA OUT (REF)
PA OUT (REF)
(RH
1
)
1,3
(RH
1
)
1,3
7
7
REF OUT
2
REF OUT
2
PA IN
3
PA IN
3
Rext
Rext
Notes:
1. Output Low side is pin 16 "gnd"
Notes:
2. Pin 7,
Low side
is the unbuffered output of
1. Output
REF OUT
is pin 16 "gnd"
the oscillator
2. Pin 7, REF OUT is the unbuffered output of
3.
the
1
= Typical connection to RD converter
RH
oscillator
Ref Hi.
3. RH
1
= Typical connection to RD converter
RH =
Ref
2
Hi.
Low power +90 degree phase shifted
signal for use with inductosyns.
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
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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 converter
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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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-scalable freq)
REF OUT
Reference Output
NC
No connection
NC
No connection
NC
No connection
C2
Capacitor connection (pin-scalable 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 MIN
(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
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ORDERING INFORMATION
OSC-15802- X X X X
Supplemental Process Requirements:
S = Pre-Cap Source Inspection
L = Pull Test
Q = Pull Test and Pre-Cap Inspection
K = One Lot Date Code
W = One Lot Date Code and Pre-Cap Source
Y = One Lot Date Code and 100% Pull Test
Z = One Lot Date Code, Pre-Cap Source, and 100% Pull Test
Blank = None of the Above
Additional Process Requirements:
0 = None
1 = X-ray
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.
Lead finish = The standard part, not solder dipped, lead finish is 50 micro inches of Gold
(minimum) over 50-350 micro inches of Nickel. The solder dip option lead finish is,
Tin (63%)/Lead (37%)
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
INSPECTION
SEAL
TEMPERATURE CYCLE
CONSTANT ACCELERATION
BURN-IN
TEST
2009, 2010, 2017, and 2032
1014
1010
2001
(Note 1)
1015,
1030
(Note 2)
METHOD(S)
MIL-STD-883
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
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