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參數(shù)資料
| 型號： | SDC-361-L-3 |
| 廠商： | DATA DEVICE CORP |
| 元件分類： | 位置變換器 |
| 英文描述： | SYNCHRO OR RESOLVER TO DIGITAL CONVERTER, DIP32 |
| 封裝： | 3.125 X 2.625 INCH, 0.820 INCH HEIGHT, PACKAGE-54/32 |
| 文件頁數(shù)： | 4/6頁 |
| 文件大?。?/td> | 102K |
| 代理商： | SDC-361-L-3 |
4
ACCURACY TESTS
Because of the accuracy of DDC’s S/D converters, only labora-
tory grade synchro or resolver substitution boxes or standards
should be used. If synchro standards are not available, arrange-
ments may be made to witness the final source inspection at the
DDC factory. The figure below shows how to setup equipment to
measure S/D converter accuracy. A separate lamp driver or suit-
able readout is required for each output data line. The synchro
standard is set to any desired test angle, and the lamps which
are lit are added according to their bit weights and compared with
the test angle.
PRINTED CIRCUIT BOARD MOUNTING
When mounting a converter on a printed circuit board, it is very
important to keep logic-level signals as far away from AC and
power signal as possible. Under no circumstances should AC or
power pins be adjacent to data pins at the connector. It is also
prudent to keep the AC and power pins separated from each
other. The intent is to make it impossible to short logic inputs/out-
puts to AC or power pins with scope probes, and to keep digital
noise from coupling into the sensitive AC signals.
It is strongly recommended that circuit layouts be designed so
plated through-holes are not required to mount hybrid or discrete
modules. If all lands connecting to pins are located on the oppo-
site (dip) side of the PC board from the module, there will be no
risk of destroying a connection by ripping out the plated through-
hole connection if the module must be replaced. It will also be
easier to unsolder the module without the module being dam-
aged.
TABLE 4. MIL-STD-202E TEST METHODS
METHOD
204C
213B
106D *
107D
101D
105C
CONDITION
C
A
--
A
B
COMMENT
10G, 2000 Hz vibration
50G, 11 ms shock
Moisture
Thermal shock
Salt spray
50,000 ft, altitude
* when conformally coated on P.C. board
TEST METHODS FOR DISCRETE MODULES
All of DDC’s discrete S/D converter modules are high quality
products whose semiconductor components are hermetically
sealed. Discrete modules will meet specific test methods and
conditions of MIL-STD-202E shown below unless alternate
methods are specified by the customer in his procurement doc-
umentation.
REFERENCE
SYNCHRO/
RESOLVER
STANDARD
(SINGLE SPEED
OR TWO SPEED)
SYNCHRO
OR
RESOLVER
INPUT
S/D OR R/D
CONVERTER
BEING
TESTED
BIT N
BIT I
LAMP DRIVER
RH
RL
FIGURE 5. ACCURACY TEST CIRCUIT
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