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ECRIM SDC RDC DATASHEETS.pdf


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Note: ①

Digital output for 11th bit
Digital output for 12th bit
Digital output for 13th bit
Digital output for 14th bit
Digital output for 15th bit
Digital output for 16th bit
Control of chip select
Enable
Bysel
Byte select

S4 input/no connection
S4NC
S3
S3 Input
S2
S2 Input
S1
S1 Input
NC
No connection
for HSDC device, S4 is not used.
D11
D12
D13
D14
D15
D16

Table 5

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21
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23
24
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26

GND
-VS
+ VS
D1
D2
D3

Ground
-15V power supply
+15V power supply
Control of data locking
Digital output for 1st bit
Digital output for 2nd bit
Digital output for 3rd bit

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32

D4
D5
D6
D7
D7
NC

Digital output for 4th bit
Digital output 5th bit
Digital output 6th bit
Digital output 7th bit
Digital output 8th bit
No connection

Table of weight values

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Connection of Synchro to Digital Converter or Resolver to Digital Converter
±15V, +5V and GND shall be connected to corresponding pins on the converter, notice that the polarities of
the power supply must be correct, otherwise, the converter may be damaged. It is recommended to connect
0.1μF and 6.8μF bypass capacitance in parallel between each power supply terminal and ground.
Signal and excitation source are allowed to be connected to S1, S2, S3 and S4 and RHi and RLo terminal within
an error of 5%.
The signal input shall match the phase of the excitation source so that they can be correctly connected with
the converter, their phases are as follows:
For the synchro, signal inputs are:

For S1 ~ S3 : ES1 ~ S 3  ER L 0 ~ R Hi sin  sin t

For S3 ~ S 2 : ES 3 ~ S 2  ER L 0 ~ R Hi sin(  120 ) sin t
For S 2 ~ S1 : ES 2 ~ S1  ER L 0 ~ R Hi sin(  240) sin t
For the resolver, signal inputs are:

For S1 ~ S3 : ES1 ~ S 3  ER L 0 ~ R Hi sin  sin t

For S 2 ~ S 4 : ES 2 ~ S 4  ERHi ~ RLo cos  sin t
Note: no input signal of RHi, RLo, S1, S2, S3 and S4 is not allowed to be connected to other pins for fear of
damage of the device.
10 Package specifications of Synchro to Digital Converter or Resolver to Digital Converter

Web :www.ecrimpower.com

E-mail: sales@ecrim.cn Phone: +86 551-63667943

Fax: +86 551-65743191

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