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参数资料
| 型号： | RD-19240LG200T |
| 厂商： | DATA DEVICE CORP |
| 元件分类： | 位置变换器 |
| 英文描述： | SYNCHRO OR RESOLVER TO DIGITAL CONVERTER, PQCC64 |
| 封装： | PLASTIC, LCC-64 |
| 文件页数： | 18/18页 |
| 文件大小： | 215K |
| 代理商： | RD-19240LG200T |
9
Data Device Corporation
www.ddc-web.com
RD-19240
Pre 1-1-04/05-0
+S
-S
SIN
aR
R
+C
-C
COS
R'
-
+
-
+
R/2
R
aR
bR
2R'
R'
bR
+REF
-REF
R'
R
VB
VA
Notes:
1. R'
≥ 10 k
2. Consideration for the value of R is LVDT loading.
3. RMS values given.
4. Use the absolute values of VA and VB when subtracting per the formula for calculating resistance
values. Use the calculated sign of VA and VB for calculating SIN and COS. Calculations
shown are based on full scale travel being to the VA side of the LVDT.
5. See the RDC-19220 & RD-19230 Applications Manual for calculation examples.
6. Negative voltages are 180 out of phase from the reference.
Fs = 2V
-2V
VB
VA
LVDT
OUTPUT
+FS
-FS
NULL
COS
SIN
RDC-19240
INPUT
-FS
+FS
NULL
1V
2V
1
b =
=
VAnull
VBnull
2
a =
(VA - VB) max
a
SIN = - 1+
(VA - VB)
2
a
COS = - 1-
(VA - VB)
2
FIGURE 9. 3-WIRE LVDT SCALING CIRCUIT
TABLE 5. 12-BIT LVDT OUTPUT CODE
FOR FIGURE 9
LVDT OUTPUT
OVER
RANGE
DATA
MSB
LSB
+ over full travel
+ full travel -1 LSB
+0.5 travel
+1 LSB
null
- 1 LSB
-0.5 travel
- full travel
- over full travel
01
xxxx
00
1111
00
1100
0000
00
1000
0000
0001
00
1000
0000
00
0111
1111
00
0100
0000
00
0000
11
xxxx
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