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參數(shù)資料
| 型號： | CS4192XDWFR16G |
| 廠商： | ON Semiconductor |
| 文件頁數(shù)： | 5/8頁 |
| 文件大小： | 0K |
| 描述： | IC DRIVER AIR CORE SINGLE 16SOIC |
| 產(chǎn)品變化通告： | Product Discontinuation 09/Jan/2008 |
| 標(biāo)準(zhǔn)包裝： | 1,000 |
| 類型： | 驅(qū)動器 |
| 驅(qū)動器/接收器數(shù)： | 1/0 |
| 電源電壓： | 4.5 V ~ 5.5 V |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-SOIC（0.295"，7.50mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 16-SOIC W |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | CS4192XDWFR16GOS |
CS4192
http://onsemi.com
5
APPLICATIONS INFORMATION
THEORY OF OPERATION
The SACD is for interfacing between a microcontroller or
microprocessor and aircore meter movements commonly
used in automotive vehicles for speedometers and
tachometers. These movements are built using two coils
placed at a 90
° orientation to each other. A magnetized disc
floats in the middle of the coils and responds to the magnetic
field generated by each coil. The disc has a shaft attached to
it that protrudes out of the assembly. A pointer indicator is
attached to this shaft and in conjunction with a separate
printed scale displays the vehicle’s speed or the engine’s
speed.
The disc (and pointer) respond to the vector sum of the
voltages applied to the coils. Ideally, this relationship
follows a sine/cosine equation. Since this is a transcendental
and nonlinear function, devices of this type use an
approximation for this relationship. The SACD uses a
tangential algorithm as shown in Figure 2. Only one output
varies in any 45 degree range.
SIN+
Output
Max(128)
SIN
Output
COS+
Output
COS
Output
Max(128)
Min(0)
0
°
45
°
90
°
135
°
180
°
225
°
270
°
315
° 360°
000
001
010
011
100
101
110
111
000
MUX bits (D9D7)
Degrees of Rotation
Figure 2. SIN, COS Outputs
Quadrant I
q + Tan1
VSIN
) * VSIN*
VCOS
) * VCOS*
For
q + 0.176°to 44.824° :
VSIN + Tanq
0.748
VBB
VCOS + 0.748
VBB
For
q + 45.176°to 89.824° :
VSIN + 0.748
VBB
VCOS + Tan(90° * q)
0.748
VBB
Quadrant II
q + 180°Tan1
VSIN
) * VSIN*
VCOS
) * VCOS*
For
q + 90.176°to 134.824° :
VSIN + 0.748
VBB
VCOS +*Tan (q * 90°)
0.748
VBB
For
q + 135.176°to 179.824° :
VSIN + Tan(180° * q)
0.748
VBB
VCOS +*0.748
VBB
Quadrant III
q + 180° ) Tan1
VSIN
) * VSIN*
VCOS
) * VCOS*
For
q + 180.176°to 224.824° :
VSIN +*Tan (q * 180°)
0.748
VBB
VCOS +*0.748
VBB
For
q + 225.176°to 269.824° :
VSIN +*0.748
VBB
VCOS +*Tan (270° * q)
0.748
VBB
Quadrant IV
q + 360° * Tan1
VSIN
) * VSIN*
VCOS
) * VCOS*
For
q + 270.176°to 314.824° :
VSIN +*0.748
VBB
VCOS + Tan(q * 270°)
0.748
VBB
For
q + 315.176° * 359.824° :
VSIN +*Tan (360° * q)
0.748
VBB
VCOS + 0.748
VBB
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