參數(shù)資料
型號： AD2S93
廠商： Analog Devices, Inc.
英文描述： Low Cost LVDT-to-Digital Converter
中文描述： 低成本LVDT的，數(shù)字轉(zhuǎn)換器
文件頁數(shù)： 10/12頁
文件大小： 349K
代理商： AD2S93
–10–
REV. A
AD2S93
The AD2S93’s design has been optimized with a critically
damped response. The closed-loop transfer function is given
by:
θ
OUT
θ
IN
=
1
+
st
1
s
2
K
1
K
2
1
+
st
1
+
+
s
3
t
2
K
1
K
2
θ
OUT
θ
IN
=
K
1
K
2
s
2
(1
+
st
1
)
1
+
st
2
The normalized gain and phase diagrams are given in Figures 10
and 11 with a bandwidth of 1.25 kHz.
5
–45
10k
–30
–40
10
–35
1
–15
–25
–20
–10
–5
0
1k
100
FREQUENCY – Hz
Figure 10. AD2S93 Gain Plot
–180
–140
–160
–120
–100
–60
–40
FREQUENCY – Hz
0
10k
10
1
–80
–20
1k
100
Figure 11. AD2S93 Phase Plot
CIRCUIT DYNAMICS/ERROR SOURCES
TRANSFER FUNCTION
The AD2S93 operates as a Type 2 tracking servo loop. An inte-
grator and VCO/counter perform the two integrations inherent
in a Type 2 loop.
The overall system response of the AD2S93 is that of a unity
gain second order low-pass filter, with the position of the LVDT
as the input and the digital position data as the output. Figure 9
illustrates the AD2S93 system diagram.
G1 (s)
G2 (s)
VEL OUT
OUT
IN
+
Figure 9. AD2S93 Transfer Function
Note: The AD2S93 has been configured with the following dy-
namics.
Reference Frequency
3 dB Bandwidth
VCO Gain is set in MODE 1 where VCOGAIN is connected to
VEL.
Using the procedure described in “SETTING THE CON-
VERTER BANDWIDTH,” the following preferred values (E12
series) were calculated:
C
1 = 820 pF
C
2 = 6.8 nF
R2
= 56 k
C3 = C4 = 470 pF, R7 = 15 k
, R5 = R6 = 33 k
, C4 =
470 pF
The open-loop transfer function is given by:
10 kHz
1250 Hz
G
1(
s
)
=
K
1
s
1
+
st
1
1
+
st
2
G
2(
s
)
=
K
2
s
where:
t
1
=
R
2
C
2
and:
t
2
=
R
2
C
1
×
C
2
C
1
+
C
2
K
1
=
4
×
10
3
25
×
10
3
=
160
×
10
9
×
4
R
V
×
C
V
1
C
1
+
C
2
=
21
K
2
=
Note A
2
has two values depending on which mode is being used
K
2
(MODE1)
= 640
×
10
3
K
2
(MODE2)
= 160
×
10
3
The AD2S93 acceleration constant is given by:
K
a
=
K
1
×
K
2
Therefore in the example given,
K
a
=
K
1
×
K
2
= 21
×
640
×
10
3
= 13.44
×
10
6
s
–2
相關(guān)PDF資料
PDF描述
AD2S93AP Aluminum Electrolytic Capacitor; Capacitor Type:Industrial Grade; Voltage Rating:350VDC; Capacitor Dielectric Material:Aluminum Electrolytic; Operating Temperature Range:-40 C to +85 C; Capacitance:160uF RoHS Compliant: Yes
AD2S93BP Aluminum Electrolytic Capacitor; Capacitor Type:Industrial Grade; Voltage Rating:150VDC; Capacitor Dielectric Material:Aluminum Electrolytic; Operating Temperature Range:-40 C to +85 C; Capacitance:16uF RoHS Compliant: Yes
AD2S99 Aluminum Electrolytic Capacitor; Capacitor Type:Industrial Grade; Voltage Rating:250VDC; Capacitor Dielectric Material:Aluminum Electrolytic; Operating Temperature Range:-40 C to +85 C; Capacitance:16uF RoHS Compliant: Yes
AD2S99AP Programmable Oscillator
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AD2S93AP 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Cost LVDT-to-Digital Converter
AD2S93BP 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Cost LVDT-to-Digital Converter
AD2S99 制造商:AD 制造商全稱:Analog Devices 功能描述:Programmable Oscillator
AD2S99AP 功能描述:IC OSC SINUSOIDAL 20KHZ 20-PLCC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 可編程計時器和振蕩器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:45 系列:- 類型:溫度 - 補(bǔ)償晶體振蕩器（TCXO） 計數(shù):- 頻率:25MHz 電源電壓:3.135 V ~ 3.465 V 電流 - 電源:1.5mA 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 包裝:管件 供應(yīng)商設(shè)備封裝:16-SOIC W 安裝類型:表面貼裝
AD2S99APZ 功能描述:IC OSC SINUSOIDAL 20KHZ 20-PLCC RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 可編程計時器和振蕩器 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)包裝:45 系列:- 類型:溫度 - 補(bǔ)償晶體振蕩器（TCXO） 計數(shù):- 頻率:25MHz 電源電壓:3.135 V ~ 3.465 V 電流 - 電源:1.5mA 工作溫度:-40°C ~ 85°C 封裝/外殼:16-SOIC（0.295"，7.50mm 寬） 包裝:管件 供應(yīng)商設(shè)備封裝:16-SOIC W 安裝類型:表面貼裝
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