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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)： | 9/12頁 |
| 文件大?。?/td> | 349K |
| 代理商： | AD2S93 |
–9–
REV. A
AD2S93
Two-Wire LVDT Connection
This method should be used in cases where the sum of the
LVDT secondary output voltages (A + B) is not constant with
LVDT displacement over the desired stroke length. This method
of connection, shown in Figure 7, still maintains the ratiometric
operation and the insensitivity to variations in reference ampli-
tude and frequency. However, the phase shift between V
REF
and V1 should be minimized to maintain accuracy (see Section
“PHASE SHIFT AND QUADRATURE EFFECTS”). Sug-
gested phase compensation circuits are shown in Figure 7.
PHASE SHIFT AND QUADRATURE EFFECTS
Reference to signal phase shift can be high in LVDTs, some-
times in the order of 70 degrees. If the converter is connected
as in Figures 5 and 6, any effects due to this phase shift are
minimized. This connection method, therefore, provides out-
standing benefits.
The additional gain error caused by reference to signal phase
shifts is given by:
(1 –
cos
θ
)
×
100
% of FSR
where
θ
=
phase shift between V
REF
and DIFF
.
When the phase shift between V
REF
and V1 is zero, additional
quadrature on the signal will have no effect on the converter.
This is another benefit of the conversion method. For example,
when a REF lags (A–B) by approximately 10
°
, the gain error is
approximately 1%. When (A–B) lags REF by approximately
10
°
, the gain error is approximately 2%.
REMOTE MULTIPLE SENSOR INTERFACING
The DATA output of the AD2S93 is held in a high impedance
state until
CS
is taken LO. This allows a user to operate the
AD2S93 in an application with more than one converter con-
nected on the same line. Figure 8 shows four LVDTs interfaced
to four AD2S93s. Excitation for the LVDT is provided locally
by an oscillator.
SCLK, DATA and two address lines are fed down low loss
cables suitable for communication links. The two address lines
are decoded locally into
CS
for the individual converters. Data
is received and transmitted using transmitters and receivers.
2-4 DECODING
(74HC139)
LVDT
LVDT
LVDT
LVDT
AD2S93
1
AD2S93
2
AD2S93
3
AD2S93
4
OSC
BUFFER
4
4
4
4
2
2
0V
V
SS
A0
A1
CS
4
V
DD
CS
3
CS
2
CS
1
DATA
SCLK
Figure 8. Remote Sensor Interface
NC = NO CONNECT
D
S
U
C
N
N
OVR
NULL
DEMODOUT
DIR
4
2
3
25
24
21
20
19
23
22
1
5
6
9
10
7
8
(Not to Scale)
AD2S93
+5V
0V
–5V
R4
R3
CCT
OSC
PISTON
V
DD
PHASE LAG = ARCTAN 2
π
fRC
TOP VIEW
12k
PHASE
SHIFT
PHASE LEAD = ARCTAN
2
π
fRC
1
C
V
DD
V
SS
DGND
AGND
LOS
GAIN
DIFF
11
NC
26
27
28
A
B
12
15
18
17
16
14
13
REF
C
R
R
C
C3
R5
C4
R6
R2
C2
C1
R7
Figure 7. Two-Wire LVDT Connection
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 |
| AD2S99BP | Programmable Oscillator |
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(shí)鐘/計(jì)時(shí) - 可編程計(jì)時(shí)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(jì)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(shí)鐘/計(jì)時(shí) - 可編程計(jì)時(shí)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(jì)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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