Electronic Components Datasheet Search
  English  ▼

Delete All
ON OFF
ALLDATASHEET.COM

X  

Preview PDF Download HTML

AD598 Datasheet(PDF) 4 Page - Analog Devices

Part No. AD598
Description  LVDT Signal Conditioner
Download  16 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  AD [Analog Devices]
Homepage  http://www.analog.com
Logo 

AD598 Datasheet(HTML) 4 Page - Analog Devices

 
Zoom Inzoom in Zoom Outzoom out
 4 / 16 page
background image
AD598–Typical Characteristics (at +25 C and V
S =
15 V, unless otherwise noted)
THEORY OF OPERATION
A block diagram of the AD598 along with an LVDT (Linear
Variable Differential Transformer) connected to its input is
shown in Figure 5. The LVDT is an electromechanical trans-
ducer whose input is the mechanical displacement of a core and
whose output is a pair of ac voltages proportional to core posi-
tion. The transducer consists of a primary winding energized by
OSC
AMP
AMP
VOUT
LVDT
EXCITATION (CARRIER)
11
17
10
16
2
3
FILTER
A–B
A+B
VB
VA
AD598
Figure 5. AD598 Functional Block Diagram
an external sine wave reference source, two secondary windings
connected in series, and the moveable core to couple flux be-
tween the primary and secondary windings.
The AD598 energizes the LVDT primary, senses the LVDT
secondary output voltages and produces a dc output voltage
proportional to core position. The AD598 consists of a sine
wave oscillator and power amplifier to drive the primary, a de-
coder which determines the ratio of the difference between the
LVDT secondary voltages divided by their sum, a filter and an
output amplifier.
The oscillator comprises a multivibrator which produces a
triwave output. The triwave drives a sine shaper, which pro-
duces a low distortion sine wave whose frequency is determined
by a single capacitor. Output frequency can range from 20 Hz to
20 kHz and amplitude from 2 V rms to 24 V rms. Total har-
monic distortion is typically –50 dB.
The output from the LVDT secondaries consists of a pair of
sine waves whose amplitude difference, (VA–VB), is proportional
to core position. Previous LVDT conditioners synchronously
detect this amplitude difference and convert its absolute value to
–20
0
20
60
100
140
–60
–200
–240
–160
–120
–80
–40
0
40
TEMPERATURE –
°C
OFFSET PSRR 12–15V
OFFSET PSRR 15–18V
GAIN PSRR 12–15V
GAIN PSRR 15–18V
Figure 1. Gain and Offset PSRR vs. Temperature
–20
0
20
60
100
140
–60
–25
–30
–35
–20
–15
–10
–5
0
5
TEMPERATURE –
°C
OFFSET CMRR
± 3V
GAIN CMRR
± 3V
Figure 3. Gain and Offset CMRR vs. Temperature
–20
0
20
60
100
140
–60
–40
–60
–80
–20
0
20
40
80
120
TEMPERATURE –
°C
Figure 2. Typical Gain Drift vs. Temperature
–20
0
20
60
100
140
–60
–10
–20
0
10
20
TEMPERATURE –
°C
Figure 4. Typical Offset Drift vs. Temperature
REV. A
–4–


Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16 


Datasheet Download



Related Electronics Part Number

Part NumberComponents DescriptionHtml ViewManufacturer
NE5521LVDT signal conditioner 1 2 3 4 5 NXP Semiconductors
AD698Universal LVDT Signal Conditioner 1 2 3 4 5 MoreAnalog Devices
LTM-STR44-Channel Webcasting Video and Audio Signal Conditioner 1 List of Unclassifed Manufacturers
ZMD31015Low-cost sensro signal conditioner with dignostics 1 2 Zentrum Mikroelektronik Dresden AG
ZMD31020Sensor Signal Conditioner 1 2 3 4 5 MoreZentrum Mikroelektronik Dresden AG
ZMD31030Automotive Sensor Signal Conditioner with LIN Interface 1 2 Zentrum Mikroelektronik Dresden AG
1B31Wide Bandwidth Strain Gage Signal Conditioner 1 2 3 4 5 MoreAnalog Devices
ZMD31035Automotive Sensor Signal Conditioner 1 2 Zentrum Mikroelektronik Dresden AG
1B32Bridge Transducer Signal Conditioner 1 2 3 4 5 MoreAnalog Devices
PA1001ASIGNAL CONDITIONER & CONVERTERS 1 2 3 4 5 MoreList of Unclassifed Manufacturers

Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Alldatasheet API   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn