Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

AD598 Datenblatt(PDF) 5 Page - Analog Devices

Teilenummer AD598
Bauteilbeschribung  LVDT Signal Conditioner
Download  16 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

AD598 Datenblatt(HTML) 5 Page - Analog Devices

  AD598_15 Datasheet HTML 1Page - Analog Devices AD598_15 Datasheet HTML 2Page - Analog Devices AD598_15 Datasheet HTML 3Page - Analog Devices AD598_15 Datasheet HTML 4Page - Analog Devices AD598_15 Datasheet HTML 5Page - Analog Devices AD598_15 Datasheet HTML 6Page - Analog Devices AD598_15 Datasheet HTML 7Page - Analog Devices AD598_15 Datasheet HTML 8Page - Analog Devices AD598_15 Datasheet HTML 9Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 5 / 16 page
background image
AD598
REV. A
–5–
a voltage proportional to position. This technique uses the pri-
mary excitation voltage as a phase reference to determine the
polarity of the output voltage. There are a number of problems
associated with this technique such as (1) producing a constant
amplitude, constant frequency excitation signal, (2) compensating
for LVDT primary to secondary phase shifts, and (3) compen-
sating for these shifts as a function of temperature and frequency.
The AD598 eliminates all of these problems. The AD598 does
not require a constant amplitude because it works on the ratio of
the difference and sum of the LVDT output signals. A constant
frequency signal is not necessary because the inputs are rectified
and only the sine wave carrier magnitude is processed. There is
no sensitivity to phase shift between the primary excitation and
the LVDT outputs because synchronous detection is not em-
ployed. The ratiometric principle upon which the AD598 oper-
ates requires that the sum of the LVDT secondary voltages
remains constant with LVDT stroke length. Although LVDT
manufacturers generally do not specify the relationship between
VA+VB and stroke length, it is recognized that some LVDTs do
not meet this requirement. In these cases a nonlinearity will
result. However, the majority of available LVDTs do in fact
meet these requirements.
The AD598 utilizes a special decoder circuit. Referring to the
block diagram and Figure 6 below, an implicit analog comput-
ing loop is employed. After rectification, the A and B signals are
multiplied by complementary duty cycle signals, d and (I–d)
respectively. The difference of these processed signals is inte-
grated and sampled by a comparator. It is the output of this
comparator that defines the original duty cycle, d, which is fed
back to the multipliers.
As shown in Figure 6, the input to the integrator is [(A+B)d]B.
Since the integrator input is forced to 0, the duty cycle d =
B/(A+B).
The output comparator which produces d = B/(A+B) also con-
trols an output amplifier driven by a reference current. Duty
cycle signals d and (1–d) perform separate modulations on the
reference current as shown in Figure 6, which are summed. The
summed current, which is the output current, is IREF
× (1–2d).
Since d = B/(A+B), by substitution the output current equals
IREF × (A–B)/(A+B). This output current is then filtered and
converted to a voltage since it is forced to flow through the scal-
ing resistor R2 such that:
V
OUT
= I
REF × ( A – B )/( A + B ) × R 2
CONNECTING THE AD598
The AD598 can easily be connected for dual or single supply
operation as shown in Figures 7 and 12. The following general
design procedures demonstrate how external component values
are selected and can be used for any LVDT which meets AD598
input/output criteria.
Parameters which are set with external passive components in-
clude: excitation frequency and amplitude, AD598 system
bandwidth, and the scale factor (V/inch). Additionally, there are
optional features, offset null adjustment, filtering, and signal in-
tegration which can be used by adding external components.
COMP
COMP
FILT
FILT
COMP
RTO
OFFSET
FILT
INTEG
V TO I
BANDGAP
REFERENCE
INPUT
INPUT
±1
±1
A
d
B
0<d<1
BINARY SIGNAL
d - DUTY CYCLE
(A+B) d–B
q
B
A+B
1–d
I
REF
d
I
REF q
A–B
A+B
VOLTS
OUTPUT
VOUT = RSCALE x I REF x
A–B
A+B
INTEG
V TO I
1–d
d
V TO I
Figure 6. Block Diagram of Decoder


Ähnliche Teilenummer - AD598_15

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Analog Devices
AD598A AD-AD598A Datasheet
553Kb / 16P
   LVDT Signal Conditioner
REV. A
AD598AD AD-AD598AD Datasheet
553Kb / 16P
   LVDT Signal Conditioner
REV. A
AD598J AD-AD598J Datasheet
553Kb / 16P
   LVDT Signal Conditioner
REV. A
AD598JR AD-AD598JR Datasheet
553Kb / 16P
   LVDT Signal Conditioner
REV. A
More results

Ähnliche Beschreibung - AD598_15

HerstellerTeilenummerDatenblattBauteilbeschribung
logo
Analog Devices
AD598 AD-AD598 Datasheet
553Kb / 16P
   LVDT Signal Conditioner
REV. A
logo
NXP Semiconductors
NE5521 PHILIPS-NE5521 Datasheet
69Kb / 5P
   LVDT signal conditioner
August 31, 1994
logo
Analog Devices
AD698 AD-AD698 Datasheet
228Kb / 12P
   Universal LVDT Signal Conditioner
REV. B
AD698 AD-AD698_15 Datasheet
235Kb / 12P
   Universal LVDT Signal Conditioner
REV. B
AD698APZ AD-AD698APZ Datasheet
235Kb / 12P
   Universal LVDT Signal Conditioner
REV. B
logo
Vitesse Semiconductor C...
VSC7104 VITESSE-VSC7104 Datasheet
461Kb / 2P
   Quad Signal Conditioner, Octal Signal Conditioner
logo
TE Connectivity Ltd
LDM-1000 TEC-LDM-1000 Datasheet
140Kb / 3P
   LVDT/RVDT Signal Conditioning Module
logo
Festo Corporation.
544216 FESTO-544216 Datasheet
85Kb / 1P
   Signal conditioner
544218 FESTO-544218 Datasheet
87Kb / 1P
   Signal conditioner
544221 FESTO-544221 Datasheet
88Kb / 1P
   Signal conditioner
More results


Html Pages

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


Datenblatt Download

Go To PDF Page


Link URL




Privatsphäre und Datenschutz
ALLDATASHEETDE.COM
War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Linktausch   |   Hersteller
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
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com