Philips Semiconductors Linear Products
Product specification
NE/SA/SE5521
LVDT signal conditioner
901
August 31, 1994
853-0043 13721
DESCRIPTION
The NE/SA/SE5521 is a signal conditioning circuit for use with
Linear Variable Differential Transformers (LVDTs) and Rotary
Variable Differential Transformers (RVDTs). The chip includes a low
distortion, amplitude-stable sine wave oscillator with programmable
frequency to drive the primary of the LVDT/RVDT, a synchronous
demodulator to convert the LVDT/RVDT output amplitude and phase
to position information, and an output amplifier to provide
amplification and filtering of the demodulated signal.
FEATURES
Low distortion
Single supply 5V to 20V, or dual supply
±
2.5V to
±
10V
Oscillator frequency 1kHz to 20kHz
Capable of ratiometric operation
Low power consumption (182mV typ)
APPLICATIONS
LVDT signal conditioning
RVDT signal conditioning
LPDT signal conditioning
Bridge circuits
PIN CONFIGURATIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
1
2
3
4
5
6
7
8
11
12
13
14
15
16
18
17
9
10
AMP OUT
+IN
–IN
LVDT IN
DEMOD OUT
SYNC
GND
N.C.
N.C.
V+
C
T
V
REF
FEEDBACK
OSC
OSC
V
REF/2
R
T
N.C.
AMP OUT
+IN
–IN
LVDT IN
DEMOD OUT
SYNC
GND
N.C.
V+
C
T
V
REF
FEEDBACK
OSC
OSC
V
REF/2
R
T
F, N Packages
TOP VIEW
D
1
Package
TOP VIEW
NOTE:
1. SOL — released in large SO package only.
ORDERING INFORMATION
DESCRIPTION
TEMPERATURE RANGE
0 to +70
°
C
0 to +70
°
C
–40 to +85
°
C
–55 to +125
°
C
–40 to +85
°
C
ORDER CODE
NE5521N
NE5521D
SA5521N
SE5521F
SA5521D
DWG #
0407A
0171B
0407A
0583A
0582B
18-Pin Plastic Dual In-Line Package (DIP)
16-Pin Small Outline Large (SOL) Package
18-Pin Plastic Dual In-Line Package (DIP)
18-Pin Ceramic Dual In-Line Package (CERDIP)
16-Pin Ceramic Dual In-Line Package (CERDIP)
ABSOLUTE MAXIMUM RATINGS
SYMBOL
V
CC
PARAMETER
RATING
+20
±
10
UNIT
V
V
Supply voltage
Split supply voltage
Operating temperature range
NE5521
SA5521
SE5521
Storage temperature range
Power dissipation
1
T
A
0 to 70
–40 to +85
–55 to +125
–65 to +125
910
°
C
°
C
°
C
°
C
mW
T
STG
P
D
NOTES:
1. For derating, see typical power dissipation versus load curves (Figure 1).