Philips Semiconductors Linear Products
Product specification
LVDT signal conditioner
NE/SA/SE5521
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.
PIN CONFIGURATIONS
F, N Packages
AMP OUT 1
+IN 2
鈥揑N 3
LVDT IN 4
DEMOD OUT 5
SYNC 6
18 V+
17 C
T
16 V
REF
15 FEEDBACK
14 OSC
13 OSC
12 V
REF/2
11 R
T
10 N.C.
TOP VIEW
FEATURES
GND 7
N.C. 8
N.C. 9
鈥?/div>
Low distortion
鈥?/div>
Single supply 5V to 20V, or dual supply
鹵2.5V
to
鹵10V
鈥?/div>
Oscillator frequency 1kHz to 20kHz
鈥?/div>
Capable of ratiometric operation
鈥?/div>
Low power consumption (182mV typ)
APPLICATIONS
D
1
Package
AMP OUT 1
+IN 2
鈥揑N 3
LVDT IN 4
DEMOD OUT 5
SYNC 6
GND 7
N.C. 8
TOP VIEW
NOTE:
1. SOL 鈥?released in large SO package only.
16 V+
15 C
T
14 V
REF
13 FEEDBACK
12 OSC
11 OSC
10 V
REF/2
9 R
T
鈥?/div>
LVDT signal conditioning
鈥?/div>
RVDT signal conditioning
鈥?/div>
LPDT signal conditioning
鈥?/div>
Bridge circuits
ORDERING INFORMATION
DESCRIPTION
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)
TEMPERATURE RANGE
0 to +70擄C
0 to +70擄C
鈥?0 to +85擄C
鈥?5 to +125擄C
鈥?0 to +85擄C
ORDER CODE
NE5521N
NE5521D
SA5521N
SE5521F
SA5521D
DWG #
0407A
0171B
0407A
0583A
0582B
ABSOLUTE MAXIMUM RATINGS
SYMBOL
V
CC
Supply voltage
Split supply voltage
Operating temperature range
NE5521
SA5521
SE5521
Storage temperature range
Power dissipation
1
PARAMETER
RATING
+20
鹵10
0 to 70
鈥?0 to +85
鈥?5 to +125
鈥?5 to +125
910
UNIT
V
V
擄C
擄C
擄C
擄C
mW
T
A
T
STG
P
D
NOTES:
1. For derating, see typical power dissipation versus load curves (Figure 1).
August 31, 1994
901
853-0043 13721
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