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

APPLICATIONS

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+

CT

VREF

FEEDBACK

OSC

OSC

VREF/2

RT

N.C.

AMP OUT

+IN

–IN

LVDT IN

DEMOD OUT

SYNC

GND

N.C.

V+

CT

VREF

FEEDBACK

OSC

OSC

VREF/2

RT

F, N Packages

TOP VIEW

TOP VIEW

NOTE:

1. SOL — released in large SO package only.

ORDERING INFORMATION

DESCRIPTION

TEMPERATURE RANGE

ORDER CODE

DWG #

18-Pin Plastic Dual In-Line Package (DIP)

0 to +70

°C

NE5521N

0407A

16-Pin Small Outline Large (SOL) Package

0 to +70

°C

NE5521D

0171B

18-Pin Plastic Dual In-Line Package (DIP)

–40 to +85

°C

SA5521N

0407A

18-Pin Ceramic Dual In-Line Package (CERDIP)

–55 to +125

°C

SE5521F

0583A

16-Pin Ceramic Dual In-Line Package (CERDIP)

–40 to +85

°C

SA5521D

0582B

ABSOLUTE MAXIMUM RATINGS

SYMBOL

PARAMETER

RATING

UNIT

Supply voltage

+20

V

Split supply voltage

±10

V

Operating temperature range

NE5521

SA5521

SE5521

0 to 70

–40 to +85

–55 to +125

°C

°C

°C

Storage temperature range

–65 to +125

°C

910

mW

NOTES:

1. For derating, see typical power dissipation versus load curves (Figure 1).