SWR200_10 Datasheet, PDF (1/5 Pages) Cirrus Logic – Precision Sine Wave Reference

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SWSRW2R02000
Precision Sine Wave Reference
FEATURES
♦ Very High Accuracy: +7.071 Vrms ±0.5%
♦ Extremely Low Drift: 20 ppm/°C
(-55°C to +125°C)
♦ Excellent Stability: 10 ppm/1000 Hrs. Typical
♦ Low Distortion: 0.1% Thd @ f = 3300 Hz
♦ Hermetic 14-pin Ceramic DIP
♦ Military Processing Option
APPLICATIONS
♦ Transducer Excitation
♦ High Resolution Servo Systems
♦ High Precision Test and Measurement Instru-
ments
♦ AC Voltage Standard
♦ L_VDT Or R_VDT Reference
♦ Multiplying D/A Reference
DESCRIPTION
SWR200 is a Precision Sine Wave Reference provid-
ing an ultra stable sine wave output of +7.071 V at
±0.5% initial accuracy and temperature coefficient as
low as 20 ppm/°C over the full military temperature
range. The extreme accuracy is made possible by a
chopper-based AGC circuit. The temperature charac-
teristic of the chopper circuit compensates the typical
nonlinearity of the internal DC zener reference, result-
ing in a nearly linear amplitude-temperature character-
istic. Frequency of the SWR200 is programmable with
two external capacitors.
The SWR200 is available in a 14-pin bottom braze
package. They are hermetically sealed and “M” ver-
sions are screened for high reliability and quality.
SWR200 is well suited for any application requiring a
stable sine wave source. The SWR200 can be used as
a reference source in precision sensing systems based
on L_VDT or R_VDT position sensors. A programmable AC
reference can be constructed using the SWR200 as
a reference for a high accuracy multiplying Digital to
Analog Converter.
Figure 1. BLOCK DIAGRAM
+15V
-15V
+15V
-15V
+15V
3
12
+15V
-15V
SWR200DS
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Copyright © Cirrus Logic, Inc. 2010
(All Rights Reserved)
MAY 2010₁
APEX − SWR200DSREVH