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LTC1968数据手册封面

LTC1968 Datasheet

  • LTC1968

  • Precision Wide Bandwidth, RMS-to-DC Converter

  • 292.33KB

  • 28页

  • Linear

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LTC1968
Precision Wide Bandwidth,
RMS-to-DC Converter
FEATURES
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DESCRIPTIO
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High Linearity:
0.02% Linearity Allows Simple System Calibration
Wide Input Bandwidth:
Bandwidth to 1% Additional Gain Error: 500kHz
Bandwidth to 0.1% Additional Gain Error: 150kHz
3dB Bandwidth Independent of Input Voltage
Amplitude
No-Hassle Simplicity:
True RMS-DC Conversion with Only One External
Capacitor
Delta Sigma Conversion Technology
Ultralow Shutdown Current:
0.1碌A
Flexible Inputs:
Differential or Single Ended
Rail-to-Rail Common Mode Voltage Range
Up to 1V
PEAK
Differential Voltage
Flexible Output:
Rail-to-Rail Output
Separate Output Reference Pin Allows Level Shifting
Small Size:
Space Saving 8-Pin MSOP Package
The LTC
庐
1968 is a true RMS-to-DC converter that uses an
innovative delta-sigma computational technique. The ben-
efits of the LTC1968 proprietary architecture, when com-
pared to conventional log-antilog RMS-to-DC converters,
are higher linearity and accuracy, bandwidth independent
of amplitude and improved temperature behavior.
The LTC1968 operates with single-ended or differential in-
put signals and accurately supports crest factors up to 4.
Common mode input range is rail-to-rail. Differential in-
put range is 1V
PEAK
, and offers unprecedented linearity. The
LTC1968 allows hassle-free system calibration at any in-
put voltage.
The LTC1968 has a rail-to-rail output with a separate out-
put reference pin providing flexible level shifting; it oper-
ates on a single power supply from 4.5V to 5.5V. A low power
shutdown mode reduces supply current to 0.1碌A.
The LTC1968 is packaged in the space-saving MSOP pack-
age, which is ideal for portable applications.
APPLICATIO S
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True RMS Digital Multimeters and Panel Meters
True RMS AC + DC Measurements
TYPICAL APPLICATIO
w
w
4.5V TO 5.5V
V
+
IN1
IN2
EN
.
w
h
C
n
i
d
a
.
z
, LTC and LT are registered trademarks of Linear Technology Corporation.
Protected under U.S. Patent Numbers 6,359,576, 6,362,677 and 6,516,291
Linearity Performance
LINEARITY ERROR (V
OUT
mV DC 鈥?V
IN
mV AC
RMS
)
0.2
LTC1968,
鈭單?/div>
0
鈥?.2
鈥?.4
鈥?.6
鈥?.8
鈥?.0
60Hz SINEWAVE
0
100
200
300
V
IN
(mV AC
RMS
)
400
500
1968 TA01b
Single Supply RMS-to-DC Converter
DIFFERENTIAL
INPUT
0.1碌F
OPT. AC
COUPLING
OUTPUT
LTC1968
OUT RTN
GND
C
AVE
10碌F
+
V
OUT
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1968 TA01
Free Datasheet Download http://www.Chinadz.Com
U
m
o
C
U
U
CONVENTIONAL
LOG/ANTILOG
1968f
http://www.Icver.Com
1

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