參數(shù)資料
型號(hào)： LTTJ
廠商： Linear Integrated Systems
英文描述： Precision Extended Bandwidth, RMS-to-DC Converter
中文描述： 精密擴(kuò)展帶寬，有效值- DC轉(zhuǎn)換器
文件頁(yè)數(shù)： 1/28頁(yè)
文件大小： 328K
代理商： LTTJ
1
LTC1967
1967f
Precision Extended
Bandwidth, RMS-to-DC Converter
DESCRIPTIOU
I
High Linearity:
0.02% Linearity Allows Simple System Calibration
I
Wide Input Bandwidth:
Bandwidth to 0.1% Additional Gain Error: 40kHz
Bandwidth Independent of Input Voltage Amplitude
I
No-Hassle Simplicity:
True RMS-DC Conversion with Only One External
Capacitor
Delta Sigma Conversion Technology
I
Low Supply Current:
330
μ
A Typ
I
Ultralow Shutdown Current:
0.1
μ
A
I
Flexible Inputs:
Differential or Single Ended
Rail-to-Rail Common Mode Voltage Range
Up to 1V
PEAK
Differential Voltage
I
Flexible Output:
Rail-to-Rail Output
Separate Output Reference Pin Allows Level Shifting
I
Small Size:
Space Saving 8-Pin MSOP Package
APPLICATIU
I
True RMS Digital Multimeters and Panel Meters
I
True RMS AC + DC Measurements
FEATURES
The LTC
1967 is a true RMS-to-DC converter that uses an
innovative delta-sigma computational technique. The ben-
efits of the LTC1967 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 LTC1967 operates with single-ended or differential in-
put signals (for EMI/RFI rejection) and supports crest fac-
tors up to 4. Common mode input range is rail-to-rail. Dif-
ferential input range is 1V
PEAK
, and offers unprecedented
linearity. The LTC1967 allows hassle-free system calibra-
tion at any input voltage.
The LTC1967 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
μ
A.
The LTC1967 is packaged in the space-saving MSOP pack-
age, which is ideal for portable applications.
Single Supply RMS-to-DC Converter
C
AVE
1
μ
F
V
OUT
+
–
1967 TA01
4.5V TO 5.5V
OUTPUT
DIFFERENTIAL
INPUT
LTC1967
OUT RTN
V
+
0.1
μ
F
OPT. AC
COUPLING
EN
GND
IN1
IN2
TYPICAL APPLICATIO
U
V
IN
(mV AC
RMS
)
0
–1.0
L
O
I
R
)
–0.8
–0.6
–0.4
–0.2
0
0.2
100
200
300
400
1967 TA01b
500
LTC1967,
Σ
60Hz SINEWAVE
CONVENTIONAL
LOG/ANTILOG
Linearity Performance
, 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
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