參數(shù)資料
型號: LTC1966
廠商: Linear Technology Corporation
英文描述: Precision Micropower, SIGMA RMS-to-DC Converter
中文描述: 精密微,適馬有效值- DC轉換器
文件頁數(shù): 28/32頁
文件大?。?/td> 444K
代理商: LTC1966
28
LTC1966
sn1966 1966fas
7. Output is noisy with >10kHz inputs.
– This is a fundamental characteristic of this topol-
ogy. The LTC1966 is designed to work very well
with inputs of 1kHz or less. It works okay as high as
1MHz, but it is limited by aliased
Σ
noise.
Solution: Bandwidth limit the input or digitally filter
the resulting output.
8. Large errors occur at crest factors approaching, but
less than 4.
– Insufficient averaging.
Solution: Increase C
AVE
. See “Crest Factor and AC +
DC Waveforms” section for discussion of output
droop.
9. Screwy results, errors > spec limits, typically 1% to 5%.
– High impedance (85k
) and high accuracy (0.1%)
require clean boards! Flux residue, finger grime, etc.
all wreak havoc at this level.
Solution: Wash the board.
LTC1966
KEEP BOARD CLEAN
10. Gain is low by
1% or more, no other problems.
– Probably due to circuit loading. With a DMM or a
10
×
scope probe, Z
IN
= 10M
. The LTC1966
output is 85k
, resulting in –0.85% gain error.
Output impedance is higher with the DC accurate
post filter.
Solution: Remove the shunt loading or buffer the
output.
– Loading can also be caused by cheap averaging
capacitors.
Solution: Use a high quality metal film capacitor
for C
AVE
.
200mV
IN
–0.85%
DMM
DCV
LTC1966
10M
5
85k
6
V
OUT
OUT RTN
1966 TS10
LOADING DRAGS DOWN GAIN
mV
APPLICATIOU
W
U
U
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參數(shù)描述
LTC1966CMS8 功能描述:IC PREC RMS/DC CONV MCRPWR 8MSOP RoHS:否 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉換器 系列:- 標準包裝:46 系列:- 電流 - 電源:1.2mA 電源電壓:±18 V,36 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC(0.295",7.50mm 寬) 供應商設備封裝:16-SOIC W 包裝:管件
LTC1966CMS8#PBF 功能描述:IC PREC RMS/DC CONV MCRPWR 8MSOP RoHS:是 類別:集成電路 (IC) >> PMIC - RMS 至 DC 轉換器 系列:- 標準包裝:46 系列:- 電流 - 電源:1.2mA 電源電壓:±18 V,36 V 安裝類型:表面貼裝 封裝/外殼:16-SOIC(0.295",7.50mm 寬) 供應商設備封裝:16-SOIC W 包裝:管件
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LTC1966CMS8PBF 制造商:Linear Technology 功能描述:RMS-to-DC Converter Prec. uPower MSOP8