データシートサーチシステム
  Japanese  ▼
ALLDATASHEET.JP

X  

AD637AQ データシート(PDF) 10 Page - Analog Devices

部品番号 AD637AQ
部品情報  High Precision, Wideband RMS-to-DC Converter
Download  20 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  AD [Analog Devices]
ホームページ  http://www.analog.com
Logo AD - Analog Devices

AD637AQ データシート(HTML) 10 Page - Analog Devices

Back Button AD637AQ Datasheet HTML 6Page - Analog Devices AD637AQ Datasheet HTML 7Page - Analog Devices AD637AQ Datasheet HTML 8Page - Analog Devices AD637AQ Datasheet HTML 9Page - Analog Devices AD637AQ Datasheet HTML 10Page - Analog Devices AD637AQ Datasheet HTML 11Page - Analog Devices AD637AQ Datasheet HTML 12Page - Analog Devices AD637AQ Datasheet HTML 13Page - Analog Devices AD637AQ Datasheet HTML 14Page - Analog Devices Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 20 page
background image
AD637
Rev. K | Page 10 of 20
FOR A SINGLE-POLE
FILTER SHORT RX
AND REMOVE C3
1
25kΩ
DEN
INPUT
BUFF IN
BUFF
OUT
–VS
CS
dB OUTPUT
3COMMON
BIAS
2NC
4
OUTPUT
OFFSET
+VS
5
25kΩ
6
7
8
9
10
+VS
11
12
NC
13
14
RMS OUT
VIN
CAV
+
AD637
ABSOLUTE
VALUE
–VS
+VS
CAV
VIN
+
C2
4.7kΩ
C3
24kΩ
+
RX
24kΩ
SQUARER/
DIVIDER
INPUT FREQUENCY (Hz)
100
0.01
1
100k
10
100
1k
10k
10
1.0
0.1
100
0.01
10
1.0
0.1
*%dc ERROR + %RIPPLE (PEAK)
Figure 12. Values for CAV and 1% Settling Time for Stated % of Reading Averaging
Error* Accuracy Includes ±2% Component Tolerance (see * in Figure)
INPUT FREQUENCY (Hz)
100
0.01
1
100k
10
100
1k
10k
10
1
0.1
100
0.01
10
1
0.1
*%dc ERROR + %RIPPLE (PEAK)
ACCURACY ±20% DUE TO
COMPONENT TOLERANCE
Figure 11. 2-Pole Sallen-Key Filter
Figure 12 shows values of CAV and the corresponding averaging
error as a function of sine wave frequency for the standard rms
connection. The 1% settling time is shown on the right side of
Figure 12.
Figure 13 shows the relationship between the averaging error,
signal frequency settling time, and averaging capacitor value.
Figure 13 is drawn for filter capacitor values of 3.3× the
averaging capacitor value. This ratio sets the magnitude of the
ac and dc errors equal at 50 Hz. As an example, by using a 1 μF
averaging capacitor and a 3.3 μF filter capacitor, the ripple for
a 60 Hz input signal is reduced from 5.3% of the reading using
the averaging capacitor alone to 0.15% using the 1-pole filter.
This gives a factor of 30 reduction in ripple, and yet the settling
time only increases by a factor of 3. The values of filter
Capacitor CAV and Filter Capacitor C2 can be calculated for
the desired value of averaging error and settling time by using
Figure 13.
Figure 13. Values of CAV, C2, and 1% Settling Time for Stated % of Reading
Averaging Error* for 1-Pole Post Filter (see * in Figure)
INPUT FREQUENCY (Hz)
100
0.01
11
10
100
1k
10k
10
1
0.1
00k
100
0.01
10
1
0.1
*%dc ERROR + %RIPPLE (PEAK)
ACCURACY ±20% DUE TO
COMPONENT TOLERANCE
The symmetry of the input signal also has an effect on the
magnitude of the averaging error. Table 5 gives the practical
component values for various types of 60 Hz input signals.
These capacitor values can be directly scaled for frequencies
other than 60 Hz—that is, for 30 Hz, these values are doubled,
and for 120 Hz they are halved.
For applications that are extremely sensitive to ripple, the 2-pole
configuration is suggested. This configuration minimizes capacitor
values and the settling time while maximizing performance.
Figure 14. Values of CAV, C2, and C3 and 1% Settling Time for Stated % of
Reading Averaging Error* for 2-Pole Sallen-Key Filter (see * in Figure)
Figure 14 can be used to determine the required value of CAV,
C2, and C3 for the desired level of ripple and settling time.


同様の部品番号 - AD637AQ

メーカー部品番号データシート部品情報
logo
Analog Devices
AD637AQ AD-AD637AQ Datasheet
160Kb / 10P
   High Precision, Wide-Band RMS-to-DC Converter
REV. E
More results

同様の説明 - AD637AQ

メーカー部品番号データシート部品情報
logo
Analog Devices
AD637 AD-AD637_15 Datasheet
808Kb / 21P
   High Precision, Wideband RMS-to-DC Converter
Rev. K
AD637ARZ AD-AD637ARZ Datasheet
613Kb / 20P
   High Precision, Wideband RMS-to-DC Converter
Rev. K
logo
Linear Technology
LTC1966 LINER-LTC1966_11 Datasheet
392Kb / 38P
   Precision Micropower RMS-to-DC Converter
LTC1966 LINER-LTC1966_15 Datasheet
397Kb / 38P
   Precision Micropower RMS-to-DC Converter
logo
Analog Devices
AD637 AD-AD637 Datasheet
160Kb / 10P
   High Precision, Wide-Band RMS-to-DC Converter
REV. E
logo
Linear Technology
LTC1966 LINER-LTC1966 Datasheet
444Kb / 32P
   Precision Micropower, SIGMA RMS-to-DC Converter
LTC1967 LINER-LTC1967 Datasheet
328Kb / 28P
   Precision Extended Bandwidth, RMS-to-DC Converter
LTC1967 LINER-LTC1967_15 Datasheet
333Kb / 28P
   Precision Extended Bandwidth, RMS-to-DC Converter
LTC1968 LINER-LTC1968_15 Datasheet
301Kb / 28P
   Precision Wide Bandwidth, RMS-to-DC Converter
LTC1968 LINER-LTC1968 Datasheet
297Kb / 28P
   Precision Wide Bandwidth, RMS-to-DC Converter
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20


データシート ダウンロード

Go To PDF Page


リンク URL




プライバシーポリシー
ALLDATASHEET.JP
ALLDATASHEETはお客様のビジネスに役立ちますか?  [ DONATE ] 

Alldatasheetは   |   広告   |   お問い合わせ   |   プライバシーポリシー   |   リンク交換   |   メーカーリスト
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com