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

X  

TC500A データシート(PDF) 10 Page - TelCom Semiconductor, Inc

部品番号 TC500A
部品情報  PRECISION ANALOG FRONT ENDS
Download  17 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
メーカー  TELCOM [TelCom Semiconductor, Inc]
ホームページ  http://www.telcom-semi.com
Logo TELCOM - TelCom Semiconductor, Inc

TC500A データシート(HTML) 10 Page - TelCom Semiconductor, Inc

Back Button TC500A Datasheet HTML 6Page - TelCom Semiconductor, Inc TC500A Datasheet HTML 7Page - TelCom Semiconductor, Inc TC500A Datasheet HTML 8Page - TelCom Semiconductor, Inc TC500A Datasheet HTML 9Page - TelCom Semiconductor, Inc TC500A Datasheet HTML 10Page - TelCom Semiconductor, Inc TC500A Datasheet HTML 11Page - TelCom Semiconductor, Inc TC500A Datasheet HTML 12Page - TelCom Semiconductor, Inc TC500A Datasheet HTML 13Page - TelCom Semiconductor, Inc TC500A Datasheet HTML 14Page - TelCom Semiconductor, Inc Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 17 page
background image
3-28
TELCOM SEMICONDUCTOR, INC.
PRECISION ANALOG FRONT ENDS
TC500
TC500A
TC510
TC514
APPLICATIONS
Component Value Selection
The procedure outlined below allows the user to arrive
at values for the following TC5xx design variables:
(1) Integration Phase Timing
(2) Integrator Timing Components (RINT, CINT)
(3) Auto Zero and Reference Capacitors
(4) Voltage Reference
Select Integration Time
Integration time must be picked as a multiple of the
period of the line frequency. For example, tINT times of
33msec, 66msec and 132msec maximize 60Hz line rejec-
tion.
DINT and IZ Phase Timing
The duration of the DINT phase is a function of the
amount of voltage stored on the integrator during TINT, and
the value of VREF. The DINT phase must be initiated imme-
diately following INT and terminated when an integrator
output zero-crossing is detected. In general, the maximum
number of counts chosen for DINT is twice that of INT (with
VREF chosen at VIN (max)/2).
Calculate Integrating Resistor (RINT)
The desired full-scale input voltage and amplifier output
current capability determine the value of RINT. The buffer
and integrator amplifiers each have a full-scale current of
20
µA.
The value of RINT is therefore directly calculated as
follows:
RINT(in MΩ) =
VIN MAX
20
where: VIN MAX = Maximum input voltage (full count voltage)
RINT =Integrating Resistor (in MΩ)
For loop stability, RINT should be ≥ 50kΩ.
Select Reference (CREF) and Auto Zero (CAZ) Capacitors
CREF and CAZ must be low leakage capacitors (such as
polypropylene). The slower the conversion rate, the larger
the value CREF must be. Recommended capacitors for CREF
and CAZ are shown in Table 1. Larger values for CAZ and
CREF may also be used to limit roll-over errors.
Table 1. CREF and CAZ Selection
Conversions Typical Value of Suggested *
Per Second
CREF, CAZ (
µF) Part Number
>7
0.1
WIMA MK12 .1/63/20
2 to 7
0.22
WIMA MK12 .22/63/20
2 or less
0.47
WIMA MK12 .47/63/20
*WIMA Corp. listing on the last page of this data sheet.
Calculate Integrating Capacitor (CINT)
The integrating capacitor must be selected to maximize
integrator output voltage swing. The integrator output volt-
age swing is defined as the absolute value of VDD (or VSS)
less 0.9V (i.e.,
 VDD– 0.9V or V
SS +0.9V ). Using the 20µA
buffer maximum output current, the value of the integrating
capacitor is calculated using the following equation.
CINT = (in µF) =
where: tINT = Integration Period
VS = Applied Supply Voltage
It is critical that the integrating capacitor has a very low
dielectric absorption. Polypropylene capacitors are an ex-
ample of one such chemistry. Polyester and Polybicarbonate
capacitors may also be used in less critical applications.
Table 2 summarizes recommended capacitors for CINT.
Table 2. Recommend Capacitor for CINT
Value
Suggested Part Number*
0.1
WIMA MK12 .1/63/20
0.22
WIMA MK12 .22/63/20
0.33
WIMA MK12 .33/63/20
0.47
WIMA MK12 .47/63/20
*WIMA Corp. listing on the last page of this data sheet.
Calculate VREF
The reference deintegration voltage is calculated
using:
VREF (in Volts) =
(VS – 0.9) (CINT) (RINT)
2(tINT)
(tINT) (20 x 10 –6)
(VS – 0.9)


同様の部品番号 - TC500A

メーカー部品番号データシート部品情報
logo
Microchip Technology
TC500A MICROCHIP-TC500A Datasheet
565Kb / 28P
   Precision Analog Front Ends
2002
TC500A MICROCHIP-TC500A Datasheet
653Kb / 34P
   Precision Analog Front Ends
2006
TC500A MICROCHIP-TC500A Datasheet
588Kb / 38P
   Precision Analog Front Ends with Dual Slope ADC
2008
TC500ACJE MICROCHIP-TC500ACJE Datasheet
653Kb / 34P
   Precision Analog Front Ends
2006
TC500ACJE MICROCHIP-TC500ACJE Datasheet
588Kb / 38P
   Precision Analog Front Ends with Dual Slope ADC
2008
More results

同様の説明 - TC500A

メーカー部品番号データシート部品情報
logo
Microchip Technology
TC500 MICROCHIP-TC500_06 Datasheet
653Kb / 34P
   Precision Analog Front Ends
2006
TC500 MICROCHIP-TC500 Datasheet
565Kb / 28P
   Precision Analog Front Ends
2002
TC500 MICROCHIP-TC500_08 Datasheet
588Kb / 38P
   Precision Analog Front Ends with Dual Slope ADC
2008
logo
Analog Devices
AD1018 AD-AD1018 Datasheet
72Kb / 2P
   High Precision Analog Front End
AD8450 AD-AD8450_17 Datasheet
1Mb / 42P
   Precision Analog Front End and Controller
AD8452 AD-AD8452 Datasheet
743Kb / 35P
   Precision Integrated Analog Front End, Controller
ADPD105 AD-ADPD105 Datasheet
884Kb / 66P
   Photometric Front Ends
ADPD1080 AD-ADPD1080 Datasheet
1Mb / 74P
   Photometric Front Ends
AD1030 AD-AD1030 Datasheet
78Kb / 2P
   High Precision Analog Front End with TEC/PMIC
Rev. Sp0
logo
STMicroelectronics
TDA7521 STMICROELECTRONICS-TDA7521 Datasheet
95Kb / 11P
   Analog Front End
More results


Html Pages

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


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