поискавой системы для электроныых деталей
  Russian  ▼
ALLDATASHEETRU.COM

X  

TC7126A датащи(PDF) 10 Page - Microchip Technology

номер детали TC7126A
подробное описание детали  3-1/2 Digit Analog-to-Digital Converters
Download  26 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
производитель  MICROCHIP [Microchip Technology]
домашняя страница  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC7126A датащи(HTML) 10 Page - Microchip Technology

Back Button TC7126A Datasheet HTML 6Page - Microchip Technology TC7126A Datasheet HTML 7Page - Microchip Technology TC7126A Datasheet HTML 8Page - Microchip Technology TC7126A Datasheet HTML 9Page - Microchip Technology TC7126A Datasheet HTML 10Page - Microchip Technology TC7126A Datasheet HTML 11Page - Microchip Technology TC7126A Datasheet HTML 12Page - Microchip Technology TC7126A Datasheet HTML 13Page - Microchip Technology TC7126A Datasheet HTML 14Page - Microchip Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 10 / 26 page
background image
TC7126/A
DS21458C-page 10
© 2006 Microchip Technology Inc.
4.0
ANALOG SECTION
In addition to the basic integrate and de-integrate dual
slope cycles discussed above, the TC7126A design
incorporates an auto-zero cycle. This cycle removes
buffer amplifier, integrator and comparator offset volt-
age error terms from the conversion. A true digital zero
reading results without external adjusting potentiome-
ters. A complete conversion consists of three phases:
1.
Auto-Zero phase
2.
Signal Integrate phase
3.
Reference Integrate phase
4.1
Auto-Zero Phase
During the auto-zero phase, the differential input signal
is disconnected from the circuit by opening internal
analog gates. The internal nodes are shorted to analog
common (ground) to establish a zero input condition.
Additional analog gates close a feedback loop around
the integrator and comparator. This loop permits com-
parator offset voltage error compensation. The voltage
level established on CAZ compensates for device offset
voltages. The auto-zero phase residual is typically
10
μV to 15μV. The auto-zero cycle length is 1000 to
3000 clock periods.
4.2
Signal Integrate Phase
The auto-zero loop is entered and the internal differen-
tial inputs connect to VIN+ and VIN-. The differential
input signal is integrated for a fixed time period. The
TC7126/A signal integration period is 1000 clock
periods or counts. The externally set clock frequency is
divided by four before clocking the internal counters.
The integration time period is:
EQUATION 4-1:
The differential input voltage must be within the device
Common mode range when the converter and mea-
sured system share the same power supply common
(ground). If the converter and measured system do not
share the same power supply common, VIN- should be
tied to analog common.
Polarity is determined at the end of signal integrate
phase. The sign bit is a true polarity indication, in that
signals less than 1LSB are correctly determined. This
allows precision null detection limited only by device
noise and auto-zero residual offsets.
4.3
Reference Integrate Phase
The third phase is reference integrate or de-integrate.
VIN- is internally connected to analog common and
VIN+ is connected across the previously charged refer-
ence capacitor. Circuitry within the chip ensures that
the capacitor will be connected with the correct polarity
to cause the integrator output to return to zero. The
time required for the output to return to zero is propor-
tional to the input signal and is between 0 and 2000
counts. The digital reading displayed is:
EQUATION 4-2:
TSI =
4
FOSC
x 1000
Where: FOSC = external clock frequency.
VIN
VREF
1000


Аналогичный номер детали - TC7126A

производительномер деталидатащиподробное описание детали
logo
TelCom Semiconductor, I...
TC7126A TELCOM-TC7126A Datasheet
198Kb / 13P
   3-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTERS
logo
Microchip Technology
TC7126A MICROCHIP-TC7126A Datasheet
553Kb / 22P
   3-1/2 Digit Analog-to-Digital Converters
2002
TC7126A MICROCHIP-TC7126A Datasheet
330Kb / 28P
   3-1/2 Digit Analog-to-Digital Converters
11/29/12
logo
TelCom Semiconductor, I...
TC7126ACKW TELCOM-TC7126ACKW Datasheet
198Kb / 13P
   3-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTERS
logo
Microchip Technology
TC7126ACKW MICROCHIP-TC7126ACKW Datasheet
553Kb / 22P
   3-1/2 Digit Analog-to-Digital Converters
2002
More results

Аналогичное описание - TC7126A

производительномер деталидатащиподробное описание детали
logo
Microchip Technology
TC7106 MICROCHIP-TC7106_06 Datasheet
534Kb / 32P
   3-1/2 Digit Analog-to-Digital Converters
2006
TC7106 MICROCHIP-TC7106 Datasheet
623Kb / 26P
   3-1/2 Digit Analog-to-Digital Converters
2002
TC7126 MICROCHIP-TC7126 Datasheet
553Kb / 22P
   3-1/2 Digit Analog-to-Digital Converters
2002
logo
TelCom Semiconductor, I...
TC7126 TELCOM-TC7126 Datasheet
198Kb / 13P
   3-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTERS
logo
Microchip Technology
TC7126 MICROCHIP-TC7126_13 Datasheet
330Kb / 28P
   3-1/2 Digit Analog-to-Digital Converters
11/29/12
TC7107RCPL MICROCHIP-TC7107RCPL Datasheet
411Kb / 34P
   3-1/2 Digit Analog-to-Digital Converters
01/02/08
logo
TelCom Semiconductor, I...
TC7116 TELCOM-TC7116 Datasheet
218Kb / 14P
   3-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTERS WITH HOLD
logo
Microchip Technology
TC7116 MICROCHIP-TC7116_06 Datasheet
425Kb / 24P
   3-1/2 Digit Analog-to-Digital Converters with Hold
2006
TC7116 MICROCHIP-TC7116_13 Datasheet
322Kb / 26P
   3-1/2 Digit Analog-to-Digital Converters with Hold
11/29/12
logo
TelCom Semiconductor, I...
TC7136 TELCOM-TC7136 Datasheet
192Kb / 12P
   LOW POWER, 3-1/2 DIGIT ANALOG-TO-DIGITAL CONVERTERS
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26


датащи скачать

Go To PDF Page


ссылки URL




Конфиденциальность
ALLDATASHEETRU.COM
Вашему бизинису помогли Аллдатащит?  [ DONATE ] 

Что такое Аллдатащит   |   реклама   |   контакт   |   Конфиденциальность   |   обмен ссыками   |   поиск по производителю
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