Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.NET

X  

TC7126A Datasheet(PDF) 9 Page - Microchip Technology

Part # TC7126A
Description  3-1/2 Digit Analog-to-Digital Converters
Download  26 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC7126A Datasheet(HTML) 9 Page - Microchip Technology

Back Button TC7126A Datasheet HTML 5Page - Microchip Technology 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 Next Button
Zoom Inzoom in Zoom Outzoom out
 9 / 26 page
background image
© 2006 Microchip Technology Inc.
DS21458C-page 9
TC7126/A
3.0
DETAILED DESCRIPTION
(All Pin Designations Refer to 40-Pin PDIP.)
3.1
Dual Slope Conversion Principles
The TC7126A is a dual slope, integrating analog-to-
digital converter. An understanding of the dual slope
conversion technique will aid in following the detailed
TC7126/A operation theory.
The conventional dual slope converter measurement
cycle has two distinct phases:
• Input Signal Integration
• Reference Voltage Integration (De-integration)
The input signal being converted is integrated for a
fixed time period (TSI). Time is measured by counting
clock pulses. An opposite polarity constant reference
voltage is then integrated until the integrator output
voltage returns to zero. The reference integration time
is directly proportional to the input signal (TRI) (see
Figure ).
FIGURE 3-1:
Basic Dual Slope Converter
In a simple dual slope converter, a complete conver-
sion requires the integrator output to “ramp-up” and
“ramp-down.”
A simple mathematical equation relates the input
signal, reference voltage and integration time:
EQUATION 3-1:
For a constant VIN:
EQUATION 3-2:
The dual slope converter accuracy is unrelated to the
integrating resistor and capacitor values, as long as
they are stable during a measurement cycle. Noise
immunity is an inherent benefit. Noise spikes are inte-
grated or averaged to zero during integration periods.
Integrating ADCs are immune to the large conversion
errors that plague successive approximation convert-
ers in high noise environments. Interfering signals with
frequency components at multiples of the averaging
period will be attenuated. Integrating ADCs commonly
operate with the signal integration period set to a
multiple of the 50Hz/60Hz power line period (see
Figure 3-2).
FIGURE 3-2:
Normal Mode Rejection of
Dual Slope Converter
REF
Voltage
Analog
Input
Signal
Display
Switch
Driver
Control
Logic
Clock
Counter
Polarity Control
Phase
Control
VIN » VREF
VIN » 1.2 VREF
Variable
Reference
Integrate
Time
Fixed
Signal
Integrate
Time
Integrator
Comparator
Where:
VR = Reference voltage
TSI = Signal integration time (fixed)
TRI = Reference voltage integration time (variable)
1
RC
TSI
0
VIN(t)dt =
VRTRI
RC
V
IN
V
R
T
RI
T
SI
-------
=
30
20
10
0
0.1/t
1/t
10/t
Input Frequency
t = Measurement Period


Similar Part No. - TC7126A

ManufacturerPart #DatasheetDescription
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

Similar Description - TC7126A

ManufacturerPart #DatasheetDescription
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


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.NET
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
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