Download Analog Interfacing to Embedded Microprocessor Systems. Real by Stuart Ball PDF

By Stuart Ball

  • Provides hard-to-find info on interfacing analog units and applied sciences to the simply electronic global of embedded microprocessors. supplies the reader the perception and viewpoint of a true embedded structures layout engineer, together with counsel that just a hands-on expert may recognize. Covers very important concerns for either and software program systmes whilst linking analog and electronic units. -Embedded know-how ...a accomplished resource on interfacing the true global to microprocessors may still end up worthwhile to embedded platforms engineers, scholars, technicians, and hobbyists. an individual serious about connecting the analog atmosphere to their electronic machines, or troubleshooting such connections will locate this e-book specifically beneficial. - Embedded expertise ordinarily, for all of the sections, there are many uncomplicated diagrams and in addition the math is saved to an easy point. ...I like this publication and suggest it as an advent to the topic for domestic use, scholars and SW Engineers. - Chris Hills within the ACCU journal CVu ...there are lots of easy diagrams and likewise the mathematics is saved to an easy point. i admire this publication and suggest it as an creation to the topic for domestic use, scholars and engineers. -Chris Hills within the ACCU journal CVu

Content:
Preface

, Page ix
Introduction

, Page xi
1 - approach Design

, Pages 1-12
2 - Analog-to-Digital Converters

, Pages 13-46
3 - Sensors

, Pages 47-90
4 - Time-Based Measurements

, Pages 91-106
5 - Output keep watch over Methods

, Pages 107-143
6 - Solenoids, Relays, and different Analog Outputs

, Pages 145-169
7 - Motors

, Pages 171-213
8 - Electromagnetic Interference

, Pages 215-223
9 - High-Precision Applications

, Pages 225-241
10 - normal Interfaces

, Pages 243-246
11 - Analog Toolbox

, Pages 247-273
Appendix A - Opamp Basics

, Pages 275-286
Appendix B - Pulse Width Modulation

, Pages 287-297
Appendix C - important URLs

, Pages 299-300
Appendix D - Python Code for bankruptcy eleven; Excel information for bankruptcy 4

, Pages 301-306
Glossary

, Pages 307-309
Index

, Pages 311-322

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Additional info for Analog Interfacing to Embedded Microprocessor Systems. Real World Design

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478 229 112 74 24 In a real application, you could use a spreadsheet to calculate the effects of all the resistors, including the thermistor itself. In this simple application, just varying Rh Sensors 55 and RL by 1% throws the result offby 5 counts at 10~ This may or may not be a problem, d e p e n d i n g on the accuracy required. 1% resistors. This would give the following result. 478 229 112 74 24 This is m u c h closer to the ideal result. O t h e r factors that would need to be included in a real application would be the tolerance of the voltage reference and the tolerance of the thermistor itself.

This capacitance is about 150 pf. When a conversion starts, this capacitott is disconnected from the input. When a conversion ends, the capacitor is again connected to the input, and it must charge up to the value of the input pin before another conversion can start. In addition, there is an internal 150ohm resistor in series with the input capacitor. Consequently, the MAX 151 specifies a delay between conversions of at least 500 ns if the source impedance driving the input is less than 509t. 5 laS.

Reference Voltage T h e Microchip devices allow you to use one input pin as a reference voltage. This is normally tied to some kind of precision reference. T h e value read from the A/D converter after a conversion is" Digital w o r d - ( V i n / V r e f ) x 256 T h e Microchip parts also permit the reference voltage to be internally set to the supply voltage, which permits the reference input pin to be a n o t h e r analog input. In a 5 V system, this means that V r e f is 5 V. 2V x 256 = = 1631o - A316 Vref 5V Analog Interfacing to Embedded Microprocessor Systems However, the result is d e p e n d e n t on the value of the 5 V supply.

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