Dallas Semiconductor Corp: Technical Briefs and Related Documents

Tech Brief 1 1-Wire Net Design Guide

This tech brief provides an overview of the 1-Wire® bus designed and developed by Dallas Semiconductor. It gives guidance on the pitfalls and solutions involved in setting up a 1-Wire Network. It also discusses active pull-ups, cabling, COM port adapters and opto-isolation. Complete circuit schematics with values and guidelines are provided along with a 1-Wire® waveform template.

Tech Brief 2 Dual-Polarity Amplifier is Controlled Digitally

An amplifier circuit which provides both inverting and non-inverting modes is described. Using a digital potentiometer, the polarity of the gain is placed under digital control. This gives the added benefit of being able to smoothly transition the gain from -1 to +1, and the circuit can be used to provide a power-on mute function for audio applications.

Tech Brief 3 Digitally Control Phase Shift

Changing the phase characteristics of a signal without affecting its amplitude is commonly accomplished with an allpass filter. This tech brief presents the basics of building phase-shift circuits and describes how to use a digital potentiometer in an allpass circuit to allow the phase shift of the circuit to be controlled digitally. A complete audio phase shifter effect device is presented which also synthesizes a pseudo-stereo signal from a monophonic input.

Tech Brief 6 Multi-Channel T1/E1 Solutions

When deciding whether to integrate T1 or E1 chips vertically or horizontally, the critical parameters are space and cost. This tech brief discusses the advantages and disadvantages of both solutions. Diagrams are included.

Tech Brief 7 DS2152 and DS2154: 8 MHz System Clock Operation

This tech brief shows how DS2152 and DS2154 PCM signals can interface to an 8 MHz system backplane to multiplex four 2.048 MHz PCM streams onto a single 8 MHz PCM stream. Diagrams are included.

Tech Brief 8 Problems and Solutions for the Year 2000

Inconsistencies in how computers handle dates plus how this will affect date accuracy when the year changes from 1999 to 2000 are discussed. A hardware solution to this problem is presented featuring Dallas Semiconductor's Year-2000 compliant timekeeping devices. Diagrams are included.

Tech Brief 9 In-Circuit Reprogramming of the DS1075 EconOscillator

The DS1075 EconOscillator can be reprogrammed in-circuit, alleviating the need to remove the device. This tech brief describes the recommended in-circuit reprogramming method. Diagrams are included.

Tech Brief 10 ESD Considerations for RS-232 Drivers

As discussed in Tech Brief 4, there is potential risk of ESD damage to CMOS devices. This tech brief discusses various methods by which they can guard against ESD damage in RS-232 drivers. Diagrams are included.

Tech Brief 11 Using the DS107K Development Kit to Program SOIC and TO-92 Packages

The DS1075K can be used to program both SOIC and TO-92 packages. This tech brief describes how to program the DS1075 in either package. Illustrations are included.

Tech Brief 12 The Effects of High-Speed Design Techniques and Test Equipment Measurement

The use of sockets for convenient programming precludes the possibility of providing optimum decouling of the DS1075 EconOscillator. Consequently, the output waveforms present on the BNC sockets of the DS1075K Development board may exhibit some distortion, or rounding, or even slight frequency errors. This tech brief discusses how this can be avoided. Illustrations are included.

Tech Brief 13 Modifying the DS1075K Board to Work With the DS1073 3.6-Volt EconOscillator

With slight modifications, the DS1075K Development Kit can be used to work with the new 3-volt version of the DS1075 EconOscillator, the DS1073 EconOscillator. The modification procedure is described and illustrations are included.

Tech Brief 15 DS1075 EconOscillator: Power Dissipation Models

The data sheet specification for DS1075 supply current is a worst-case parameter representing the highest current configuration under worst-case operating conditions. However, in the majority of applications the DS1075 will consume less than this value.

Tech Brief 16 Accuracy: What do you really need?

Any time you design an oscillator for your system there will be some sort of accuracy requirement. But accuracy can be defined and measured in many ways, and some may not be relevant to your design. Accuracy performance becomes important when you consider the trade-offs between size, complexity, cost and system requirements. This article explores several accuracy specifications, considers the type of applications where they may be important, and reviews some common oscillator implementations in this context.

Related Articles

Transmitting Data and Power Over a 1-Wire Bus
Operational overview of the Dallas Semiconductor 1-Wire interface. 1-Wire data and power transmission protocols are introduced as well as the multi-device 1-Wire Network bus configuration.

The 1-Wire Weather Station
This application example demonstrates how multiple 1-Wire chip devices can be configured in a low-cost, low-complexity, 1-Wire Network and be used to implement sophisticated weather instrumentation.

A 1-Wire Rain Gauge
This application example follow-up to the 1-Wire Weather Station demonstrates the simplicity associated with adding 1-Wire devices to an existing 1-Wire Network system. A 1-Wire rain gauge implemented with 1-Wire chip products is simply plugged into the 1-Wire bus port of the 1-Wire Weather Station to add rainfall measurement capability.

Tech Brief 1	1-Wire Net Design Guide This tech brief provides an overview of the 1-Wire® bus designed and developed by Dallas Semiconductor. It gives guidance on the pitfalls and solutions involved in setting up a 1-Wire Network. It also discusses active pull-ups, cabling, COM port adapters and opto-isolation. Complete circuit schematics with values and guidelines are provided along with a 1-Wire® waveform template.

Tech Brief 2	Dual-Polarity Amplifier is Controlled Digitally An amplifier circuit which provides both inverting and non-inverting modes is described. Using a digital potentiometer, the polarity of the gain is placed under digital control. This gives the added benefit of being able to smoothly transition the gain from -1 to +1, and the circuit can be used to provide a power-on mute function for audio applications.

Tech Brief 3	Digitally Control Phase Shift Changing the phase characteristics of a signal without affecting its amplitude is commonly accomplished with an allpass filter. This tech brief presents the basics of building phase-shift circuits and describes how to use a digital potentiometer in an allpass circuit to allow the phase shift of the circuit to be controlled digitally. A complete audio phase shifter effect device is presented which also synthesizes a pseudo-stereo signal from a monophonic input.

Tech Brief 6	Multi-Channel T1/E1 Solutions When deciding whether to integrate T1 or E1 chips vertically or horizontally, the critical parameters are space and cost. This tech brief discusses the advantages and disadvantages of both solutions. Diagrams are included.

Tech Brief 7	DS2152 and DS2154: 8 MHz System Clock Operation This tech brief shows how DS2152 and DS2154 PCM signals can interface to an 8 MHz system backplane to multiplex four 2.048 MHz PCM streams onto a single 8 MHz PCM stream. Diagrams are included.

Tech Brief 8	Problems and Solutions for the Year 2000 Inconsistencies in how computers handle dates plus how this will affect date accuracy when the year changes from 1999 to 2000 are discussed. A hardware solution to this problem is presented featuring Dallas Semiconductor's Year-2000 compliant timekeeping devices. Diagrams are included.

Tech Brief 9	In-Circuit Reprogramming of the DS1075 EconOscillator The DS1075 EconOscillator can be reprogrammed in-circuit, alleviating the need to remove the device. This tech brief describes the recommended in-circuit reprogramming method. Diagrams are included.

Tech Brief 10	ESD Considerations for RS-232 Drivers As discussed in Tech Brief 4, there is potential risk of ESD damage to CMOS devices. This tech brief discusses various methods by which they can guard against ESD damage in RS-232 drivers. Diagrams are included.

Tech Brief 11	Using the DS107K Development Kit to Program SOIC and TO-92 Packages The DS1075K can be used to program both SOIC and TO-92 packages. This tech brief describes how to program the DS1075 in either package. Illustrations are included.

Tech Brief 12	The Effects of High-Speed Design Techniques and Test Equipment Measurement The use of sockets for convenient programming precludes the possibility of providing optimum decouling of the DS1075 EconOscillator. Consequently, the output waveforms present on the BNC sockets of the DS1075K Development board may exhibit some distortion, or rounding, or even slight frequency errors. This tech brief discusses how this can be avoided. Illustrations are included.

Tech Brief 13	Modifying the DS1075K Board to Work With the DS1073 3.6-Volt EconOscillator With slight modifications, the DS1075K Development Kit can be used to work with the new 3-volt version of the DS1075 EconOscillator, the DS1073 EconOscillator. The modification procedure is described and illustrations are included.

Tech Brief 15	DS1075 EconOscillator: Power Dissipation Models The data sheet specification for DS1075 supply current is a worst-case parameter representing the highest current configuration under worst-case operating conditions. However, in the majority of applications the DS1075 will consume less than this value.

Tech Brief 16	Accuracy: What do you really need? Any time you design an oscillator for your system there will be some sort of accuracy requirement. But accuracy can be defined and measured in many ways, and some may not be relevant to your design. Accuracy performance becomes important when you consider the trade-offs between size, complexity, cost and system requirements. This article explores several accuracy specifications, considers the type of applications where they may be important, and reviews some common oscillator implementations in this context.
Related Articles Transmitting Data and Power Over a 1-Wire Bus Operational overview of the Dallas Semiconductor 1-Wire interface. 1-Wire data and power transmission protocols are introduced as well as the multi-device 1-Wire Network bus configuration. The 1-Wire Weather Station This application example demonstrates how multiple 1-Wire chip devices can be configured in a low-cost, low-complexity, 1-Wire Network and be used to implement sophisticated weather instrumentation. A 1-Wire Rain Gauge This application example follow-up to the 1-Wire Weather Station demonstrates the simplicity associated with adding 1-Wire devices to an existing 1-Wire Network system. A 1-Wire rain gauge implemented with 1-Wire chip products is simply plugged into the 1-Wire bus port of the 1-Wire Weather Station to add rainfall measurement capability.