Application Notes

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Application Notes

Reliability Data for TMS320LF24x and TMS320F281x Devices (Rev. B)

Reliability Data for TMS320LF24x and TMS320F281x Devices application report

Understanding Basic Analog - Active Devices (Rev. A)

This application report describes active devices and their use as the basic building blocks of all electronic equipment. Active devices coupled with passive devices create the combination needed to fulfill all circuit requirements. A select few active devices are discussed in this report.

Implementation and Applications of Current Sources and Current Receivers

Texas Instruments

This application guide is intended as a source book for the design and application of:

Current sources
Current sinks
Floating current sources
Voltage-to-current converters
(transconductance amplifiers)
Current-to-current converters (current mirrors)
Current-to-voltage converters
(transimpedance amplifiers)

AN-1548 PHYTER 100 Base-TX Reference Clock Jitter Tolerance (Rev. B)

Texas Instruments

The use of a reference clock that is less stable than those directly driven from an oscillator may be required for some applications. In addition some customer applications may require partnering with devices that operate outside of the IEEE 802.3 standard for transmitted jitter.

UCD74120 Power Sequence Requirement

Texas Instruments

UCD74120 is a Synchronous Buck Power Stage designed to work with UCD92xx Digital PWM SystemControllers. If UCD74120 is powered before UCD92xx a current limiting resistor is needed in the FLT pinpath to avoid potential device damage.

CC430 Wake-On-Radio Functionality (Rev. A)

Texas Instruments

The Wake-On-Radio (WOR) feature of the CC430 is a recommended method for conserving power in wireless systems in which the radio periodically wakes up from SLEEP mode and listens for incoming packets.

The RS-485 Unit Load and Maximum Number of Bus Connections

Texas Instruments

The TIA/EIA-485 (RS-485) standard defines a Unit Load and confines bus configurations to 32. This report explains the Unit-Load concept and how it relates to the maximum number of bus connections. Fractional Unit-Load devices such at the 1/8th Unit-Load SN65HVD21 and SN65HVD06 allow up to 256 devices on a single bus segment.

DRV8800, DRV8801 Design in Guide

Texas Instruments

DRV8800, DRV8801 DRV8800, DRV8801 Design in Guide

Power Line Communication for Lighting Apps using BPSK w/ a Single DSP Controller

Texas Instruments

DSP controllers provide the on-chip peripherals and computational power needed to implement various power electronics applications. A single-chip DSP controller allows designers to implement multiple

Designing With the MSP430FR58xx, FR59xx, FR68xx, and FR69xx ADC

Texas Instruments

Designing an application with the analog-to-digital converter (ADC) requires several considerations to optimize for power and performance. This application report discusses the basics of how you would

Optimizing Carrier & Sideband Suppression

Texas Instruments

Optimizing Carrier & Sideband Suppression

Implementing HART? Communication with the DAC8760 Family

Texas Instruments

DAC8760 Family, DAC8760 Implementing HART? Communication with the DAC8760 Family

TAS5010-5112F2EVM Application Report (Rev. A)

Texas Instruments

TAS5010-5112F2EVM Application Report

DN-41 Extend Current Transformer Range

Texas Instruments

The problems with self reset of current transformers for unipolar pulse applications can be overcome with simple forced-reset techniques derived from magnetic amplifiers. Duty factors above 90% are achievable with these techniques. This design note describes a circuit configured for forced reset and a configuration that generates a negative voltage from the current transformer.

Smart Selection of ADC/DAC Enables Better Design of Software-Defined Radio

Texas Instruments

This application report explains different aspects of selecting analog-to-digital and digital-to-analog data converters for Software-Defined Radio (SDR) applications. It also explains how ADS61xx ADCs and the DAC5688 from Texas Instruments fit properly for SDR designs.

How delta-sigma ADCs work, Part 1

Texas Instruments

Analog techniques have dominated signal processing for years, but digital techniques are slowly encroaching into this domain. The design of delta-sigma (DS) analog-todigital converters (ADCs) is approximately three-quarters digital and one-quarter analog. DS ADCs are now ideal for converting analog signals over a wide range of frequencies, from DC to several megahertz. Basically, these converters consist of an oversampling modulator followed by a digital/ decimation filter that together produce a high-resolution data-stream output.

This two-part article will look closely at the DS ADC’s core. Part 1 will explore the basic topology and function of the DS modulator, and Part 2 will explore the basic topology and function of the digital/decimation filter module.

AN-161 IC Voltage Reference has 1 ppm per Degree Drift (Rev. C)

Texas Instruments

AN-161 IC Voltage Reference has 1 ppm per Degree Drift

Using the TPS3839/1yxx as an Adjustable Supply Voltage Supervisor

Texas Instruments

TPS3839; TPS3831 Using the TPS3839/1yxx as an Adjustable Supply Voltage Supervisor

DLP? LightCrafter? FPGA Overview

Texas Instruments

DLP LightCrafter, DLP3000, DLPC300 DLP? LightCrafter? FPGA Overview

Sensored Field Oriented Control of 3-Phase Perm Magnet Sync Motors Using TMS320F2837x

Texas Instruments

This application report presents a solution to control a permanent magnet synchronous motor (PMSM) using the TMS320F2837x microcontrollers. TMS320F2837x devices are part of the family of C2000 microcontrollers, which enables the cost-effective design of intelligent controllers for three phase motors by reducing system components and increasing efficiency. With these devices, it is possible to realize far more precise digital vector control algorithms like the field orientated control (FOC). This algorithm’s implementation is discussed in this document. The FOC algorithm maintains efficiency in a wide range of speeds and takes into consideration torque changes with transient phases by processing a dynamic model of the motor.

This application report covers the following:

A theoretical background on field oriented motor control principle
Incremental build levels based on modular software blocks
Experimental results