Digital Audio Measurements
Texas InstrumentsTo perform correct measurements on a true digital audio amplifier (TDAA) it is important to understnad the characteristics of the device especially in comparison with conventional linear amplifiers such as Class-A and Class-AB. This report provides an overview of TI's proprietary digital amplification technology and information about how measurements on TDAA's must be performed in order to obtai
Build Instructions for neard (Linux NFC) for AM335x + TRF7970A
Texas InstrumentsThe purpose of this document is to describe the steps / process required to correctly build and test Linux NFC (neard) on AM335x (Cortex-A8) based BeagleBone + BeagleBone RF Cape + TRF7970ATB connecte
Using the bq27x00 With a Primary Cell Battery
Texas InstrumentsThe bq27x00 is an accurate coulomb counter and contains algorithms to dynamically compensate the available capacity for temperature and discharge rate. If direct drive from the gauge to an LED display is not required the bq27x00 can be used as an accurate gas gauge solution for a primary cell battery. Although the bq27x00 was designed for a single-cell rechargeable lithium-ion or lithium-polymer
DSP/BIOS II Technical Overview
Texas InstrumentsDSP/BIOS II is a kernel that provides run-time services which developers use to build DSP applications and manage application resources. DSP/BIOS II effectively extends the DSP instruction set with real-time run-time kernel services that form the underlying architecture or infra-structure of real-time DSP applications.The DSP/BIOS II kernel tightly integrates with the Code Composer Studio (
AN-2060 LM27402 Current Limit Application Circuits (Rev. A)
Texas InstrumentsSensing the inductor DCR voltage can be an accurate and lossless technique of obtaining current information in DC/DC regulators. The absence of a series current sense resistor permits high current and high efficiency designs at a lower cost and higher density. Inductor DCR sensing also allows continuous monitoring of the inductor current as opposed to MOSFET RDS(ON) sensing that usually samples th
Efficient Resampling Filters for the AIC111
Texas InstrumentsThe AIC111 is an ultralow-power fixed sample rate sigma-delta codec with a sample rate of 40 kHz and a usable bandwidth of 10 kHz. Typically most applications process data at sample rates of 8 kHz 16 kHz and 20 kHz. This requires that the DSP or microprocessor connected to the AIC111 decimate the incoming data from 40 kHz down to the required sampling frequency and interpolate the data back
Precision Output Current Limiting Using Average Current Monitor Feature
Texas InstrumentsPrecision Output Current Limiting Using Average Current Monitor Feature
Designing for Lowest Noise with the TPS62125
Texas InstrumentsDesigning for Lowest Noise with the TPS62125 Word Source
Differences between MSP430F67xx and MSP430F67xxA Devices
Texas InstrumentsDifferences between MSP430F67xx and MSP430F67xxA Devices
Input Impedance Measurement Using ADC FFT Data
Texas InstrumentsTexas Instruments has introduced a family of high-speed analog-to-digital converters (ADCs) suited tomeet the demand for high-speed and high-IF sampling systems. To achieve the highest overall system performance an analog front-end circuit with an antialiasing filter must drive the ADC with the highestpossible dynamic range and lowest distortions. One important parameter of the front-end circ
AN-1050 Understanding and Eliminating EMI in Microcontroller Apps
Texas InstrumentsUnderstanding and Eliminating EMI in Microcontroller Applications
Extended Memory Access Using IAR v3.42A and CCE v2
Texas InstrumentsThis application report describes how to access the extended memory in devices with memory greater than 64 KB using the large code/small data model supported by the IAR C/C++ compiler v3.42A and Code
Build a 3-Phase Sine Wave Generator with the UAF42
Texas InstrumentsA three phase sine wave oscillator can be built using one UAF42 state variable filter along with some resistors and diodes. Three output nodes are available; highpass out bandpass out and lowpass out. The signal at the bandpass and lowpass out nodes are 90° and 180° out of phase respectively with the highpass out node. An on-chip auxiliary op amp is available for use as a buffer or gain
AN-1414 LM1770 Design Reference (Rev. A)
Texas InstrumentsThis application report presents several reference designs that can be used to implement the TexasInstruments LM1770 Synchronous Buck Controller in a wide variety of configurations.
Analog Applications Journal, Q3, 1999
Texas InstrumentsAnalog Applications is a collection of analog application notes designed to give readers a basic understanding of TI products and to provide simple but practical examples for typical applications. Wri
Safety Manual for TPS65381-Q1 Multi-Rail Power Supply (Rev. A)
Texas InstrumentsTPS65381 Safety Manual for TPS6538x Multi-Rail Power Supply Family
AN-447 Protection Schemes for BI-FET Amplifiers and Switches
Texas InstrumentsApplication Note 447 Protection Schemes for BI-FET Amplifiers and Switches
AN-521 Dual Tone Multiple Frequency (DTMF)
Texas InstrumentsThe DTMF (Dual Tone Multiple Frequency) application is associated with digital telephony, and provides two selected output frequencies (one high band, one low band) for a duration of 100 ms. A benchmark subroutine has been written for the COP820C/840C microcontrollers, and is outlined in detail in this application note. This DTMF subroutine takes 110 bytes of COP820C/840C code, consisting of 78 bytes of program code and 32 bytes of ROM table. The timings in this DTMF subroutine are based on a 20 MHz COP820C/840C clock, giving an instruction cycle time of 1 ms.
