Designing an Echo Canceller System Using the TMS320C50 DSP
Texas InstrumentsThis application report describes an echo canceller system using the Texas Instruments (TI?) TMS320C50 digital signal processor (DSP). The system is based on based on low resolution time-delay estimation using the knowledge that mainly one or two active regions (depending on the number of reflections in the communication channel) characterize the impulse response of a typical echo-path in telepho
AN-1172 LP2980, LP2981, LP2982, LP2985 Micro SMD Demo Boards (Rev. B)
Texas InstrumentsThe components of each demo board vary by device type and voltage option. Lists of materials are provided which specify the correct external components to be used with each TI part type.
Understanding Open Loop Output Impedance of the PGA900 DAC Gain Amplifier (Rev. A)
Texas InstrumentsThe open-loop output impedance (ZO) of an operational amplifier is one of the most important specifications. Proper understanding of ZO over frequency is crucial for the understanding of loop gain bandwidth and stability analysis.This application note provides an in-depth understanding of the PGA900 ZO magnitude over frequency. The effects of temperature power
AN-1715 LP3943/LP3944 as a GPIO Expander (Rev. A)
Texas InstrumentsThis application report describes how to use LP3943/44 as a general-purpose input/output (GPIO)expander. It is recommended that circuit data sheets are read first and used in conjunction with thisdocument.
Using AES Encryption in CC111xFx and CC251xFx (Rev. C)
Texas InstrumentsThis application report describes the key elements and simple usage of the CC111xFx and CC251xFx Advanced Encryption Standard (AES) encryption and decryption coprocessor.
The main objective of the document is to explain the CC111xFx and CC251xFx software required to operate the AES coprocessor with and without DMA assistance.
AN-2120 Power Optimizers Partial Deployment for Single String Systems (Rev. B)
Texas InstrumentsApplication Note 2120 Power Optimizers Partial Deployment for Single String Systems
Interfacing A DSKplus With Flash Memory Daughter Board
Texas InstrumentsThis document describes a daughter board that can be plugged onto the TMS320C54x DSK-Plus. It is based on the TMS28F400 4 Megabit bit Flash memory. This application report includes the complete hardwa
Power Solution using LDO's (Rev. A)
Texas InstrumentsTMS320C6747, TMS320C6745, OMAP-L137, TPS74801, TPS73633, TPS71718 Power Solution using LDO's
Understanding the Terms and Definitions of LDO Voltage Regulators
Texas InstrumentsThis report provides an understanding of the terms and definitions of low dropout (LDO) voltage regulators and describes fundamental concepts including dropout voltage quiescent current standby current efficiency transient response line/load regulation power supply rejection output noise voltage accuracy and power dissipation. Each section includes an example to increase the understandab
IIR Filter Design on the TMS320C54x DSP Application Report
Texas InstrumentsUsing a 16-bit fixed point DSP to implement an IIR filter results in a calculation overflow of the output signal. Scaling the input removes the overflow but causes a low output signal. Boosting the output signal requires the addition of an op amp to the hardware design. This document shows an IIR software implementation using the TMS320C54x that accommodates the overflow without additional hardw
Ultrasonic Sensing for Fluid Identification and Contamination
Texas InstrumentsUltrasonic sensing utilizing Time Of Flight (TOF) measurement techniques can be used to monitor material purity/contamination levels and or to differentiate materials non-invasively. This technology has been utilized in the automotive consumer medical and food preparation markets worldwide. Ultrasonic (TOF) sensing can yield high accuracy with low power consumption for all of
Getting Started With EEMBC? ULPBench? on MSP-EXP432P401R
Texas InstrumentsThis is a getting started guide for obtaining the ULPMark?-CP score using the Embedded Microprocessor Benchmark Consortium (EEMBC) ULPBench? and EnergyMonitor with the MSP432P401R microcontroller (MCU
THS4001 SPICE Model Performance
Texas InstrumentsThis document outlines the SPICE model of the THS4001 high-speed monolithic operational amplifier. General information about the model file structure performance comparison model listing and a brief comment about symbols are included. The listing can be copied and pasted into an ASCII editor or it can be down loaded by visiting the THS4001 product folder at http://www.ti.com/sc/docs/products/a
mu-Law and A-Law Companding Using the TMS320C2xx DSP
Texas InstrumentsCompanding (compression and expansion) is a method commonly used in telephony applications to increase dynamic range while keeping the number of bits used for quantization constant. The compression is lossy but provides lower quantization error at small amplitude values than at larger values.Mu-law is a companding standard commonly used in the United States. It takes 14-bit data values and co
