Conditioning a Switch-mode Power Supply Current Signal Using TI Op Amps
Texas InstrumentsThe switch-mode power supply primary current is often sensed using a power resistor. Using an op amp to amplify the current-sense signal can reduce cost and improve noise performance and efficiency. T
AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B)
Texas InstrumentsThis application note discusses the operation and compensation of linear regulators.
Delta-Sigma ADC Design for Bridge Sensor Applications
Texas InstrumentsThis application report reviews several different types of bridge sensors including characteristics of each type and discusses the key parameters of delta-sigma (ΔΣ) analog-to-digital converters (ADCs) at the system level. Additionally the parameters of a ΔΣ ADC are considered for use in common bridge sensor applications
Nine-Axis Sensor Fusion Using Direction Cosine Matrix Algorithm on MSP430F5xx (Rev. A)
Texas InstrumentsThis application report explains the implementation of an Attitude and Heading Reference System (AHRS) using the ultra-low-power MSP430F5xx microcontroller a magnetometer a gyroscope and an accelerometer on all three axes. The calibration of the sensors is key to the accuracy of the algorithm therefore the sensors’ output must be calibrated before being input to the Direction Cosine Matrix (
AN071 -- CC2430 to CC2530 Migration Guide
Texas InstrumentsAN071 -- CC2430 to CC2530 Migration Guide
A Low Noise, Low Distortion Design for Antialiasing and Anti-Imaging Filters
Texas InstrumentsIn any digitizing system, antialiasing and anti-imaging filters are used to prevent the signal frequencies from "folding back" around the sample frequency and causing false (or alias) signals from app
Using the TMS320VC5510 Bootloader (Rev. C)
Texas InstrumentsThis document describes the features of the on-chip bootloader provided with the TMS320VC5510 Digital Signal Processor (DSP). Included are descriptions of each of the available boot modes and any interfacing requirements associated with them instructions on generating the boot table and information on migration from the prototype (TMX320VC5510 revision 1.x) to the production (TMS320VC5510) boot
Battery Charger Termination Issues With System Load Applied Across Battery
Texas InstrumentsBattery charger ICs base their full charge termination on either peak voltage detect (PVD/-dV) for nickel chemistries (bq2000, bq2002, and bq2004) or current taper for Li-ion batteries (bq24010, bq240
Predictive Gate Drive Boosts Converter Efficiency
Texas InstrumentsPredictive Gate Drive™ is a novel digital control-driven technique that optimizes MOSFET turn-on and turn-off delays in synchronous rectifiers. It uses a closed loop feedback system to detect body-diode conduction and continuously adjusts dead-time delays to minimize the conduction time interval. Depending upon operating frequency and output voltage the Predictive Gate Drive™ control
TMS320DM6441 Power Consumption Summary Application Report
Texas InstrumentsThis document discusses the power consumption of the Texas Instruments TMS320DM6441 digital media System-on-Chip (DMSoC). Power consumption on the DM6441 device is highly application-dependent so a spreadsheet is provided to model power consumption for a user’s application. To get good results from the spreadsheet realistic usage parameters must be entered. The low-core voltage and other power d
TLC320AD57C Sigma-Delta Stereo Analog-to-Digital Converter
Texas InstrumentsThe TLC320AD57C (?AD57C) is a sigma-delta stereo A/D converter providing 18-bit resolution with a signal-to-noise ratio of 97dB and a dynamic range of 91 dB. The device consists of two synchronous conversion path with a decimal decimation filter following the 64X oversampling sigma-delta modulator. This document describes the ?AD57C functions provides circuit configuration schematics and characte
Phase-Lock Loop-Based (PLL) Clock Drivers: Benefits Versus Costs (Rev. A)
Texas InstrumentsThis document provides an overview of a PLL clock driver. The advantages and disadvantages of PLLs and the cost in designs are discussed. TI manufactures three low-voltage high-performance PLL clock drivers the CDC2582 CDC2586 and the CDC2586.
Fractional/Integer-N PLL Basics
Texas InstrumentsPhase Locked Loop (PLL) is a fundamental part of radio wireless and telecommunication technology. The goal of this document is to review the theory design and analysis of PLL circuits. PLL is a simple negative feedback architecture that allows economic multiplication of crystal frequencies by large variable numbers. By studying the loop components and their reaction to various noise sources we
Audio Power Amplifier Solutions for New Wireless Phones
Texas InstrumentsWireless phones continue to gain additional features making them more valuable to the end user. Many of these features involve increased audio functionality and hence some additional design effort on the audio portion of the phone. This paper gives an overview of audio amplifiers before describing different audio architectures that can be used to implement features like ear-bud speakers stereo
MSP430 Advanced Power Optimizations: ULP Advisor SW and EnergyTrace Technology
Texas InstrumentsMSP430 microcontrollers are designed specifically for ultra-low-power applications. Features such as multiple low-power modes instant wakeup intelligent autonomous peripherals and much more to enable such ultra-low-power capabilities. Texas Instruments provides valuable tools to help the programmer fully use these benefits and optimize power consumption of the target application. This app
ULP Temperature-Compensated RTC on MSP430F6736
Texas InstrumentsULP Temperature-Compensated RTC on MSP430F6736 Written by Chinese Engineer
DN112 -- Using UART in CC111xFx CC243x CC251xFx and CC253xFx (Rev. B)
Texas InstrumentsThis design note describes the key elements and simple usage of the CC111xFx/CC243xFx/CC251xFx/CC253xFx USART peripheral in UART mode. The main objective is to explain the CC111xFx/CC243xFx/CC251xFx/CC253xFx software required to operate the UART with and without DMA support.
Expanded System Monitoring Functions with UCD9080 (Rev. A)
Texas InstrumentsExpanded System Monitoring Functions with UCD9080
CAN Bus Bootloader for RM46 MCU
Texas InstrumentsA bootloader enables field updates of application firmware. A controller area network (CAN) bootloader enables firmware updates over the CAN bus. The CAN ootloader described in this application report is based on the Hercules™ ARM® Cortex™-R4 microcontroller. This application report describes the CAN protocol used in the bootloader and details each supported command.
