A designed experiment evaluated the influence of several variables on appearance and strength of Pb-free solder joints. Components with leads finished with nickel-palladium-gold (NiPdAu) were used from Texas Instruments (TI) and two other integrated circuit suppliers. Pb-free solder paste used was tin-silver-copper (SnAgCu) alloy. Variables were printed wiring board (PWB) pad size/stencil apertu
The OMAP5910™ device features a new dual-core architecture from Texas Instruments™ (TI) that is optimized for multimedia applications in a low-power environment. It couples two processors—a TI enhanced TI925T™ general-purpose processor and an ultralow-power TMS320C55x™ (C55x™) DSP—with a rich set of peripherals and powerful interfaces to achieve optimal pe
This reference design is for the TMS320DM335/DM355 digital signal processor (DSP) and accounts for voltage current and sequencing requirements. The operating input voltage ranges from 2 V to 5.5 V for Li-ion batteries and 3 AA batteries. This design also can work with 2 AA batteries with some limitations. The design is optimized for efficiency over the full range of operation and low overall cos
This application report shows a general step-by-step Type-III compensation design procedure for current-mode step-down dc/dc converters as well as the PMP5532 design example using the Texas Instruments TPS40055 step-down converter integrated circuit.This report also illustrates how to achieve high efficiency in a step-down converter using a wide-input voltage range. In addition to the Type-I
The enhanced DMA (EDMA) controller of the TMS320C621x™/TMS320C671x™ devices is a highly efficient data transfer engine capable of maintaining transfers at up to 1800 MB/sec at a 225 MHz CPU clock frequency. This document details actual bandwidth achieved under various operating conditions. Ideal transfer bandwidth is explored in TMS320C6000 EDMA IO Scheduling and Performance (S
The bq275xx gas gauge integrated circuits (IC) can use an I2C line for communication with the host system. It is necessary to allow application-layer software on the host system to access parameters made available by the gas gauge IC. Multiple levels of abstraction are between the gauge and a given application. This document describes an example implementation of each of these layers in an effo
This application report describes the implementation of a single-phase electronic electricity meter using the Texas Instruments MSP430F673x(A) metering processor. It also includes the necessary inform
The PC100 standard establishes design parameters for the PC SDRAM DIMM that is designed to operate at 100 MHz. The 168-pin 8-byte registered SDRAM DIMM is a JEDEC-defined device (JC-42.5-96-146A). Some of the defined signal paths include data signals address signals and control signals. This application report discusses the SN74ALVC16835 18-bit universal bus driver that is available from T
This application note helps users to begin working with the TLV320AIC3x Configuration Tool. Using easy-to-understand graphics, this report shows how to generate a configuration for the complex audio c
The USB Human Interface Device (HID) class is one of the most widely-supported device classes among operating systems. Although originally developed for mice and keyboards, it has many advantages in g
This application note presents a solution to control a permanent magnet synchronous motor (PMSM) using the TMS320F2803x microcontrollers along with the DRV830x-HC-EVMs. The two EVMs that are targeted are the DRV8301-HC-EVM and the DRV8302-HC-EVM which showcase the DRV8301 and DRV8302 Three Phase Pre-Drivers with Dual Current Shunt amplifiers and Buck Converter. TMS320F2803x devices are part of th
The multi-drop SCSI bus has an inherent problem as drives are added to the SCSI bus the impedance of the bus drops. Some Ultra160 and Ultra320 systems may not operate at rated speed because of errors or the SCSI domain validation (SDV) adjusting the speed down to a level that will operate.