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This document provides processing decisions for the RAC internal sub-modules contained in the TCI6488 DSP device.

The popularity of companding or complementary noise reduction systems is self-evident. Nearly allmedium to high quality cassette tape decks include either Dolby&regB or Dolby C type noise reduction. Ascant few have different systems such as dbx or Hi-Com. The universal appeal of compandors to n.r.system designers is the amount of noise reduction they can offer yet one of the major reasons t

Using NiMH and Li-Ion Batteries in Portable Applications

Flow meters are becoming smarter and come with more and more communication options like low power RF or advanced options like prepayment. In addition, flow meter designs require ultra low power and in many cases in conjunction with a segment LCD driver. Typically for mid-end flow meter, the design can consist of one main HOST MCU carrying the metrology, application and communication software. The proposed design allows very quick implementation of a pre-payment function for flow meter application or any other ultra-low power application requiring segment LCD as well. The software enables a ready to be used solution to talk to a pre-payment interface: the SW communicates to the prepayment module and displays the unique corresponding ID onto the segment LCD display. The SW runs on the ultra-low power microntroller featuring a 160 segment LCD driver and can be ported to any other MSP430 microntroller of the family. Alternatively when prepayment is not required, communication on the board can be replaced with any TI sub 1GHz and/or 2.4GHz radios. The design is fully compatible with the TI RF plug-in evaluation modules and can support up to two radios talking to the MCU using SPI interface. This makes this design very suitable for water, gas meters, data collectors and applications which need segment based LCD and radio communication interfaces.

The ADP121 is a quiescent current, low dropout, linear regulator that operates from 2.3 V to 5.5 V and provides up to 150 mA of output current. The low 135 mV dropout voltage at 150 mA load improves efficiency and allows operation over a wide input voltage range. The low 30 ?A of quiescent current at full load makes the ADP121 ideal for battery-operated portable equipment.The ADP121 is available in output voltages ranging from 1.2 V to 3.3 V. The parts are optimized for stable operation with small 1 ?F ceramic output capacitors. The ADP121 delivers good transient performance with minimal board area.Short-circuit protection and thermal overload protection circuits prevent damage in adverse conditions. The ADP121 is available in a tiny 5-lead TSOT and 4-ball 0.4 mm pitch WLCSP pack-ages and utilizes the smallest footprint solution to meet a variety of portable applications.

The TMS470 family of ARM7 microcontrollers has four modes of operation: Standby Idle Halt and Run. The device starts in Run mode and the other three are considered low-power modes. Additional power savings are available by disabling the flash memory.This application report explains how to change into the low-power modes and how to disable and enable the flash.This application report also de

A dual-phase synchronous buck converter accepting an input voltage of 33Vin to 60Vin and providing an output of 12Vout capable of supplying 30A

This design is a digitally controlled 300W resonant LLC half-bridge DC/DC converter with added synchronous rectification. The resonant LLC power topology is valued for its inherently high levels of efficiency credited to high frequency: low loss resonant switching. However: implementation of such a power converter can be challenging since the control theory is based in frequency modulation of the converter rather than the more typically seen duty cycle modulation. This design guides users step-by-step through the complexities of a resonant LLC half-bridge converter: melding software and hardware design approaches to implement a complete high performance converter. The C2000™ Piccolo™ microcontroller is the digital controller for this design: enabling the resonant converter to operate at greater than 90% efficiency across wide load ranges: and with peak efficiency greater than 93%.

Use and Handling of Semiconductor Packages With Electroless Nickel/Immersion Gold (ENIG) Pad Finishes Application Report

The ADP5061 charger is fully compliant with USB 3.0 and the USB Battery Charging Specification 1.2 and enables charging via the mini USB VBUS pin from a wall charger, car charger, or USB host port.The ADP5061 operates from a 4 V to 6.7 V input voltage range but is tolerant of voltages up to 20 V. The 20 V voltage tolerance alleviates the concerns about the USB bus spiking during disconnect or connect scenarios.The ADP5061 features an internal FET between the linear charger output and the battery. This permits battery isolation and, hence, system powering under a dead battery or no batteryscenario, which allows for immediate system function on connection to a USB power supply.Based on the type of USB source, which is detected by an external USB detection chip, the ADP5061 can be set to apply the correct current limit for optimal charging and USB compliance.The ADP5061 has three factory programmable digital input/output pins that provide maximum flexibility for different systems. These digital input/output pins permit combinations of features such as, input current limits, charging enable and disable, charging current limits, and a dedicated interrupt output pin. APPLICATIONS Digital still cameras Digital video cameras Single cell Li-Ion portable equipment PDAs, audio, GPS devices Portable medical devices Mobile phones

Automotive buck for 5V @1A w/ TPS54140 and input filter to attenuate reflected ripple to source

The ADL5500 is a mean-responding power detector for use in high frequency receiver and transmitter signal chains from 100 MHz to 6 GHz. It is easy to apply, requiring only a single supply between 2.7 V and 5.5 V and a power supply decoupling capacitor. The input is internally ac-coupled and has a nominal input impedance of 50 ?. The output is a linear-responding dc voltage with a conversion gain of 6.4 V/V rms at 900 MHz. The on-chip, 1 k? series resistance at the output combined with an external shunt capacitor creates a low-pass filter response that reduces the residual ripple in the dc output voltage.The ADL5500 is intended for true power measurement of simple and complex waveforms. The device is particularly useful for measuring high crest factor (high peak-to-rms ratio) signals, such as CDMA2000, W-CDMA, and QPSK/QAM-based OFDM waveforms.The ADL5500 offers excellent temperature stability with near 0 dB measurement error across temperature. The high accuracy range, centered around +3 dBm at 900 MHz, offers ?0.1 dB error from ?40?C to +85?C over an 8.5 dB range. The ADL5500 reduces calibration requirements with low drift across a 30 dB range over temperature and process variations.The ADL5500 operates from ?40?C to +85?C and is available in a 4-ball, 1.0 mm ? 1.0 mm wafer-level chip scale package. It is fabricated on a proprietary high fT silicon bipolar process.