To subscribe to the TI Analog Connection eNewsletter, please click here. November 2010
In this issue Featured Videos

Data Converters
Power Management
Interface
Amplifiers
Audio
Applications
New Literature and Videos
Training and Seminars
Company-Authored Articles in the Media
Customer Support Contact Information

Featured video

 TPS84620
 TPS82671


Featured Block Diagram

Featured Block Diagram
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DATA CONVERTERS

12-Bit, 160-MSPS, Low-Power ADC: The ADS4126 provides the lowest power consumption (201mW) for 12 bits of resolution at 160MSPS, a savings of 5% (10mW) or greater compared to competing devices. Coupled with 2-dB better SNR, it allows designers to save power and improve performance over other 12-bit designs or reduce costs by migrating from competing 14-bit ADCs without sacrificing SNR or SFDR performance.
Resources: Data sheet, block diagram, evaluation module, app note

  • 6-dB gain in 1-dB steps for SNR/SFDR trade-off
  • High-performance 12-bit ADC core: 69.7-dBFS SNR and 86-dBc SFDR at 100-MHz IF
  • Applications: Portable, wide-bandwidth, software-defined radio, test and measurement and communications systems

ADS4126: Price (1ku): $26.00 – $31.00

 

1.2-V to 3.6-V, 12-Bit, 4-Wire Touch Screen Controller with I²C: The TSC2014—the smallest and lowest power of TI's 3rd-generation touch screen controllers for single-touch, 4-wire resistive sensors—is designed for power-sensitive, handheld applications based on advanced, low-voltage processors. Integrated preprocessing and batch delay features free the host processor to focus on other critical tasks.
Resources: Data sheet, block diagram, evaluation module, performance demo kit

  • Supports an I²C serial bus and data transmission protocol in all three defined modes: standard, fast, and high-speed
  • Drivers and control logic measure touch pressure
  • Applications: Handsets, personal navigation devices, handheld computers

TSC2014: Price (1ku): $2.00 – $2.30

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POWER MANAGEMENT

600-mA, Fully Integrated, Low-Noise, Step-Down Converter in MicroSiP™ Package: TPS82671 is a fully integrated, high-frequency device (5.5MHz) with no external inductor and input/output capacitor needed. It is the smallest 600-mA solution available, with over 90% efficiency and the lowest quiescent current (17µA).
Resources: Data sheet, block diagram, evaluation module, video

  • Regulated switching frequency: 5.5MHz
  • Spread spectrum (PWM frequency dithering) combined with high PSRR makes the device ideal for noise-sensitive applications like audio and imaging
  • Applications: Processor supply, LCD and digital TV, personal navigation device, Bluetooth® headset, wearable healthcare, smartphone handset

TPS82671: Price (1ku): $1.30 – $1.50

 

4.5-V to 14.5-V Input, 6-A Synchronous Buck, Integrated Power Solution: The TPS84620 easy-to-use integrated power solution combines a 6-A DC/DC converter with power MOSFETs, an inductor, and small passive components into a QFN package. The 9 x 15 x 2.8-mm BQFN package is easy to solder onto a printed circuit board and allows a compact point-of-load design with greater than 90% efficiency and excellent power dissipation with a thermal impedance of 13°C/W junction to ambient.
Resources: Data sheet, block diagram, evaluation module, video

  • 6-A rated output current at 85°C ambient temperature without airflow
  • Total power solution requires as few as 3 external components and eliminates loop compensation and magnetics part selection process
  • Applications: Broadband networking and communications, medical diagnostic, automated test equipment (ATE), industrial

TPS84620: Price (1ku): $7.00 – $8.05

 

4.5-V to 17-V Input, 3-A Synchronous Step-Down SWIFT™ Converter: The TPS54320 full-featured converter is optimized for small designs through high efficiency and integrated high-side and low-side MOSFETs. With the fast 1.2-MHz operating frequency to reduce the output filter size, the total power supply solution size can be less than 170 square millimeters, which saves up to 15% total PCB area over slower 350-kHz designs.
Resources: Data sheet, block diagram, evaluation module

  • 0.8-V reference with 1% accuracy over temperature and pre-bias startup capability
  • Applications: Broadband networking and communications, servers and workstations, compact PCI, PCI Express applications, embedded processor DSP/FPGA apps

TPS54320: Price (1ku): $1.70 – $2.00

 

3.5-MHz, 1.5-A Current Limit, 92%-Efficient Boost Converter for Battery Backup Charging: The TPS61251 adjusts the average input current through an external resistor and charges bulk capacitors in the range of Farads. The device implements an enhanced power-safe mode, (snooze mode) with very low quiescent current, resulting in high efficiency across the load range, especially at very light loads.
Resources: Data sheet, block diagram, evaluation module

  • Resistor-programmable input current limit from 100 to 1500mA with ±10% accuracy @ 500mA
  • 1.0-µH inductor 2-mm x 2-mm QFN package
  • Applications: Source current limited applications, Li-Ion applications, battery backup and audio

TPS61251: Price (1ku): $1.60 – $1.85

 

Secondary-Side Synchronous Rectifier Controller: This high-performance Green Rectifier controller and driver for N-channel power MOSFET devices is used for low-voltage output, secondary-side synchronous rectification. The combination of controller and MOSFET emulates a near-ideal diode rectifier that reduces power dissipation and improves overall power supply efficiency up to 90%, allowing for higher density, small form factor designs.
Resources: Data sheet, block diagram, evaluation module

  • Automatic light load management
  • Highly integrated control reduces external components with up to 5% reduction in power supply costs
  • Applications: AC/DC adapters, mobile chargers (cell phone, iPod, set-top box), PCTV card/dongle, appliance power supplies, bias supplies

UCC24610: Price (1ku): $0.75 – $0.95

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INTERFACE

I²C-Controlled Keypad Scan IC with Integrated ESD Protection: The TCA8418E frees up the processor from having to scan the keypad for presses and releases, providing power and bandwidth savings. The device also offers enhanced ESD protection of IEC 61000-4-2 (level 4), support for up to 80 keys, and three-key combinations.
Resources: Data sheet, evaluation module

  • 2.0-mm x 2.0-mm chip-scale package for 70% board space savings (YFP option)
  • Supply range: 1.65V to 3.6V
  • Applications: Multimedia, smartphone, netbook, PDA

TCA8418E: Price (1ku): $1.20

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AMPLIFIERS

1-MHz, Precision, Low-Noise, Rail-to-Rail Output, 36-V JFET Op Amp: OPA2140 combines high precision and FET input with very low noise and low operating voltage (down to 4.5V). Offset voltage of 120µV (max) and offset drift of 1µV/°C (max) guarantee high accuracy and stability over the full industrial temperature range.
Resources: Data sheet, diagram, reference design, spice model

  • Low noise: 5.1nV/√Hz (1kHz); 1/f noise: 250nVpp (0.1-10Hz)
  • FET input: Ib = 10pA (max)
  • Applications: Battery-powered instruments, industrial controls, medical instrumentation, data acquisition systems, photodiode amplifiers, automatic test equipment (ATE)

OPA2140: Price (1ku): $2.70 – $3.15

 

Single-Port, High Output Current VDSL2 Line Driver with Power Control: The OPA2670 is a 12-V, fully differential op amp that delivers ITU-T G.993.2 support of Profile 8a through Profile 30a for VDSL2 line driver applications.
Resources: Data sheet, block diagram

  • Wideband +12-V operation: 420MHz (G = +5V/V)
  • 5000V/ms differential slew rate
  • Applications: Power line modem, xDSL line driver (G.993.2), cable modem driver, broadband video line driver and ARB line driver

OPA2670: Price (1ku): $1.25 – $1.45

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AUDIO

10-W, Filter-Free, Stereo Class-D Amp with Filter-Free, Advanced EMI Suppression Technology: The TPA3117D2’s advanced EMI suppression technology eliminates the need for costly inductor-based output filters, reducing the bill of materials by as much as 50%. The device, designed for consumer audio applications, also features SpeakerGuard™ protection circuitry and advanced audio performance.
Resources: Data sheet, block diagram, evaluation module

  • Excellent THD+N and click and pop performance
  • 15W/16V/8Ω (10% THD + noise)
  • Applications: LCD and digital TV, notebook PC, consumer audio equipment

TPA3117D2: Price (1ku): $1.85 – $2.15

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APPLICATIONS
Telecom Base Band Unit
General Lighting
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NEW LITERATURE AND VIDEOS
Guides:
2010 Clocks and Timing Selection Guide
Point-of-Load (POL) Power Solutions for Industrial Designs
High Volume Linear and Standard Linear & Logic 5-Minute Guide
System-Level ESD/EMI Protection Guide
Application Notes:
Stereo AGC Functionality for the TLV320AIC3254
TLV320AIC32x4 Sleep and Standby Modes
Determining Minimum Acquisition Times for SAR ADCs
XIO2221 Implementation Guide
SymPol™ Transceivers are Immune to Cross-wire Faults
TLK6002 Board Design Guidelines
Powering Freescale™ i.MX25 Using TPS65051
Qualifier TJ = TA Defined
TPS40211 – SEPIC Design for MR-16 LED
Feedback Loop Design of an LLC Resonant Power Converter
TPS65921 PCB Layout Guidelines
Videos:
Universal Charging Host-Side Power Switch Solution
TPD4S1394 Firewire Saver Demo
Xilinx® Development Platforms and the TI Power Solutions
USB Power Protection & Control Solutions from Texas Instruments
TI HiRel High Temp Solutions for Downhole Drilling
HiRel Space Overview
HiRel High Temperature Products Overview
Lowering the Power Consumption of Your Design
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TRAINING AND SEMINARS

eTech Day Virtual Training December 9th: Join TI for a day packed with online technical design seminars and interactive problem solving. Chat with TI subject matter experts who will be available on the TI E2E™ Community. For session topics and to register, visit www.ti.com/etechdays.

 

FPGA-Based System Design with High-Speed Data Converters (in Europe): Join design experts from Avnet Electronics Marketing and Texas Instruments for an in-depth and hands-on, two-day workshop that will focus on integrating high-speed data converters using FPGA-based digital signal processing techniques. Attendees will work with the latest generation Xilinx Virtex®-6 platform, tightly coupled with TI’s high-speed data converters. Workshops in England, Israel and Sweden.
Register now.

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COMPANY-AUTHORED ARTICLES IN THE MEDIA
Trends in Data Conversion for Medical Applications,” by Steven Dean. Electronic Products, August 2010.
What is Ambient Temperature, Anyway, and Why Does it Matter?,” by Matt Romig. Power Management DesignLine, August, 2010.
SIGNAL CHAIN BASICS Part 44: Get the Best from Your Home Audio System While Maintaining Low Power and High-Efficiency Operation,” by Dafydd Roche. Planet Analog, August 2010.
POWER TIP #26: Current Distribution in High-Frequency Conductors,” by Robert Kollman. Power Management DesignLine, August 2010.
BAKER'S BEST: How Voltage References Affect Mixed-Signal Parts,” by Bonnie Baker. EDN, August 2010.
How Audio Processing Algorithms Help Improve Sound from Small Speakers,” by Luca Cacioli. Audio Design Line, August 2010.
Taming the Synchronous Buck-Switching Waveform,” by Josh Mandelcorn, Low-Power Design, August 2010.
Power Management Solutions for Different Circuitry Blocks,” by Rich Nowakowski. ECN, August 2010.
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CUSTOMER SUPPORT CONTACT INFORMATION
Visit TI's E2E™ Community and interact with your peer engineers, TI engineers, and other experts in order to ask questions, share knowledge, explore ideas, and help solve problems.
Product Information Centers
 • Americas
 • Europe, Africa, Middle East
 • Asia/Pacific
 • Japan
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