To subscribe to the TI Analog Connection eNewsletter, please click here. March 2012
In this issue   Featured Video

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



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Featured video
Thunderbolt™ Technology Introduction

Featured Block Diagram
Featured Block Diagram
Active Noise Cancellation (ANC)

Featured EVM
Featured EVM
TRF3765 EVM

AMPLIFIERS

36-V, microPower, Rail-to-Rail Output, Dual, General-Purpose Op Amp in microPackage
The OPA170, OPA2170 and OPA4170 (OPAx170) are a family of 36-V, single-supply, low-noise operational amplifiers that feature microPackages with the ability to operate on supplies ranging from +2.7V (±1.35V) to +36V (±18V). They offer good offset, drift and bandwidth with low quiescent current. The single, dual and quad versions all have identical specifications for maximum design flexibility.
Resources: Datasheet, pin/package options, active filter design application, TINA-TI™ spice model, evaluation module

  • RFI filtered inputs
  • Input range includes the negative supply; input range operates to positive supply
  • Applications: Tracking amplifier in power modules, merchant power supplies, strain gauge amplifiers, precision integrators, battery-powered instruments, test equipment

OPA2170: Price (1ku): $0.60 Buy NowDigi-Key -- Buy now!

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DATA CONVERTERS

Dual-Channel, Low-Power, 12- and 10-Bit, 500-MSPS Digital-to-Analog Converters
The DAC3152 and DAC3162 are low-power, low-latency, high-dynamic-range, dual-channel, 10- and 12-bit, pin-compatible family of digital-to-analog converters (DACs) with a sample rate as high as 500MSPS. The DACs interface seamlessly with the high-performance TRF370333 analog quadrature modulator for direct upconversion architectures. Digital data for both DAC channels is interleaved through a single LVDS data bus with on-chip termination. The high input rate of the devices allows the processing of wide-bandwidth signals.
Resources: Datasheet, block diagram, IBIS model, DAC3152 evaluation module, DAC3162 evaluation module

  • LVDS input data bus: Interleaved DDR data load
  • High DC accuracy: ±0.25 LSB DNL (10 bit), ± 0.5 LSB INL (12 bit)
  • Simple control: No software required
  • Applications: Base stations, wideband communications, medical instrumentation, test and measurement

DAC3162 / DAC3152: Price (1ku): $9.15 Buy NowDigi-Key -- Buy now!

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POWER MANAGEMENT

Single-Inductor, Multiple-Output (SIMO) Regulator
The TPS65135 is a high-efficient, single-inductor, dual-output converter. Due to its single-inductor multiple-output (SIMO) technology, the converter uses a minimum of external components. The device operates with a buck-boost topology and generates a positive and a negative output voltage above or below the input voltage rail. The SIMO technology enables excellent line and load regulation required to avoid disturbance of a mobile phone display as a result of input voltage variations that occur during transmit periods. The device can also be used as a standard ±supply as long as the output current mismatch between the rails is smaller than 50 percent.
Resources: Datasheet, block diagram, evaluation module

  • 2.5-V to 5.5-V input voltage range
  • 750-mW output power at VIN = 2.9V
  • Positive output voltage up to 6V; negative output voltage down to -7V
  • Applications: Active-matrix OLED power supply, LCD power supply, general dual power supply applications, LCD for smartphone and tablet

TPS65135: Price (1ku): $1.20 Buy NowDigi-Key -- Buy now!

 

Single-Channel, Current-Limited USB Power Distribution Switch
The TPS20xxC power-distribution switch family is intended for applications such as USB where heavy capacitive loads and short-circuits are likely to be encountered. This family offers multiple devices with fixed current-limit thresholds for applications between 0.5A and 2A.
Resources: Datasheet, block diagram, PSpice transient model, evaluation module

  • Rated currents of 0.5A, 1A, 1.5A, 2A
  • ±20% accurate, fixed, constant current limit
  • Fast over-current response: 2µs
  • Applications: USB ports/hubs, laptops, HDTVs, set-top boxes, short-circuit protection, VOIP phones

TPS2001C: Price (1ku): $0.55 Buy NowDigi-Key -- Buy now!

 

High-Efficiency, 5-A Step-Down Regulator with Integrated Switcher
TPS53316 provides a fully integrated 3.3-V or 5-V input, synchronous buck converter with 16 total components in 200mm2 of PCB area. Due to low RDS(on) and TI proprietary SmoothPWM™ skip mode of operation, it enables 96 percent peak efficiency and over 90 percent efficiency at load as light as 100mA. It requires only two 22-µF ceramic output capacitors for a power-dense, 5-A solution.
Resources: Datasheet, PSpice transient model, evaluation module, Power Stage Designer™

  • Voltage mode control
  • Single-rail input
  • Selectable frequency
  • Applications: Servers, DDRs and termination power supplies, switching power equipment, storage, printers

TPS53316: Price (1ku): $2.55 Buy NowDigi-Key -- Buy now!

 

4.5-V to 18-V Input, Dual 2-A Output, Synchronous Step-Down SWIFT™ Converter
The TPS54295 is a dual, adaptive on-time D-CAP2™ mode synchronous buck converter. The TPS54295 enables system designers to complete the suite of various end equipment’s power bus regulators with a cost effective, low component count and low standby current solution. The main control loops of the TPS54295 use the D-CAP2 mode control, which provides a very fast transient response with no external compensation components. The TPS54295 is able to adapt to both low equivalent series resistance (ESR) output capacitors, such as POSCAP or SP-CAP, and ultra-low ESR ceramic capacitors.
Resources: Datasheet, block diagram, SwitcherPro™ switching power supply design tool, evaluation module, Power Stage Designer

  • Fast transient response
  • No external parts required for loop compensation
  • Compatible with ceramic output capacitors
  • Applications: Digital TVs power supplies, networking home terminals, digital set-top boxes, DVD player/recorders, gaming consoles

TPS54295: Price (1ku): $3.50 Buy NowDigi-Key -- Buy now!

 

1.5-A Dual-Input Switch-Mode Charger with USB-OTG Support
The bq24140 is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-Iion and Li-Polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I2C interface. The IC integrates two synchronous PWM chargers, power MOSFETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small WCSP package.
Resources: Datasheet, block diagram, IBIS model, evaluation module

  • Charge battery and provide USB-OTG support at the same time
  • High-accuracy voltage and current regulation
  • Applications: Mobile phones, smart phones, MP3 players, handheld devices

bq24140: Price (1ku): $1.60 Buy NowDigi-Key -- Buy now!

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CLOCKS AND TIMERS

Integer-N/Fractional-N PLL with Integrated VCO
The TRF3765 is a wideband Integer-N/Fractional-N frequency synthesizer with an integrated, wideband voltage-controlled oscillator (VCO). Programmable output dividers enable continuous frequency coverage from 300MHz to 4.8GHz. Four separate differential, open-collector RF outputs allow multiple devices to be driven in parallel without the need of external splitters. The TRF3765 also accepts external VCO input signals and allows on/off control through a programmable control output.
Resources: Datasheet, functional diagram, evaluation module

  • Output frequencies: 300MHz to 4.8GHz
  • Low RMS jitter: 0.35ps
  • Applications: Wireless infrastructure, wireless local loop, point-to-point wireless access, wireless MAN wideband transceivers

TRF3765: Price (100u): $8.15 (Package IRHBT) Buy NowDigi-Key -- Buy now!

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INTERFACE

3.3-V Full-Duplex RS-485 Drivers and Receivers
The SN65HVD37 combines a robust differential driver and a receiver with high noise immunity for demanding industrial applications. The driver differential outputs and the receiver differential inputs are separate pins to form a bus port for full-duplex (four-wire) communications. The driver and receiver can be independently enabled, and feature a wide common-mode voltage range, making this device suitable for multi-point applications over long cable runs. The SN65HVD37 is characterized over the temperature range of –40°C to +85°C.
Resources: Datasheet, IBIS model, evaluation module

  • Low-current standby mode: <1µ (typ)
  • Operational quiescent current: <1mA
  • High receiver hysteresis for noise immunity: 60mV (typ)
  • Applications: Telecommunication equipment, industrial automation, process automation, building automation, point-of-sale (POS) terminals

SN65HVD37: Price (1ku): $1.75 Buy NowDigi-Key -- Buy now!

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TOOLS AND MODELS

New Additions to the TI WEBENCH® Designer:
Switchers and LDOs: LM2990, LM2991, TPS84610, TPS5401, TPS54331
Try them from the WEBENCH® start panel on www.ti.com

New Additions to the TI WEBENCH FPGA/µP Architect:
Hot Swap Controllers: LM25061, LM25069, LM5069
Try them from the WEBENCH start panel on www.ti.com

Model Update
Partial list of models released in February 2012:

SPICE Macro: LMP7721, LMP91050, TPS54618, TPS65251, TPS7A4001, TLV62080, TLV62130, TLV62150, TLV70245, TLV7111533D, TLV71133285D, TPS62080A, TPS62733, UCC27511, LMP8278Q, LMV881, TPA2080D1

Get more models: Devices supported by SPICE models

IBIS: AMC7812, CDCE913, CDCM9102, HD3SS3415, PCM2707C, SN75DP126, TLV320AIC3262, TS3DV621, TSU6111A

Get more models: Devices supported by IBIS models

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APPLICATIONS
•  Field Transmitter: Pressure Sensor

•  Field Transmitter: Temperature Sensor

•  Point of Sale

•  Server
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NEW LITERATURE AND VIDEOS
Guides:
High-Speed Signal Conditioning Solutions Infrastructure and Enterprise Applications
NexFET™ Power MOSFETs
Power Management for Altera FPGAs
Power Management Units for Embedded Processors
Power Management Solutions for Stellaris® ARM® Cortex MCUs
TI Solutions for Tablets and eBooks
Application Notes:
TRF3765 Synthesizer Lock Time
Band-Pass Filter Design Techniques for High-Speed ADCs
Design Procedures for the TPS54120
Building a Wireless Power Transmitter
UCC25230 Bias Power-Supply Design Review
Optimizing Resistor Dividers at a Comparator Input
Videos:
LMP91200 Integrated pH Sensor AFE Overview
Thank an Engineer: Sonar
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TRAINING AND SEMINARS
Technology Days 2012: Technology Days are full-day technical presentations on new products, TI solutions in key applications, and technology innovations. Topics vary by location and may include signal chain, wireless connectivity, embedded processors and microcontrollers, medical applications, and battery management and power. Click on your location to see the seminars and workshops offered.

 • May 2St. Paul, MN
 • May 8Dallas, TX
 • May 15   Cleveland, OH
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COMPANY-AUTHORED ARTICLES IN THE MEDIA
Analog technique simplifies LED dimming in portable applications,” by Chris Glaser. LED Magazine, December 2011.
POWER TIP #42 (Part 1 of 2): Discrete devices – a good alternative to integrated MOSFET drivers,” by Robert Kollman. Power Management DesignLine, December 2011.
With today’s design tools, you don’t have to copy your father’s schematics,” by Rick Downs. Electronic Design, December 2011.
Standardized approach feeds wireless power,” by Bill Johns and Michael Knight. Microwaves & RF, December 2011.
Analysis and measurement of intrinsic noise in op amp circuits Part XI: Photodiode amplifier noise,” by Art Kay and Bryan Zhao. Engenius, December 2011.
BAKER'S BEST: Designing with temperature sensors, Part 4: Thermocouplers,” by Bonnie Baker. EDN, December 2011.
SIGNAL CHAIN BASICS Part #60: Tracking down spurious signals in high-speed ADCs,” by Robert Keller. EETimes, December 2011.
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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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The platform bar, E2E, D-CAP2, NexFET, Power Stage Designer, SmoothPWM, SwitcherPro, SWIFT and TINA-TI are trademarks, and Stellaris and WEBENCH are registered trademarks, of Texas Instruments. All other trademarks are the property of their respective owners.

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