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September 2009 |
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| In this issue |
Featured Video |
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16-, 14-, 12-Bit, 6-Channel, Simultaneous Sampling Analog-to-Digital Converters: The ADS8556, ADS8557, and ADS8558 SAR ADCs combine the latest generation 16-bit SAR architecture with a software selectable high-voltage front end capable of accepting ±12V inputs. The devices support data rates of up to 730kSPS in parallel interface mode or up to 500kSPS if the serial interface is used.
Resources:
Data sheet, Video
- Bus width of the parallel interface can be set to 8 or 16 bits
- In serial mode, up to three output channels can be activated
- Applications: Power quality measurement, protection relays, multi-axis motor control, PLCs, industrial data acquisition
ADS8558 Price (1ku): $ 9.85/ $ 8.95 |
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Lowest Drift and Widest Operating Temperature, Quad-Channel ±15V High Accuracy DAC: The DAC8734 provides the widest output range, highest temperature range, lowest drift, a programmable output gain, user calibration capability, and the lowest initial error. Available in a 6x6mm package, it is the smallest high accuracy + high voltage bipolar DAC.
Resources:
Data sheet
- 16-bit (DAC8734), 14-bit (DAC8234), and 12-bit (DAC7716) resolutions
- Zero error TC and gain error TC = ± 5ppm/C
- Applications: Equipment requiring high voltage and high accuracy–automatic test equipment, instrumentation, industrial process control, communications
DAC8734 Price (1ku): $ 27.95/ $ 26.95 |
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Soundplus™, High-Performance Bipolar-Input Audio Op Amps: The OPA1611 (single) and OPA1612 (dual) bipolar-input op amps achieve very low 1.1-nV/√Hz noise density with an ultra-low distortion of 0.000015% at 1kHz. The devices offer rail-to-rail output swing to within 600mV with a 2-kΩ load, which increases headroom and maximizes dynamic range.
Resources:
Data sheet
- High output drive capability of ±30mA
- Dual version features completely independent circuitry for lowest crosstalk and freedom from interactions between channels, even when overdriven or overloaded
- Applications: Professional audio equipment, microphone preamps, analog and digital mixing consoles, broadcast studio equipment, audio test and measurement, high-end A/V receivers
OPA1611 Price (1ku): $ 2.45/ $ 2.20 |
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8-Pin Continuous Conduction Mode (CCM) PFC Controller: The UCC28019 CCM controller is ideal for low-cost PFC applications, producing near unity power factor with little harmonic distortion. It accepts a wide universal input range and is well suited to address power conversion applications from 100W to >2kW.
Resources:
Data sheet
- System level protection features: peak current limit, soft over-current, open-loop detection, brown-out, and simple loop compensation
- Unique fail-safe feature that prevents catastrophic failure if the ground pin and comp pin are shorted
- Applications: AC/DC power converters for consumers electronics (>250W), green mode and 80+ power supplies, motor drivers for air conditioners and refrigeration, industrial or telecom power supplies, white goods
UCC28019 Price (1ku): $ 0.75 |
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2.25-MHz, 92% Efficiency Step-Down Converter: The TPS62750 synchronous step-down DC/DC converter is optimized for USB-powered portable applications, able to provide up to 1300mA average input current. The device supports batteries with extended voltage range of 2.9V to 6.0V.
Resources:
Data sheet
- Operates at 2.25-MHz fixed switching frequency and enters Power Save Mode operation at light load currents to maintain high efficiency over the entire load current range
- Allows use of small inductors and capacitors to achieve a small solution size
- Applications: USB wireless modems, portable USB peripherals, handheld computers
TPS62750 Price (1ku): $ 1.20/ $ 1.35 |
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600-mA, 6-MHz, Vout 1.8-V, 90% Efficiency Step-Down Converter: The TPS6262x synchronous step-down DC/DC converter, optimized for battery-powered portable applications, supports up to 600-mA load current and allows the use of low-cost chip inductor and capacitors. With a wide input voltage range of 2.3V to 5.5V, the device supports applications powered by Li-Ion batteries; different fixed voltage output versions are available from 1.2V to 2.3V.
Resources:
Data sheet
- 6-MHz regulated frequency operation; 90% efficiency at 6MHz
- PFM mode extends battery life by reducing quiescent current to 31µA (typ) during light load and standby operation
- Applications: Cell phones, smartphones, WLAN, GPS, Bluetooth®, DTV tuners, DC/DC micro modules
TPS62621 Price (1ku): $ 0.85 / $ 0.95 |
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5-Channel Power Management IC with 3 DC/DCs, 2 LDOs in 6x6mm QFN: The TPS6507x are single-chip power management ICs for portable applications consisting of a battery charger with power path management for a single Li-Ion or Li-Polymer cell. Three highly efficient 2.25-MHz, step-down converters are targeted at providing the core voltage, memory and I/O voltage in a processor-based system.
Resources:
Data sheet
- Enter a low power mode at light load for maximum efficiency across the widest possible range of load currents
- For low noise applications, can be forced into fixed frequency PWM using I²C interface
- Applications: Portable consumer, industrial and medical; power for OMAP low-power processors
TPS65070 Price (1ku): $ 3.95/ $ 4.35 |
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High-Efficiency PoE Interface and DC/DC Controller: The TPS23757 is a combined Power over Ethernet (PoE) powered device (PD) interface and current-mode DC/DC controller optimized specifically for isolated converters. The device supports a number of input voltage ORing options including highest voltage, external adapter preference, and PoE preference.
Resources:
Data sheet
- PoE interface supports the IEEE 802.3at (draft) standard for a type 1 PD, which is equivalent to the 13W standard of IEEE 802.3-2005
- Provides an additional gate driver output, allowing for easy implementation of high efficiency, isolated flyback topologies using an active clamp rectification
- Applications: IEEE 802.3at Type 1 devices (updated version of 802.3af), IP speaker phones, IP video phones, access points, P/T/Z security cameras
TPS23757 Price (1ku): $ 1.85/ $ 1.65 |
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3-V to 20-V High Current Load Switch: The TPS2590 provides robust circuit protection in space-sensitive applications where the load is powered by voltages between 3.0V and 20V. This device is intended for systems where a voltage bus must be protected to prevent load shorts from interrupting or damaging other system components.
Resources:
Data sheet
- Multiple programmable protection features: load protection is accomplished by a non-current limiting fault threshold, a hard current limit threshhold, and a fault timer
- Dual current thresholds allow the system to draw high current for short periods without causing a voltage droop at the load
- Applications: Hard disk drives, embedded computing, solid-state storage, telecommunications mezzanine cards, battery protection
TPS2590 Price (1ku): $ 1.05/ $ 1.20 |
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0.5-A, 60-V Step-Up DC/DC Converter with Voltage Supervision and Reset: The TPS55332 is a monolithic high-voltage switching regulator with integrated 3-A, 60-V power MOSFET. Once the internal circuits have stabilized, the system can have an input voltage range from 1.5V to 40V to maintain a fixed boost output voltage.
Resources:
Data sheet
- Switching frequency range from 80kHz to 2.2MHz, allowing the use of low-profile inductors and low value input and output capacitors
- Built-in protection features: soft start on enable cycle, pulse-by-pulse current limit, and thermal sensing and shutdown due to excessive power dissipation
TPS55332 Price (1ku): $ 2.85 |
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50-mA, 3-V to 80-V, Micropower, Low-Dropout Linear Regulator: The TPS798xx is designed for low quiescent current (40-µA operating and 1-µA in shutdown) high voltage (80-V) applications. The TPS798xx includes the ability to operate with low equivalent series resistance (ESR) ceramic output capacitors (only 1-µF ceramic capacitor needed).
Resources:
Data sheet
- Internal protection circuitry includes reverse input-battery protection, reverse output current protection, current limiting, and thermal limiting to protect the device in various fault conditions
- Fixed output voltage of 5V (TPS79850); adjustable output voltage with a 1.275-V reference voltage (TPS79801)
- Applications: Applications: Automotive-cluster, infotainment, body modules, apps connected directly to battery line
TPS79801 Price (1ku): $ 1.70 |
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Automotive LIN, MOST ECL, and K-Line Physical Interface: The SN65HVDA195-Q1 is an automotive grade 1-qualified LIN, MOST ECL and ISO9141 (K-Line) physical interface. It is LIN 2.0-compliant, supports MOST ECL speeds down to 0 baud, and is ISO9141 (K-line) compliant.
Resources:
Data Sheet
- Extended supply voltage range from 7V to 27V; the bus pin can handle voltages from -40V to +40V and is ESD protected to ±12KV HBM
- Interfaces directly with either a 3.3-V or 5.0-V microcontroller
- Applications: Automotive apps-infotainment, body controllers, security systems, safety, chassis, power train, engine control, cluster
SN65HVDA195-Q1 Price (1ku): $ 0.65 |
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JEDEC SSTE32882-Compliant 28-Bit to 56-Bit Registered Buffer with Address-Parity Test:The SN74SSQEA32882 28-bit 1:2 or 26-bit 1:2 and 4-bit 1:1 registering clock driver with parity is designed for operation on DDR3-registered DIMMs with VDD of 1.5V and on DDR3L-registered DIMMs with VDD of 1.35V. The device implements different power-saving mechanisms to reduce thermal power dissipation and to support system power-down states.
Resources:
Data sheet,
video
- Integrates PLL and register
- Applications: DDR3-registered DIMMs up to DDR3-1600, DDR3L-registered DIMMs up to DDR3L-1333, single-, dual- and quad-rank RDIMM
SN74SSQEA32882 Price (1ku): $ 6.20
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System Block Diagrams:
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| NEW LITERATURE AND VIDEOS |
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Literature:
SuperSpeed USB Reference Guide: SuperSpeed USB provides a 10x speed increase from 480 Mbps to 5 Gbps. This guide discusses the new technology, issues, features, and applications. |
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Optoelectronics Quick Reference Guide: Discusses the physical media-dependent electronics from TI that provide optical component and system developers with key building blocks such as laser diode drivers, transimpedance amplifiers, post amplifiers and equalizers. |
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Video:
TI’s Fusion Power for the Latest Generation of Xilinx FPGAs eLAB Series - Part 1: Introduces TI’s Fusion digital power technology and discusses how to meet the power requirements for Xilinx Spartan-6 and Virtex-6 families. |
| Energy Harvesting Using Thin Film Thermoelectrics: Demonstration of Micropelt’s thin film Thermoelectric technologies used to harvest energy using TI low-power solutions. |
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| COMPANY-AUTHORED ARTICLES IN THE MEDIA |
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| “Extended battery life in mobile applications using innovative audio headphone amplifiers,” by Nick Holland. MobileHandsetDesignLine.com, June 2009. |
| “Reducing System Noise with Hardware Techniques,” by Bonnie Baker. EDA Forum, June 2009. |
| “Power Tip: #12: Maximize Power Supply Effiency,” by Robert Kollman. PowerManagementDesignLine.com, June 2009. |
| “Power Tip: #13: Don’t Get Burned by Inductor Core Losses,” by Robert Kollman. PowerManagementDesignLine.com, June 2009. |
| “Baker’s Best: Is your amplifier offset way out of whack?,” by Bonnie Baker. EDN, June 2009. |
| “SCB (Part 30): Protocol Selection Over IEEE 802.15.4 Silicon,” by Brian Blum. RFDesignLine.com, June 2009. |
| “Using fully differential op amps as attenuators, Part 2, Single-Ended Bipolar,” by Jim Karki. TI Analog Applications Journal, July 2009. |
| “How the voltage reference affects ADC performance, Part 2,” by Bonnie Baker and Miro Oljaca. TI Analog Applications Journal, July 2009. |
| “Taming linear-regulator inrush currents,” by Jeff Falin. TI Analog Applications Journal, May 2009. |
| “Selecting the right charge management solution,” by Masoud Beheshti. Analog Applications Journal, May 2009. |
| “Designing a linear Li-Ion battery charger with power-path control,” by Charles Mauney. Analog Applications Journal, May 2009. |
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| CUSTOMER SUPPORT CONTACT INFORMATION |
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TI E2E Online Community: Visit TI’s Online 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.
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