Industry’s Lowest Phase Noise Frequency Synthesizer
TI’s new LMX2581 wideband frequency synthesizer with integrated VCO outputs delivers the industry’s best phase noise performance. The LMX2581’s low noise PLL and industry’s highest phase detector frequency outperforms the competition to achieve the flexibility of a wideband frequency synthesizer without compromising system performance.
The highly-integrated LMX2581 combines a ?? fractional-N PLL, a multi-core VCO with tank circuit, optional frequency divider, two differential RF output buffers that can deliver +10 dBm single-ended on each side, and several low-noise, high-precision LDOs to enable lower cost systems in a number of applications, including wireless infrastructure, defense and aerospace, radar, test and measurement, and medical imaging.
The LMX2581 is a low noise wideband frequency synthesizer that integrates a delta-sigma fractional N PLL, multiple core VCO, programmable output divider, and two differential output buffers. The VCO frequency range is from 1880 to 3760 MHz and can be sent directly to the output buffers or divided down by even values from 2 to 38. Each buffer is capable of output power from –3 to +12 dBm at 2700 MHz. Integrated low noise LDOs are used for superior noise immunity and consistent performance.
This synthesizer is a highly programmable device and it enables the user to optimize its performance. In fractional mode, the denominator and the modulator order are programmable and can be configured with dithering as well. The user also has the ability to directly specify a VCO core or entirely bypass the internal VCO. Finally, many convenient features are included such as power down, Fastlock, auto mute, and lock detection. All registers can be programmed through a simple 3 wire interface and a read back feature is also available.
The LMX2581 operates on a single 3.3 V supply and comes in a 32 pin 5.0 mm x 5.0 mm WQFN package.
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Cable Modem Termination System
Source Texas Instruments
|LMX2581 Wideband Frequency Synthesizer with Integrated VCO Datasheet and ordering information|
ADM1270 — High Voltage Input Protection Device
The ADM1270 is a current-limiting controller that provides inrush current limiting and overcurrent protection for modular or battery-powered systems. When circuit boards are inserted into a live backplane, discharged supply bypass capacitors draw large transient currents from the backplane power bus as they charge. These transient currents can cause permanent damage to connector pins, as well as dips on the backplane supply that can reset other boards in the system.
The ADM1270 is designed to control the inrush current, when powering on the system, via an external P-channel field effect transistor (FET).
To protect the system from a reverse polarity input supply, there is a provision made to control an additional external P-channel FET. This feature prevents reverse current flow in case of a reverse polarity connection, which can damage the load or the ADM1270.
|ADM1270 — High Voltage Input Protection Device Datasheet and ordering information|
Texas Instruments LM5175 4-Switch Synchronous Buck-Boost Controller
The LM5175 is a synchronous four-switch buck-boost DC/DC controller capable of regulating the output voltage at, above, or below the input voltage. The LM5175 operates over a wide input voltage range of 3.5 V to 42 V (60 V maximum) to support a variety of applications.
The LM5175 employs current-mode control both in buck and boost modes of operation for superior load and line regulation. The switching frequency is programmed by an external resistor and can be synchronized to an external clock signal.
The device also features a programmable soft-start function and offers protection features including cycle-by-cycle current limiting, input undervoltage lockout (UVLO), output overvoltage protection (OVP), and thermal shutdown. In addition, the LM5175 features selectable Continuous Conduction Mode (CCM) or Discontinuous Conduction Mode (DCM) operation, optional average input or output current limiting, optional spread spectrum to reduce peak EMI, and optional hiccup mode protection in sustained overload conditions.
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Source Texas Instruments
|Texas Instruments LM5175 Controller Datasheet and ordering information|
The new automotive MCUs combine compliance with the most stringent automotive safety standards, encryption for security, and increased memory size for the storage of vital programs and data, strengthening ST’s product line of fault-tolerant microcontrollers for demanding applications throughout the car. These mission-critical applications include engine management, transmission, anti-lock braking, electric power steering, active suspension, and advanced driver assistance systems (ADAS).
“Security and functional safety compliance are essential to realizing cutting-edge high-reliability System-on-Chip ICs for mission-critical automotive applications,” said Fabio Marchio, Group Vice President, General Manager of ST’s Automotive Microcontroller & Infotainment Division. “Offering a simple and compelling upward-migration path from existing parts, our new automotive MCUs enable improved vehicle performance and economy with no compromises in security, while delivering savings in development by promoting hardware and software reuse.”
Part of ST’s Power Architecture™ single-chip 32-bit automotive-MCU family, the SPC58NE product line combines multiple high-performance dual-issue cores with up to 6MB Flash and 768kB internal RAM memory, eight CAN (Controller Area Network) interfaces, and an optimized peripheral set based on the end application. The multiple cores ensure redundancy in these most-important applications to meet the safety and security demands of vehicle manufacturers—and consumers.
The SPC58NE product line is currently available in BGA 292 and LQFP176 package configurations. KGD versions are also planned in the near future. Compliant with the ISO 26262 ASIL-D and EVITA Medium class, the SPC58NE84 is sampling now.
SPC58NE84E7 32-bit Power Architecture MCU for High Performance Applications
SPC58NExx family is the first member of the new SPC58NExx family of 32-bit Flash Automotive MCUs offering a hardware based solution able to answer both ISO26262 ASIL-D compliant and high-performance real-time system requirements for mid/high-end powertrain applications.
|32-bit automotive-MCU family, the SPC58NE product line Datasheet and ordering information|