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Low capacitance diodes protect automotive data interfaces

Tue, Aug 02, 2022

Robust ESD (electrostatic discharge) protection diodes have been added to Nexperia’s portfolio of low clamping and low capacitance ESD protection diodes. This portfolio is designed to protect high speed data lines such as USB 3.2, HDMI 2.0, LVDS, automotive A/V monitors, displays and cameras. It also aims to address the upcoming high speed video links and the OPEN Alliance MGbit Ethernet applications.

The PESD5V0C1BLS-Q and PESD5V0C1ULS-Q are both two-pin single line devices supplied in compact DFN1006BD-2 packages. This is intended to optimise routing. The other new additions are the PESD5V0C2UM and PESD5V0C2UM-Q which are available as three-pin devices for both differential lines. They are supplied in a DFN1006-3 package which has side wettable flanks to enable automated optical inspection (AOI).

All variants come in leadless packages to improve electrical performance and signal integrity.

ESD voltage clamping diodes protect data interfaces in automotive subsystems but developers have to be careful that they do not degrade data signal integrity or negatively impact the electromagnetic compatibility (EMC) performance of the systems. Nexperia claimed these diodes offer best-in-class signal integrity performance with capacitance as low as 0.3pF.

These AEC-Q101 automotive-qualified devices exhibit deep snapback behaviour combined with a low resistance of 0.27 Ohm, for system level robustness and clamping performance in high speed data interfaces, said Nexperia.

Nexperia produces semiconductors: diodes, bipolar transistors, ESD protection devices, MOSFETs, GaN FETs and analogue and logic ICs.

Headquartered in Nijmegen, the Netherlands, Nexperia meets the stringent standards set by the automotive industry. The company has employees across Asia, Europe and the USA.

Nexperia is a subsidiary of Wingtech Technology and has an extensive IP portfolio and is certified to IATF 16949, ISO 9001, ISO 14001 and ISO 45001.

http://www.nexperia.com

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Farnell stocks BeagleBone AI-64 SBC

Mon, Aug 01, 2022

BeagleBoard.org’s first 64bit open hardware single board computer (SBC) the BeagleBone AI-64 SBC is available from stock from Farnell (in EMEA, Newark in North America and element14 in APAC).

It is designed for building embedded applications and brings a complete artificial intelligence (AI) and machine learning system to developers, said Farnell.

“We believe this board will capture the imaginations of designers and empower them to build complete and powerful AI systems,” said Christine Long, CEO of the BeagleBoard.org Foundation. She continued that it is offered at “an extremely competitive price point, we are excited about the new applications that BeagleBone AI-64 will enable for new and experienced users.”

The BeagleBone AI-64 SBC provides all the on-board peripherals required to start learning and building applications. The BeagleBone cape headers provide expansion possibilities with hundreds of open source hardware examples and dozens of off-the-shelf embedded expansion options. The user needs only to add a simple web browser, power source and network connection, confirmed the company.

The SBC is described as a milestone for BeagleBoard.org by Jason Kridner, president of the BeagleBoard.org Foundation board. “With multiple SuperSpeed USB ports, familiar BeagleBone cape expansion headers and desktop-capable performance, the general purpose embedded applications for this board are endless, with eight TOPS [terra operations per second] neural network performance accessible through familiar Python libraries to boot.”

BeagleBone AI-64 builds on more than a decade of success in open hardware single board Linux computers. It combines the power of the Texas Instruments TDA4VM SoC with dual Arm Cortex-A72 cores, a programmable C7x DSP core and deep learning, vision and multimedia accelerators to offer developers access to fast analytics, data storage options and high speed interfaces. In addition to “a vast amount of computing power”, the SBC includes connectors to create applications such as autonomous robots and drones, smart buildings and factories, home security, retail automation, media servers, machine learning, machine vision and computer vision.

The BeagleBone AI-64 board feature set includes the BeagleBone cape header compatibility with existing add-on boards and ikroBUS Shuttle header, providing access to hundreds of existing Click sensors and actuators. The memory capability is 4Gbyte LPDDR4, 6Gbyte eMMC flash with high speed interface and a MicroSD card. An M.2 E-key PCIe connector interfaces with Wi-Fi / Bluetooth adapters and there is a USB 3.0 Type-C SuperSpeed interface for power input and data and two USB 3.0 Type-A SuperSpeed interfaces and Gigabit Ethernet.

For camera and display options there is a Mini DisplayPort interface, a two or four-lane CSI connector for camera options, and a four-Lane DSI connector for popular display types.

User interfaces include boot, reset and power buttons, a power indication LED and five user LEDs. In addition, there is a 5V DC input power, UART and JTAG 10pin Tag-Connect for debug also included.

In addition to the TDA4VM, there are vision processing accelerators with an image signal processor (ISP) and multiple vision assist accelerators including DMPAC, dual 64-bit Arm Cortex-A72 microprocessors, six Arm Cortex-R5F MCUs at up to 1.0GHz, memory subsystem with up to 8Mbyte of on-chip L3 RAM with ECC and coherency and 12 multi-channel audio serial port modules.

http://www.element14.com

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Pluggable transceiver module provides optical GbE in vehicles

Mon, Aug 01, 2022

KDPOF has developed and validated the first 1000BASE-RH SFP module for optical Gbit connectivity in vehicles. The small form factor pluggable (SFP) transceiver module is based on a standard SFP supporting multi-source agreement registers via I2C bus. The module can operate at 100 and 1,000Mbit per second. It integrates the whole 1000BASE-RHC PHY and the header connector for SI-POF optical harness.

The SFP module has been tested and validated in a functional demo. According to Carlos Pardo, CEO and co-founder of KDPOF, who described it as the first milestone for future commercial optical 1000BASE-RH SFP modules, for integration into the optical ecosystem in automotives.

The SFP supports 1000BASE-X, 100BASE-X, and SGMII (with and without auto-negotiation) as electrical interfaces. It monitors the received optical power, the link margin, the junction temperature, and the supply voltages, among others.

The SFP design has been sampled and validated. KDPOF and Ethernet network testing and visibility tool company, Aukua Systems, are collaborating to optimise the 1000BASE-RHC SFP and make it available in Q3 2022.

Fabless semiconductor supplier KDPOF provides high speed optical networking for harsh environments. Making Gbit communications over fibre optics a reality, KDPOF technology supplies 1Gbit per second POF links for automotive, industrial, and home networks. KDPOF was founded in 2010 in Madrid, Spain, and offers technology as either ASSP or intellectual property (IP) to be integrated in SoCs. The adaptive system works with a range of optoelectronics and low cost large core optical fibres, which provide carmakers low risk, low cost and short time-to-market, claimed the company.

https://www.kdpof.com

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Bluetooth LE module goes where radios aren’t welcome

Thu, Jul 28, 2022

A Bluetooth 5 Low Energy module for applications deemed “radio-unfavourable” has been introduced by Panasonic.

The PAN1770 Bluetooth 5 Low Energy (LE) module includes a uFL connector which enables the use of an external antenna for use where difficult housing conditions shield radio waves.

“We have seen that in many devices or applications, radio waves emitted by the chip antenna can be blocked or reflected by the metallic housing, making it difficult to receive the radio signal from the outside”, commented Tomislav Tipura from Panasonic Industry Europe. Using the PAN1770 module, an external antenna can easily be attached via the uFL connector and thus redirect the radio waves outside the housing, he explained.

The module is based on Nordic Semiconductor’s nRF52840 single chip controller. It joins the PAN1780 Bluetooth 5 module from Panasonic.

Output power is up to 8dBm. The module is suitable for use in applications where a long range is required, due to the sensitivity of 95dBm at 1.0Mbits per second and -103dBm at 125kbits per second via the nRF52840 chip controller combined with the LE coded PHY, said Panasonic. Current consumption is just 4.8mA in Tx (at 0dBm), 4.8mA in Rx mode, 0.4 microA in system off mode and around 0.7 microA with RTC wake-up. These parameters make the module suitable for used in a battery-powered device.

It also includes a Cortex M4F processor, 256kbyte RAM and built-in 1.0Mbyte flash memory. The device can be used in standalone mode, eliminating the need for an external processor, while reducing complexity, lowering costs and saving space, said the company. The PAN1770 module also supports Type 2 near field communication (NFC A) for use in simplified pairing and payment systems, although an external antenna is required.

The module has a small footprint of 15.6 x 8.7 x 1.8mm. Maximum output power is 8dBm, configurable from -20dBm in 4.0dB steps and -40dBm in whisper mode. For 802.15.4 support, it has Matter, Zigbee and Thread, as well as up to 48 programmable general purpose I/Os and SPI, I2C, UART, PWM, ADC, NFC, USB2.0 interfaces.

http://industry.panasonic.eu

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Low capacitance diodes protect automotive data interfaces

Farnell stocks BeagleBone AI-64 SBC

Pluggable transceiver module provides optical GbE in vehicles

Bluetooth LE module goes where radios aren’t welcome

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