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Audio Line Driver using DRV135 with Balanced Output

The project presented here is a differential output amplifier that converts a single-ended audio signal input to a balanced output pair. This balanced audio project consists of high-performance OPAMPS with on-chip precision resistors. They are fully specified for high-performance audio applications and have excellent AC specifications, including low distortion (0.0005% at 1 kHz) and high slew rate (15 V/µs). The board is based on DRV135 from Texas Instruments.

The on-chip resistors are laser-trimmed for accurate gain and optimum output common-mode rejection. Wide output voltage swing and high output drive capability allow use in a wide variety of demanding applications. They easily drive the large capacitive loads associated with long audio cables.

This project is used in combination with the Audio Line Receiver using INA134 as the receiver. Together they offer a complete solution for transmitting analog audio signals without degradation over a long distance.

Features

  • Single-Ended Audio Input and Balanced Output
  • Low Distortion: 0.0005% at f = 1 kHz
  • Wide Output Swing: 17Vrms into 600 Ω
  • High Capacitive Load Drive
  • High Slew Rate: 15 V/µs
  • Wide Supply Range: ±4.5 V to ±18 V @ 15mA without Load
  • Low Quiescent Current: ±5.2 mA
  • Companion to Audio Differential Line Receivers: INA134
  • Improved Replacement for SSM2142
  • PCB Dimensions 48.26 x 36.20 mm

Applications

  • Audio Differential Line Drivers
  • Audio Mix Consoles
  • Distribution Amplifier
  • Digital Effects Processors
  • Hi-Fi Equipment’s

Schematic

Parts List

NO.QNTY.REF.DESC.MANUFACTURINGSUPPLIERPART NO
11CN13 PIN SCREW TERMINAL PITCH 5.08MMPHOENIXDIGIKEY277-1248-ND
21CN23 PIN SCREW TERMINAL PITCH 5.08MMPHOENIXDIGIKEY277-1248-ND
31CN36 PIN MALE HEADER PITCH 2.54MMWURTHDIGIKEY732-5319-ND
42C1,C447uF/25VKEMETDIGIKEY399-18446-1-ND
52C2,C50.1uF SMD SIZE 0805MURATA/YAGEODIGIKEY
63C3,C7,C1010uF/50V NON-POLARNICHICONDIGIKEY493-10835-1-ND
73C6,C8,C9470PF/50V SMD SIZE 0805MURATA/YAGEODIGIKEY
84D1,D2,D3,D41N4007 SMD SMC DIODE SOLUTIONDIGIKEY1655-1N4007FLCT-ND
91D5LED SMD SIZE 0805LITE ON INCDIGIKEY160-1427-1-ND
101R11.5K 5% SMD SIZE 0805MURATA/YAGEODIGIKEY
111U1DRV135 SOIC8TIDIGIKEYDRV135UA-ND

Connections

Application Diagram

Transmitter/Receiver Diagram

Gerber View

Photos

Video

DRV135 Datasheet

PCBWay added more solder mask colors and includes a new transparent design

Posted on by Abhishek Jadhav

Some of the well-known PCB layout design software are Eagle Software, Altium Designer 22 and KiCAD. However, Altium Designer 22 remains a market leader despite its expensive full-suite license. For embedded electronic manufacturers inclined towards adopting open-source technologies, choose KiCAD as a PCB design tool that recently announced the release of KiCAD version 6.0.0 that incorporates a new interface and improved PCB design experience. Even hardware enthusiasts and project designers are willing to use KiCAD over other PCB design tools and all this boils down to fabrication and assembly of the designed PCB. One of the top choices is PCBWay as it offers a large number of benefits such as customization and bulk discounts.

Today, we will be understanding why PCBWay recently added more customization options for PCB makers. On September 13, 2021, the PCBWay team released a blog post titled, “PCBWay New Solder Mask Colors – Pink, Gray, Orange and Transparent” suggesting the addition of new solder mask colors– understanding the client’s demand as they as “we listened and learned”. Before this announcement, the team has already added some new colors like matte black, matte green and purple, however, as the company quotes, “that doesn’t seem to satisfy everyone” so here comes more solder mask colors to include pink, orange, gray and transparent to the existing list of popular green, red, yellow, blue, white, and black. Interestingly, PCBWay provides these customization options only for the Advanced PCB option and is not included in the Standard PCB specification selection.

PCBWay Color Customization Options

As we look deeper into what makes a solder mask so important as part of PCB fabrication and does a different color solder mask aid your performance or heat dissipation. In simple terms, a solder mask is a material that covers an area on the PCB where insulation is required that is usually applied to the copper traces for protection against oxidation and to prevent solder bridges from closely spaced solder pads. In intricate soldering design, closely spaced solder pads can incur errors short-circuiting the entire design and requires a gap where the solder does not stay and an unintentional electrical connection between two conductors does not take place. The most commonly used solder mask is green in color, but as mentioned earlier, there are several new options arising. To manufacture these solder masks, there are various materials with which the cost of PCB design fluctuates, with epoxy liquid being the lowest-cost solder mask. Other types are liquid photoimageable solder mask inks and dry film photoimageable solder masks. However, as the evolution of PCB substrate material takes place, FR-4, named fiberglass-reinforced epoxy-laminated sheets, has become a widely popular choice among electrical engineers and designers.

Analysis

All this is good, but does the color make any difference to the performance of circuit boards? Well, technically, NO, but it depends on the designers who want different color customizations for their PCBs. The most common answer would be, ‘they want to try different colored PCB manufacturing for custom applications, and avoid traditional Green PCB’. Whatever may be the reason, “clients” as mentioned by PCBWay, are looking for more color options than the existing long list.  So if you want your PCB to look fancier than ever before and make it stand out, then you can try the PCBWay new solder mask and silkscreen colors from the Advanced PCB page.

In the announcement, PCBWay also added a new black core PCB material, which is a Black FR-4 and will cost extra after the order is reviewed.

For more details, head to the official blog post. If you are interested in customization of your PCB design, look for Advanced PCB specifications.

AAEON Announces BOXER-8260AI and BOXER-8261 AI@Edge Embedded BOX PCs Powered by NVIDIA Jetson AGX Orin System on Modules

Posted on by mixos

With the announcement of the NVIDIA® Jetson AGX Orin™ developer kit, AAEON is excited to utilize the many benefits that such a powerful system-on-module (SOM) can bring to its own product lines. With the same form factor and pin compatibility as the NVIDIA Jetson AGX Xavier™, but with an improvement from 32 TOPS to 275 TOPS, the NVIDIA Jetson AGX Orin is set to make it easier than ever to develop faster, more sophisticated AI applications.

AAEON is therefore pleased to announce two upcoming products available in Q4 which will feature the Jetson AGX Orin 32GB and Jetson AGX Orin 64GB as their respective processor modules: the BOXER-8260AI and BOXER-8261 AI@Edge Embedded BOX PCs. Both products will feature the NVIDIA JetPack™ 5.0 SDK to support the full Jetson software stack to help in the development of AI applications in areas such as high-end autonomous machinery.

With two NVIDIA deep learning accelerators (NVDLA), along with a 32GB 256-bit system memory, the BOXER-8260AI will provide the perfect device for vision-based AI applications. Moreover, its expansive I/O options include 12 RJ-45 slots for PoE, along with DB-9 slots for CANbus and six DIO.

The BOXER-8261AI is equipped with 64 GB 256-bit system memory and 64 GB eMMC storage. The BOXER-8261AI also offers 2 Giga LAN RJ45 ports, alongside 5 USB slots and a micro-SD card slot for additional storage. The AI performance capabilities of the Jetson AGX Orin, based on the NVIDIA Ampere GPU architecture, are 8x that of the Jetson AGX Xavier, giving users unprecedented access to more powerful and efficient AI inferencing capabilities, along with increased processing speed. Further boosting the Jetson AGX Orin is the architecture’s up to 2,048 CUDA cores and 64 third-generation Tensor Cores, in comparison to its predecessor’s Volta architecture, which had 512 CUDA and 64 Tensor Cores.

In addition, the Jetson AGX Orin developer kit’s 12-core Arm Cortex-A78AE v8.2 64-bit CPU shows significant improvements over the previous model, with an increase from eight Carmel cores to 12 A78 cores for a more powerful processing unit.

As is already apparent from the BOXER-8260AI and BOXER-8261’s potential applications, AAEON customers will benefit tremendously from NVIDIA’s innovation, with AAEON’s ODM and OEM expertise utilizing the adroitness of the Jetson AGX Orin in facilitating AI application deployment. The combination of the Jetson AGX Orin SOM’s sophisticated GPU, its integrated AI software, and deep learning accelerators will ensure AAEON customers have access to the most powerful computing options when it comes to realizing their AI edge concepts.

A further benefit to AAEON customers is that the Jetson AGX Orin developer kit features the same 699-pin form factor module as previous modules, ensuring compatibility with AAEON carrier boards loaded with existing NVIDIA modules of the same configuration, allowing for smooth migration to power existing AI edge applications.

For more information about the NVIDIA® Jetson AGX Orin™ developer kit, please follow visit their product page: https://www.nvidia.com/en-us/autonomous-machines/embedded-systems/jetson-orin/

Autonomous USB Type-C Power Delivery for sink applications

Posted on by mixos

ROHM’s USB Type-C power delivery provides for quick and easy design and implementation of USB Type-C PD for sink applications (UFP)

ROHM’s ICs are members of their proven full-featured USB Type-C power delivery (PD) controller portfolio. They allow quick and easy design and implementation of USB Type-C PD for sink applications (UFP). Supporting the full suite of UFP features, they are verified as compliant and do not need an external MCU. They handle all functions required by UFP, including dead battery, plug-in, and detach detection. The devices provide control of the required power path NMOS FETs which provide power isolation and reverse current protection. The voltage range and sink power settings are selectable by GPIOs.

Features

  • 32Bit ARM® Cortex®-M0 Processor Embedded
  • USB Type-C Specification Ver.1.3 Compatible
  • USB PD Specification Ver.3.0 Compatible
  • Integrated VBUS N-ch MOSFET Switch Gate Driver
  • Integrated VBUS Discharge Switch
  • Protection Voltage of CC Pins is 28V
  • Supports Dead Battery operation
  • I²C Interface for Host Communication

Applications

  • Any electronic product that requires USB Type-C PD charging as a power sink
  • Smart/portable speakers
  • Drones
  • External storage

more information: https://www.rohm.com/products/interface/usb-type-c-power-delivery/controller/bd93f10mwv-product

Rohde & Schwarz at DesignCon 2022 presents latest innovations for high-speed digital applications

Posted on by mixos

At DesignCon 2022, Rohde & Schwarz will showcase live demos covering industry trends in cooperation with industry experts such as Samtec, ataitec, Clear Signal Solutions, and more.

At DesignCon Rohde & Schwarz is demonstrating a mix of unique solutions for high-speed digital applications. High-speed digital interfaces are at the core of all electronic designs. Increasing data rates and growing integration density create new challenges for designs at the IC, board and system level. At the Rohde & Schwarz booth, demos like MGBase-T1 Compliance, USB 3.2 Compliance, and an enhanced PCIe Trigger/Decode demo will be available for show attendees to experience.

As one of the highlights, Rohde & Schwarz will demonstrate the R&S ZNA high-end vector network analyzer (VNA) which features models up to 67 GHz. This extends the VNA’s industry leading performance and unique hardware architecture to high frequency applications. The R&S ZNA will showcase a live demonstration including 112 Gbps PAM4 Channel Analysis and PCIe Gen 6 Channel Analysis. In another highlight demo, the R&S ZNBT40 vector network analyzer covering up to 40 GHz will demonstrate the test of a 400GBASE-CR4 cable assembly according to IEEE 802.3ck with the R&S ZNrun Ethernet Compliance Automation tool. In addition, the R&S RTO6 Oscilloscope will showcase a live demonstration of power integrity measurements of PDN impedance.

Rohde & Schwarz will be exhibiting at DesignCon in booth 1049 at Santa Clara Convention Center on April 5-7, 2022. Open to all attendees on April 6, Rohde & Schwarz is sponsoring a day of complimentary technical seminars by both Rohde & Schwarz product experts and other industry experts from ataitec and Clear Signal Solutions. Beginning at 8 a.m. in the Great America Meeting Room 2, the technical seminars will cover topics such as power integrity measurement fundamentals, Automotive Ethernet, and more. For those who are unable to attend DesignCon 2022, all technical seminars will be available online following DesignCon.

For more information on where to find the technical seminars, and live updates from DesignCon 2022, follow Rohde & Schwarz solutions for Electric Design on LinkedIn .

1200V High-Current Half-Bridge using FAN73912

Posted on by mixos

The project presented here is designed for high-voltage and high-speed driving for MOSFETS and IGBTs that operate up to +1200V. The project consists of a FAN73912 gate driver chip and 2 x IGBTs, DC bus capacitors, current sense resistor for current feedback etc. The advanced input filter of HIN provides protection against short-pulsed input signals caused by noise. An advanced level-shift circuit offers high-side gate driver operation up to VS=-9.8 V (typical) for VBS=15 V. The UVLO circuit prevents malfunction when VCC and VBS are lower than the specified threshold voltage. R8 is the current sense resistor.

1200V High-Current Half-Bridge using FAN73912 – [Link]

High Current Half-Bridge with Over Current & Voltage Feedback for Step Down DC-DC Converter

Posted on by mixos

This project enables the user to create a high current DC-DC converter. The project consists of a high current inductor, high current low voltage 2 x MOSFETs, half-bridge driver LT1158 chip, voltage feedback using onboard R9 and R10 resistor dividers, shunt resistor for overcurrent shut-down. The project has all the required components to create a high current step-down DC-DC converter, refer to the datasheet of LT1158 chip for components selection. The Half-bridge requires a PWM input signal, Arduino or another microcontroller/DSP can be used as a host to generate PWM signal and control enable and fault conditions.

High Current Half-Bridge with Over Current & Voltage Feedback for Step Down DC-DC Converter – [Link]

Panasonic AQY4C PhotoMOS PCB Mount Solid State Relays

Posted on by mixos

Panasonic AQY4C PhotoMOS PCB Mount Solid State Relays are CC-type, normally closed, ultra-miniature, TSON packaged (1.95mm x 1.80mm x 0.8mm) relays using capacitive isolation technology. These relays are approximately 88% smaller than the previous SOP-packaged devices, offering a 3.5mm2 mounting area. Low current consumption and a 0.2mA maximum input current contribute to energy savings and increases drivability. The Panasonic AQY4C PhotoMOS PCB Mount Solid State Relays are voltage driving type components with a 3V to 5V input voltage range. Performance is guaranteed at temperatures up to +105°C. Applications include measuring equipment, security equipment, and voltage operating equipment that requires low electricity consumption.

Features

  • Ultra-miniature TSON package contributes to space savings and high-density mounting
  • Guaranteed performance at high temperature (+105°C maximum)
  • Low current consumption, 0.2mA maximum input current
  • Voltage driving type (3V to 5V)
  • RoHS compliant

Applications

  • Measuring equipment
    • IC testers
    • Probe cards
    • Board testers
    • Other testing equipment
  • Security equipment
    • Security cameras
    • Intruder detection
  • Electric/gas meters and other meters
  • Disaster-preventing equipment
    • Fire alarms
    • Smoke/heat/fire detectors
  • Industrial equipment
    • Electric measuring equipment
    • Industrial measuring equipment
  • Telecommunications equipment
  • Wearable devices

Specifications

  • Input
    • 5.5V input voltage
    • 0.2V input reverse voltage
    • 1.2mW power dissipation
    • 1.6V typical operate (OFF) voltage, 2.5V maximum
    • 0.5V minimum reverse (ON) voltage, 1.4V typical
    • 0.04mA to 0.09mA typical input current, 0.1mA to 0.2mA maximum
  • 250mW total power dissipation
  • 200VRMS I/O isolation voltage
  • Ambient temperature ranges
    • -40°C to +105°C operating
    • -40°C to +125°C storage
  • Output
    • 60VAC peak load voltage
    • 0.15A continuous load current
    • 0.4A peak load current
    • 250mW power dissipation
    • 4Ω typical on resistance, 8Ω maximum
    • 10nA maximum off-state leakage current
  • Transfer characteristics
    • 0.06ms to 0.11ms typical operate (OFF) time, 0.5ms to 1.0ms maximum
    • 0.3ms to 0.5ms typical reverse (ON) time, 1.5ms maximum
    • 1.2pF typical I/O capacitance, 3pF maximum

more information: https://na.industrial.panasonic.com/products/relays-contactors/semiconductor-relays/lineup/photomos-relays/series/12922

Texas Instruments TPS258x-Q1 Integrated USB Charging Port Solution

Posted on by mixos

Texas Instruments TPS258x-Q1 Integrated USB Charging Port Solution integrates a monolithic, synchronous, rectified, step-down, switch-mode converter with internal power MOSFETs. It also includes two USB current-limit switches with charging port auto-detection. The TPS2585x-Q1 offers a compact solution that achieves 6.6A of continuous output current with excellent load and line regulation over a wide input supply range. The synchronous buck regulator operates with peak-current mode control and is internally compensated to simplify the design. A resistor on the FREQ pin sets the switching frequency between 200kHz and 3MHz. Operating below 400kHz results in better system efficiency, and operation above 2.1MHz avoids the AM radio bands and allows for use of a smaller inductor.

The Texas Instruments TPS2585x-Q1 integrates standard USB Type-C port controller functionality that includes Configuration Channel (CC) logic for 3A and 1.5A current advertisement. Battery Charging (Rev. 1.2) integration provides the required electrical signatures necessary for non-Type-C, legacy USB devices that use USB data line signaling to determine USB port current sourcing capabilities. The TPS2585x-Q1 also has integrated VCONN power that can meet the USB3.1 power requirement. The part is especially suitable for dual-port applications due to the high system integration and small footprint.

The TPS2585x-Q1 provides various safety features for USB charging and system operations. These include external negative thermistor monitoring, cycle-by-cycle current limit, hiccup short-circuit protection, undervoltage lockout, BUS overcurrent, OUT overcurrent, and die overtemperature protection. The device family is available in a 25-pin, 3.5mm x 4.5mm QFN package.

Features

  • AEC-Q100 qualified for automotive applications
    • –40°C to +125°C TA temperature grade 1
    • HBM ESD classification level H2
    • CDM ESD classification level C5
  • Synchronous buck regulator
    • High efficiency at 2.1MHz: 93.4% at VIN = 13.5V, IPA_BUS = 3A and IPB_BUS = 3A
    • 18mΩ/10mΩ Low RDS(ON) buck regulator MOSFETs
    • 5.5V to 26V, withstand 36V input operating voltage range
    • 200kHz to 3MHz adjustable frequency
    • FPWM with spread-spectrum dithering
    • Selectable output voltage (5.1V, 5.17V, 5.3V, 5.4V)
  • Internal power path
    • 7mΩ/7mΩ Low RDS(ON) internal USB power MOSFETs
    • ±10% at 3.4A programmable current limit for USB ports with high accuracy:
    • OUT: 5.1V, 200mA supply for auxiliary loads
  • 90mV at 2.4A load line drop compensation
  • Compliant to USB-IF standards
    • Type-C rev 1.3
      • 3A capability advertisement on CC
      • VBUS application and discharge
      • 200mA VCONN source
    • Automatic DCP modes (TPS25850-Q1)
      • Shorted mode per BC1.2 and YD/T 1591 2009
      • 1.2V Mode
      • 2.7V Divider 3 mode
  • Load shedding versus programmable TA
  • –40°C to +150°C device TJ range

Simplified Schematic

more information: https://www.ti.com/product/TPS25850-Q1

SB Component Ltd Unveils UHF HAT for Raspberry Pi with a 1.14-inch LCD Display

Posted on by Abhishek Jadhav

UHF HAT for Raspberry Pi

This isn’t the first time UK-based embedded electronic design and manufacturer, SB Components Ltd has released an RFID HAT for Raspberry Pi. The electronic device supplier has launched a crowdfunding campaign on Kickstarter with a goal of £10,000 for its newly designed 40-pin ultra-high frequency (UHF) HAT for Raspberry Pi. Even though the goal has already been met through 26-backers for the open-source project with various pledging options of £225 for the UHF HAT for Pi and £950 for a pack of 5, unfortunately, the early bird discount is over which was priced at £199 for a single piece.

Before jumping onto UHF HAT for Raspberry Pi, which integrates a compact RFID reader with low-power consumption capabilities, let us take a look at the stand-alone RFID HAT for Raspberry Pi by SB Components Ltd. On September 18, 2020, the team at SB Components released a blog post on its official website titled, “Introduction of RFID HAT for Raspberry Pi” with a special highlight for its in-house RFID module operating at a frequency of 125KHz, priced at just £24.99. The RFID HAT gets a programmable 0.91-inch OLED display that is compatible with all the Raspberry Pi versions and uses UART communication for interfaces. With a standard 40-pin Raspberry Pi GPIO extension header, the HAT is ready to fit on top of the Raspberry Pi single-board computer through the headers.

UHF HAT Module for Raspberry Pi

Taking all these capabilities from the original RFID HAT and upgrading them to design the ultra-high frequency HAT for Raspberry Pi that operates in the frequency range of 865MHz to 870MHz and 915MHz to 928MHz along with an onboard antenna. The Raspberry Pi UHF HAT gets JADAK’s smallest embedded module with ultra-low power consumption and a tiny form factor– ThingMagic M6E Nano UHF RFID reader, ideal for battery-operated applications. The module supports UART serial communication as an interface type and operates on a 3V3 to 5.25V power supply. Also, the HAT is capable of reading the RFID tags at a rate of up to 200 tags per second through adjusting the RF output range of 0dBm to +27dBm with an increment of 0.01dB. Other upgrades include a larger 1.14-inch LCD display and a USB Type-C port for power.

Analysis

As an open-source project, the UHF HAT looks interesting for several use cases such as inventory management, tracking products in the cart, smart billing system, advanced library system, and attendance system to name a few. However, note that for a faster prototype of RFID-based applications, the UHF HAT for Raspberry Pi seems to be extremely expensive in comparison to the original RFID HAT. Despite the higher price points, 26 community enthusiasts have made the product successful on the crowdfunding website. If you are interested in pledging to get your hands on UHF HAT, head to the Kickstarter product page with an expected delivery of April 2022.

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