App note on Murata’s Digital panel volt meters analog common and reference pins. Link here (PDF) Perhaps the least understood I/O pin on all DMS Series DPM’s is ANALOG COMMON. The confusion surrounding this pin is not unjustified since it should be left open, i.e., have no external connections, in the vast majority of normal […]
Tag Archives: app note
App note: Voltage proof test for metalized film capacitors
App note from Vishay about self recovery of metalized film caps. Link here (PDF) Voltage proof tests, also called “high pot” tests, are used to check if a capacitor has a breakdown failure mode occurring at a certain test voltage. The detection of breakdown is done by a current detection, specified if exceeding a certain […]
App note: Secure Key Storage
App note from Silicon Labs on their EFR32 device secure features Key encryption. Link here (PDF) Secure Key Storage is a feature in Secure Vault-enabled Series 2 devices that allows for the protection of cryptographic keys by key wrapping. User keys are encrypted by the device’s root key for non-volatile storage for later usage. This […]
App note: Input for magnetometer placement simulations
App note from Kionix on things to look for and placement evaluation before placing magnetometer on PCBs. Link here (PDF) Simulations of the magnetic field environment to provide magnetometer part placement recommendations need considerable technical information to assist the process. Magneto-static and magnetic noise information of the materials and magnetic field sources need to be […]
App note: Handheld electronic compass applications using a Kionix MEMS Tri-Axis accelerometer
App note from Kionix on the how to’s of handheld compass, diving into Earth’s magnetic basics, plots and equations. Link here (PDF) Today’s world is about mobility. The expanded and growing availability of cell phones, PDA’s and GPS has resulted in a massive integration of features into handheld devices. Growing in popularity, the integrated electronic […]
App note: How to filter the input of a high-side current sensing
App note from STMicroelectronics on high-side current sense RF noise filtering. Link here (PDF) In an application such as a power supply or a DC-DC converter, the voltage output is generally noisy. Some spikes load the current. Alternatively, a temporary over voltage might occur creating either common mode or differential noise. Such high frequency signals […]
App note: New family of 150V power schottky
App note from STMircoelectronics on the advantage of power schottky over bipolar diode in SMPS. Link here (PDF) Nowadays, the Switch Mode Power Supply (SMPS) is becoming more widespread as a result of computer, telecom and consumer applications. The constant increase in services (more peripherals) and performance, which offers us these applications, tends to move […]
App note: Generating negative output voltage from positive input voltage using MAX17291 boost converter IC with active discharge feature
App note from Maxim Integrated about their MAX17291 generating negative voltage from positive input. Link here Many applications require the power supply to provide a negative voltage, such as LCD displays, gate drivers, embedded applications, op-amp circuits, etc,. This application note explains how to generate a negative output voltage from a positive input voltage using […]
App note: External programmable current limit for MAX38902 LDO
App note from Maxim Integrated about adding additional current limiting circuit for their MAX38902 LDO. Link here Current limit in a LDO establishes an upper threshold for the current delivered. In a low dropout linear regulator architecture, the input and output average currents, which are connected by a series pass-through transistor, are almost the same. […]
App note: How to measure the efficiency of a multiphase buck converter integrated circuit
Tips from Maxim Integrated on how to measure efficiency on complicated multiphase converters. Link here Due to the nature of multiphase buck converters, perceived efficiency varies for a static operating condition depending on the load and output voltage measurement connections, as well as the symmetry of the PCB layout. An engineer evaluating multiphase buck converters […]
App note: How to save power in high-precision measurements
App note from Maxim Integrated on achieving a lower power sensing in analog front end. Link here In precision signal conditioning and measurement applications, a delta-sigma ADC has often been preferred over a SAR ADC on account of high-resolution output and highly integrated internal blocks such as a PGA or GPIO voltage reference. However, in […]
App note: Flash analysis techniques and best practices
App note from Infineon on the basics of flash memories and their failure analysis recommendations. Link here (PDF) Nonvolatile memory devices (like Flash) are often used in embedded applications that rely on the storage of system configuration, dynamic data, or both. This data needs to be retained during a power interrupt or power cycle. In […]
App note: Designing with cypress quad SPI (QSPI) F-RAM™
App note from Infineon about quad SPI, an enhanced SPI protocol that provides four times data throughput at higher frequencies. Link here (PDF) In order to manage the wide range of multimedia, graphics, and other data intensive content, embedded systems have evolved to offer more sophisticated features. These features place extra demands on the often-limited […]
App note: Solid electrolytic capacitors designed for high temperature applications
New development and manufacturing process produces extended temperature endurance of solid capacitors discuss in this app note from KEMET. Link here (PDF) For decades the maximum recommended operating temperature of solid electrolytic capacitors was 125°C. Responding to needs in the automotive and downhole drilling industries passive component manufacturers developed surface mount tantalum capacitors rated at […]
App note: Supercapacitor leakage current and self discharge characteristics
App note from KEMET about supercapacitor’s leakage and self discharge and their differences in order to take account the back-up time of an application. Link here (PDF) Supercapacitor is widely used for RTC backup application to provide power to RTC circuit in electronics when the power source to the system is disconnected. Self-discharge characteristics is […]
App note: Pulse load handling for fixed linear resistors
Technical note from Vishay about linear resistor handling pulsed currents. Link here (PDF) The power and thermal behavior of fixed linear resistors are mostly based on DC or RMS loads, but pulse loads, like single energy pulse or a continuous flow of pulses, become more and more an important factor in professional electronics.
App note: Using the Si72xx hall-effect magnetic position sensors
App note from Silicon Labs on their hall-effect Si72xx magnetic sensor to sense position, count revolution and security system seal tamper sensing. Link here (PDF) These devices all measure magnetic field in the axis perpendicular to the package. All of these parts share the attributes of low power, high sensitivity, and low noise. The simplest […]
App note: Performance of LC823455 echo canceller
App note from ON Semiconductors about LC823455 audio processor echo cancelling test results. Link here (PDF) The canceller enables customers to improve the sound quality of hands free communication in wireless headset or other voice communication products.
App note: Performance of LC823455 noise canceller
App note from ON Semiconductors on their LC823455 audio processor noise cancelling test results. Link here (PDF) The canceller enables customers to improve audio characteristics for products such as Wireless headsets, Wireless speakers or Voice recorders.
App note: PN7150 hardware design guide
A hardware design guide using NXP’s PN7150 full featured NFC controller. Link here (PDF) This document is intended to provide an overview on how to integrate the NFC Controller PN7150 from hardware perspective. It presents the different hardware design options offered by the IC and provides guidelines on how to select the most appropriate ones […]