An ESD and EMI protection app note(PDF) from NXP for SD and MMC memory interfaces. This document gives an overview about different ESD protection and EMI filter devices optimized for SD-memory card and MMC interfaces. These devices cover the range from 1-bit to current standard 4-bit (SD-memory card, SD 2.0) or 8-bit (MMC) high-speed memory […]
Tag Archives: app note
App note: EMI and ESD filtering of audio interconnects
App note(PDF) on NUF2441FC EMI and ESD filter chip from ON Semiconductor. The continued ever-increasing integration of more functions into personal electronic devices such as cell phones has made electronics manufacturers demand more integrated functions to reduce part count and save board space. Cell phone manufacturers have also driven component manufacturers to produce more efficient […]
App note: Analog switches solve many problems within a cell phone
Applications(PDF) of analog switches inside a cell phone by ON Semiconductor. Analog switches have been available since the 60’s as a component for systems designers. With the advent of ASICs and ASSPs, many designers have not experienced the real value of these devices. Today’s designers may be familiar with the venerable MC14066, a workhorse that […]
App note: Does your op amp oscillate?
All about Op Amp stability app note from Linear Technology. Well, it shouldn’t. We analog designers take great pains to make our amplifiers stable when we design them, but there are many situations that cause them to oscillate in the real world. Various types of loads can make them sing. Improperly designed feedback networks can […]
App note: Implementing the suspend indicator using microchip USB hubs
App note(PDF!) on Microchips’ USB hubs suspend indicator feature. The USB251xB / USB3x03 / USB253x / USB3x13 / USB46x6 product lines are a family of feature-rich, low power USB 2.0 hubs optimized for use in embedded systems where high performance and advanced functionality are critical design requirements. The USB251xB / USB3x03 / USB253x / USB3x13 […]
App note: USB device design checklist
Application note(PDF) on the design of various USB controllers from Microchip. The purpose of this application note is to provide a list of items that need to be considered when designing systems that incorporate the following categories of Microchip USB products: -USB 2.0 Hubs -USB 3.0 Hubs -Flash Media Controllers -Flash Media Controller Hub Combo […]
App note: Decoupling solutions
App note (PDF) from KEMET on different decoupling capacitors for each board power line requirements. Integrated circuit (IC) technology has advanced over time, requiring innovative decoupling solutions that address decoupling needs over the entire power path from the main power supply to the logic gates on the IC. As one follows the path from the […]
App note: LED lighting and supercapacitors
An app note (PDF) from KEMET on coupling two high lifetime devices: LEDs and Supercapacitors. Light emitting diodes, or LEDs, have come to prominence in recent years in conventional lighting applications including flash lights, street lamps, traffic lights and emergency lighting. Their advantages over incandescent and compact fluorescent light sources include greater robustness, higher energy […]
App note: Design considerations for single-sided sensing applications of reflective assemblies
App note from TT Electronics on reflective assemblies and the surfaces they need to effectively detect/sense. A reflective sensor provides a major mounting advantage to the designer because only one side of a sensing surface is required. However, there are a number of design variables that need to be considered to assure detection of the […]
App note: Designing encoder elements for two channel optical interrupters
An app note from TT Electronics on design and getting information out of encoder elements of two channel optical interrupters. Rotational direction of a shaft can be readily determined by utilizing the two channels of a dual optical interrupter, an encoder disc with a number of openings around the circumference, and some simple electronics. The […]
App note: Photologic
Photologic components and applications from TT Electronics. Historically, optoelectronic components such as phototransistors have been analog output devices. The application engineer had to design with an output current from the phototransistor generated by a given input bias circuit. The advent of the integrated circuits and microprocessors has required the electronics world to turn digital. The […]
App note: Hall effect liquid level sensing
A hall effect sensor as liquid level sensor app note from TT Electronics.
App note: Magnetoresistive Sensors
Principle of operation of magnetoresistive sensors, app note from Honeywell. Magnetoresistivity is the ability of a material to change resistance under the influence of magnetic fields. There are several different magnetoresistive effects, but Honeywell sensors use the Anisotropic Magneto Resistive (AMR) effect which occurs in ferrous materials, including Permalloy. Permalloy is an alloy of nickel […]
App note: Hall effect sensing and application
Hall effect sensing introduction app note from Honeywell. The Hall effect has been known for over one hundred years, but has only been put to noticeable use in the last three decades. The first practical application (outside of laboratory experiments) was in the 1950s as a microwave power sensor. With the mass production of semiconductors, […]
App note: Minimizing the temperature dependence of digital potentiometers (POTs)
An app note from ON Semiconductors. The digital POT has two temperature dependent parameters, the TC of the end-to-end resistance RPOT and the ratiometric TC. The temperature dependence of the parameters of an analog circuit using a digital POT is reduced if the performance of the circuit is shifted from the TC of the end-to-end […]
App note: An introduction to LDO early warning function
Supervisory reset delay prevents premature power fail resets, App note from ON Semiconductor. In today’s world of high speed, high power processors, new demands have been placed on the power source regulator. One example is the need to inform the processor in advance of an impending drop in supply voltage below a critical value. A […]
App note: Using the enable Pin in a linear regulator as a voltage supervisor
Clever way using linear regulator’s enable pin implementing a voltage supervisory circuit control, an app note(PDF) from ON Semiconductors. The combination of a voltage regulator and a voltage supervisor, is a popular circuit configuration. The addition of the supervisor ensures that the regulated output turns on and off at sufficient input voltages, as well as […]
App note: using MOSFETs in load switch applications
App note(PDF) from ON Semiconductor. The load switch is controlled by the system, and connects or disconnects a voltage rail to a specific load. By turning unused circuitry off, the system as a whole can run more efficiently. The load switch provides a simple means to power a load when it is in demand and […]
App note: LED array drivers
Here are STMicroelectronics’ portfolio of LED array drivers(PDF). The use of LEDs in applications like displays, information and advertising panels, signs, traffic signals, automotive lighting and architectural lighting is becoming more and more common. LED array drivers, with accurate constant current regulation and embedded serial interfaces, offers a solution that is suitable for most of […]
App note: Using the STM6600, STM6601 smart push-button on/off controller
An app note(PDF) on smart on/off controller and voltage monitoring chip from STMicroelectronics. These devices allow easy and safe control of applications run with one or two push-buttons by securely starting or powering down a system and also resetting the processor or disabling power in case of a non-responding application (e.g. code in a dead […]