App note from STMicroelectronics about comparators and their limitations, also info on substitution depending on the application. Link here (PDF) After operational amplifiers (op amps), comparators are the most generally used analog, simple integrated circuits. Operational amplifiers are well described in many publications and a lot of information can be found regarding the design and […]
Tag Archives: app note
App note: Power inductors 101
App note from Vishay about how modern power inductors are made and their performance. Link here (PDF) Power inductors are typically used for energy storage in DC/DC converters or high current noise filter applications, including motor speed control, adjustable lighting, DC power conditioning, and more. Power inductors can be divided further into two groups – […]
App note: Inductors as RF chokes
App note from Coilcraft on how inductors where used for solving RF isolation issues. Link here (PDF) Many consumer products communicate with each other over broadband networks. From television to fiber transmission networks, the bandwidth of data communication is increasing, and the integrity of RF signals has become a major design concern. This paper provides […]
App note: Measuring self resonant frequency
App note from Coilcraft on determining the self resonant of an inductor and how to compare them to other identical inductors. Link here (PDF) When comparing published electrical values, engineers require a common basis for comparison. Ideally, a 100 nH inductor with a self resonant frequency (SRF) of 1 GHz from one manufacturer is equivalent […]
App note: Utilizing the power shutdown capabilities of the Kionix tri-axis accelerometers
Conserve power on using accelerometers with the help of this app note from Kionix by shutting it down on specific operating duty cycle. Link here (PDF) Kionix tri-axis accelerometers feature a power shutdown capability. Even with their typically low current draw, there are still applications that may require even less power consumption. For these applications, […]
App note: Multiplexing Tri-Axis accelerometer outputs
App note from Kionix on reading multiple accelerometer by a single ADC using off the shelf chip or accelerometer built-in multiplexer. Link here (PDF) A Kionix tri-axis accelerometer with analog outputs provides three output voltages (Xout,Yout, Zout) which are proportional to the respective accelerations in those directions. However, with three analog outputs to digitize, it […]
App note: Low-Power Real-Time algorithm for metering applications
Tested algorithm library from NXP Semiconductors on power metering. Link here (PDF) High accuracy metering is an essential feature of an electronic power meter application because inaccurate metering can result in substantial amounts of lost revenue. Moreover, inaccurate metering can also undesirably result in overcharging to customers. The common sources of metering inaccuracies, or error […]
App note: Loudspeaker characterization and compensation
Using DSP and ST’s Tune software to compensate for a flatter response on speakers discussed in this app note from ST Microelectronics. Link here (PDF) The application note describes how to measure and analyze the performance of a loudspeaker and how to compensate the frequency response using the ST Speaker Tune software, a tool available […]
App note: Pre-amplifying the analog output of a MEMS microphone
Designing pre-amp for MEMS microphone found in this app note from ST Microelectronics. Link here (PDF) This application notes describes the key parameters related to pre-amplification of the output signal of an analog MEMS microphone (MP23AB02B). A solution is proposed based on the TS971 op amp. For a differential output configuration, we can consider using […]
App note: The importance of compensation capacitors on the eFuse power line
Inductive spike on voltage rails causes eFuse to shutdown, here’s an app note from ON Semiconductors on how they solve this problem from happening. Link here (PDF) ON Semiconductor produces a wide variety of silicon based protection products including current limiting devices such as Electronic Fuses (eFuses). During an over−current stress, eFuses can limit the […]
App note: eFuse reverse voltage protection
App note from ON Semiconductors about eFuses’ ability to block reverse voltage. Link here (PDF) One area in which they (eFuses) differ in performance is reverse polarity protection. While a TVS device and polyfuse will protect against reverse voltages, the nature of an integrated semiconductor device does not inherently allow for this type of protection. […]
App note: Implementation of error code correction in EEPROMs
App note from ON Semiconductors about their EEPROM error correction. Link here (PDF) Some of ON’s automotive EEPROMs, like the Grade 0 NV25xxx family (SPI, 1 – 64 Kb) and the Grade 1 CAV24Cxx / CAV25xxx (Grade 1, 128 Kb and higher) implement an Error Code Correction scheme. What this means is that for each […]
App note: Revolutionizing analog to digital conversion
App note from ON Semiconductors introducing their nano power ADC NCD9801x. Link here (PDF) The NCD9801x ADC is a differential 12−bit resolution successive approximation register analog−to−digital converter unlike any other SAR ADC available on the market. It uses an innovative design to keep a low input capacitance of 2 pF, easily besting the typical SAR […]
App note: Applications of current DACs
App note from Maxim Integrated about current DACs and their uses. Link here The worldwide use of the electronic devices creates high demands for DACs to connect digital systems to the analog world such as the fiber optical communication networks, to bias photo diodes or to digitally control analog devices such as power supplies to […]
App note: Design and application guide of bootstrap circuit for high-voltage gate-drive IC
A deeper dive into controlling gates of MOSFETs with boostrap circuits talked in this app note from ON Semiconductors. Link here (PDF) The purpose of this paper is to demonstrate a systematic approach to design high−performance bootstrap gate drive circuits for high−frequency, high−power, and high−efficiency switching applications using a power MOSFET and IGBT. It should […]
App note: Understanding eFuse input voltage transients from hot plug events
App note from ON Semiconductors about things to look for when hot plugging eFuses. Link here (PDF) System designers must account for voltage surges that occur when supplies or loads are connected. eFuses are integrated circuits with many features to protect loads from these surges. However, it is important to ensure that the eFuse itself […]
App note: Lithium-Ion cell fuel gauging with MAXIM battery monitors ICs
App note from Maxim Integrated on accurately measuring battery capacity by using battery monitors and fuel gauge plus software. Link here Determining the remaining charge of a Lithium-Ion cell accurately under real world conditions requires much more than just coulomb counting. The DS2438’s integrated current accumulator (ICA) provides an accurate measurement of cell capacity under […]
App note: Implementing a practical off-line Lithium-Ion charger using the UCC3809 primary side controller and the UCC3956 battery charger controller
App note from Texas Instruments about Li-Ion battery charger design. Link here (PDF) A primary goal in the design of any portable electronic device is to make the product as small and lightweight as possible. When the device is powered by a rechargeable battery, a means of charging the battery from the AC line must […]
App note: Vishay load dump TVS series for 24 V powertrains
App note from Vishay on the changes to the load dump test condition and defines the maximum surge suppressing capability for Vishay load dump TVS series in these conditions. Link here (PDF) As more trucks and buses are built with complex electrical systems, load dump protection is becoming an important safety feature for vehicles with […]
App note: Signals with zero offsets
Dealing with zero offsets signals tackled in this app note from Murata. Link here (PDF) Many transducer outputs exhibit a dc offset voltage when the output level would normally be expected to be zero Volts (corresponding to a display reading of “000”). As an example, consider a pressure transducer whose output levels of 1.0Vdc to […]