App note from STMicroelectronics. Link here (PDF) This application note explains how to extend the common input voltage range of a standard operational amplifier (op amp) to realize a high-side current sensing.
Tag Archives: STMicroelectronics
App note: Introduction to comparators, their parameters and basic applications
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 […]
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: 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: Virtually increasing the number of serial communication peripherals in STM32 applications
App note from STMicroelectronics on possible alternate switching of channels to cater multiple communication routes. Link here (PDF) Application engineers often face the problem of limited number of serial communication peripherals of a microcontroller that, on the other hand fulfills all the other application requirements thanks to its features and performance. Sometimes they obviate by […]
App note: Interfacing an STM32L1xx microcontroller with an external I2S audio codec to play audio files
I2S protocol interfacing with an STM32 microcontroller app note from ST Microelectronics. Link here (PDF) The I2S protocol is widely used to transfer audio data from a microcontroller/DSP to an audio codec in order to play melodies (stored in a memory) or, to capture analog sound (from a microphone). The STM32L1xx allows I2S audio communication […]
App note: USB hardware and PCB guidelines using STM32 MCUs
Peripheral USB on STM32 MCUs app note from STMicroelectronics. Link here (PDF) STM32 microcontrollers include a group of products embedding a USB (Universal Serial Bus) peripheral. Full-speed and high-speed operations are provided through embedded and/or external PHYs (physical layers of the open system interconnection model). This application note gives an overview of the USB peripherals […]
App note: USB Type-C™ power delivery using STM32xx series MCUs and STM32xxx series MPUs
Guideline from STMicroelectronics on the basics of the two new USB Type-C™ and USB Power-Delivery standards. Link here (PDF) This new reversible USB Type-C™ connector makes plug insertion more user friendly. The technology offers a single platform connector carrying all the necessary data. Using the power delivery protocol, it allows negotiation of up to 100 […]
App note: Reset and supervisor ICs – frequently asked questions
All about supervisor ICs FAQs from STMicroelectronics. Link here (PDF)
App note: Receiving S/PDIF audio stream with the STM32F4/F7/H7 series
App note from STMicroelectronics about electrically connecting an external S/PDIF stream to an STM32 with an S/PDIFRX interface peripheral, Link here (PDF) The Sony/Philips Digital Interface Format (S/PDIF) is a point-to-point protocol for serial and uni-directional transmission of digital audio through a single transmission line for consumer and professional applications. The transmission of data can […]
App note: Basics and low-cost solution proposals to move from legacy USB2.0 connector to USB Type-C™ connector with STM32 devices
App note from STMicroelectronics about interfacing STM32 legacy USB 2.0 to USB Type-C. Link here (PDF) This application note is a guideline to introduce this USB Type-C connector onto platform to replace legacy USB2.0 connectors. It introduces some basis of the two new standards USB Type-C™ and the USB Power Delivery.
App note: Quad-SPI (QSPI) interface on STM32 microcontrollers
Extend memories by using external high speed memories interfaced to Quad-SPI modules on STM32 micros, app note from STMicroelectronics. Link here (PDF) This application note describes the Quad-SPI interface on the STM32 microcontrollers and explains how to use the module to configure, program, and read external Quad-SPI memories. It describes some typical use cases to […]
App note: USB audio bridge example with STM32F0 MCUs
App note from STMicroelectronics using their STM32F0 microcontrollers to playback audio stream from USB. Link here (PDF) This application note describes a method and an example of synchronizing audio playback or audio recording with an upstream or downstream USB audio host, ensuring flawless audio listening or recording using only internal MCU resources. Focusing on specific […]
App note: USB Type-C protection and filtering
STMicroelectronics’ solution for simplifying USB Type-C protection and filtering using transient voltage suppressors, common mode filtering and proper board layout. Link here (PDF) The USB interface has been present on the market for nearly 2 decades and thanks to that, nowadays it is quite obvious for everybody to connect electronic devices in this manner. However, […]
App note: How to select the right thyristor (SCR) for your application
SCR fundamentals discussed in this app note from STMicroelectronics. Link here (PDF) This document provides some guidelines about how to select the right thyristor, also referred to as “SCR”, according to the different applications. Some very specific cases could require a higher level of expertise to ensure reliable and efficient operation.
App note: How to implement an SCR or a Triac in hybrid relay applications
Another app note from STMicroelectronics on SCR or Triac hybrid with mechanical relay to decrease power loss and manage inrush current. Link here (PDF) This document gives some key information about the design of the solid-state silicon AC switch stage of a hybrid relay, which can drive resistive, capacitive or inductive AC loads, such as: […]
App note: AC switches – Is a positive power supply mandatory for my application, or could a negative output work also?
App note from STMicroelectronics about the usage of a negative supply in controlling AC switches and their benefits, Link here (PDF) In this application note we explain the reasons why some appliance designers might choose a positive power supply. This selection is based mainly on the choice of switched mode power supply (SMPS). Some specific […]
App note: Current sharing in parallel diodes
Application note from STMicroelectronics on the performance of each diode in a parallel diode connection and how the forward voltage dispersion can have a great impact over thermal effect on the current imbalance. Link here (PDF) The use of diodes in parallel is commonly found in power electronic design. An important consideration for this practice […]