The MAXREFDES117# reference design is a photoplethysmogram (PPG-optical) based heart-rate and SpO2 sensor. mbed and Arduino firmware and hardware design files as well as lab measurements are provided. Boards are available for purchase.
In most video applications, the video signal generated from the DAC requires a reconstruction filter to smooth out the signal and attenuate the sampling aliases. The MAX4090 is a direct, DC-coupled output driver, which can be used after the reconstruction filter to drive the video signal. The driving load from the video DAC can be varied from 75Ω to 300Ω. A low input impedance (< 100Ω) is required by the MAX4090 in normal operation, special care must be taken when a reconstruction filter is used in front of the MAX4090.
This application note discusses how to best bias the AC signal to within the DC supply range and how to use digital potentiometers in circuits designed for mechanical potentiometers. This understanding is crucial to effectively using the DS1802 in a pushbutton-controlled audio preamplifier circuit.
4-channel, flexible, configurable, voltage and current output circuit for I/O card and PLC applications
Single op amp demo board, SC70 or SOT-23 package
It can be powered via a USB port and has an LCD interface for standalone use without a PC. ERASynth Micro uses a dual-loop PLL architecture to provide fast frequency switching and fine tuning resolution. Frequency, amplitude and pulse modulation capabilities are also available.
DAQ on a Stick Strain Gauge with Programmable Chopper Stabilized In Amp
Low-side current sensing evaluation board based on TSZ121 op amp
The MAXREFDES70# reference design is a high-precision, low-cost, low-power consumption, battery-powered heat/flow meter featuring the MAX35101 ultrasonic time-to-digital (TDC) converter with analog front-end (AFE). The reference design provides a high-performance flow/heat meter design platform that works as a foundation for many specific meter applications. The system utilizes the ultrasonic time-of-flight (TOF) measurement principle. A 3.6V, 4.0Ah, size A lithium -thionyl chloride battery powers the system and can last up to 20 years for typical use. Test results, hardware files, and firmware source code provide complete documentation for the design. The complete meter is also available for purchase.
Dual operational amplifier series bare PCB evaluation board, MSO8 package
Dual op amp series bare PCB evaluation board, MSO10 package
Dual operational amplifier series bare PCB evaluation board, DFN8 package
Single Channel Op Amp Demonstration Board, SO8 Package
Dual operational amplifier series bare PCB evaluation board, DFN8-EP package
This article reviews the basic characteristics of common temperature sensors, describes the RTD PT100 temperature transducer, and explains a simple analog approach for linearizing and conditioning the output of that device.
MAXREFDES143# subsystem reference design secures industrial IoT systems using a DS2465 SHA-256 Coprocessor and DS28E15 SHA-256 authenticator with 1-Wire.
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