MEMS microphone evaluation board based on STA321MPL and MP34DB01 (microphone processor + digital uPhone MEMS)
PD84001-Based 1 W/135 - 175 MHz Evaluation Board
BGU8063 Evaluation Board
The MAXREFDES1158 is a 5V supplied, 2.75kVRMS isolated, 500kbps, RS-485 module using the MAX14946. This reference design demonstrates how to build an isolated RS-485 module with a low-cost transformer to provide isolated power.
Might not be an actual working transmitter, but it does produce a few mW of RF power at 4 MHz using only two LMC555s.
Principle of Operation (see attached simplified schematic):
At lower operating voltages, the flip-flop (TR) input of the LMC555 can be used as an inverting comparator input to control the output of the device. This requires the Threshold (TH) input to be active (high). This circuit applies a DC bias at the switching threshold of TR and superimposes a small AC feedback signal to create an oscillator. An inverted version of the same signal is applied to the second LMC555 to produce two complementary open collector outputs (the device's discharge output). The output is then connected as a standard push-pull RF amplifier. The TH input is used as the enable input to key the transmitter.
The basic functions of USB-C are supported, such as high-speed communication and charging functions. Then this design solves the problem of painless switching between one host and multiple devices, or one device and multiple hosts.
Class G capacitorless headphone amplifier based on TS4621E
Discontinued board. 2 W/860 - 960 MHz Evaluation Board based on PD84002
650 W / 88 - 108 MHz reference design using 2x SD2932
20 W + 20 W Dual BTL Class D Audio Amplifier Demonstration Board Based on TDA7491HV
Suitable for STM32 Nucleo, STA350BW-based sound terminal expansion board
The TIDA-00771 is a 20A RMS driver for three-phase brushless DC (BLDC) motors in power tools powered by 3-cell Li-ion batteries (voltage range 5V to 12.6V). The design is a compact 45 x 50 mm actuator that enables sensor-based trapezoidal control. The design uses a discrete compact MOSFET-based three-phase inverter that delivers 20A RMS continuous (70A peak for 1 second) winding current without the need for any external cooling devices or heat sinks. The gate driver's slew rate control and charge pump ensure maximum inverter efficiency (>97% at 10.8V DC) from 5V to 12.6V with optimal EMI performance. Cycle-by-cycle overcurrent protection prevents large stall currents in the power stage, and the board can operate in ambient temperatures up to 55°C. The small form factor allows placement of the plate close to the battery pack, the high efficiency allows the battery to last longer, and the 70A peak current capacity delivers high instantaneous peak torque in power tools.
BGU6104 Unrivaled MMIC, Low Noise Amplifier for ISM and LTE Bands
BGU6102 Unparalleled MMIC, Low Noise Amplifier for FM, ISM and LTE Bands
The FRDMCD1020EVM Evaluation Board (EVB) features the CD1020, a 22-channel switch detection interface with a programmable wetting current.
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