Project Outline: Microcontroller RTC Dosimeter Op Amp Stage See DigiKey BoM for the Analog FrontEnd: www.digikey.com/en/mylists/list/476AJE8R2I

Project Outline: Microcontroller RTC Dosimeter Op Amp Stage See DigiKey BoM for the Analog FrontEnd: www.digikey.com/en/mylists/list/476AJE8R2I

The Texas Instruments MSP430FR604x and MSP430FR603x family comprises highly integrated ultrasonic sensing and measurement system-on-chips (SoCs) designed specifically for water and heat metering applications. The featured components, including MSP430FR6047, MSP430FR60471, MSP430FR6045, MSP430FR6037, MSP430FR60371, and MSP430FR6035, deliver best-in-class ultrasonic water flow measurement with ultra-low power consumption. These microcontrollers excel with an active mode current consumption of approximately 120 µA/MHz and a standby mode power draw as low as 450 nA with a real-time clock (RTC) enabled. Key functionalities include a high-precision differential time-of-flight (dTOF) accuracy of less than 25 ps, integrated analog front-end, programmable pulse generation (PPG), and an analog comparator. They also interface directly with standard ultrasonic sensors up to 2.5 MHz and feature up to 256KB FRAM, robust RAM options, and integrated LCD drivers for up to 264 segments. The embedded low-energy accelerator (LEA) enhances digital signal processing capabilities, making these components ideal for battery-powered metering solutions. Peripherals include multiple enhanced serial communication interfaces, high-performance ADCs, DMA controllers, and a suite of timers and encryption modules. These features combine to offer a powerful solution for high-accuracy, low-cost, and ultra-low-power metering applications.

3.3 V acoustic sensor analog front-end using ZTS6216 MEMS microphone and TLV9062 gain/filter stages, tuned for 2.5 kHz response with ADC-ready output, test points, analog grounding, and manufacturable PCB rules.

Project Outline: Microcontroller RTC Dosimeter Op Amp Stage See DigiKey BoM for the Analog FrontEnd: www.digikey.com/en/mylists/list/476AJE8R2I

Single-channel analog front-end for a 40 kHz air-coupled ultrasonic receiver using a 5 V single supply, buffered 2.5 V mid-reference, protection, gain, band-pass shaping, and ADC-ready output centered at VREF.

FlowState Headband EVT1 — 4-Channel EEG Calibration Device Closed-loop EEG neurofeedback headband for theta/beta baseline calibration. 4-layer mixed-signal PCB, 40x30mm. Core ICs: - ADS1299-4PAG (TI) — 4-channel 24-bit EEG analog front end, SPI interface, 250 SPS - nRF5340 (Nordic) — Dual-core BLE 5.3 SoC, 128 MHz app core + 64 MHz network core Key requirements: - Separate analog and digital power domains (dual LDO: LP5907 for AVDD, AP2112 for DVDD) - Split analog/digital ground planes with single-point connection - 6 electrode inputs (4 active + 1 reference + 1 DRL) with individual TVS ESD protection on each - LIS2DH12 accelerometer (I2C) for motion artifact detection - MCP73831 USB-C battery charging (300-500 mAh LiPo) - 2.4 GHz chip antenna or PCB trace antenna at board edge with 10mm keepout - Conformal coating for sweat/moisture protection Reference designs: - Analog front-end: TI ADS1299 EVM (SBAS499) - Digital/BLE: Nordic nRF5340 DK reference schematic Critical constraint: Microvolt-level EEG signals — analog input routing and power supply filtering are the highest-priority layout concerns.

Project Outline: Microcontroller RTC Dosimeter Op Amp Stage See DigiKey BoM for the Analog FrontEnd: www.digikey.com/en/mylists/list/476AJE8R2I

Project Outline: Microcontroller RTC Dosimeter Op Amp Stage See DigiKey BoM for the Analog FrontEnd: www.digikey.com/en/mylists/list/476AJE8R2I

Project Outline: Microcontroller RTC Dosimeter Op Amp Stage See DigiKey BoM for the Analog FrontEnd: www.digikey.com/en/mylists/list/476AJE8R2I