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Maxim公司的MAXREFDES100#是康健传感器(hSensor)设计平台,集成了生物模拟前端办理方案(MAX30003),脉氧和心率传感器(MAX30101),两个人体温度传感器(MAX30205),三轴加快度器,3D加快度器和3D陀螺仪和睦压传感器,支持运动丈量,细密皮肤温度和各种生物电丈量,包罗ECG,EMG和EEG,以及三个波长(880nm,660nm,537nm)的脉搏血氧和心率检测.本京电港论坛文章先容了超低功耗MCU MAX32620/MAX32621主要特点,典范应用电路和MAXREFDES100#康健传感器(hSensor)设计平台框架图,电路原理图纸,质料清单和PCB线路板设计原理图. The MAX32620/MAX32621 is a 32-bit RISC ARM® Cortex®-M4F (M4 plus Floating Point Unit) microcontroller. It is ideally suited for the emerging category of medical and fitness applications. The architecture combines high-efficiency,signal-processing functionality with low cost, and ease of use. The device features 4 powerful & flexible power modes. Built-in dynamic clock gating and firmware controlled power gating minimize power consumption for any application.Multiple SPI, UART, and I2C serial interfaces,as well as a 1-Wire® master and USB,allow for interconnection to a wide variety of external sensors.A four-input, 10-bit ADC with selectable references is provided. The MAX32621 is a secure version of the MAX32620, incorporating a trust protection unit (TPU) with encryption and advanced security features. MAX32620/MAX32621优势和特点: High-Efficiency Microcontroller for Rechargeable Devices Internal Oscillator Operates Up to 96MHz MAX32620/MAX32621应用: Sport Watches MAXREFDES100#康健传感器(hSensor)设计平台 Maxim builds complex and innovative solutions for medical and high-end fitness applications. These solutions are primarily stemming from multiple product lines within Maxim. In order to help customers evaluate the features of these solutions quickly and enable them with their designs, Maxim developed an integrated sensor platform called "hSensor" Platform. With this platform, customers can evaluate our portfolio faster and more easily for multiple use cases. The hSensor platform is also flexible to accommodate our newer solutions in design, or on the roadmap. The hSensor platform supports the measurement of motion, precision skin temperature, and a variety of biopotential measurements, including electrocardiography (ECG), electromyography (EMG), and electroencephalography (EEG). In addition, the hSensor platform also supports a variety of reflective photo plethysmography measurements including pulse oximetry and heart-rate (HR) detection at three wavelengths, 880nm (infrared, IR), 660nm (red) and 537nm (green).
The platform supports GUI applications on Windows®-based PCs and Android®-based devices for simple data collection and visualization. Both direct USB connection (through a USB type C connector) and Bluetooth® low energy (BLE) radio are supported for configuration and data collections. A direct-to-flash memory mode is supported for data collection. Flash memory read using a USB connection is also implemented. The microcontroller of the platform is programmed with firmware that manages the system, controls the registers of all the devices on the platform, and communicates with the PC GUI. For users who want to customize the firmware for the microcontroller, refer to the firmware development guide for details: mbed (referenced as MAX32620HSP). The following items are included in the reference design box: MAXREFDES100# board: the health-sensor board The following use cases can be evaluated using this platform: MAXREFDES100#参考方案硬件形貌: The MAX32620 microcontroller lies at the center of the hSensor. The following sensors are installed: MAX30003biopotential analog front-end (AFE), MAX30205 human body temperature sensor, MAX30101 pulse oximeter and heart-rate sensor, LIS2DH 3-axis accelerometer, LSM6DS3 3D accelerometer and 3D gyroscope, and BMP280 absolute barometric pressure sensor. Power Supplies The hSensor platform can be powered by a USB connection or by a CR2032-type coin cell battery. When both USB and coin cell are attached the power is drawn from the USB due to MOSFET / Schottky diode at Q4. If a coin cell is attached without USB the coin cell is used to power the hSensor platform. The hSensor platform uses a MAX14720 PMIC for the majority of the power management. The PMIC has internal programming such that a 3-second button press at SW1 turns the device on. A 20-second press at SW2 turns the PMIC off. The PMIC has a power-on configuration that provides 1.2V, 1.8V and VSYS voltages. Here VSYS comes from SWOUT, which in turn comes from the battery or USB through the PMIC pin SWIN. After power-up, the microcontroller configures the PMIC for a boost voltage of 3.3V, which appears at the HVOUT pin. While the PMIC provides the majority of power management there are some additional power supply chips. The temperature sensors are powered by a MAX8880 LDO, which is powered by HVOUT (3.3V) and regulates this down to 2.5V. The PMIC itself is fed by a MAX8881 3.3V LDO when the hSensor is attached to USB. ESD protection is provided by the MAX3205, which attaches to all of the USB signals except for DP/DM, which have ESD protection provided by the MAX32620. |
MAX32620-MAX32621.pdf
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