返回
Products
Power Management
Imaging Solutions
Motor Controllers and Drivers
Microcontrollers (MCUs)
Amplifiers
Interfaces
返回
Applications
Automotive
Consumer Electronics
Enterprise Systems
Industrial
Power Supplies
返回
Supports
Support Tools
Technical Information
Software Download
Reference Designs
返回
News & Events
News & Events
返回
ESG
Sustainable Development Policy and Implementation
Stakeholders
返回
Investors
Financials
Corporate Governance
Shareholder Services
Contacts
WTHRM121
WTHRM121, a heart rate monitoring MCU, is using PPG (Photoplethysmographic) technology for the applications of continuous heart rate measurement. It includes CPU, flash memory, SRAM, ADC, filters, amplifiers, LED intensity control circuits, serial interfaces and internal oscillator.PPG is a non-invasive technique which is especially suitable for wearable devices. With Weltrend’s state-of-the-art automatic motion artifact removal algorithm, WTHRM121 could be used on smart watches, sport watches or bracelets to continuously detect, measure, calculate and display heart rate during walking, running… etc.
Features
- Supply Voltage Range:
-4.75V ~ 5.25V @ USB Interface or
-3.3V @ DVDD, AVDD, VDDADC
- Supply Voltage Sources
-Digital circuits: DVDD
-Analog-to-Digital Converter (ADC): DDADC
-Analog Circuits: AVDD
- Transmit Path
-Programmable LED duty control
-Automatic LED intensity control
- Receive Path
-Integrated band pass filters, low noise amplifiers and ADC
-Integrated motion artifact removal algorithm
- UART/IIC Interfaces: Heart rate data output
- Power Management: Power-on Reset/Brown-Out Reset (POR/BOR)
- Package: QFN64 (7.5mm x 7.5mm x 0.75mm)
- Supply Voltage Range: