MCU Products
Professional microcontroller solutions for your applications
The BH66F2665 is a high-performance 8-bit RISC Flash MCU specifically engineered for 8-electrode AC Body Composition Scale applications. This SoC integrates a specialized dual-core measurement engine that combines a 24-bit Delta-Sigma A/D converter for precision weighing with a dedicated AC Bio-impedance Analysis (BIA) circuit.
Dual-Core Measurement Precision
Medical-Grade Weighing: Directly interfaces with external load cells using high-gain operational amplifiers and a multi-channel 24-bit ADC to deliver superior accuracy and low-noise performance.
Professional BIA Engine: Employs an AC signal through electrode slices to measure human body impedance, utilizing a hardware IQ Demodulator to accurately capture both magnitude and Phase Angle.
Integrated System Features
Robust Memory Architecture: Features Flash Memory for multi-programming, alongside a dedicated True EEPROM area for secure storage of non-volatile data such as calibration parameters and serial numbers.
Flexible Connectivity: Fully integrated SPI, I2C, and UART interfaces ensure seamless communication with external peripherals and wireless modules like BLE or Wi-Fi.
Advanced Power Management: Optimized for battery-powered devices, maintaining an ultra-low standby current (<1.5μA) while providing multiple oscillator options (HIRC, LIRC, LXT) to balance processing power and energy efficiency.
High Integration & Reliability
Simplified System Design: Built-in specialized circuitry—including a sine-wave generator (1kHz~500kHz) and high-sink LED drivers—minimizes the need for external components, significantly reducing board space and simplifying the overall BOM.
Enhanced Display Support: Features I/O with 4-level adjustable constant current, allowing the MCU to drive LED panels directly without external resistors, ensuring uniform brightness.
Industrial-Grade Protection: Includes an internal Watchdog Timer (WDT), Low Voltage Reset (LVR), and electrode disconnection detection to ensure reliable operation and valid measurements.
Features
Professional Bio-Impedance AFE
- - Integrated BIA Engine: Built-in circuit featuring a programmable Sine-wave Generator (1kHz ~ 500kHz) and a hardware IQ Demodulator.
- - Vector Accuracy: Precision measurement of AC impedance magnitude and Phase Angle for advanced segmental analysis.
- - Segmental Support: Fully supports 4/8-electrode configurations with integrated electrode disconnection detection.
Medical-Grade Weighing Precision
- - High-Resolution ADC: Features a multi-channel 24-bit Delta-Sigma ADC (ENOB > 20 bits) for direct load cell interface.
- - Low-Noise Performance: Delivers 1μV resolution, ensuring stable weight sensing for clinical-grade devices.
Smart Direct-Drive LED Driver
- - Simplified Circuitry: Eliminates the need for external resistors and transistors, ensuring uniform display brightness while reducing PCB footprint.
