Analog Devices Inc. ADPD4000/1 Multimodal Sensor Front End can stimulate up to eight LEDs and measure the return signal on up to eight separate current inputs. Twelve available time slots can enable 12 separate measurements per sampling period. The data output and functional configuration utilize an I2C interface on the ADPD4001 or a serial port interface (SPI) on the ADPD4000. The control circuitry includes flexible LED signaling and synchronous detection. The devices use a 1.8V analog core and 1.8V/3.3V compatible digital input/output (I/O).
Features
8 input channels with multiple operation modes to accommodate the following measurements: PPG, ECG, EDA, impedance, and temperatureDual channel processing with simultaneous sampling12 programmable time slots for synchronized sensor measurementsFlexible input multiplexing to support differential and single-ended sensor measurements8 LED drivers, 4 of which can be driven simultaneouslyOn-chip digital filtering
Applications
Wearable health and fitness monitors: heart rate monitors (HRMs), heart rate variability (HRV), stress, blood pressure estimation, SpO2, hydration, body composition
