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ADPD4000
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Analog Devices
ADPD4000 데이터시트 - Analog Devices
Analog Devices
GENERAL DESCRIPTION
The ADPD4000/ADPD4001 operate as a complete multimodal sensor front end, stimulating up to eight LEDs and measuring the return signal on up to eight separate current inputs. Twelve time slots are available, enabling 12 separate measurements per sampling period.
FEATURES
Multimodal analog front end
8 input channels with multiple operation modes to
accommodate the following measurements: PPG, ECG,
EDA, impedance, and temperature
Dual channel processing with simultaneous sampling
12 programmable time slots for synchronized sensor
measurements
Flexible input multiplexing to support differential and
single-ended sensor measurements
8 LED drivers, 4 of which can be driven simultaneously
Flexible sampling rate from 0.004 Hz to 9 kHz using internal
oscillators
On-chip digital filtering
SNR of transmit and receive signal chain: 90 dB
Ambient light rejection: 60 dB up to 1 kHz
400 mA total LED drive current
Total system power dissipation: 50 µW (combined LED and
AFE power), continuous PPG measurement at 75 dB SNR,
25 Hz ODR, 100 nA/mA CTR
SPI and I2C communications supported
256-byte FIFO
APPLICATIONS
Wearable health and fitness monitors: heart rate monitors
(HRMs), heart rate variability (HRV), stress, blood pressure
estimation, SpO2, hydration, body composition
Industrial monitoring: CO, CO2, smoke, and aerosol detection
Home patient monitoring
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