ams AS7058
High performance vital sign - analog frontend
The AS7058 is an integrated multi-vital sign monitoring device, which provides a complete photoplethysmogram (PPG), electrocardiogram (ECG), body impedance (BioZ), and electrodermal activity (EDA). PPG measures the pulse rate or blood oxygen by sampling light modulated by the blood vessels, which expand and contract as blood pulses through them. ECG is the reference for any measurement of the biopotential generated by the heart. With EDA, it is possible to measure the skin’s water content, and with BioZ, the body composition with an electrical system.
Features
- 2 ADC (20-bit) for PPG acquisition
- 1 ADC (20-bit) for ECG/BIOZ acquisition
- 8 photodiode input pins
- 8 emitters driven by 2 drivers up to 300mA at 500mV
- PPG SNR up to 120dB FS (white card loop back test)
- Advanced ambient light offset cancellation (AAOC)
- Excellent ECG, CMRR ~ 118dB, Noise ~ 0.68µVRMS
- Power consumption down to < 20µA @ 25 SPS
- Package: 2.815 x 2.545 x 0.5 mm³, WLCSP, 42 pins
Applications
Mobile & Wearables - Vital Sign Monitoring
Benefits
- Lowest noise ECG frontend (0.68µVRMS)
- Synchronized PPG and ECG for blood pressure
- Lowest power consumption on the market
- Innovative functions to measure galvanic skin response and bio-impedance (body composition)
- High variety and number of sensing inputs allow implementation of the widest variety of vital sign monitoring technologies for consumer medical applications and smart watches, fitness bands, monitoring patches
