AS7057 Datasheet | ams

Description 3 7 Key Benefits & Features 3 8 Applications 4 Block Diagram 4 9 Ordering Information 5 Absolute Maximum Ratings 6 Electrical Characteristics 7 Package Drawings & Markings .... 9 Tape & Reel Information 10 Soldering & Storage Information 11 Revision Information 12 Legal Information 13 Short Datasheet - PUBLIC DS001053 - v1-00 - 2022-May-10 13 │ 2 Document Feedback AS7057 General Description 1 General Description The AS7057 Biosignal Sensor Analog Frontend (AFE) is the next generation Vital Sign Sensor. It enables the user to detect biosignals such as photoplethysmogram (PPG) and pulse transit time (PTT), as well as proximity. PPG is the most used HRM method. It measures the pulse rate - by sampling light modulated by the blood vessels, which expand and contract as blood pulses through them. Apart from HRM/HRV, optical Blood Pressure and Sp O2 are also enabled by the two independent working photodiode inputs of the AS7057. The AS7057 is a size and performance optimized analog frontend to support space-limited applications such as in-ear vital sign monitoring. The AS7057 provides three LED driver outputs, samples up to three photodiode inputs, and supports proximity detection integrated into one of the PPG signal channels. This enables high flexibility for several LED and photodiode arrangements in different applications. Furthermore, the AS7057 Biosignal Sensor Analog Frontend provides two ADC channels for simultaneous PPG measurements and an automatic photodiode offset control. The AS7057’s low-power design and small form factor are particularly well-suited for application in earbuds, fitness bands, smartwatches, sports watches, and smart patches. In these...