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The AFE44I30YZR is an ultra-low power integrated analog front-end (AFE) with a FIFO and I2C for wearable optical biosensing. This device supports up to six switchable light-emitting diodes (leds) and four photodiodes. Up to 24 signal phases can be defined, and signals can be obtained from each phase synchronously. The current of its photodiode is converted into voltage through a transimpedance amplifier (TIA) and digitized using an analog-to-digital converter (ADC).

Its main features include

Supports signal acquisition of up to 24 phases

Flexible allocation of 6 leds and 4 PDS can be achieved within each phase

Signals are simultaneously collected from different sensors at different data rates

Accurate and continuous heart rate monitoring

The SNR of the system is as high as 108dB at A 16µA PD current

When running continuously at A low current on A wearable device, the typical values are: 15µA for the LED and 20µA for the receiver

Support external clock and internal oscillator modes

Data can be obtained in a way that is synchronized with the system's master clock

Automatic environment, LED DC elimination

A FIFO with a sampling depth of 128

I2C interface

2.6mm × 2.1mm DSBGA package, 0.4mm pitch

Power supply: Rx: 1.7V-1.9V (LDO bypass) 1.9V-3.6V (LDO enabled), Tx: 3V-5.5V, IO: 1.7-3.6V

Application scenarios

AFE44I30YZR is mainly applied in the following scenarios:

Optical heart rate monitoring (HRM) for wearable devices and ear-worn devices

Heart Rate Variability Analysis (HRV)

Measurement by pulsating oximeter (SpO2)

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• 6.Can the company issue an invoice?

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