TI AFE4900YZT

243Поверхностный монтаж30-XFBGA, DSBGA

Overview

The AFE4900YZT device is an analog front-end (AFE) for synchronized electrocardiogram(ECG), photoplethysmogram (PPG) signal acquisition. The device can also be used for opticalbio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheralcapillary oxygen (SpO2). The PPG signal chain supports up to four switchinglight-emitting diodes (LEDs) and up to three photodiodes (PDs). The LEDs can be switched on using afully integrated LED driver. The current from the photodiode is converted into voltage by thetransimpedance amplifier (TIA) and digitized using an analog-to-digital converter (ADC). The ECGsignal chain has an instrumentation amplifier (INA) with a programmable gain that interfaces to thesame ADC. A right-leg drive (RLD) amplifier set can be used to the bias for the ECG input pins. ACand dc lead-off detect schemes are supported. The ADC codes from the PPG and ECG phases can bestored in a 128-sample first in, first out (FIFO) block and read out using either anI2C or a serial programming interface (SPI) interface.

Features

Applications

• RADAR processing, digital oscilloscopes
• CMOS Image sensors for mobile applications
• Medical Instrumentation and medical imaging
• Music recording
• Digital signal processing
• Scientific instruments
• Rotary encoder
• Displaying
• Transducer
• Microcontrollers.