AFE4900YZR (Texas Instruments)

AFE4900YZR - analog front-end (AFE) for synchronized electrocardiogram (ECG), photoplethysmogram (PPG) signal acquisition. The device can also be used for optical bio-sensing applications, such as heart-rate monitoring (HRM) and saturation of peripheral capillary oxygen (SpO2). The PPG signal chain supports up to four switching light-emitting diodes (LEDs) and up to three photodiodes (PDs). The LEDs can be switched on using a fully integrated LED driver. The current from the photodiode is converted into voltage by the transimpedance amplifier (TIA) and digitized using an analog-to-digital converter (ADC). The ECG signal chain has an instrumentation amplifier (INA) with a programmable gain that interfaces to the same ADC. A right-leg drive (RLD) amplifier set can be used to the bias for the ECG input pins. AC and dc lead-off detect schemes are supported. The ADC codes from the PPG and ECG phases can be stored in a 128-sample first in, first out (FIFO) block and read out using either an I2C or a serial programming interface (SPI) interface.

• Manufacturer: Texas Instruments
• Product Category: Analog Front End - AFE
• Series: AFE4900
• Type: Ultra Low Power
• Resolution: 24 bit
• Sampling Rate: 1 kS/s
• Number of Channels: 3 Channel
• Interface Type: I2C, SPI
• Supply Voltage - Max: 5.25 V
• Supply Voltage - Min: 1.7 V
• Minimum Operating Temperature: - 20 C
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package/Case: DSBGA-30
• Packaging: Reel
• Features: Optical biosensing
• Product: Analog Front Ends
• Brand: Texas Instruments
• Product Type: Analog Front End - AFE
• Subcategory: Data Converter ICs