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Mingjiada Electronics [for sale TI] ultra-low power integrated AFE AFE4900YZR for wearable optical and electrical biosensing, only original, quality assurance, price advantage, welcome to call!!!

Product Description:

The AFE4900YZR device is an analog front end (AFE) for synchronous electrocardiogram (ECG), photoelectroencephalogram (PPG) signal acquisition. The device can also be used for optical biosensing applications such as heart rate monitoring (HRM) and peripheral capillary oxygen saturation (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 by a fully integrated LED driver. The current from the photodiodes is converted to voltage by a transimpedance amplifier (TIA) and digitised by an analogue-to-digital converter (ADC). The ECG signal chain has an instrumentation amplifier (INA) with programmable gain, interfaced to the same ADC. A right leg drive (RLD) amplifier set is available for biasing the ECG input pins. AC and DC lead detection schemes are supported. ADC codes from the PPG and ECG stages can be stored in a 128 sample first-in first-out (FIFO) block and read out using the I 2C or Serial Programming Interface (SPI) interface.

Features:

-Synchronous PPG for ECG signal acquisition at data rates of up to 1 kHz

-ECG signal chain:

-Independent ECG acquisition at up to 4 kHz

-Input bias: 1-lead ECG with RLD bias

-Programmable INA gain: 2.15 to 12.92

-Input noise (1 Hz to 150 Hz): 2.5µVrms at 1 kHz, 1.25µVrms at 4 kHz data rate

-AC, DC pin-out detection: 12.5-nA to 100 nA

-IEC 60601 test report available on request

-PPG receiver:

-Supports three time-multiplexed PD inputs

-24-bit representation of PD current

-DC offset subtracted DAC for TIA input per LED (up to ±126 µA), ambient

-Digital ambient subtraction of ADC outputs

-Noise filtering with programmable bandwidth

-Transimpedance gain: 10 kΩ to 2 MΩ

-Dynamic range up to 100 dB

-Receiver operates in PPG mode only, with a sampling rate of approx. 1-µA/Hz

-Power-down mode: approx. 0 μA

-PPG transmitter:

-Four LEDs in common anode configuration

-8-bit LED current up to 200 mA

-Mode for lighting two LEDs in parallel

-Programmable LED turn-on time

-Three LEDs for simultaneous support of SpO2 or multi-wavelength HRM

-30 μA average current sufficient for typical heart rate monitoring scenarios:

-20 mA setting, 60 μs pulse duration, 25 Hz sampling rate

-Timed using external or internal clock

-FIFO with 128 sample depth for ECG and PPG

-I2C, SPI interfaces: selectable by pin

-2.6mm x 2.1mm, 0.4mm pitch DSBGA package

-Supplies:

-Rx:1.8 V to 1.9 V (LDO bypass), 2.0 V to 3.6 V (LDO enabled)

-Launch: 3 V to 5.25 V

-IO: 1.7 V to Rx_SUP

Applications

- Synchronous PPG, ECG for blood pressure measurement Estimation

- HRM for wearables, hearing devices

- Heart rate variability (HRV)

- Pulse oximetry (SpO2 ) measurements

Contact details:

Tel: +86 13410018555

Email: sales@hkmjd.com

Company website: www.hkmjd.com