Benchmark ADS1298, based on GX1298 sleep monitor biopotential measurement solution

With the development of the recreation industry and the gradual attention to sleep health, sleep monitoring products are becoming more and more popular and have become one of the new choices for many people to pay attention to sleep problems and guard sleep health. Consumers‘ demand for high-quality, personalized sleep monitoring products is gradually increasing. Product quality, product performance, whether the product can meet the user‘s personalized needs, etc., have become the key factors of competition in the sleep monitoring market.

General sleep detector through the sleep monitoring pad / tape used by the piezoelectric film can be mainly in the feeling of the human heart beating or breathing produced by the tiny deformation, to obtain the human vital signs signals. And the precise biopotential measurement device ensures accurate measurements in a variety of environments. This excellent noise performance enables it to provide high quality data in low signal measurement environments, providing a reliable basis for medical diagnosis. This article recommends the GX1298 hardware and software to replace the ADS1298 for sleep monitors, providing a high-performance, reliable and cost-effective solution for medical device manufacturers.

The GX1298 is an eight-channel, 24-bit AFE with a built-in programmable gain amplifier (PGA), internal reference and built-in oscillator. Designed for ECG application scenarios, it features respiration detection, right leg drive, lead detachment detection, pacing detection, WCT, etc. It can be switched to internal clock and internal reference, thus simplifying ECG peripheral circuits, and dramatically reducing the size, power consumption and cost of products for this application. Its main features are as follows:

- Data rate: 31.25SPS to 32kSPS

- Programmable gain: 1, 2, 3, 4, 6, 8 or 12

- Ultra-low input reference noise: 4.07µVpp (0.64µVrms) (BW=150Hz,G=6)

- CMRR:120dB

- Flexible power modes: High-speed mode (HS), Low-power mode (LP), Ultra-low-power mode (ULP)

- Low power mode, power consumption only 410µW (AVDD=3V, DVDD=1.8V, ODR= 500SPS, G=6)

- Built-in low temperature drift reference; built-in clock with external output and adjustable frequency.

- Built-in right leg drive amplifier, lead shedding detection, temperature sensor, test signals

- Support digital pacing detection

- Adjustable data buffer depth (1/2/4/8/16/32)

- Offset/Gain error calibration function

- Power supply range: analog power supply: 2.7V to 5.25V; digital power supply: 1.8V to 5.25V

- Flexible power-down and standby modes

- SPI interface

- Operating temperature range: -40°C to +85°C