GXSC 6-channel 24 bit ADC GX1296R software and hardware replacement ADS1296R application in multi-channel sleep devices

Multi channel sleep devices (PSG) are used in the fields of sleep medicine and sleep health management to determine sleep status through multi signal correlation analysis. This type of device needs to synchronously collect multidimensional physiological signals such as electroencephalography, electrocardiography, electromyography, electrooculography, respiratory airflow, and blood oxygen saturation, and determine sleep stages and types of sleep disorders by analyzing signal characteristics.

The GXSC 6-channel 24 bit analog front-end chip GX1296R with respiratory function is a high-precision ADC designed for the medical and health field. It has 6-channel differential input capability and supports multidimensional analysis of sleep staging, apnea, limb movement, and other aspects of multi-channel sleep devices. GX1296R also integrates medical grade functions such as programmable gain amplifier, right leg drive circuit, internal reference voltage, and respiratory impedance measurement module. The device characteristics can meet the application requirements of "synchronization, precision, low noise, and anti-interference" for multi-channel sleep devices.

Ultra low noise and high resolution: The GX1296R analog-to-digital converter has a data rate of up to 15.625SPS to 32kSPS, which can quickly collect electrocardiogram signals and meet the real-time monitoring needs of the rapidly changing state of the heart. The input reference noise (average value of all channels) is 4.11 μ Vpp (0.64 μ Vrms) (BW=12.5Hz, G=6), and the GX1296R has excellent low noise performance, which can avoid the pollution of its own noise on the original electrocardiogram signal, provide more accurate signal data, and greatly improve the accuracy of diagnosis.

The main features of GX1296R are as follows:

Data rate: 15.625SPS to 32kSPS

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

Ultra low input reference noise: 4.07 μ Vpp (0.64 μ Vrms) (BW=150Hz, G=6)

CMRR:120dB

Flexible power consumption modes: High Speed Mode (HS), Low Power Mode (LP), Ultra Low Power Mode (ULP)

Low power mode, with a power consumption of only 410 µ W (AVDD=3V, DVDD=1.8V, ODR=500SPS, G=6)

Built in low-temperature float benchmark; Built in clock, capable of external output, and adjustable frequency

Built in right leg driver amplifier, lead detachment detection, temperature sensor, test signal

Can support digital pacing detection

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

Offset/Main error calibration function

Power supply range: Analog power supply: 2.7V to 5.25V; Digital power supply: 1.8V to 5.25V

Flexible power-off and standby modes

SPI interface

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

Replace TI‘s ADS1296R with software and hardware