GXSC four channel 24 bit physiological electrical acquisition simulation front-end chip GX1294 replaces ADS1294 for treadmill application

Modern treadmills require real-time collection of data such as user heart rate, exercise posture, and treadmill load, providing users with exercise intensity analysis and health reports. At the same time, they need to have safety protection functions. The GXSC four channel 24 bit physiological electrical acquisition simulation front-end chip GX1294 has high-precision bioelectric signal acquisition, multi-channel synchronous sampling, low-noise anti-interference, and integrated medical grade functions, perfectly adapting to the exercise monitoring and safety protection needs of treadmills.

The simulation front-end chip GX1294 is designed for ECG application scenarios and can accurately collect bioelectric signals such as EEG, ECG, EMG, etc. It has functions such as respiratory detection, right leg drive, lead detachment detection, pacing detection, WCT, etc. It can be switched to internal clock and internal reference, simplifying the ECG peripheral circuit and significantly reducing the size, power consumption, and cost of the application product. GX1294 is 100% compatible with ADS1294 software and hardware for use in treadmill solutions, with lower noise, lower power consumption, and higher cost-effectiveness.

The intensity of electrocardiogram signals varies from person to person and can also fluctuate under different physiological states. GX1294 is equipped with a programmable gain amplifier (PGA) that allows for flexible gain adjustment. Regardless of whether the signal is strong or weak, PGA can amplify it to an appropriate range, fully utilizing the advantage of 24 bit resolution to further improve measurement accuracy and dynamic range, ensuring high-quality electrocardiogram data can be obtained in various situations.

The main features of GX1294 are as follows:

Data rate: 31.25SPS to 32kSPS

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

Ultra low input reference noise: 4.07 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

• Supports 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

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