Low power consumption dual-channel 24-bit GX1292 for sports and fitness ECG detection, can replace ADS1292

Athletes in high-intensity training or competition, the use of portable ECG monitoring equipment can be real-time monitoring of changes in the ECG signal, timely detection of sports arrhythmia and other abnormalities, to protect the life safety of athletes, but also helps the coach to adjust the training program based on ECG data to improve the training effect. This paper focuses on the application of biopotential measurement analog front-end chip GX1292 to replace ADS1292 in portable ECG detection equipment.

GX1292 is a low-power dual-channel 24-bit biopotential measurement analog front-end chip that integrates all the features of portable low-power ECG applications, and is able to accurately convert weak ECG signals into digital signals. The high resolution of GX1292 can capture more subtle changes in the ECG signals such as changes in ECG waveforms in the event of arrhythmia and other abnormalities, which can provide a more accurate basis for diagnosis.

During exercise, the human body generates a variety of interference signals, such as muscle electrical activity, motion artifacts, etc. The GX1292 has excellent low noise performance 8μVPP (150Hz BW, G= 6), which can effectively suppress these interferences and ensure the quality of the monitoring data, the GX1292 has a flexible input mux that can be independently connected to internally generated test signals, temperature detection and disconnection detection. Users can configure the built-in right-leg drive circuitry flexibly between the two channels and can choose whether to use pull-up/down currents at the electrode ports for wire-break detection.The GX1292 also supports respiration detection with an output data rate of up to 16 KSPS.

GX1292 Application Advantages:

- Power consumption: 340μW/channel

- Input reference noise: 8μVPP (150Hz BW, G=6)

- Input bias current: 200pA

- Data Rate: 125SPS to 16kSPS

- Programmable Gain: 1, 2, 3, 4, 6, 8, 12, 16, 24, 32, 64, 96

- Oscillator initial accuracy: ± 0.5% (25 ℃); temperature drift ± 1% (-40 ℃ ~ 85 ℃)

- Built-in right leg drive amplifier, lead detection and test signals, built-in respiratory detection circuitry

- Low-power mode and standby mode flexible conversion, SPI-compatible serial interface

- Operating temperature range: -40 ℃ to 125 ℃