GXSC AFE Replacement for ADS1291R in Pet Heart Rate Monitor

The smart health monitoring pet heart rate collar integrates biosensing technology with AI algorithms to enable real-time monitoring and anomaly alerts for core physiological indicators like heart rate, respiration, and body temperature. Combined with behavior analysis and an emergency rescue system, it builds a 24/7 health protection network for pets. High-precision biosensors (optical heart rate monitoring + non-invasive temperature detection) continuously capture vital signs during rest and exercise, automatically triggering alerts for abnormal fluctuations (e.g., tachycardia, sudden temperature changes).

GXSC‘s high-performance AFE overcomes key challenges in pet heart rate monitors—including weak signal acquisition, motion interference resistance, extended battery life, and compact wearability—through its core advantages: 24-bit precision, low noise, low power consumption, high anti-interference capability, and high integration. This chip enables precise pet heart rate signal capture without complex peripheral design, significantly simplifying hardware development and reducing R&D costs.

Specifically engineered for bioelectric potential measurement, the GXSC AFE offers 100% hardware/software compatibility with the ADS1291. Its 24-bit resolution enables precise quantification of pets‘ faint ECG signals, while advanced low-noise design incorporates an internal programmable gain amplifier (PGA) and digital filter to effectively suppress noise interference.

Tailored for ECG applications, the GXSC AFE incorporates right-leg drive, lead disconnection detection, pacemaker detection, and WCT functionality. It supports switching between internal clock and internal reference, simplifying ECG peripheral circuits and substantially reducing the size, power consumption, and cost of application products. This makes it ideal for skin-contact wearable pet smart collars. Key features include:

• Data rate: 31.25 SPS to 32 kSPS

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

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

• CMRR: 120 dB

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

• Ultra-low power consumption of only 410μW in LP mode (AVDD=3V, DVDD=1.8V, ODR=500SPS, G=6)

• Integrated low-drift reference; built-in clock with adjustable frequency and external output capability

• Integrated right leg drive amplifier, lead disconnection detection, temperature sensor, test signal

• Supports digital pacemaker detection

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

• Offset/Gain error calibration function

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

• Flexible power-down and standby modes

• SPI interface

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

Translated with DeepL.com (free version)