In medical electronics and portable health monitoring equipment,analog front-end(AFE)plays a key role as a"sensory bridge",which is responsible for collecting and preliminarily processing human physiological signals.A high-performance,high-integration AFE can significantly improve the accuracy of equipment and reduce the overall design size.Yingshang provides an integrated chip-ADX 922 AQFN32 analog front-end AFE,which can perfectly realize the effective compatibility and substitution of similar products ADS1292R.
 

Highly integrated,optimized for medical monitoring

ADX922 analog front-end AFE belongs to 24-bitΔ-σADC series with multi-channel synchronous sampling,and its core advantages are high integration and low power design.The analog front-end chip integrates a programmable gain amplifier(PGA),a high-precision ADC,a reference voltage source and an oscillator.A single chip can complete key tasks such as signal amplification and analog-to-digital conversion,which greatly simplifies the front-end circuit design of ECG,motion monitoring and other equipment.Analog front-end AFE ADX922/3 model integrates respiratory impedance measurement function,and can realize respiratory monitoring without external complex circuits,which is very suitable for portable medical or fitness equipment with high integration requirements.Its working temperature range is-40 C to+85 C,which ensures the reliability of the equipment in various environments.

Excellent compatibility:directly replace ADS1292R.
 

ADX922AQFN32 analog front-end AFE provides excellent pin compatibility and functional substitution for the existing R&D teams that adopt ADS1292R.Both packages are QFN32(4mm x 4mm),which greatly reduces the difficulty and risk of hardware replacement.In terms of performance,the ADX922 analog front-end AFE is also equipped with two low-noise pgas and two 24-bit high-precision adcs,which can support the adjustable data rate from 8kSPS to 16kSPS,the input noise is as low as 8.8μV(G=6),and the common-mode rejection ratio is excellent,ensuring the clear acquisition of weak physiological signals.Its built-in functions such as input multiplexer,lead drop detection,right leg drive output and internal test signal completely cover and improve the original design requirements.
 

Why choose ADX922 AFE

System cost and size are both reduced:high integration saves a lot of peripheral components,reduces PCB area,and reduces material and management costs.
 

Simplify the design and speed up the listing:analog front-end AFE compatible substitution reduces the redesign cycle,and SPI communication interface is convenient for single chip microcomputer connection.
 

Functions fully meet the high-end requirements:analog front-end AFE integrates respiratory impedance detection,flexible lead configuration,internal self-check and other functions,which significantly improves the added value of the equipment.
 

Under the trend of precision medical care and mobile health,it has become an important direction for equipment upgrading and development to choose analog front-end AFE with high performance and high integration like ADX922AQFN32.Its hardware compatibility and functional enhancement with ADS1292R provide a reliable shortcut for rapid product iteration.For engineers who pursue miniaturization,low power consumption and high reliability,this chip is undoubtedly one of the ideal choices in ECG and vital signs monitoring.


Keywords:analog front-end AFE