AFE904AQFP64

The AFE904 is a multi-channel, simultaneous sampling 24-bit Δ-Σ analog-to-digital converter (ADC) series, featuring a programmable gain amplifier (PGA), internal reference, and on-board oscillator. The AFE90x (1) incorporates all the functionalities typically required for medical electrocardiogram (ECG) applications. With its high integration and outstanding performance, the AFE90x enables the development of scalable medical instrument systems with significantly reduced size, power consumption, and overall cost. Each channel of the AFE90x includes a flexible input multiplexer (mux), which can be independently connected to internally generated signals for testing, temperature, and lead-off detection. Additionally, any configuration of the input channels can be used to generate the right leg drive (RLD) output signal. Lead-off detection is internally implemented through pull-up/pull-down resistors or excitation current sinks/sources. Three integrated amplifiers are utilized to generate the Wilson Central Terminal (WCT) necessary for standard 12-lead ECG. Multiple AFE90x devices can be connected in a daisy-chain configuration in high-channel-count systems. Package options include a QFP-64 package and a compact 8mm × 8mm, 64-ball BGA. The BGA version is rated for industrial temperature ranges from -40°C to +85°C.