AFE956ABGA64

The AFE956 (AFE95x) is a series of multi-channel simultaneous sampling 24-bit delta-sigma analog-to-digital converters (ADCs), featuring built-in programmable gain amplifiers (PGA), an internal reference, and an on-board oscillator. The AFE95x encompasses all the functionalities typically required for medical electrocardiogram (ECG) and electroencephalography applications. With its high integration and exceptional performance, the AFE95x enables the development of scalable medical instrument systems with significantly reduced size, lower power consumption, and overall cost savings. 

Each channel of the AFE95x is equipped with a flexible input multiplexer (mux), which can independently connect to internally generated signals for testing, temperature monitoring, and lead-off detection. Additionally, any configuration of the input channels can be chosen to generate a right leg drive (RLD) output signal. The AFE95x operates at data rates up to 64kSPS, facilitating software-based pacemaker detection. Lead-off detection is implemented internally via pull-up/pull-down resistors or excitation current sinks/sources. Three integrated amplifiers produce the Wilson Central Terminal (WCT) necessary for standard 12-lead ECGs. Multiple AFE95x devices can be connected in a daisy-chain configuration in high-channel-count systems. 

The device is encapsulated in a compact 8mm × 8mm, 64-ball BGA package. The BGA version is rated for an industrial temperature range of -40°C to +85°C.