AFE159P4中文资料具有起搏器、导联脱落和导联质量检测以及 FIFO 功能的低功耗 4 通道 ECG AFE数据手册TI规格书

描述 Description

The AFE1594 is a family of multichannel, simultaneous sampling, 24-bit, delta-sigma (ΔΣ) analog-to-digital converters (ADCs) with built-in programmable gain Instrumentation Amplifiers (INAs), internal reference, and an on-chip PLL. The AFE supports digital pace pulse detection, thoracic impedance measurement and incorporates all of the features that are commonly required in medical electrocardiogram (ECG) and electroencephalogram (EEG) applications. Multiple AFE159x devices can be cascaded in high channel count systems. With high levels of integration and exceptional performance, the AFE159x enables the development of scalable medical instrumentation systems at significantly reduced size, power, and overall cost.

特性 Features

Integrated Signal Chain for ECG, Pace Detection, and Respiration Measurement

ECG Receiver

Four high resolution channels at low power of 0.42mW/channel

Flexible four leads selectable from six electrodes

Programmable gain: 1.25 to 9

Input-referred noise: 4µVPP in 150Hz BW

Differential input range: ±1V with Gain = 4

CMRR: -140dB

Data rate: 125SPS to 128kSPS



Pace Detection

On-chip digital pace detection algorithm on programmable two leads

High-speed 128kSPS pace output on two channels for software pace detection



Respiration

Low-noise of 24mΩPP with 2kΩ body impedance and 1kΩ defibrillator protection resistor on each electrode

Supports Sine and Square wave excitation



Other Features

Built-in right leg drive amplifier steerable to any electrode

DC lead-off detection, AC lead impedance detection, Wilson Center Terminal (WCT), Goldberger Central Terminals (GCT), test signals

Battery voltage monitoring

Flexible power-down and standby modes

Built-in oscillator, PLL, and reference

1k sample main FIFO and 2k sample pace FIFO

SPI-compatible serial interface

Analog supply voltage 1: 3.15V to 5.25V

Analog supply voltage 2: 1.7V to 1.9V

I/O supply voltage: 1.65V to 3.6V



Supports systems meeting AAMI EC11, AMI EC13, AMI EC38, IEC60601-1, IEC60601-2-25, IEC60601-2-27, and IEC60601-2-51 standards