TI adds on-chip respiration measurement to ECG/EEG analog front end family to simplify design of portable patient monitoring systems

Key features and benefits

· Provides respiration impedance at a resolution of 20 milliohms, enabling the accurate monitoring and correlation of patient respiration to ECG abnormalities.

· Integrates 44 discrete components, reducing board space up to 97 percent. In addition to a fully-integrated respiration impedance function with user-selectable phase adjustment, ADS1298R devices include eight analog-to-digital converters (ADCs), eight programmable gain amplifiers (PGAs), eight active filters and pace detect interface, lead off detection, voltage reference, right leg drive (RLD) and more.

· Uses only 750 uW/channel, up to 95 percent lower power consumption than discrete implementations, with multiple power-down configurations to increase the battery life of portable patient monitoring devices.

· Typical 4-uVpp input-referred noise surpasses the International Electrotechnical Commission’s IEC60601-2-27/51 standard, enabling extremely high levels of accuracy in portable and high-channel-density ECG equipment.

· Complementing the leading power consumption of the ADS1298R is the TMS320C5515 ultra-low-power DSP, which uses less than 0.15 mW/MHz to further extend battery life.

Tools and support

An evaluation platform is available for the ADS1298R devices. The ADS1298R Performance Demonstration Kit (ADS1298RECGFE-PDK) includes easy-to-use evaluation software; built-in analysis tools, including oscilloscope, FFT and histogram displays; flexible input configurations; optional external reference circuits; and the ability to export data in simple test files for post processing.