ADS1294/ADS1294R Replacement: GX1294 Pin-to-Pin 4-Channel ECG AFE

GX1294 is designed for high-precision ECG, EEG, EMG and patient-monitoring systems. It supports output data rates up to 32 kSPS and integrates the primary analog, monitoring and diagnostic functions required by multichannel biopotential acquisition equipment.

Integrated respiration measurement, right-leg drive, lead-off detection, pacemaker detection, WCT and GCT help reduce external circuitry, PCB size and overall system power consumption.

GX1294 as a Direct ADS1294 and ADS1294R Replacement

GX1294 provides four simultaneous-sampling 24-bit delta-sigma ADC channels with integrated programmable gain amplifiers. Each channel supports single-ended and differential signal-acquisition configurations.

The compatible package, pin configuration and SPI control interface support direct replacement of ADS1294 and ADS1294R. Existing designs can retain their original schematic, PCB, processor interface and acquisition software.

GX1294 also provides integrated respiration impedance measurement, making it suitable for ECG systems that acquire cardiac and respiratory signals simultaneously.

Pin-to-Pin Hardware and Software Compatibility

GX1294 provides pin-to-pin hardware compatibility with ADS1294 and ADS1294R. Existing analog connections, clock and reference circuits, control signals, SPI interface and power architecture can continue to be used.

Software compatibility allows existing MCU, DSP or FPGA register configuration, data-reading routines and system-control software to be retained. Daisy-chain operation also supports multidevice systems requiring additional acquisition channels.

The GX1294 family provides QFP-64 and BGA-64 package options. GX1294R with integrated respiration measurement is available in a compact 8 mm × 8 mm, 64-ball BGA package.

GX1294 vs ADS1294 and ADS1294R

GX1294 maintains the core conversion, ECG monitoring and respiration-measurement functions required by ADS1294 and ADS1294R systems.

Integrated ECG Monitoring and Diagnostic Functions

The input multiplexer can route different internal and external signals to the ADC channels for offset testing, temperature monitoring, power-supply measurement and channel testing. These functions support system diagnostics and operating-condition monitoring.

GX1294 also includes pull-up and pull-down resistors, excitation current sources and sinks, and AC lead-off detection. Integrated pace-detection amplifiers support hardware pacemaker detection, while the 32 kSPS data rate enables software-based pace detection.

Key GX1294 features include:

l Four simultaneous-sampling 24-bit ADC channels

l Output data rates up to 32 kSPS

l Integrated programmable gain amplifiers

l Internal reference and oscillator

l Right-leg drive

l DC and AC lead-off detection

l Hardware and software pacemaker detection

l WCT and GCT generation

l Respiration impedance measurement

l Offset, temperature, supply and channel testing

l SPI interface and daisy-chain operation

l 8 mm × 8 mm BGA-64 package

Applications

GX1294 is suitable for:

l High-precision ECG, EEG and EMG acquisition

l Patient-monitoring systems

l Holter and ambulatory ECG monitors

l Event and stress monitoring

l Vital-sign monitoring equipment

l AED and telemedicine equipment

l Sleep-monitoring systems

l Respiration impedance measurement

Request the GX1294 Datasheet and Samples

GXSC can provide the GX1294 datasheet, samples, quotation, stable supply and technical support for ADS1294 and ADS1294R replacement projects and new medical signal-acquisition designs.

Contact GXSC to discuss your ADS1294, ADS1294R or GX1294 product requirements.