ADS1296/ADS1296R Replacement: GX1296R Pin-Compatible 6-Channel ECG AFE

GX1296 and GX1296R are six-channel analog front ends designed for high-precision ECG, EEG and EMG signal acquisition. All six channels support simultaneous sampling with output data rates up to 32 kSPS.

The devices integrate PGAs, an internal low-drift reference and a configurable oscillator, reducing the external circuitry required for medical monitoring equipment. Integrated right-leg drive, lead-off detection, pacemaker detection and WCT/GCT functions further simplify ECG system design.

GX1296 provides a direct replacement for ADS1296, while GX1296R replaces ADS1296R and adds integrated respiration impedance measurement.

GX1296/GX1296R as Direct ADS1296/ADS1296R Replacements

GX1296 and GX1296R retain the six-channel, 24-bit simultaneous-sampling architecture and SPI communication method used in ADS1296 and ADS1296R systems.

Compatible pin definitions, packages, analog inputs, reference connections and digital interfaces allow existing designs to retain their schematic, PCB and MCU, DSP or FPGA software. The devices also support daisy-chain operation for medical systems requiring additional acquisition channels.

GX1296R integrates the respiration measurement function required by patient monitors, vital-sign equipment and sleep-monitoring systems.

Pin-to-Pin Hardware and Software Compatibility

GX1296 and GX1296R are designed for pin-to-pin hardware compatibility with their corresponding ADS1296 and ADS1296R devices. Existing electrode connections, clock and reference circuits, control signals and SPI interfaces can be retained.

Software compatibility allows the existing register configuration, channel-control logic and data-acquisition programs to continue operating. This helps reduce PCB redesign, firmware migration and replacement verification work.

GX1296 is available in 10 mm × 10 mm QFP-64 and 8 mm × 8 mm BGA-64 packages. The respiration-enabled GX1296R is supplied in an 8 mm × 8 mm BGA-64 package. Both versions operate from −40°C to +85°C.

GX1296/GX1296R vs ADS1296/ADS1296R

ECG Acquisition, Diagnostics and Respiration Measurement

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

The multiplexer can also select the common-mode level from any input channel to generate the right-leg drive signal. Pull-up and pull-down resistors, excitation current sources and AC lead-off detection provide flexible electrode-connection monitoring.

Key features include:

l Six simultaneous-sampling 24-bit delta-sigma ADC channels

l Output data rates up to 32 kSPS

l Integrated programmable gain amplifiers

l Internal reference and oscillator

l 1.65 V to 5.25 V supply support

l SPI data interface

l Right-leg drive

l DC and AC lead-off detection

l Hardware and software pacemaker detection

l Integrated WCT and GCT

l Daisy-chain operation

l Respiration impedance measurement on GX1296R

Medical Monitoring Applications

GX1296 and GX1296R are 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 GX1296/GX1296R Datasheets and Samples

GXSC provides GX1296 and GX1296R samples, datasheets, compatibility verification and technical support for ADS1296 and ADS1296R replacement projects.

Contact GXSC for product selection, samples, quotations or technical support for new ECG and patient-monitoring designs.