AD7124-8 Replacement: GX7124 Pin-to-Pin 24-Bit Precision ADC

GX7124 is designed for precision temperature, pressure, bridge-sensor and industrial process measurements requiring low noise, flexible input configuration and high signal-chain integration.

The device supports output data rates from 1.17 SPS to 19.2 kSPS. Its single-cycle-settling digital filter enables rapid switching between multiplexed input channels, while simultaneous 50 Hz and 60 Hz rejection at 25 SPS helps suppress power-line interference.

GX7124 is supplied in a 5 mm × 5 mm QFN-32 package designed for pin-to-pin replacement of AD7124-8. The shared footprint and pin arrangement support migration of existing hardware designs operating within the GX7124 power-supply requirements.

GX7124 as a Pin-to-Pin AD7124-8 Replacement

GX7124 combines a 24-bit delta-sigma ADC with a flexible input multiplexer supporting up to 16 single-ended or eight differential analog inputs.

The integrated low-noise PGA provides selectable gains up to 128 V/V, allowing small sensor signals to be measured without requiring a separate high-gain external amplifier. This makes the device suitable for thermocouples, thermistors, RTDs, resistive bridges and other low-level sensor signals.

For AD7124-8 replacement projects, the GX7124 QFN32 package provides a pin-compatible hardware migration path. It can also be used in new precision sensor acquisition and industrial instrumentation designs.

Pin-Compatible QFN32 Hardware and SPI Interface

GX7124 uses a 32-pin QFN package measuring 5 mm × 5 mm and is designed around the AD7124-8 package and pin configuration.

The device integrates the analog-input multiplexer, PGA, reference connections, excitation-current outputs, sensor-diagnostic functions, general-purpose digital I/Os and SPI communication interface required by precision sensor systems.

GX7124 supports 2.7 V to 5.25 V analog and digital supplies, together with a ±2.5 V bipolar analog-supply configuration. Existing AD7124-8 systems using supplies within the GX7124 operating range can retain the original QFN32 footprint and signal routing.

GX7124 vs AD7124-8: Key Specification Comparison

GX7124 retains the principal resolution, sampling-rate range, PGA capability, package footprint and integrated sensor-measurement functions required by AD7124-8 applications. It also provides 16 single-ended inputs and supports analog and digital supplies up to 5.25 V.

Integrated Sensor Measurement Features

Key GX7124 features include:

l Precision 24-bit delta-sigma ADC

l 16 single-ended or eight differential analog inputs

l Low-noise PGA with selectable gains up to 128 V/V

l Output data rates from 1.17 SPS to 19.2 kSPS

l Single-cycle-settling digital filter

l Simultaneous 50 Hz and 60 Hz rejection at 25 SPS

l Integrated low-drift voltage reference

l Internal oscillator

l Two matched programmable excitation-current sources

l Sensor burn-out detection

l Thermocouple bias voltage

l Power-supply and system monitoring

l Four general-purpose digital I/Os

l SPI data interface

l 2.7 V to 5.25 V analog and digital supplies

l ±2.5 V bipolar analog-supply operation

l 5 mm × 5 mm QFN-32 package

l −40°C to +125°C operating-temperature range

GX7124 Applications

GX7124 is suitable for:

l RTD temperature measurement

l Thermocouple measurement

l Thermistor measurement

l Pressure measurement systems

l Resistive bridge sensors

l Factory automation

l Industrial process control

l Precision instrumentation

l Multichannel sensor acquisition systems

Request the GX7124 Datasheet, Samples and Technical Support

GXSC can provide the GX7124 datasheet, QFN32 pinout information, samples, quotation and technical support for AD7124-8 replacement projects and new precision sensor-measurement designs.

Contact GXSC with your AD7124-8 ordering code, supply configuration, sensor type, required gain and output data rate to obtain product-selection and replacement support.