High integration AFE GX4114/5 replaces AD4114/5 for analog signal acquisition in rail transit and engineering vehicles

The operational safety and efficiency of rail transit and engineering vehicles depend on the precise monitoring of key analog signals. These devices need to collect real-time signals such as temperature (such as motor winding temperature, brake pad temperature), pressure, vibration, current and voltage, and maintain high accuracy and reliability in harsh environments such as strong electromagnetic interference, wide temperature fluctuations, and severe vibrations. The GXSC high integration AFE GX4114/5, with its wide input range, high anti-interference ability, and industrial grade reliability, can replace ADI‘s AD4114/5 as an analog signal acquisition solution for such applications.

Signal acquisition requirements for rail transit and engineering vehicles:

Multi parameter and multi-channel synchronous monitoring

Wide temperature range and strong anti-interference ability

High reliability and diagnostic function

The highly integrated AFE GX4114/5 is a 0.1% uncalibrated measurement chip that supports ± 10V and 0-20mA, with a single power supply ± 40V input, 8/16 channels, and 125kSPS low-noise 24 bit delta type analog front-end. Modern rail transit/engineering vehicles are widely used and operate frequently. The GX4114/5 integrates 8 fully differential or 16 single ended analog front ends (AFEs), as well as key analog and digital signal conditioning modules. Each analog input channel can be configured with 8 independent settings, supporting ± 10V and 0-20mA 0.1% uncalibrated measurements. The GX4114/5 can accurately and efficiently collect various analog signals to ensure stable vehicle operation and achieve precise control.

The application characteristics of GX4114/5 are introduced as follows:

• Effective resolution: 17.9bits@62.5kSPS

Overall no calibration error: 0.07%

Offset as low as 0.5mV

• High communication PSRR: 50dB@50Hz ~100kHz

• High integration: Integrated internal benchmark: temperature drift 6ppm/℃ (Typ.), precision voltage divider resistor, integrated 2 ℃ high-precision temperature sensor

• Supports 50/60Hz simultaneous suppression

• Support SPI CRC verification

• Wire breakage detection: After input wire breakage, output returns to zero

• Higher ESD/temperature rating: 2000V/1250V HBM/CDM

Digital power supply: 2.7V~5.5V; Simulated power supply: 4.5V~5.5V

• Packaging: 6.0mm × 6.0mm QFN (40pin)

• Operating temperature range: -40 ° C to+125 ° C