The GXSC analog-to-digital converter GX7609 is comparable to the AD7609 and is applied in multi-axis positioning systems

In fields such as industrial automation, precision manufacturing, and robotics, multi-axis positioning systems are essential equipment for achieving "precise displacement control." From multi-axis联动加工 in CNC machine tools to the coordinated movement of industrial robot joints, their positioning accuracy directly determines product quality and production efficiency. The core operational logic of multi-axis positioning systems involves real-time data collection from multiple sensors for each axis‘s position, speed, and attitude, which is then processed by a controller to drive actuators in adjusting motion states. The data acquisition phase requires a high-performance analog-to-digital converter to achieve this.

The 8-channel 18-bit synchronous sampling analog-to-digital converter (ADC) GX7609 from GXSC can replace the AD7609 for applications in multi-axis positioning systems. This chip features an ADC conversion rate of up to 200kSPS per channel, with an 8-channel design that directly covers multi-axis systems such as six-axis robots and four-axis CNC machine tools, ensuring inter-axis coordination accuracy. The GX7609 operates on a single 5V power supply and supports the conversion of true bipolar differential input signals ranging from ±20V to ±10V.

To simplify the PCB design of the data acquisition system, the GX7609 incorporates an input buffer with a 1MΩ input impedance and an anti-aliasing filter for direct analog signal acquisition. It also features a highly configurable high-precision reference voltage generator and buffer. The chip supports both parallel and serial modes, which can be configured via different hardware pin connection schemes, creating multiple interface conditions for connecting the device with FPGAs, microprocessors, or DSPs.

Product Advantages of GX7609:

Product dimensions, pinout, functionality, and timing are compatible with the reference product, supporting Pin-to-Pin in-place replacement of the AD7609

Single 5V power supply, true bipolar differential analog input

Lower bipolar zero-level error, lower positive and negative full-scale error

Higher channel isolation

ENOB: 14.9 Bits (Typical Value)

SNR: 91.8 dB (typical value)

SINAD: 91.5 dB (typical value)

SFDR: -110dB (typical)

INL: ±2.5 LSB (typical)

DNL: ±0.75 LSB (typical)

Operating power consumption: 120mW (internal reference)

Operating temperature: -55°C to +125°C