GXSC 8-channel 18 bit 200kSPS synchronous sampling analog-to-digital converter GX7608 replaces AD7608 for application in photovoltaic inverters

In new energy generation, photovoltaic inverters are devices that connect photovoltaic arrays to the grid, converting the direct current generated by photovoltaic modules into alternating current, achieving maximum power point tracking (MPPT), and ensuring stable grid connection of electrical energy. The precise acquisition of signals from photovoltaic inverters determines the power generation efficiency and grid connection safety of photovoltaic systems. This article recommends the 8-channel 18 bit 200kSPS synchronous sampling analog-to-digital converter GX7608, which has 8 built-in 18 bit fast, low-power successive approximation ADCs. GX7608 directly replaces AD7608 in terms of performance.

GX7608 has a conversion rate of up to 200kSPS per channel. The chip only uses a 5V power supply to support the conversion of true bipolar input signals of ± 10V and ± 5V. In order to simplify the PCB design of the data acquisition system, GX7608 is equipped with an input buffer with a 1M Ω input impedance and an anti aliasing filter for direct acquisition of analog signals.

In addition, GX7608 also integrates a high-precision reference voltage generator and buffer that can be flexibly configured. Supports parallel mode or serial mode, configured through different connection modes of hardware pins, creating multiple connection conditions for the interface connection between devices and microprocessors or DSPs.

The characteristics of GX7608 are as follows:

True bipolar analog input

Input signal range: ± 10V, ± 5V

• Conversion rate: 200kSPS

Low power consumption: 120mW (internal reference, 200kSPS, 5V power supply)

• On chip reference voltage source and buffer

Parallel and serial interface modes

• High speed serial interface compatible with SPI interface protocol

64 pin LQFP package

• Working temperature: -40 ℃~+125 ℃