GXSC GX7689 (Replace AD7689) for Industrial CPU Motherboards

A wide variety of signals need to be captured and transmitted in equipment in the industrial field, so in electronic design, we always see electronic components such as ADCs, DACs, and op-amps, in which the capture channel for analog to digital signal conversion and the sampling rate are very important parameters that are taken into consideration by engineers.

The GX7689 is an 8-channel, 16-bit charge redistribution successive approximation register (SAR)-type analog-to-digital converter (ADC) with a single power supply. The GX7689 has all of the components needed for a multi-channel, low-power data acquisition system, including: a true 16-bit SAR ADC with no loss of coding; 8-channel, low-crosstalk multiplexer for configuring inputs as single-ended, differential, unipolar, or bipolar; and an 8-channel, low-dropout multiplexer. crosstalk multiplexer; an internal low-temperature-drift bandgap reference (2.5V or 4.096V selectable) and buffer; a temperature sensor; selectable unipolar filters; and a sequencer useful when multiple channels are sampled sequentially.

The GX7689 uses a simple SPI-compatible interface for writing configuration registers and reading conversion results. The digital interface uses a separate power supply (VIO) that is set to logic levels. The power consumption is proportional to the sample rate and the GX7689 operates over a temperature range of -40°C to +85°C. The GX7689 is available with the optional GXSC GXD710 and GXD710.

Selecting the GXSC GXD7689 (instead of the AD7689) offers the following advantages:

- Small QFN20 package saves PCB design area and cost;

- 16-bit resolution for more accurate and lossless data;

- Integration of 8-channel multiplexer, and has a 250kSps sampling rate, faster sampling speed, more efficient data transmission; - integration of on-chip high-precision voltage references, temperature sensors, the user can choose a wider range of design options, more complete;

- Power consumption parameters of 13.0mW @ 5V, standby current 50nA, can make the device lower power consumption, longer life;

- Can be a perfect replacement for ADI‘s AD7689.