GXSC Monitor Replaces LTC2991 for Multi-Parameter Monitoring in Intelligent Control Systems

An intelligent control system is a system that integrates computer technology, control theory, and artificial intelligence. It can not only process real-time system data but also autonomously adjust control strategies based on environmental changes and system status. Compared to traditional linear control systems, intelligent control systems offer greater adaptability.

The basic components of an intelligent control system include sensors, controllers, actuators, and communication modules. The sensor module enables real-time, precise monitoring of critical system parameters, efficient data transmission, and dynamic closed-loop control. The parameter monitoring process must meet requirements for multi-channel capability, high precision, low latency, and ease of integration. It must simultaneously collect various critical parameters such as voltage, current, and temperature while ensuring data accuracy and stability, thereby providing a reliable basis for subsequent control decisions.

GXSC’s 8-channel voltage, current, and temperature monitoring chip has replaced the LTC2991 and is widely used in data centers and intelligent control systems operating in various harsh environments, providing customized monitoring and protection solutions for different scenarios. The chip offers a single-ended voltage resolution as low as 305.18 μV, a differential voltage resolution as low as 19.075 μV, and a temperature resolution as low as 0.0625°C. Within the operating temperature range of -40°C to 125°C, the voltage measurement accuracy is better than 0.25%, the current measurement accuracy is better than 0.75%, and the temperature measurement accuracy is better than 1.8°C, making it highly suitable for single or mixed system applications involving voltage, current, and temperature.

The GXSC monitor chip supports both 8-channel single-ended voltage and 4-channel differential voltage input modes, enabling voltage measurement, current measurement, or remote BJT temperature measurement. It features a standard I²C two-wire interface and supports the standard I²C protocol, with 3 hardware-selectable address bits allowing for expansion to a maximum of 8 chips. Additionally, it integrates a temperature sensor and a voltage sensor to monitor the chip’s own operating temperature and operating voltage.

The advantages of the GXSC monitor are as follows:

 Compact size, low power consumption, and a built-in 14-bit ADC

 High sensitivity, with a temperature resolution of 0.06°C, single-ended voltage resolution of 305 μV, and differential voltage resolution of 19 μV

 Built-in shunt resistance compensation for remote current and temperature measurement modes

 Supports PWM output proportional to the temperature of a remote BJT, for controlling fans or heaters

Configurable I²C addresses, supporting up to 8 devices on a shared bus

Operating modes for each monitoring channel can be configured independently; a single device can simultaneously measure voltage, current, and temperature

Available in a 16-pin MSOP package, with an operating temperature range of -55°C to 125°C

 Supports access via the IC interface by controllers such as FPGAs, MCUs, or DSPs

Compared to other solutions, the GXSC monitor integrates a high-precision reference with a temperature drift of 10 ppm/°C. This eliminates the need for an external reference, reducing the number of components required for engineering applications, lowering material costs, minimizing PCB footprint, and improving board integration. It also supports PWM signal output based on BJT temperature sensing via the V7 and V8 channels. Depending on engineering requirements, this PWM output signal can be used to control fan speed or heater power.