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Sensor IC-MS1990

Product Overview:

The MS1990 is a monitoring device designed for measuring temperature, voltage, and current in PCB systems. Through an I²C serial interface, it can independently measure four single-ended voltage inputs, or be configured as two differential pairs for current or remote BJT-based temperature sensing. The device also supports on-chip temperature measurement and VCC monitoring.

An integrated 10 ppm/°C precision reference minimizes the need for external components and reduces PCB footprint. With configurable I²C addresses and feature options, the MS1990 is highly adaptable to a variety of applications requiring voltage, current, or temperature monitoring.

It is well-suited for systems that demand sub-millivolt voltage resolution, 1% current measurement accuracy, ±3.5°C temperature accuracy, or any combination of these requirements.

The MS1990 is available in a 10-pin MSOP package, operates over a –40°C to +125°C temperature range, and can interface directly with FPGAs, MCUs, or DSPs via the I²C bus.

  • Product Details

Functional Block Diagram

Product Highlights:

Key Features:

  • Compact size and low power consumption, with integrated 14-bit Σ-Δ ADC
  • High sensitivity:

— Temperature resolution: 0.06°C

— Single-ended voltage resolution: 305 μV

— Differential voltage resolution: 19 μV

  • Built-in series resistance cancellation for remote current and temperature sensing modes
  • Configurable I²C address, with up to 4 devices supported on a shared I²C bus
  • Independently configurable monitor channels, enabling a single MS1990 to simultaneously measure voltage, current, and temperature

Applications:

  • Temperature Measurement
  • Supply Voltage Monitoring
  • Current Measurement
  • Remote Data Acquisition
  • Environmental Monitoring
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