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Analog Solutions for Power Metering Applications

Measure Current and Voltage Using AFE Devices and High-Accuracy Temperature Sensors

A traditional metering system consists of a multichannel supervisory section, a data acquisition (SCADA) section and a fault-detection/protection section. EU standards, such as EN 50160, IEC 62053 and IEC 61850, dictate the minimum accuracy and sample rate needed for modern multichannel ADC systems used in power system monitoring and metering. SCADA systems require robust multichannel high-resolution simultaneous sampling ADCs. Our MCP391x AFE devices are a great fit for the I/V monitoring required by these types of applications. 

Featured Products for Power Metering

Our MCP3912, MCP3913 and MCP3914 I/V metering AFE ADCs are excellent options for power monitoring, utility metering, factory automation and process control, energy measurement and medical instruments. They offer exceptional performance, high resolution and SNR and feature programmable data rates up to 125 ksps.

MCP3912

  • Simultaneous sampling of four channels
Explore MCP3912

MCP3913

  •  Simultaneous sampling of six channels
Explore MCP3913

MCP3914

  • Simultaneous sampling of eight channels
Explore MCP3914
Featured

AT30TSE758A Temperature Sensor

Our AT30TSE758A temperature sensor is a great option for utility metering, home appliances, medical instruments, test equipment, portable equipment and power regulators. This temperature sensor offers the following features:

  • Ultra-small packaging option: 2 × 3 × 0.6-mm UDFN
  • Wide Vcc range: 1.7V to 5.5V
  • Low power consumption (typ./max):  60 uA/75 uA

Block Diagrams

This diagram shows how you can use our AFE and temperature sensor for single/poly shunt phase electricity metering and temperature measurements. In the case of a shunt measurement, isolation is required to eliminate the noise going into the microcontroller (MCU). The resistive shunt measurements do not have the inherent electrical isolation of the Current Transformer (CT) measurement method, so in applications that require isolation, a digital isolator should be placed before the MCU to provide noise isolation.

This diagram shows how you can use our AFE and temperature sensor to offer single/poly CT electricity metering and temperature measurements. Traditionally, a CT provides inherent isolation, eliminating the need for digital isolation. However, the CT must be DC tolerant to avoid being saturated, which increases the overall system cost.