Product category:
Analogue and Mixed Signal ICs
News Release from: Microchip Technology | Subject: MCP3905 and MCP3906
Edited by the Electronicstalk Editorial
Team on 24 October 2005
Meter chips master power measurement
The MCP3905 and MCP3906 are fully functional stand-alone energy-measurement ICs that output average and instantaneous real power.
New from Microchip, the MCP3905 and MCP3906 are fully functional stand-alone energy-measurement ICs that output average and instantaneous real power These analogue front ends can be paired with a PIC microcontroller to provide a complete, highly accurate solution for single-phase electronic energy measurement in residential power meters and industrial applications
This article was originally published on Electronicstalk on 10 Apr 2001 at 8.00am (UK)
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The MCP3905 and MCP3906 each integrate two 16bit delta-sigma analogue-to-digital converters (ADCs), an internal voltage reference, and all of the digital circuitry needed to calculate average and instantaneous real power.
The MCP3905 features a programmable gain amplifier (PGA) with a maximum gain of 16, whereas for higher accuracy applications the MCP3906 has a maximum gain of 32.
Both devices can meet or exceed the requirements of the IEC62053 energy-metering specifications.
The new ICs provide high accuracy, with a 0.1% typical measurement error over a 500:1 dynamic range for the MCP3905 or a 1000:1 dynamic range for the MCP3906.
A low-drift, on-chip voltage reference ensures that measurements do not change during the life of the meter.
The devices have a low current consumption of just 4mA, support direct drive for both mechanical counters and two-phase stepper motors, include a tamper output pin for negative power indication, and operate over a temperature range of -40 to +85C.
To support energy-meter application development, Microchip offers the MCP3905 energy meter reference design board (MCP3905RD-PM1) and the MCP3905 energy meter evaluation board (MCP3905EV).
Both boards are available today.
Microchip has also launched a new online utility meter design centre as part of its main website, which provides engineers with all of the technical tools and resources needed to create accurate, reliable and low-cost utility metering applications, including energy, water, gas and heat meters.
The MCP3905 and MCP3906 are available for general sampling and volume production today.
All device packaging is lead (Pb) free.
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