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MCP3905L
Mixed Signal - Energy Measurement - Microcontrollers and Processors

热度 89

The MCP3905L is an energy measurement IC supporting the IEC 62053 international energy metering specification. The output of the device includes a frequency proportional to the average active (real) power at the inputs as well as a higher frequency output proportional to the instantaneous power for meter calibration. The MCP3905L incorporates two 16-bit delta-sigma ADCs with a progammable gain up to 16, which enable small shunt meter designs for measuring a wide range of Ib and Imax currents. The integrated on-chip voltage reference has ultra-low temperature drift of 15 ppm per degree C. Also on-chip is a fixed-function DSP for active (real) power calculation. The MCP3905L offers reduced pulse width of calibration output frequency and mechanical counter drive for low power meter designs.


  • Supplies active (real) power measurement for single-phase, residential energy metering
  • Supports IEC 62053 International Energy Metering Specification and legacy IEC 1036/61036/687 Specifications
  • 16-bit, Delta-Sigma Analog-to-Digital Converters (ADCs)
  • Reduced pulse-width of calibration output frequency and mechanical counter drive for low power meter designs (MCP3905L)
  • Increased output frequency constant options for meter design (MCP3905L)
  • 0.1% typical measurement error over 500:1 dynamic range (MCP3905A / MCP3905L)
  • Programmable Gain Amplifier (PGA) for small signal inputs supports low value shunt current sensor
  • Ultra-low drift on-chip reference: 15 ppm/°C (typical)
  • Direct drive for electromagnetic mechanical counter and two-phase stepper motors
NameValue
Measurement Error0.1%
Dynamic Range500:1
Gain Selection1:16
Voltage Reference Drift Typical (ppm/°C)15
PSRR % typ0.01%
ADC Resolution (bits)16
# of Channels2
Power TypeSingle-Phase
Device TypeEnergy Meter IC
InterfacePulse Output
Operating Voltage (V)4.5 - 5.5
Temperature Range (°C)-40 to 125

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