Datasheet Microchip MCP3909T-E/SS

MCP3909
Energy Metering IC with SPI Interface and Active Power Pulse Output
Features Description Supports IEC 62053 International Energy
Metering Specification Digital Waveform Data Access Through SPI
Interface
-16-bit Dual ADC Output Data Words
-20-bit Multiplier Output Data Word Dual Functionality Pins Support Serial Interface
Access and Simultaneous Active Power Pulse
Output Two 16-bit Second Order Delta-sigma Analogto-Digital Converters (ADCs) with Multi-bit DAC
-81 dB SINAD (typical) on Both Channels 0.1% Typical Active Energy Measurement Error
Over 1000:1 Dynamic Range PGA for Small Signal Input Supports Low Value
Shunt Current Sensor Ultra-low Drift On-chip Reference,15 ppm/В°C
(typical) Direct Drive for Electromagnetic Mechanical
Counter and Two-phase Stepper Motors Low IDD of 4 mA (maximum) Tamper Output Pin for Negative Power Indication Temperature Ranges:
-Industrial: -40В°C to +85В°C
-Extended: -40В°C to +125В°C The MCP3909 device is an energy-metering IC
designed to support the IEC 62053 international metering standard specification. It supplies a frequency output proportional to the average active real power, with
simultaneous serial access to ADC channels and multiplier output data. This output waveform data is available at up to 14 kHz with 16-bit ADC output and 20-bit
multiplier output words. The 16-bit, delta-sigma ADCs
allow for a wide range of IB and IMAX currents and/or
small shunt (<200 ВµOhms) meter designs. A no-load
threshold block prevents any current creep measurements for the active power pulse outputs.
The integrated on-chip voltage reference has an …