MCP3909-I/SS Microchip

MCP3909 Energy Metering IC with SPI Interface and Active Power Pulse Output Features Description The MCP3909 device is an energy-metering IC Supports IEC 62053 International Energy designed to support the IEC 62053 international meter- Metering Specification ing standard specification. It supplies a frequency out- Digital Waveform Data Access Through SPI put proportional to the average active real power, with Interface simultaneous serial access to ADC channels and mul- - 16-bit Dual ADC Output Data Words tiplier output data. This output waveform data is avail- - 20-bit Multiplier Output Data Word able at up to 14 kHz with 16-bit ADC output and 20-bit Dual Functionality Pins Support Serial Interface multiplier output words. The 16-bit, delta-sigma ADCs Access and Simultaneous Active Power Pulse allow for a wide range of I and I currents and/or B MAX Output small shunt (<200 Ohms) meter designs. A no-load threshold block prevents any current creep measure- Two 16-bit Second Order Delta-sigma Analog- to-Digital Converters (ADCs) with Multi-bit DAC ments for the active power pulse outputs. Theintegrated on-chip voltage reference has an - 81 dB SINAD (typical) on Both Channels ultra-low temperature drift of 15 ppm per degree C. 0.1% Typical Active Energy Measurement Error This accurate energy metering IC with high field reli- Over 1000:1 Dynamic Range ability is available in the industry standard 24-lead PGA for Small Signal Input Supports Low Value SSOP pinout. Shunt Current Sensor Package Type Ultra-low Drift On-chip Reference,15 ppm/C (typical) 24-Lead Direct Drive for Electromagnetic Mechanical SSOP 1 24 DV F Counter and Two-phase Stepper Motors DD OUT0 2 23 HPF F OUT1 Low I of 4 mA (maximum) DD AV 3 22 HF DD OUT Tamper Output Pin for Negative Power Indication NC 4 21 D GND CH0+ 5 20 NEG/SDO Temperature Ranges: CH0- 6 19 NC - Industrial: -40C to +85C CH1- CLKOUT 7 18 - Extended: -40C to +125C CH1+ CLKIN 8 17 MCLR9G160 REFIN/OUT G1 10 15 A 11 14 F0/CS GND F2/SCK 12 13 F1/SDI 2006-2012 Microchip Technology Inc. DS22025C-page 1MCP3909 Functional Block Diagram G0 G1 HPF F2/SCK F1/SDI F0/CS NEG/SDO 16 CH0+ + 16-bit PGA Multi-level HPF1 CH0- ADC 16 Dual Functionality Pin 4k MCLR Control Serial Control REFIN/OUT And Output SPI 2.4V Buffers Interface 16 Reference 16 CH1+ + 16-bit Multi-level HPF1 F F OUT0 OUT1 CH1- HF ADC OUT 20 Clock Sub-system Stepper Motor Active Power DTF Output Drive LPF1 X conversion for Active Power OSC1 OSC2 DS22025C-page 2 2006-2012 Microchip Technology Inc.