MCP3909_12 Datasheet, PDF (1/44 Pages) Microchip Technology – Energy Metering IC with SPI Interface and Active Power Pulse Output

MCP3909
Energy Metering IC with SPI Interface and Active Power Pulse Output
Features
• 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 Analog-
to-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/°C
(typical)
• Direct Drive for Electromagnetic Mechanical
Counter and Two-phase Stepper Motors
• Low I_DD of 4 mA (maximum)
• Tamper Output Pin for Negative Power Indication
• Temperature Ranges:
- Industrial: -40°C to +85°C
- Extended: -40°C to +125°C
Description
The MCP3909 device is an energy-metering IC
designed to support the IEC 62053 international meter-
ing standard specification. It supplies a frequency out-
put proportional to the average active real power, with
simultaneous serial access to ADC channels and mul-
tiplier output data. This output waveform data is avail-
able 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 I_B and I_MAX currents and/or
small shunt (<200 µOhms) meter designs. A no-load
threshold block prevents any current creep measure-
ments for the active power pulse outputs.
The integrated on-chip voltage reference has an
ultra-low temperature drift of 15 ppm per degree C.
This accurate energy metering IC with high field reli-
ability is available in the industry standard 24-lead
SSOP pinout.
Package Type
24-Lead
SSOP
DV_DD 1
HPF 2
AV_DD 3
NC 4
CH0+ 5
CH0- 6
CH1- 7
CH1+ 8
MCLR 9
REFIN/OUT 10
A_GND 11
F2/SCK 12
24 F_OUT0
23 F_OUT1
22 HF_OUT
21 D_GND
20 NEG/SDO
19 NC
18 CLKOUT
17 CLKIN
16 G0
15 G1
14 F0/CS
13 F1/SDI
 2006-2012 Microchip Technology Inc.
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