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Energy Meters
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Block Diagram
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Explore the blocks in the diagram above to learn more…
The list below shows a selection of the most commonly used PIC microcontrollers for energy metering applications. The most recently introduced devices and devices with integrated LCD display are featured at the top.
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Recommended 8-bit PIC® Microcontrollers
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Device
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Flash
Program
(bytes)
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Data Memory
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I/O
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10-bit
ADC
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12-bit
ADC
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Capture
Compare
PWM
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MSSP
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Timers
8/16 bit
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LCD
Segments
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RAM
(bytes)
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EEPROM
(bytes)
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SPI™
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MI²C
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PIC18F86J72
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65,536
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4096
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-
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51
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12
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2
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1
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1
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4
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4x33(132)
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PIC18F87J72
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131,072
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4096
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-
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51
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12
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2
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1
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1
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4
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4x33(132)
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PIC18F87J93
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131,072
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4096
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67
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16
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2
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1
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1
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1/3
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4x48(192)
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PIC18F87J90
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131,072
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4096
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67
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12
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-
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2
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1
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1
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1/3
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4x48(192)
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PIC18F85J90
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32,768
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2048
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-
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67
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12
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-
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2
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1
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1
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1/3
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4x48(192)
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PIC18F65J90
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32,768
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2048
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-
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51
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12
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-
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2
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1
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1
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1/3
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4x33(132)
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PIC16F946
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14,336
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336
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256
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53
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8
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-
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2
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1
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-
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2/1
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4x42(168)
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PIC16F917
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14,336
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352
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256
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36
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8
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-
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1
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1
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-
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2/1
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4x24(96)
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PIC16F916
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14,336
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352
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256
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25
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5
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-
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2
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1
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-
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2/1
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4x15(60)
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PIC16F877A
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14,336
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368
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256
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33
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8
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-
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2
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1
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-
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1/2
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-
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PIC16F876A
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14,336
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368
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256
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22
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5
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-
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2
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1
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-
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2/1
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-
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PIC16F77
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14,336
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368
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-
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33
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8x8 bits
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-
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2
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1
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-
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2/1
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-
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PIC16F76
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14,336
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368
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-
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22
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5x8 bits
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-
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2
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1
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-
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2/1
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-
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PIC16F72
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3,584
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128
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-
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22
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5x8 bits
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-
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1
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1
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-
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2/1
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-
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PIC16F690
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8,192
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256
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256
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18
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12
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-
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1
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1
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1
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2/1
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-
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PIC16F648A
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7,168
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256
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256
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16
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-
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-
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1
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-
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-
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2/1
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-
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Recommended 16-bit PIC® Microcontrollers
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Device
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Flash
Program
(bytes)
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Data Memory
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I/O
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12-bit
ADC
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Capture
Compare
PWM
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MSSP
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Timers
8/16 bit
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LCD
Segments
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RAM
(bytes)
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EEPROM
(bytes)
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SPI™
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MI²C
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PIC24FJ128GA010
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128K
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8192
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-
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86
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16
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5
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2
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1
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0/5
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-
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PIC24FJ64GA004
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64K
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8192
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-
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35
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10
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5
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2
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1
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0/5
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-
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Recommended dsPIC® Digital Signal Controllers (DSC)
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Device
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Flash
Program
(bytes)
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Data Memory
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I/O
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12-bit
ADC
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Capture
Compare
PWM
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MSSP
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Timers
8/16 bit
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LCD
Segments
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RAM
(bytes)
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EEPROM
(bytes)
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SPI™
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MI²C
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dsPIC30F3012
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24K
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2048
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1024
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12
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8
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2
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1
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1
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0/3
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-
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Recommended Analog Products:
Energy Measurement ICs
Device
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Measurement Error
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Dynamic Range
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Interface
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Vref Drift
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Active Power Calculation Block
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Analog VDD
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Temp Range
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Packages
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MCP3901
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91 dB SINAD
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24-bit
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SPI
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15ppm
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No
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4.5-5.5V
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-40 to +125°C
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20-SSOP, 20-QFN
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MCP3903
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91 dB SINAD
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24-bit
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SPI
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5ppm
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No
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4.5-5.5V
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-40 to +125°C
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28-SSOP
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MCP3905A
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0.1%
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500:1
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Pulse Output
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15ppm
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Yes
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4.5-5.5V
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-40 to +125°C
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24-SSOP
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MCP3906A
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0.1%
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1000:1
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Pulse Output
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15ppm
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Yes
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4.5-5.5V
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-40 to +125°C
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24-SSOP
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MCP3909
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0.1%
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1000:1
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SPI, Pulse Output
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15ppm
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Yes
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4.5-5.5V
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-40 to +125°C
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24-SSOP
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Op Amps
Device
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# per package
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GBWP (kHz)
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Iq Max. (µA)
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Vos Max. (µV)
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Rail to Rail
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Supply Voltage
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Temp Range
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Packages
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MCP6142
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2
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100
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1
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3000
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In/Out
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4.5-5.5V
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-40 to +125°C
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PDIP, SOIC, MSOP
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MCP6022
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2
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10000
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1350
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250
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In/Out
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2.5-5.5V
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-40 to +125°C
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PDIP, SOIC, TSSOP
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MCP602
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2
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2800
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325
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2000
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In
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2.7-6.0V
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-40 to +125°C
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PDIP, SOIC, TSSOP
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Temperature Sensors
Device
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Typical Accuracy
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Max Accuracy @25°C
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Resolution
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Interface
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Supply Voltage
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Temp Range
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Packages
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TCN75A
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0.5°C
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1°C
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9-12
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I2C
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2.7-5.5V
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-40 to +125°C
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5-SOT23, 5-TO220
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TC77
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0.5°C
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3°C
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12
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SPI
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2.7-5.5V
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-55 to +125°C
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8-SOIC, 8-MSOP
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Development Tools:
MCP3909 – 3-Phase Energy Meter Reference Design
MCP3905A – Energy Meter Evaluation Board
MCP3905A – Reference Design
List of relevant application notes:
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Application Notes
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Category
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Document
Number
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Title
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Meter
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AN994
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IEC Compliant Active-Energy Meter Design Using the MCP3905A/06A
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AN939
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Designing Energy Meters with the PIC16F873A
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Communications
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AN979
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Interfacing an I2C™ Serial EEPROM to a PIC18 Device
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Display
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AN948
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Microcontrollers Efficiently Powering Nine White LEDs with the MCP1650
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AN658
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LCD Fundamentals Using PIC16C92X MCUs
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AN587
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Interfacing PICmicro® Microcontrollers to an LCD Module
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AN563
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Using PIC16C5X Microcontrollers as LCD Drivers
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AN557
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Four Channel Digital Voltmeter with Display and Keyboard
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AN529
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Multiplexing LED Drive and a 4x4 Keypad Sampling
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AN234
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Hardware Techniques for PICmicro®
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TB062
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High Power IR LED Driver Using the PIC16C781/782
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TB029
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TechBrief Complementary LED Drive
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Miscellaneous
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AN851
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A Flash Bootloader for PIC16 and PIC18 Devices
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AN606
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Low-Power Design Using PICmicro® Microcontrollers
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TB008
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Transformerless Power Supply
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Timekeeping
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AN649
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Yet Another Clock Featuring the PIC16C924
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AN615
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Clock Design Using Low-Power Cost Techniques
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AN590
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A Clock Design Using the PIC16C54 for LED Displays and Switch Inputs
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AN582
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Low-Power Real-Time Clock
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TB028
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Technique to Calculate Day of Week
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Security
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AN953
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Data Encryption Routines for PIC18 Microcontrollers
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AN821
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Advanced Encryption Standard Using the PIC16XXX
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AN583
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Implementation of the Data Encryption Standard Using PIC17C42
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Temperature Sensing
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AN828
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Measuring Temperature with the PIC16F84A Watchdog Timer Application Note
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