MCP3909-I/SS Microchip Technology, MCP3909-I/SS Datasheet - Page 101

• Manufacturer Part Number: MCP3909-I/SS
• Description: IC POWER METERING-1 PHASE 24SSOP
• Manufacturer: Microchip Technology

Specifications of MCP3909-I/SS

• Package / Case: 24-SSOP (0.200", 5.30mm Width)
• Input Impedance: 390 KOhm
• Measurement Error: 0.1%
• Voltage - I/o High: 2.4V
• Voltage - I/o Low: 0.85V
• Current - Supply: 2.3mA
• Voltage - Supply: 4.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Meter Type: Single Phase
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Supply Voltage Range: 4.5V To 5.5V
• Digital Ic Case Style: SSOP
• No. Of Pins: 24
• Interface Type: Serial, SPI
• Supply Voltage Max: 5.5V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: MCP3909EV-MCU16 - EVALUATION BOARD FOR MCP3909MCP3909RD-3PH1 - REF DESIGN MCP3909 3PH ENGY MTR
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

© 2009 Microchip Technology Inc.
To avoid complexity in calculation and to maximize the correction precision, the
following equations may be used to approximate K
small.
EQUATION C-80:
EQUATION C-81:
k'
2
k'
=
=
1
k
sin
=
=
2
–
Δ
k
cos
1
Δ
----- - k
50
ϕ
–
f
Power Calculation Theory
Δϕ
≈
⋅
----- - k
50
Δ
sin
f
1
≈
⋅
⋅
Δ
cos
k
2
ϕ
2
⋅
–
Δϕ
k
2
Δ
----- - sin
50
f
–
⋅
Δ
----- - sin
50
f
1
⋅
Δϕ
and K
⋅
2
cos
Δϕ
2
Δϕ
when the phase angle is
DS51723A-page 101