MCP3901A0-E/SS Microchip Technology, MCP3901A0-E/SS Datasheet - Page 17

• Manufacturer Part Number: MCP3901A0-E/SS
• Description: IC ENERGY METER AFE 2CH 20-SSOP
• Manufacturer: Microchip Technology

Specifications of MCP3901A0-E/SS

• Number Of Bits: 24
• Number Of Channels: 2
• Power (watts): 10mW
• Voltage - Supply, Analog: 4.5 V ~ 5.5 V
• Voltage - Supply, Digital: 2.7 V ~ 5.5 V
• Package / Case: 20-SSOP (0.200", 5.30mm Width)
• Ic Function: Analog Front End Device IC
• Supply Voltage Range: 4.5V To 5.5V
• Operating Temperature Range: -40°C To +85°C
• Digital Ic Case Style: SSOP
• No. Of Pins: 20
• No. Of Channels: 2
• Input Voltage: 2.2 V to 2.6 V
• Mounting Style: SMD/SMT
• Supply Voltage Max: 5.5V
• Rohs Compliant: Yes
• Interface Type: SPI
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

 2010 Microchip Technology Inc.
Figure 2-7 illustrates the error measurements in the frequency range of 48-52 Hz at
5 A
FIGURE 2-7:
Line frequency compensation is a simplified solution and does not compensate for fre-
quencies in which harmonics exist. However, it significantly improves the overall
accuracy of the meter.
There is one drawback to using this method. As demonstrated, the signal will be atten-
uated a little more than it is when the HPF has a lower cutoff frequency. This extra
attenuation slightly increases the measurement errors at low currents in which mea-
surement is made more difficult because of the lower signal-to-noise ratio (SNR). In this
situation, the accuracy decrease is less than 0.1% and is considered acceptable.
RMS
current.
-0.02
-0.04
-0.06
-0.08
0.08
0.06
0.04
0.02
-0.1
0.1
0
47
Errors vs. Line Frequency.
48
Frequency Line (Hz)
49
50
Error vs frequency
51
52
DS51915A-page 17
53