MCP3901A0-E/SS Microchip Technology, MCP3901A0-E/SS Datasheet - Page 16

• 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

FIGURE 2-6:
DS51915A-page 16
Although complex, long, finite impulse response (FIR) structures called Sinc Compen-
sation Filters are usually used to compensate for low-pass filter difficulties, they cannot
be implemented in this application because the MCU is being used at close to maxi-
mum computation power.
The appropriate solution is to adjust the cutoff frequency of the IIR HPF to a value at
which the transfer function of the HPF will compensate the Sinc transfer function to
approximately the 50 Hz value. The simulation and the measurements indicate that a
cutoff frequency of 9 Hz for the HPF is the best choice in this case (see Figure 2-6).
Sinc Filter Compensation Using HPF.
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