MCP3905L-I/SS Microchip Technology, MCP3905L-I/SS Datasheet - Page 19
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MCP3905L-I/SS
Manufacturer Part Number
MCP3905L-I/SS
Description
IC,Power Metering,SSOP,24PIN,PLASTIC
Manufacturer
Microchip Technology
Datasheets
1.MCP3905L-ISS.pdf
(30 pages)
2.MCP3906A-ISS.pdf
(26 pages)
3.MCP3905L-ISS.pdf
(26 pages)
Specifications of MCP3905L-I/SS
Input Impedance
390 KOhm
Measurement Error
0.1%
Voltage - I/o High
2.4V
Voltage - I/o Low
0.85V
Current - Supply
2.7mA
Voltage - Supply
4.5 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
24-SSOP (0.200", 5.30mm Width)
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
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
MCP3905RD-PM1 - REFERENCE DESIGN FOR MCP3905MCP3905EV - BOARD DEMO FOR MCP3905
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
4.7
The thresholds for the accumulated energy are
different for F
ent transfer functions). The F
frequencies are quite low in order to allow superior
integration time (see Section 4.6 “Low-Pass Filter
and DTF Converter”). The F
can be calculated with the following equation:
EQUATION 4-1:
TABLE 4-3:
© 2009 Microchip Technology Inc.
Where:
V
REF
F1
0
0
1
1
F
V
V
G = the PGA gain on Channel 0
C
0
1
F
= the RMS differential voltage on Channel 0
= the RMS differential voltage on Channel 1
= the frequency constant selected
= the voltage reference
F
Frequencies
OUT
OUT0/1
(current channel)
OUT0/1
(
F0
Hz
0
1
0
1
)
OUTPUT FREQUENCY CONSTANT FC FOR FOUT0/1 (V
and HF
=
and HF
F
OUTPUT EQUATION
8.06
---------------------------------------------------------- -
OUT
MCLK/2
MCLK/2
MCLK/2
MCLK/2
F
×
C
OUT
OUT
FREQUENCY
V
(
OUT0/1
(Hz)
0
V
OUT0/1
×
REF
(i.e., they have differ-
21
20
19
18
V
Output
1
)
×
2
output frequency
G F
allowed output
×
(MCLK = 3.58 MHz)
C
F
13.66
C
1.71
3.41
6.83
(Hz)
For a given DC input V, the DC and RMS values are
equivalent. For a given AC input signal with peak-to-
peak amplitude of V, the equivalent RMS value is V/
sqrt(2), assuming purely sinusoidal signals. Note that
since the active (real) power is the product of two RMS
inputs, the output frequencies of an AC signal is half
that of the DC equivalent signal, again assuming purely
sinusoidal AC signals. The constant F
F
F
settings.
OUT0
OUT0/1
F
OUT
with Full-Scale
and F
output frequencies for the different logic
Frequency (Hz)
DC Inputs
0.74
1.48
2.96
5.93
OUT1
digital settings.
REF
MCP3905/06
= 2.4V)
F
OUT
with Full-Scale
Frequency (Hz)
AC Inputs
DS21948E-page 19
C
Table 4-3
depends on the
0.37
0.74
1.48
2.96
shows