STEVAL-IPE008V1 STMicroelectronics, STEVAL-IPE008V1 Datasheet - Page 14

• Manufacturer Part Number: STEVAL-IPE008V1
• Description: BOARD EVAL STPM01/STR715FR0
• Manufacturer: STMicroelectronics
• Type: Other Power Managementr

Specifications of STEVAL-IPE008V1

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, ARM7
• Utilized Ic / Part: STPM01, STR715FR0
• Primary Attributes: 3-Ph Energy Meter (or Single Phase)
• Secondary Attributes: Measures Active, Reactive, Apparent Power
• Product: Power Management Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: STPM01, STR715FR0
• Other names: 497-6412; STEVAL-IPE008V1

Terminology
6
6.1
6.2
6.3
6.4
6.5
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Terminology
Measurement error
The error associated with the energy measurement made by the STPM01 is defined as:
Percentage error = [STPM01 (reading) - true energy] / true energy
ADC offset error
This is the error due to the DC component associated with the analog inputs of the A/D
converters. Due to the internal automatic DC offset cancellation the STPM01 measurement
is not affected by DC components in voltage and current channel. The DC offset
cancellation is implemented in the DSP.
Gain error
The gain error is gain due to the signal channel gain amplifiers. This is the difference
between the measured ADC code and the ideal output code. The difference is expressed as
percentage of the ideal code.
Power supply DC and AC rejection
This parameter quantifies the STPM01 measurement error as a percentage of reading when
the power supplies are varied. For the PSRRAC measurement, a reading at two nominal
supplies voltages (3.3 and 5 V) is taken. A second reading is obtained with the same input
signal levels when an ac (200 mV
error introduced by this ac signal is expressed as a percentage of reading.
For the PSRRDC measurement, a reading at two nominal supplies voltages (3.3 and 5V) is
taken. A second reading is obtained with the same input signal levels when the supplies are
varied ± 10 %. Any error introduced is again expressed as a percentage of the reading.
Conventions
The lowest analog and digital power supply voltage is named V
system ground (GND). All voltage specifications for digital input/output pins are referred to
GND.
Positive currents flow into a pin. Sinking current means that the current is flowing into the pin
and then it is positive. Sourcing current means that the current is flowing out of the pin and
then it is negative.
Timing specifications of signal treated by a digital control part are relative to CLKOUT. This
signal is provided from the crystal oscillator of 4.194 MHz nominal frequency or from the
internal RC oscillator, eventually an external source of 4.194 MHz or 8.192 MHz can be
used.
Timing specifications of signals of the SPI interface are relative to the SCLNLC, there is no
direct relationship between the clock (SCLNLC) of the SPI interface and the clock of the
DSP block. A positive logic convention is used in all equations.
Doc ID 10853 Rev 7
RMS
/100 Hz) signal is introduced onto the supplies. Any
SS
which represent the
STPM01