OM13006,598 NXP Semiconductors, OM13006,598 Datasheet - Page 194

• Manufacturer Part Number: OM13006,598
• Description: BOARD EVAL EM773 METER EU PLUG
• Manufacturer: NXP Semiconductors
• Type: Other Power Managementr

Specifications of OM13006,598

• Design Resources: Plug Meter Schematics, Gerber Files USB Dongle Schematics, Gerber Files
• Main Purpose: Power Management, Energy/Power Meter
• Embedded: Yes, MCU, 32-Bit
• Utilized Ic / Part: EM773FHN33,551
• Interface Type: USB
• Maximum Operating Temperature: + 150 C
• Operating Supply Voltage: 1.8 V to 3.6 V
• Product: Power Management Development Tools
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Primary Attributes: -
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: EM773, OL2381
• Other names: 568-6681

NXP Semiconductors
UM10415
User manual
16.6.2.1 Vpp calibration
16.6.2 Calibration procedure
The Metrology Engine can be calibrated by changing the configuration parameters for an
individual meter.
Before calibration, make sure to set the right values for AHBClkFrequency and mains
frequency Fmains with the initialization of the Metrology Engine.
The Calibration Measurements Setup is shown in
The voltage input measurement range Vpp can be calibrated as follows:
Fig 49. EM773 calibration measurements setup
•
•
•
Calculate the initial value for Vpp with the transfer of the analog input circuit in front of
the Metrology Engine and the input range of the VOLTAGE input of the Energy IC
(VSS to VDD). Set the parameter Vpp to this initial value.
Connect an AC reference voltage source to the meter with a reference voltage
(Vsource) and frequency (e.g. 110V/60Hz or 230V/50Hz).
Measure the output value for voltage V. The calibrated value for Vpp can then be
calculated as:
AC Reference Voltage Source
Resistive Load
All information provided in this document is subject to legal disclaimers.
V
Rev. 1 — 10 September 2010
A
Rshunt
R
Vpp
Supply
Power
Opamp
R
=
Vpp
I_HIGHGAIN
I_LOWGAIN
,
initialval
VOLTAGE
V
SS
EM773
ue
Chapter 16: EM773 Metrology engine
Figure
Metrology
engine
⋅
⎛
⎜
⎝
V
source
I2C/SPI/UART Power meter
V
49.
V
⎞
⎟
⎠
DD
UM10415
© NXP B.V. 2010. All rights reserved.
Data output
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