78M6610+PSU/EK#1 Maxim Integrated, 78M6610+PSU/EK#1 Datasheet - Page 9

• Manufacturer Part Number: 78M6610+PSU/EK#1
• Description: Development Boards & Kits - Other Processors 78M6610 EVAL KIT
• Manufacturer: Maxim Integrated

Specifications of 78M6610+PSU/EK#1

• Rohs: yes
• Part # Aliases: 90-X6610#KK1

calculations, alarms, auxiliary functions such as calibrations, zero-crossing, relay control, etc.
A set of input (write), output (read) and read/write registers are provided to allow access to calculated
data and alarms and to configure the device. The input (write) registers values can be saved into flash
memory through a specific command. The values saved into flash memory will be loaded in these
registers at reset or power-on as defaults.
(gain) compensation.
by the user, by an automatic calibration routine or adjusted dynamically by the FW.
2.1.2 Phase Compensation
60Hz line frequency).
2 Functional Description and Operation
This section describes the 78M6610+PSU functionality. It includes measurements and relevant
2.1 Voltage and Current Inputs Conditioning
The sensor input voltages are digitized using a single integrated second-order delta-sigma A/D converter.
The analog front-end includes a temperature sensor whose output is digitized and used for temperature
2.1.1 High Pass Filters (HPF) and Offset Correction
The high-pass filters (HPF) in Figure 4 and Figure 5 can remove any DC from the signal paths and
consequently from power and RMS calculated values. The HPFs work by subtracting the value of the
offset register (Voffs, Ioffs) from the corresponding voltage or current input. The offset registers can be set
A phase compensation register is provided to compensate phase errors introduced by current
transformers (CT) or external filters. The amount of phase shift is set by the PhaseComp register as a
fractional number of ADC samples with a total range of +/- 4 ADC samples (roughly +/- 20 degrees for a
Rev 1
ATEMP
AVN
AVP
AIN
AIP
2
CONDITIONING
SIGNAL
CROSS
POINT
TEMPERATURE
SENSOR
ON-CHIP
Figure 4: Analog Input Signal Conditioning
+ 250mv
F
ADC
REFERENCE
MODULATOR
offs
PRECISION
-
∆Σ
ADC
DECIMATOR
Figure 5: HPF
SINC
+
3
HPFcoef
HPF
X
IA_ RAW
DIE_ TEMP
VA _ RAW
N
Tgain
X
GAIN CORRECTION
Vgain
Igain
n=0
Compensation
N-1
Temperature
∑
Toffs
X
X
X
78M6610+PSU Data Sheet
X
X
PhaseComp
CT PHASE
COMP
DELAY
COMP
HPFcoeffI
HPFcoefV
HPF
HPF
i
v
9