ADE7754ARRL Analog Devices Inc, ADE7754ARRL Datasheet - Page 36

• Manufacturer Part Number: ADE7754ARRL
• Description: IC ENERGY METERING 24-SOIC TR
• Manufacturer: Analog Devices Inc

Specifications of ADE7754ARRL

• Rohs Status: RoHS non-compliant
• Input Impedance: 370 KOhm
• Measurement Error: 0.1%
• Voltage - I/o High: 2.4V
• Voltage - I/o Low: 0.8V
• Current - Supply: 7mA
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (0.300", 7.50mm Width)
• Meter Type: 3 Phase
• For Use With: EVAL-ADE7754EBZ - BOARD EVALAUTION FOR ADE7754

ADE7754
Gain Register (18h)
The gain of the analog inputs and the mode of accumulation of the active energies in the ADE7754 are defined by writing to the gain
register. Table X summarizes the functionality of each bit in the gain register.
Bit
Location
0-1
2
3
4
5-6
7
CFNUM Register (25h)
The CF scaling numerator and the sign of the active energy per phase are defined by writing/reading to the CFNUM register.
Table XI summarizes the functionality of each bit in the CFNUM register.
Bit
Location
0-Bh
Ch
Dh
Eh
Fh
Bit
Mnemonic
PGA1
ABS
NO LOAD
RESERVED
PGA2
RESERVED
Bit
Mnemonic
CFN
NEGA
NEGB
NEGC
RESERVED
Default
Value
0
0
0
0
Default
Value
0
0
0
0
This is intended for factory testing only and should be left at 0.
This is intended for factory testing only and should be left at 0.
Description
These bits are used to select the gain of the current channels inputs.
Bit 1
0
0
1
0
The sum of the absolute active energies is done in the ANERGY and LAENERGY registers
when this bit is set to Logic 1. The regular sum is done when this bit is set to Logic 0—
default mode.
The active energy of each phase is not accumulated in the total active energy registers if the
instantaneous active power is lower than the no-load threshold when this bit is set to Logic 0;
this mode is selected by default.
These bits are used to select the gain of the voltage channels inputs.
Bit 6
0
0
1
0
Description
CF Scaling Numerator Register. The content of this register is used in the numerator of CF
output scaling.
The sign of the Phase A instantaneous active power is available in this bit. Logic 0 and Logic 1
correspond to positive and negative active power, respectively. The functionality of this bit is
enabled by setting Bit 5 of the WATMode register to Logic 1. When disabled, NEGA is equal
to its default value.
The sign of the Phase B instantaneous active power is available in this bit. Logic 0 and Logic 1
correspond to positive and negative active power, respectively. The functionality of this bit is
enabled by setting Bit 4 of the WATMode register to Logic 1. When disabled, NEGB is equal
to its default value.
The sign of the Phase C instantaneous active power is available in this bit. Logic 0 and Logic 1
correspond to positive and negative active power, respectively. The functionality of this bit is
enabled by setting Bit 3 of the WATMode register to Logic 1. When disabled, NEGC is equal
o its default value.
Table XI. CFNUM Register
Bit 0
0
1
0
0
Bit 5
0
1
0
0
Table X. GAIN Register
–36–
PGA1 = 1
PGA1 = 2
PGA1 = 4
Reserved
PGA2 = 1
PGA2 = 2
PGA2 = 4
Reserved
REV. 0