ADE7758ARW Analog Devices Inc, ADE7758ARW Datasheet - Page 44

• Manufacturer Part Number: ADE7758ARW
• Description: IC ENERGY METERING 24-SOIC
• Manufacturer: Analog Devices Inc

Specifications of ADE7758ARW

• Rohs Status: RoHS non-compliant
• Input Impedance: 380 KOhm
• Measurement Error: 0.1%
• Voltage - I/o High: 2.4V
• Voltage - I/o Low: 0.8V
• Current - Supply: 8mA
• 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
• Lead Free Status / RoHS Status: Not Compliant

ADE7758
Step 1: Enable the pulse output by setting Bit 2 of the OPMODE
register (0x13) to Logic 0. This bit enables both the APCF and
VARCF pulses.
Step 1a: VAR and VA share the VARCF pulse output.
WAVMODE[7], Address (0x15), should be set to choose
between VAR or VA pulses on the output. Setting the bit to
Logic 1 selects VA. The default is Logic 0 or VARCF pulse
output.
Step 2: Ensure the xWG/xVARG/xVAG are zero.
END
YES
VARCFNUM/VARCFDEN TO
STEP 4
CALCULATED VALUES
CALIBRATED?
SELECT VAR
ALL PHASES
FOR VARCF
VAR GAIN
OUTPUT
SET
NO
START
NO
SET TO CALCULATED
STEP 3
SELECT PHASE A,
PHASE A, B, OR C
B, OR C FOR LINE
MEASUREMENT
SET UP PULSE
OUTPUT FOR
VARCFNUM/
VARCFDEN
Figure 77. Gain Calibration Using Pulse Output
VALUES?
PERIOD
Rev. D | Page 44 of 72
YES
STEP 5
STEP 6
STEP 7
PF = 0, INDUCTIVE
CALCULATE AND
WRITE TO xVARG
SET UP SYSTEM
FOR I
MEASURE %
ERROR FOR
CALCULATE
STEP 4
TO CALCULATED VALUES
CONSTANT
VARh/LSB
SET CFNUM/VARCFNUM
AND CFDEN/VARCFDEN
VARCF
TEST
YES
, V
STEP 1A
STEP 1
ENABLE APCF AND
STEP 2
Step 3: Disable the Phase B and Phase C contribution to the APCF
and VARCF pulses. This is done by the TERMSEL[2:4] bits of
the COMPMODE register (0x16). Setting Bit 2 to Logic 1 and
Bit 3 and Bit 4 to Logic 0 allows only Phase A to be included in
the pulse outputs. Select Phase A, Phase B, or Phase C for a line
period measurement with the FREQSEL[1:0] bits in the MMODE
register (0x14). For example, clearing Bit 1 and Bit 0 selects
Phase A for line period measurement.
SELECT VA FOR
NOM
VARCF OUTPUT
CLEAR GAIN REGISTERS:
VARCF PULSE
PHASES VA
GAIN CAL?
OUTPUTS
AND WATT
xWG, xVAG, xVARG
ALL
NO
SET TO CALCULATE
STEP 3
CFNUM/VARCFNUM
PHASE A, B, OR C
NO
SET UP PULSE
OUTPUT FOR
VALUES?
YES
CALCULATE Wh/LSB
STEP 5
STEP 6
STEP 7
ERROR FOR APCF
CALCULATE AND
SET UP SYSTEM
FOR I
AND VAh/LSB
MEASURE %
CONSTANTS
AND VARCF
xWG, xVAG
WRITE TO
PF = 1
TEST
, V
NOM