ADE7763ARS Analog Devices Inc, ADE7763ARS Datasheet - Page 43

• Manufacturer Part Number: ADE7763ARS
• Description: IC ENERGY METER 1PHASE 20SSOP
• Manufacturer: Analog Devices Inc

Specifications of ADE7763ARS

• Input Impedance: 390 KOhm
• Measurement Error: 0.1%
• Voltage - I/o High: 2.4V
• Voltage - I/o Low: 0.8V
• Current - Supply: 3mA
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SSOP (0.200", 5.30mm Width)
• Meter Type: Single Phase
• For Use With: EVAL-ADE7763ZEB - BOARD EVALUATION FOR ADE7763
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

CLKIN FREQUENCY
In this data sheet, the characteristics of the ADE7763 are shown
when CLKIN frequency equals 3.579545 MHz. However, the
ADE7763 is designed to have the same accuracy at any CLKIN
frequency within the specified range. If the CLKIN frequency is
not 3.579545 MHz, various timing and filter characteristics will
need to be redefined with the new CLKIN frequency. For
example, the cutoff frequencies of all digital filters, such as
LPF1, LPF2, or HPF1, shift in proportion to the change in
CLKIN frequency according to the following equation:
The change in CLKIN frequency does not affect the timing
characteristics of the serial interface because the data transfer is
synchronized with the serial clock signal (SCLK). However, it is
New
Frequency
=
Original
Frequency
SET HALF LINE CYCLES FOR ACCUMULATION
WRITE CFDEN VALUE TO CFDEN REGISTER
CALCULATE CFDEN VALUE FOR DESIGN
CALCULATE VAGAIN. SEE EQUATION 65.
CALCULATE WGAIN. SEE EQUATION 43.
ENABLE LINE CYCLE ACCUMULATION
ACCUMULATION ADDR. 0x09 = 0x0080
READ LINE ACCUMULATION ENERGY
SET I
IN LINECYC REGISTER ADDR. 0x1C
RESET THE INTERRUPT STATUS
RESET THE INTERRUPT STATUS
APPARENT ENERGY: ADDR. 0x07
INTERRUPT ADDR. 0x0A = 0x04
READ REGISTER ADDR. = 0x0C
READ REGISTER ADDR. = 0x0C
ACTIVE ENERGY: ADDR. 0x04
SET MODE FOR LINE CYCLE
TEST
×
ADDR. 0x15 = CFDEN
CLKIN
= I
. 3
INTERRUPT?
INTERRUPT?
YES
YES
b
579545
, V
TEST
Frequency
Figure 78. Active/Apparent Gain Calibration
= V
MHz
NOM
, PF = 1
NO
NO
Rev. B | Page 43 of 56
(69)
WRITE WGAIN VALUE TO ADDR. 0x12
WRITE VGAIN VALUE TO ADDR. 0x1A
important to observe the read/write timing of the serial data
transfer—see the timing characteristics in Table 2. Table 8 lists
various timing changes that are affected by CLKIN frequency.
Table 8. Frequency Dependencies of the ADE7763
Parameters
Parameter
Nyquist Frequency for CH 1, CH 2 ADCs
PHCAL Resolution (seconds per LSB)
Active Energy Register Update Rate (Hz)
Waveform Sampling Rate (per second)
WAVSEL 1,0 =
Maximum ZXTOUT Period
0 0
0 1
1 0
1 1
CLKIN Dependency
CLKIN/8
4/CLKIN
CLKIN/4
CLKIN/128
CLKIN/256
CLKIN/512
CLKIN/1024
524,288/CLKIN
ADE7763