ADE7518ASTZF16-RL Analog Devices Inc, ADE7518ASTZF16-RL Datasheet - Page 43

• Manufacturer Part Number: ADE7518ASTZF16-RL
• Description: 1-Phase Energy Meter IC
• Manufacturer: Analog Devices Inc

Specifications of ADE7518ASTZF16-RL

• Applications: Energy Measurement
• Core Processor: 8052
• Program Memory Type: FLASH (16 kB)
• Controller Series: ADE75xx
• Ram Size: 512 x 8
• Interface: I²C, SPI, UART
• Number Of I /o: 20
• Voltage - Supply: 3.135 V ~ 3.465 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Voltage Channel ADC
Figure 41 shows the ADC and signal processing chain for the
voltage channel. In waveform sampling mode, the ADC outputs
a signed, twos complement, 24-bit data-word at a maximum
of 25.6 kSPS (MCLK/160). The ADC produces an output code
that is approximately between 0x28F5 (+10,485d) and 0xD70B
(−10,485d).
Channel Sampling
The waveform samples of the current ADC and voltage ADC
can also be routed to the waveform registers to be read by the
MCU core. The active, reactive, apparent power, and energy
calculation remain uninterrupted during waveform sampling.
0.5V, 0.25V,
0.125V, 62.5mV,
31.3mV
V2
0V
V
V
P
N
V2
ANALOG
INPUT
RANGE
PGA2
×1, ×2, ×4,
×8, ×16
{GAIN[7:5]}
0xD70B
0x28F5
0x0000
REFERENCE
Figure 41. ADC and Signal Processing in Voltage Channel
ADC
VOLTAGE CHANNEL
WAVEFORM
DATA RANGE
HPF
Rev. 0 | Page 43 of 128
ACTIVE AND REACTIVE
POWER CALCULATION
f
–3dB
MODE1[6]
WAVEFORM SAMPLE
REGISTER
VOLTAGE PEAK DETECT
When in waveform sampling mode, one of four output sample
rates can be chosen by using the DTRT[1:0] bits of the WAVMODE
register (see Table 33 ) . The output sample rate can be 25.6 kSPS,
12.8 kSPS, 6.4 kSPS, or 3.2 kSPS. If the WFSM enable bit is set
in the Interrupt Enable 3 SFR (MIRQENH, 0xDB), the 8052
core has a pending ADE interrupt. The sampled signals selected
in the WAVMODE register are latched into the Waveform SFRs
when the waveform high byte (WAV1H or WAV2H) is read.
The ADE interrupt stays active until the WFSM status bit is
cleared (see the Energy Measurement Interrupts section).
VOLTAGE RMS (V
CALCULATION
LPF1
= 63.7Hz
rms
0x1DD0
0xDFC9
0xE230
ZX DETECTION
0x0000
0x2037
0x0000
)
ZX SIGNAL
DATA RANGE FOR 50Hz SIGNAL
ZX SIGNAL
DATA RANGE FOR 60Hz SIGNAL
ADE7518