参数资料
型号: ADE7518ASTZF16
厂商: Analog Devices Inc
文件页数: 43/128页
文件大小: 0K
描述: IC ENERGY METER MCU 16K 64LQFP
产品变化通告: Product Discontinuance 27/Oct/2011
特色产品: ADE7518: Single-phase Energy-Measurement IC
标准包装: 160
输入阻抗: *
测量误差: *
电压 - 高输入/输出: *
电压 - 低输入/输出: *
电流 - 电源: *
电源电压: *
测量仪表类型: *
工作温度: *
安装类型: 表面贴装
封装/外壳: 64-LQFP
供应商设备封装: 64-LQFP(10x10)
包装: 托盘
产品目录页面: 797 (CN2011-ZH PDF)
ADE7518
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.
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).
HPF
V2
V P
V N
×1, ×2, ×4,
×8, ×16
{GAIN[7:5]}
PGA2
REFERENCE
ADC
ACTIVE AND REACTIVE
POWER CALCULATION
VOLTAGE RMS (V rms )
CALCULATION
WAVEFORM SAMPLE
REGISTER
VOLTAGE PEAK DETECT
V2
0.5V, 0.25V,
0.125V, 62.5mV,
31.3mV
0V
ANALOG
INPUT
RANGE
0x28F5
VOLTAGE CHANNEL
WAVEFORM
DATA RANGE
LPF1
f –3dB = 63.7Hz
MODE1[6]
ZX DETECTION
ZX SIGNAL
DATA RANGE FOR 60Hz SIGNAL
0x1DD0
0x0000
0x0000
0xE230
0xD70B
ZX SIGNAL
DATA RANGE FOR 50Hz SIGNAL
0x2037
0x0000
0xDFC9
Figure 41. ADC and Signal Processing in Voltage Channel
Rev. 0 | Page 43 of 128
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