- 您现在的位置：买卖IC网 > Datasheet目录307 > ADE7755ARSZ (Analog Devices Inc)IC ENERGY METERING 1PHASE 24SSOP Datasheet资料下载
参数资料
| 型号： | ADE7755ARSZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 18/20页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METERING 1PHASE 24SSOP |
| 标准包装： | 59 |
| 输入阻抗： | 390 千欧 |
| 测量误差： | 0.1% |
| 电压 - 高输入/输出： | 2.4V |
| 电压 - 低输入/输出： | 0.8V |
| 电流 - 电源： | 3mA |
| 电源电压： | 4.75 V ~ 5.25 V |
| 测量仪表类型： | 单相 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 24-SSOP |
| 包装： | 管件 |
| 配用： | EVAL-ADE7755ZEB-ND - BOARD EVALUATION FOR AD7755 |
ADE7755
Table 8. Maximum Output Frequency on CF
SCF
1
0
1
0
1
0
1
0
S1
0
0
0
0
1
1
1
1
S0
0
0
1
1
0
0
1
1
f 1 , f 2 , f 3 , and f 4 (Hz)
f 1 = 1.7
f 1 = 1.7
f 2 = 3.4
f 2 = 3.4
f 3 = 6.8
f 3 = 6.8
f 4 = 13.6
f 4 = 13.6
CF Maximum for AC Signals
128 × F1, F2 = 43.52 Hz
64 × F1, F2 = 21.76 Hz
64 × F1, F2 = 43.52 Hz
32 × F1, F2 = 21.76 Hz
32 × F1, F2 = 43.52 Hz
16 × F1, F2 = 21.76 Hz
16 × F1, F2 = 43.52 Hz
2048 × F1, F2 = 5.57 kHz
SELECTING A FREQUENCY FOR AN ENERGY
METER APPLICATION
As shown in Table 6, the user can select one of four frequencies.
This frequency selection determines the maximum frequency
on F1 and F2. These outputs are intended to be used to drive
the energy register (electromechanical or other). Because only
four different output frequencies can be selected, the available
frequency selection has been optimized for a meter constant of
100 imp/kWh with a maximum current between 10 A and 120 A.
Table 9 shows the output frequency for several maximum currents
(I MAX ) with a line voltage of 220 V. In all cases, the meter
constant is 100 imp/kWh.
Table 9. F1 and F2 Frequency at 100 imp/kWh
I MAX (A) F1 and F2 (Hz)
12.5 0.076
25 0.153
40 0.244
When selecting a suitable f i frequency (i = 1, 2, 3, or 4) for a
meter design, the frequency output at I MAX (maximum load)
with a meter constant of 100 imp/kWh should be compared with
Column 4 of Table 10. The frequency that is closest in Table 10
determines the best choice of f i frequency (i = 1, 2, 3, or 4). For
example, if a meter with a maximum current of 25 A is being
designed, the output frequency on F1 and F2 with a meter constant
of 100 imp/kWh is 0.153 Hz at 25 A and 220 V (from Table 9).
Table 10, the closest frequency to 0.153 Hz in Column 4, is 0.17 Hz.
Therefore, f 2 (3.4 Hz, see Table 6) is selected for this design.
FREQUENCY OUTPUTS
Figure 2 shows a timing diagram for the various frequency
outputs. The F1 and F2 outputs are the low frequency outputs
that can be used to directly drive a stepper motor or electro-
mechanical impulse counter. The F1 and F2 outputs provide
two alternating low going pulses. The pulse width (t 1 ) is set at
275 ms, and the time between the falling edges of F1 and F2 (t 3 )
is approximately half the period of F1 (t 2 ). If, however, the period of
60
80
120
0.367
0.489
0.733
F1 and F2 falls below 550 ms (1.81 Hz), the pulse width of F1 and
F2 is set to half of their period. The maximum output frequencies
for F1 and F2 are shown in Table 7.
The f i frequencies (i = 1, 2, 3, or 4) allow complete coverage of
this range of output frequencies on F1 and F2. When designing
an energy meter, the nominal design voltage on Channel 2 (voltage)
should be set to half scale to allow for calibration of the meter
constant. The current channel should also be no more than half
scale when the meter sees maximum load. This allows overcurrent
signals and signals with high crest factors to be accommodated.
Table 10 shows the output frequency on F1 and F2 when both
analog inputs are half scale. The frequencies listed in Table 10
align well with those listed in Table 9 for maximum load.
Table 10. F1 and F2 Frequency with Half-Scale AC Inputs
F1 and F2 Frequency on CH1 and
The high frequency CF output is intended to be used for
communications and calibration purposes. CF produces a
90 ms wide active high pulse (t 4 ) at a frequency proportional
to active power. The CF output frequencies are listed in Table 8.
As in the case of F1 and F2, if the period of CF (t 5 ) falls below
180 ms, the CF pulse width is set to half the period. For example,
if the CF frequency is 20 Hz, the CF pulse width is 25 ms.
When the high frequency mode is selected (that is, SCF = 0,
S1 = S0 = 1), the CF pulse width is fixed at 18 μs. Therefore, t 4
is always 18 μs, regardless of the output frequency on CF.
S1
0
0
1
1
S0
0
1
0
1
f 1 , f 2 , f 3 , and f 4 (Hz)
f 1 = 1.7
f 2 = 3.4
f 3 = 6.8
f 4 = 13.6
CH2 Half-Scale AC Inputs (Hz)
0.085
0.17
0.34
0.68
Rev. A | Page 18 of 20
相关PDF资料 |
PDF描述 |
|---|---|
| ADE7757ARNZRL | IC ENERGY METERING 1PHASE 16SOIC |
| ADE7758ARWZRL | IC ENERGY METERING 3PHASE 24SOIC |
| ADE7761AARSZ-RL | IC ENERGY METERING 1PHASE 20SSOP |
| ADE7761BARSZ-RL | IC ENERGY METERING 1PHASE 20SSOP |
| ADE7768ARZ-RL | IC ENERGY METERING 1PHASE 16SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADE7755ARSZ1 | 制造商:AD 制造商全称:Analog Devices 功能描述:Energy Metering IC with Pulse Output |
| ADE7755ARSZRL | 功能描述:IC ENERGY METERING 1PHASE 24SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 能量测量 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:* |
| ADE7756 | 制造商:AD 制造商全称:Analog Devices 功能描述:Active Energy Metering IC with Serial Interface |
| ADE7756AN | 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin PDIP |
| ADE7756AN-REF | 制造商:AD 制造商全称:Analog Devices 功能描述:Active Energy Metering IC with Serial Interface |
发布紧急采购，3分钟左右您将得到回复。