- 您现在的位置：买卖IC网 > Datasheet目录307 > ADE7761AARSZ-RL (Analog Devices Inc)IC ENERGY METERING 1PHASE 20SSOP Datasheet资料下载
参数资料
| 型号： | ADE7761AARSZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 12/24页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METERING 1PHASE 20SSOP |
| 产品变化通告： | Product Discontinuance 27/Oct/2011 |
| 标准包装： | 1,500 |
| 输入阻抗： | 400 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： | 20-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 20-SSOP |
| 包装： | 带卷 (TR) |
ADE7761A
The differential voltage MISCAL ? V 2N must be referenced
to a common mode (usually AGND). The analog inputs of the
ADE7761A can be driven with common-mode voltages of up
to 100 mV with respect to AGND. However, best results are
achieved using a common mode equal to AGND.
Typical Connection Diagrams
Adjusting the level of MISCAL to calibrate the meter in missing
neutral mode can be done by changing the ratio of RC and RD
+ VR1. When the internal reference is used, the values of RC,
RD, and VR1 must be chosen to limit the current sourced by
the internal reference sourcing current to below the specified
20 μA. Therefore, because V REF internal = 2.5 V, RC + RD +
VR1 > 600 kΩ.
Figure 15 shows a typical connection diagram for Channel V1.
The analog inputs are used to monitor both the phase and
neutral currents. Because of the large potential difference
between the phase and neutral, two current transformers (CTs)
REF IN/OUT
RC
RD
VR1
C F
MISCAL
must be used to provide the isolation. Note that both CTs are
R F
V 2N
referenced to analog ground (AGND); therefore, the common-
mode voltage is 0 V. The CT turns ratio and burden resistor
(RB) are selected to give a peak differential voltage of
±660 mV/gain.
C F
Figure 17. Typical Connection for MISCAL
INTERNAL OSCILLATOR
CT
RB
R F
±660mV
GAIN
C F
V 1A
The nominal internal oscillator frequency is 450 kHz when
used with the recommended R OSC resistor value of 6.2 kΩ
between RCLKIN and DGND (see Figure 18).
IP
IN
AGND
RB
±660mV
GAIN
C F
V 1N
The internal oscillator frequency is inversely proportional to the
value of this resistor. Although the internal oscillator operates
when used with an R OSC resistor value between 5 kΩ and 12 kΩ,
CT
R F V 1B
Figure 15. Typical Connection for Channel 1
Figure 16 shows two typical connections for Channel V2.
The first option uses a potential transformer (PT) to provide
complete isolation from the main voltage. In the second option,
the ADE7761A is biased around the neutral wire, and a resistor
divider is used to provide a voltage signal that is proportional to
the line voltage. Adjusting the ratio of RA and RB + VR is a
convenient way to carry out a gain calibration on the meter.
it is recommended to choose a value within the range of the
nominal value.
The output frequencies on CF, F1, and F2 are directly propor-
tional to the internal oscillator frequency; therefore, the resistor
R OSC must have a low tolerance and low temperature drift. A low
tolerance resistor limits the variation of the internal oscillator
frequency. A small variation of the clock frequency and
consequently of the output frequencies from meter to meter
contributes to a smaller calibration range of the meter.
RA 1
±660mV
AGND
R F
R F
C F
C F
V 2P
V 2N
A low temperature drift resistor directly limits the variation of
the internal clock frequency over temperature. The stability of
the meter to external variation is then better ensured by design.
ADE7761A
3k ?
2.5V
INTERNAL
RB 1
VR 1
C F
R F
V 2P
V 2N
REFERENCE
9
REF IN/OUT
OSCILLATOR
14
RCLKIN
17
DGND
C T
1 RB + VR = RF.
Figure 16. Typical Connection for Channel 2
Figure 17 shows a typical connection for the MISCAL input.
The voltage reference input (REF IN/OUT ) is used as a dc reference
to set the MISCAL voltage.
Rev. 0 | Page 12 of 24
R OSC
Figure 18. Internal Oscillator Connection
相关PDF资料 |
PDF描述 |
|---|---|
| ADE7761BARSZ-RL | IC ENERGY METERING 1PHASE 20SSOP |
| ADE7768ARZ-RL | IC ENERGY METERING 1PHASE 16SOIC |
| ADE7769ARZ-RL | IC ENERGY METERING 1PHASE 16SOIC |
| ADM8843ACPZ-REEL7 | IC LED DRVR WHITE BCKLGT 16LFCSP |
| ADP1653ACPZ-R7 | IC LED DRVR PHOTO FLASH 16-LFCSP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| ADE7761ARS | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| ADE7761ARS-REF | 制造商:Analog Devices 功能描述:ENERGY METER IC W/FAULT&MNEUT DETEC. - Bulk |
| ADE7761ARSRL | 制造商:AD 制造商全称:Analog Devices 功能描述:Energy Metering IC with On-Chip Fault and Missing Neutral Detection |
| ADE7761B | 制造商:AD 制造商全称:Analog Devices 功能描述:Energy Metering IC with On-Chip Fault and Missing Neutral Detection |
| ADE7761BARS | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
发布紧急采购，3分钟左右您将得到回复。