收藏本站

ADE7761B
THEORY OF OPERATION
V CM
POWER SUPPLY MONITOR
The ADE7761B continuously monitors the power supply (V DD )
with its on-chip power supply monitor. If the supply is less than
4 V ± 5%, the ADE7761B goes into an inactive state; that is, no
energy is accumulated, and the CF, F1, and F2 outputs are disabled.
This is useful to ensure correct device operation at power-up
and during power-down. The power supply monitor has built-in
+660mV
GAIN
–660mV
GAIN
V 1A , V 1B
+ V CM
V CM
+ V CM
DIFFERENTIAL INPUT A
±660mV MAX PEAK
COMMON MODE
±100mV MAX
AGND
DIFFERENTIAL INPUT B
±660mV MAX PEAK
V1
V1
V 1A
V 1N
V 1B
hysteresis and filtering that provide a high degree of immunity
to false triggering due to noisy supplies.
The power supply and decoupling for the part should be such
that the ripple at V DD does not exceed 5 V ± 5%, as specified for
normal operation.
V DD
Figure 12. Maximum Signal Levels, Channel V1
Channel V2 (Voltage Channel)
The output of the line voltage transducer is connected to the
ADE7761B at this analog input. Channel V2 is a single-ended
voltage input. The maximum peak differential signal on
Channel V2 is ±660 mV with respect to V 2N . Figure 13 shows the
maximum signal levels that can be connected to Channel V2.
5V
4V
+660mV + V CM
V2
DIFFERENTIAL INPUT
V2
V 2P
0V
V CM
±660mV MAX PEAK
V 2N
TIME
ADE7761B
REVP - FAULT - CF - INACTIVE
F1 - F2 OUTPUTS
ACTIVE
INACTIVE
–660mV + V CM
COMMON MODE
±100mV MAX
V CM
Figure 11. On-Chip, Power Supply Monitoring
ANALOG INPUTS
Channel V1 (Current Channel)
The voltage outputs from the current transducers are connected
to the ADE7761B at Channel V1. It has two voltage inputs, V 1A
and V 1B . These inputs are fully differential with respect to V 1N .
However, at any one time, only one input is selected to perform
the power calculation (see the Fault Detection section).
The maximum peak differential signal on V 1A ? V 1N and V 1B ? V 1N
is ±660 mV. However, Channel V1 has a programmable gain
amplifier (PGA) with user-selectable gains of 1 and 16 (see
Table 5). This gain facilitates easy transducer interfacing.
Table 5. Channel V1 Dynamic Range
Figure 13. Maximum Signal Levels, Channel V2
The differential voltage V 2P ? V 2N must be referenced to a
common mode (usually AGND). The analog inputs of the
ADE7761B can be driven with common-mode voltages of up
to 100 mV with respect to AGND. However, the best results
are achieved using a common mode equal to AGND.
MISCAL Input
The input for the power calibration in missing neutral mode
is connected to the ADE7761B at this analog input. MISCAL
is a single-ended, voltage input. It is recommended to use a dc
signal derived from the voltage reference to drive this pin. The
maximum peak differential signal on MISCAL is 660 mV with
respect to V 2N . Figure 14 shows the maximum signal levels that
PGA
Gain
Maximum Differential Signal (mV)
can be connected to the MISCAL pin.
0 1 660
1 16 41
Figure 12 shows the maximum signal levels on V 1A , V 1B , and
V 1N . The maximum differential voltage is ±660 mV divided by
the gain selection. The differential voltage signal on the inputs
MISCAL
+660mV + V CM
V CM
DIFFERENTIAL INPUT
±660mV MAX PEAK
COMMON MODE
±100mV MAX
MISCAL
MISCAL
V 2N
V CM
must be referenced to a common mode (usually AGND).
AGND
Figure 14. Maximum Signal Levels, MISCAL
The differential voltage, MISCAL ? V 2N , must be referenced
to a common mode (usually AGND). The analog inputs of the
ADE7761B 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.
Rev. 0 | Page 11 of 24
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
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
ADP1712-EVALZ BOARD EVALUATION ADP1712
ADP1720-EVALZ BOARD EVAL FOR ADP1720-ADJ
ADP2140CPZ-REDYKIT REDYKIT 2 BOARDS ADP2140ACPZ
ADP3110AKRZ-RL IC MOSFET DRIVER DUAL 12V 8SOIC
相关代理商/技术参数
ADE7762 制造商:AD 制造商全称:Analog Devices 功能描述:Polyphase Energy Metering IC with Phase Drop Indication
ADE7762ARW 制造商:AD 制造商全称:Analog Devices 功能描述:Polyphase Energy Metering IC with Phase Drop Indication
ADE7762ARW-RL 制造商:AD 制造商全称:Analog Devices 功能描述:Polyphase Energy Metering IC with Phase Drop Indication
ADE7762ARWZ 功能描述:IC ENERGY METERING 3PHASE 28SOIC 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:*
ADE7762ARWZ-RL 功能描述:IC ENERGY METERING 3PHASE 28SOIC 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:*
ADE7763 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Active and Apparent Energy Metering IC
ADE7763_13 制造商:AD 制造商全称:Analog Devices 功能描述:Single-Phase Active and Apparent Energy Metering IC
ADE7763ARS 制造商:Analog Devices 功能描述:Energy Measurement 20-Pin SSOP 制造商:Rochester Electronics LLC 功能描述:1 PHASE ACTIVE AND APPARENT ENERGY IC - Bulk