收藏本站
PRELIMINARY TECHNICAL DATA
EVAL-ADE7758EB
ANALOG INPUTS (P4, P5, P6, P7, P8 AND P11)
Voltage and current signals are connected at the screw
terminals P4-P6 and P7-P8 and P11 respectively. All analog
input signals are filtered using the on-board anti-alias filters
before being presented to the analog inputs of the ADE7758.
The default component values which are shipped with the
evaluation board are the recommended values to be used with
the ADE7758. The user can easily change these components,
however this is not recommended unless the user is familiar
Using a CT as the current transducer
Figure 2 shows how a CT can be used as a current transducer
in one phase of a 3-phase 4-wire distribution system (Phase
A). In a three phase distribution system Phase A, Phase B and
Phase C are nominally 120° phase difference to each other.
Each phase usually requires a connection of this type for
current sensing.
with sigma-delta converters and also the criteria used for
selecting the component values for the analog input filters -
See ADE7758 datasheet.
Current sense inputs (P4, P5 and P6)
P4, P5 and P6 are two-way connection blocks which allow
ADE7758's current inputs of phase A, B and C respectively
to be connected to current transducers. Figure 1 shows the
connector P4 and the filtering network which is provided on
I max = 40A
CT
1:1800
SH1A
8 ?
JP2
SH1B
8 ?
JP4
100 ?
JP25
100 ?
JP1
JP5
1k ?
JP6
1k ?
TP2
33nF
TP4
33nF
ADE7758
IAP
355mV
rms
IAN
the evaluation board.
The resistors SH1A, SH2A, SH1B, SH2B, SH1C and
SH2C are by default not populated. They are intended to be
used as burden resistors when CTs are used as the current
transducers— see using a CT as a the current transducer .
The  RC  networks  R9/C5,  R7/C8,  R15/C9,  R13/C12,  R21/
C13, R19/C16 are used to provide phase compensation when
a Current Transformer is being used as the current transducer
with the ADE7758—see using a Current Transformer as the
current transducer. These RC networks are easily disabled by
placing JP4, JP1, JP10, JP7, JP16 & JP13 and removing C5,
C8, C9, C12, C13 and C16 (socketed).
The RC networks R10/C6, R8/C7, R16/C10, R14/C11,
R22/C14 and R20/C15 are the anti-alias filters which are
required by the on-chip ADCs. The default corner frequency
for these LPFs (Low Pass Filters) is selected as 4.8kHz (1k ?
& 33nF). These filters can easily be adjusted by replacing the
components on the evaluation board. However before adjust-
ing the component values the user should first review the
ADE7758 datasheet.
ADE7758
Full Scale
differential input = 0.5V
Figure 2 — CT connection to Current Channel
The CT secondary current is converted to a voltage by using
a burden resistance across the secondary winding outputs.
Care should be taken when using a CT as the current
transducer. If the secondary is left open, i.e., no burden is
connected, a large voltage could be present at the secondary
outputs. This can cause an electrical shock hazard and
potentially damage electronic components.
Warning!
Using a CT without a burden resistor
can lead to electrical shock.
The anti-alias filters should be enabled by opening jumpers
JP5, JP6, JP11, JP12, JP17 and JP18—see Figure 2.
Most CTs will have an associated phase shift of between 0.1°
and 1° at 50Hz/60Hz. This phase shift or phase error can lead
P4 1
P4 2
SH1A
R11
JP2
SH1B
R6
JP4
R9
100 ?
JP1
R7
100 ?
JP3
C5
33nF
C8
33nF
JP5
R10
1k ?
JP6
R8
1k ?
TP2
C6
33nF
TP4
C7
33nF
IAP
IAN
to significant energy measurement errors, especially at low
power factors. However this phase error can be corrected by
writing to the Phase Calibration registers (APHCAL,
BPHCAL and CPHCAL) in the ADE7758. The software
supplied with the ADE7758 evaluation board allows user
adjustment of the Phase Calibration register. See the Evalu-
ation Software Description for more information.
For this example, notice that the maximum analog input
range on the Current channel is set to 0.5V.
When using the ADE7758, the Gain for Current channel has
been set to 1. The maximum analog input range and gain are
Figure 1 — Current Channel on the ADE7758 evaluation
board
–2–
set via the Gain register (GAIN) — see the ADE7758 data
sheet . The evaluation software allows the user to configure the
current channel gain. This means that the maximum peak
differential signal on the current channel is 0.5V.
REV. PrB 08/03
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
EVAL-ADE7759EBZ BOARD EVALUATION FOR ADE7759
EVAL-ADE7762EBZ BOARD EVALUATION FOR ADE7762
EVAL-ADE7763ZEB BOARD EVALUATION FOR ADE7763
EVAL-ADE7816EBZ BOARD EVALUATION FOR ADE7816
EVAL-ADE7878EBZ BOARD EVAL FOR ADE7878
EVAL-ADE7880EBZ BOARD EVAL FOR ADE7880
EVAL-ADE7953EBZ BOARD EVAL FOR ADE7953
EVAL-ADF4002EBZ1 BOARD EVAL FOR ADF4002
相关代理商/技术参数
EVAL-ADE7759E 制造商:AD 制造商全称:Analog Devices 功能描述:Active Energy Metering IC with di/dt Sensor Interface
EVAL-ADE7759EB 制造商:Analog Devices 功能描述:Power Metering, Active Energy Metering IC with di/dt Sensor Interface 制造商:Analog Devices 功能描述:EVAL FOR EN METER IC W DI/DT SENS INTRFC - Bulk
EVAL-ADE7759EBZ 功能描述:BOARD EVALUATION FOR ADE7759 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081
EVAL-ADE7762EBZ 功能描述:BOARD EVALUATION FOR ADE7762 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:- 主要目的:电信，线路接口单元（LIU） 嵌入式:- 已用 IC / 零件:IDT82V2081 主要属性:T1/J1/E1 LIU 次要属性:- 已供物品:板，电源，线缆，CD 其它名称:82EBV2081
EVAL-ADE7763EB 制造商:Analog Devices 功能描述:EVALUATION BOARD DOCUMENTATION ADE7763 ENERGY METERING IC
EVAL-ADE7763ZEB 功能描述:BOARD EVALUATION FOR ADE7763 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PSoC® 主要目的:电源管理，热管理 嵌入式:- 已用 IC / 零件:- 主要属性:- 次要属性:- 已供物品:板，CD，电源
EVAL-ADE7816EBZ 功能描述:BOARD EVALUATION FOR ADE7816 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 标准包装:1 系列:PSoC® 主要目的:电源管理，热管理 嵌入式:- 已用 IC / 零件:- 主要属性:- 次要属性:- 已供物品:板，CD，电源
EVAL-ADE7854EBZ 制造商:Analog Devices 功能描述:EVALUATION BOARDS - Boxed Product (Development Kits)