收藏本站

Data Sheet
ENERGY-TO-FREQUENCY CONVERSION
The ADE7953 provides two energy-to-frequency conversions for
calibration purposes. After initial calibration at manufacturing,
the manufacturer or end customer is often required to verify the
meter accuracy. One convenient way to do this is to provide an
output frequency that is proportional to the active, reactive, or
apparent power, or to the current rms under steady load condi-
tions. This output frequency provides a simple single-wire
interface that can be optically isolated to interface to external
calibration equipment. The ADE7953 includes two fully
programmable calibration frequency output pins: CF1 (Pin 23)
and CF2 (Pin 24). The energy-to-frequency conversion is
illustrated in Figure 57.
CFxSEL BITS
IN CFMODE REGISTER
ADE7953
The CF1 and CF2 pins can be configured to output a signal that
is proportional to the active power, reactive power, apparent
power, or IRMS on Current Channel A or Current Channel B.
In addition, it is possible to configure CF1 and CF2 to output a
signal that is proportional to the sum of the Current Channel A
IRMS and the Current Channel B IRMS, or, alternatively, propor-
tional to the sum of the active power on Current Channel A and
the active power on Current Channel B. Recalibration is required
in this configuration because the actual CF output equals the sum
of the active power on Current Channel A and the active power
on Current Channel B, divided by 2. The CF1 and CF2 output
pins are programmed by setting the CF1SEL and CF2SEL bits
in the CFMODE register (Address 0x107).
VA
IRMS
VAR
WATT
IRMSA + IRMSB
AWATT + BWATT
DFC
1
÷
CFxDEN
CFx PULSE
OUTPUT
Both pulse outputs (CF1 and CF2) are disabled by default
and can be enabled by clearing the CF1DIS and CF2DIS bits,
respectively, in the CFMODE register (Address 0x107).
PULSE OUTPUT CHARACTERISTICS
Figure 57. Energy-to-Frequency Conversion
Two digital-to-frequency converters (DFCs) are used to generate
the pulse outputs. The DFC generates a pulse each time ±1 LSB
is accumulated in the energy register. An output pulse is gener-
ated when CFxDEN number of pulses is generated at the DFC
output.
The pulse outputs for both DFCs stay low for 80 ms if the pulse
period is longer than 160 ms (6.25 Hz). If the pulse period is
shorter than 160 ms, the duty cycle of the pulse outputs is 50%.
The pulse outputs are active low. The maximum output frequency
with ac inputs at full scale and with CFxDEN = 0x00 is approxi-
mately 206.9 kHz.
The ADE7953 includes two unsigned 16-bit registers, CF1DEN
(Address 0x103) and CF2DEN (Address 0x104) that control the
CF output frequency on the CF1 and CF2 pins, respectively. The
16-bit frequency scaling registers can scale the output frequency
by 1/(2 16 – 1) to 1 with a step of 1/(2 16 – 1). Note that when
modifying the CF1DEN and CF2DEN registers, two sequential
write operations must be performed to ensure that the write is
successful.
Rev. B | Page 33 of 72
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-ADF4002EBZ1 BOARD EVAL FOR ADF4002
EVAL-ADG788EBZ BOARD EVALUATION FOR ADG788
EVAL-ADM1021AEB BOARD EVAL FOR ADM1021
EVAL-ADM1023EB BOARD EVAL FOR ADM1023
EVAL-ADM1031EB BOARD EVAL FOR ADM1031
EVAL-ADM1062TQEBZ BOARD EVALUATION FOR ADM1062TQ
EVAL-ADM1075CEBZ BOARD EVAL FOR ADM1075
EVAL-ADM1087EBZ BOARD EVALUATION FOR ADM1087
相关代理商/技术参数
EVAL-ADF4001EBZ2 制造商:Analog Devices 功能描述:Evaluation Board For Pll Frequency Synthesizer 制造商:Analog Devices 功能描述:ADF4001 PLL SYNTHESIZER EVAL BOARD
EVAL-ADF4002EB1 制造商:Analog Devices 功能描述:EVAL BOARD - Bulk
EVAL-ADF4002EBZ1 功能描述:BOARD EVAL FOR ADF4002 RoHS:是 类别:编程器，开发系统 >> 评估演示板和套件 系列:- 产品培训模块:Obsolescence Mitigation Program 标准包装:1 系列:- 主要目的:电源管理，电池充电器 嵌入式:否 已用 IC / 零件:MAX8903A 主要属性:1 芯锂离子电池 次要属性:状态 LED 已供物品:板
EVAL-ADF4007EBZ1 功能描述:BOARD EVALUATION FOR ADF4007EB1 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-ADF4106EB1 制造商:Analog Devices 功能描述:PLL, Frequency Synthesizer
EVAL-ADF4106EBZ1 功能描述:BOARD EVAL FOR ADF4106 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-ADF4108EB1 制造商:AD 制造商全称:Analog Devices 功能描述:PLL Frequency Synthesizer
EVAL-ADF4108EBZ1 制造商:Analog Devices 功能描述:Evaluation Board For ADF4108 制造商:Analog Devices 功能描述:ADF4108 Evaluation Board 制造商:Analog Devices 功能描述:ADF4108, PLL FREQUENCY SYNTHESIZER, EVAL BOARD; Silicon Manufacturer:Analog Devices; Silicon Core Number:ADF4108; Kit Application Type:Clock & Timing; Application Sub Type:PLL Frequency Synthesizer; MCU Supported Families:ADF4108 ;RoHS Compliant: Yes