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| 型号： | AD71056ARZ-RL |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | IC ENERGY METERING 1PHASE 16SOIC |
| 标准包装： | 2,500 |
| 输入阻抗： | 320 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： | 5mA |
| 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： | 16-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 16-SOIC |
| 包装： | 带卷 (TR) |
Energy Metering IC with Integrated
Oscillator and Reverse Polarity Indication
AD71056
The AD71056 is a high accuracy, electrical energy metering IC
FEATURES
On-chip oscillator as clock source
High accuracy, supports 50 Hz/60 Hz IEC62053-21
Less than 0.1% error over a dynamic range of 500 to 1
Supplies average real power on frequency outputs (F1, F2)
High frequency output (CF) calibrates and supplies
instantaneous real power
Logic output (REVP) indicates potential miswiring or
negative power
Direct drive for electromechanical counters and 2-phase
stepper motors (F1, F2)
Proprietary ADCs and DSP provide high accuracy over large
variations in environmental conditions and time
On-chip power supply monitoring
On-chip creep protection (no load threshold)
On-chip reference 2.45 V (20 ppm/°C typical) with external
overdrive capability
Single 5 V supply, low power (20 mW typical)
Low cost CMOS process
GENERAL DESCRIPTION
1
with a precise oscillator circuit that serves as a clock source to
the chip. The AD71056 eliminates the need for an external
crystal or resonator, thus reducing the overall cost of building a
meter with this IC. The chip directly interfaces with the shunt
resistor.
The AD71056 specifications surpass the accuracy requirements
as quoted in the IEC62053-21 standard.
The only analog circuitry used in the AD71056 is in the Σ-Δ
ADCs and reference circuit. All other signal processing, such as
multiplication and filtering, is carried out in the digital domain.
This approach provides superior stability and accuracy over
time and in extreme environmental conditions.
The AD71056 supplies average real power information on F1
and F2, the low frequency outputs. These outputs either directly
drive an electromechanical counter or interface with an MCU.
The high frequency CF logic output, ideal for calibration
purposes, provides instantaneous real power information.
The AD71056 includes a power supply monitoring circuit on
the V DD supply pin. The AD71056 remains inactive until the
supply voltage on V DD reaches approximately 4 V. If the supply
falls below 4 V, the AD71056 also remains inactive and the F1,
F2, and CF outputs are in their nonactive modes.
Internal phase matching circuitry ensures that the voltage and
current channels are phase matched, and the HPF in the current
channel eliminates dc offsets. An internal no load threshold
ensures that the AD71056 does not exhibit creep when no load
is present.
The part is available in a 16-lead, narrow body SOIC package.
FUNCTIONAL BLOCK DIAGRAM
V DD
1
AGND
6
AD71056
DGND
13
Σ - Δ
V2P 2
V2N 3
+
POWER
SUPPLY MONITOR
...110101...
ADC
MULTIPLIER
SIGNAL
PROCESSING
BLOCK
PHASE
CORRECTION
LPF
V1N 4
V1P 5
+
2.5V
REFERENCE
Σ - Δ
ADC
4k ?
...11011001...
INTERNAL
OSCILLATOR
Ф
HPF
DIGITAL-TO-FREQUENCY
CONVERTER
7
11
8
10
9
12
14
16
15
REF IN/OUT
RCLKIN
SCF
S0
S1 REVP CF
F1
F2
Figure 1.
1
U.S. Patents 5,745,323; 5,760,617; 5,862,069; 5,872,469; others pending.
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ?2006 Analog Devices, Inc. All rights reserved.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AD71057ARS | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| AD71057ARSRL | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| AD71057ARSZ | 制造商:Analog Devices 功能描述: |
| AD71057ARSZ-RL | 制造商:Rochester Electronics LLC 功能描述: 制造商:Analog Devices 功能描述: |
| AD71058YSTZ | 制造商:Analog Devices 功能描述: |
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