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SA9602MSA 参数 Datasheet PDF下载

SA9602MSA图片预览
型号: SA9602MSA
PDF下载: 下载PDF文件 查看货源
内容描述: 单相功率/电能计量IC,具有可选择的脉冲率机械显示应用 [SINGLE PHASE POWER/ENERGY METERING IC WITH SELECTABLE PULSE RATE FOR MECHANICAL DISPLAY APPLICATIONS]
分类和应用: 脉冲光电二极管机械
文件页数/大小: 16 页 / 176 K
品牌: SAMES [ SAMES ]
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SA9602M  
FUNCTIONAL DESCRIPTION  
The SA9602M is a CMOS mixed signal Analog/Digital integrated circuit, which performs  
power/energy calculations across a power range of 1000:1, to an overall accurancy of  
better than Class 1.  
The integrated circuit includes all the required functions for 1-phase power and energy  
measurement such as two oversampling A/D converters for the voltage and current  
sense inputs, power calculation and energy integration. Internal offsets are eliminated  
through the use of cancellation procedures. The SA9602M generates pulses, the  
frequency of which is proportional to the power consumption. Two frequency outputs  
(MOTOR and LED) are available. The pulse rate follows the instantaneous power  
consumption measured.  
The motor drive pin can be configured as a unipolar or bipolar output using input MD. This  
choice allows the manufacturer to use either an impulse counter (unipolar) or stepper  
motor (bipolar).  
1. Power Calculation  
In the Application Circuit (Figure 1), the voltage drop across the shunt will be  
between 0 and 16mVRMS (0 to 80A through a shunt resistor of 200µ). This voltage  
is converted to a current of between 0 and 16µARMS, by means of resistors R1 and  
R2.  
The current sense input saturates at an input current of ±25µA peak.  
For the voltage sensor input, the mains voltage (230VAC) is divided down through  
a divider to 14VRMS. The current into the A/D converter input is set at 14µARMS at  
nominal mains voltage, via resistor R4 (1MΩ).  
Different pulse rates are available at the motor drive pin. The device may be  
programmed for a 1 pulse/kWh, 10 pulses/kWh or 100 pulses/kWh output,  
depending on the status of the motor pulse rate select pins MPD and MP1.  
The LED pulse rate is fixed at 1000 pulses/kWh. The frequency of the motor drive  
and LED pin is dependant on the settings of R0 and R1 which allow selection of  
different rated conditions. Rated conditions such as 230V/40A, 230V/60A, 230V/  
80A and 230V/100A may be chosen. This facility allows meter manufacturers to  
cater for a wide range of metering applications with minimal design changes.  
2. Analog Input Configuration  
The input circuitry of the current and voltage sensor inputs are illustrated below.  
These inputs are protected against electrostatic discharge through clamping  
diodes.  
The feedback loops from the outputs of the amplifiers AI and AV generate virtual  
shorts on the signal inputs. Exact duplications of the input currents are generated  
for the analog signal processing circuitry.  
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