Datasheet > SA9903B_17

SA9903B_17

更新时间： 2025-03-21 01:22:19

品牌	Logo	应用领域
SAMES		/
页数	文件大小	规格书
17页	530K
描述
Single Phase Multifunction Energy Metering IC

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中文翻译

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数据手册

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SA9903B_17 数据手册

Single Phase Multifunction Energy Metering IC

with SPI Interface

SA9903B

FEATURES



Protected against ESD



Bidirectional active and reactive power/energy

measurement

Total power consumption rating below 25mW

Adaptable to different current sensor technologies

Operates over a wide temperature range

Precision on-chip voltage reference

Measures AC inputs only



RMS voltage and frequency measurement

SPI communication bus

Meets the IEC 61036 Specification requirements for

Class 1 AC Watt hour meters



Meets the IEC 61268 Specification requirements for

Class 2 AC VAR hour meters

DESCRIPTION

The SA9903B is a single phase bidirectional energy/power

metering integrated circuit that has been designed to

measure active and reactive energy, RMS mains voltage and

mains frequency. The SA9903B has an integrated SPI serial

interface for communication with a microcontroller. Measured

values for active and reactive energy, the mains voltage and

frequency are accessible through the SPI interface from 24

bit registers. The SA9903B active and reactive energy

registers are capable of holding at least 52 seconds of

accumulated energy at full load. A mains voltage zero

crossover is available on the FMO output.

The SA9903B includes all the required functions for single

phase power and energy measurement such as

oversampling A/D converters for the voltage and current

sense inputs, power calculation and energy integration. This

innovative universal single phase power/energy metering

integrated circuit is ideally suited for energy calculations in

applications such as electricity dispensing systems,

residential metering and factory energy metering and control.

The SA9903B integrated circuit is available in a 20 pin small

outline (SOIC20) RoHS compliant package.

TEST

VDD

POWER ON

RESET

IIP

IIN

DIGITAL

OUTPUT

SIGNAL PROCESSING

CURRENT

CHANNEL

ADC

Instantaneous

power

Instantaneous

power

ACTIVE POWER

REACTIVE POWER

90 DEGREE

PHASE SHIFT

FREQUENCY

FMO

IVP

DIGITAL

OUTPUT

VOLTAGE

CHANNEL

ADC

VRMS

CALCULATION

AGND

VOLTAGE REFERENCE

AND

OSCILLATOR

SPI INTERFACE

AND

CURRENT BIASING

TIMING

VREF

OSC1

OSC2

SCK

VSS

Figure 1: Block diagram

SPEC-0051 (REV. 5)

29-09-2017

1/17

12 3 4 5 6 7...17

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