Single Channel Single Phase Energy

Metering IC

SPEC-1587 (REV. 5)

1/18

29-09-2017

SA4106A

FEATURES



Meets the IEC62053, CBIP-88 and IS137799-1999

specification requirements for Class 1 AC static watt-

hour meters for active energy



Motor drive outputs (MOP, MON) provide average active

power information and can drive an electro-mechanical

counter or an impulse counter directly



LED pulse output for calibration purposes supplies

average active power information



Configurable for different meter ratings



Unidirectional

or

bidirectional

power

and

energy

measurement



Precision on-chip oscillator (70ppm/°C drift)



Precision on-chip voltage reference (10ppm/°C drift)





Anti-creep state indicator pin



Low power consumption (<20mW typical)



Measures AC inputs only

DESCRIPTION

The SA4106A is an accurate single phase power/energy

metering integrated circuit providing a single chip solution for

single phase energy meters. Very few external components

are required and the chip includes a direct drive capability for

electro-mechanical counters. The SA4106A does not require

an external crystal or voltage reference. A precision oscillator

and a precision voltage reference to supply the circuitry with

a stable frequency and stable reference currents are

integrated on the chip.

The SA4106A metering integrated circuit generates a pulse

output, the frequency of which is proportional to the active

power consumption.

Programmable inputs allow the meter manufacturer to

configure the SA4106A for different meter maximum currents

the stepper motor counter or impulse counter gear ratio. The

LED pulse output follows the average active power

consumption measured and is intended for meter calibration

purposes. In fast calibration mode this output provides a high

frequency pulse rate following the average active power

consumption and can be used for fast calibration or to

interface with a microcontroller.

The SA4106A includes an anti-creep feature preventing any

creep effects in the meter under no-load conditions. The anti-

anti-creep function can also be disabled.

The SA4106A integrated circuit is available in a 20 pin small

outline (SOIC20) RoHS compliant package.

Figure 1: Block diagram

VREF

VSS

MON

MOP

COUNTER

DRIVE

BUFFERS

DIVISION

FOR

COUNTER OUTPUT

OSCILLATOR

AND

TIMING

VOLTAGE REFERENCE

AND

CURRENT BIASING

VOLTAGE

CHANNEL

ADC

CURRENT

CHANNEL

ADC

AGND

IVP

IIN

IIP

VDD

POWER ON

RESET

DIGITAL

OUTPUT

DIGITAL

OUTPUT

Instantaneous

power

SIGNAL PROCESSING

Average

power

ACSEL

DIRI

DIRO

DIVISION

FOR

CALIBRATION

LED OUTPUT

LED

R0

R1

R2

R3

FMS

PIN STATE

DETECTION

PULSE

GENERATION

ACST

LPF