CS5462 datasheet(16/18 Pages) CIRRUS

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CS5462

4.8

Basic Application Circuit

Configurations

Figure 9 shows the CS5462 configured to measure

power in a single-phase 2-wire system while oper-

ating in a single supply configuration. In this dia-

gram, the shunt resistor used to monitor the line

current is connected on the “Line” (hot) side of the

power mains. In most residential power metering

applications, the power meter’s current-sense

shunt resistor is intentionally placed on the hot side

of the power mains in order to detect a subscriber’s

attempt to steal power. In this type of shunt-resistor

configuration, the common-mode level of the

CS5462 must be referenced to the hot side of the

power line. This means that the common-mode po-

tential of the CS5462 will typically oscillate to very

high voltage levels, as well as very low voltage lev-

els, with respect to earth ground potential.

Jumpers

for

Calibration,

Freq Select

and

Gain Select

Mechanical

Counter

DGND / P1

EDIR / P4

VD+ / P7

NEG / P2

CAL0

CAL1

FREQ

IGAIN

EOUT

FOUT / P6

XOUT

XIN

CPUCLK

DGND

VA-

VREFOUT

VREFIN

IIN+

IIN-

VIN-

VIN+

AGND

120 VAC

10 Ω

500 Ω

470 nV

+100 µF

0.1 µF

SHUNT

0.1 µF

AGND

VA+

E2 / P4

E1 / P5

I+

I-

V-

Idiff

Vdiff

V-

V+

I+

I-

Stepper

Motor

Figure 8. Typical Connection Diagram

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