71M6543HT-IGTSLASHF datasheet(22/75 Pages) MAXIM

22 / 75 page

Maxim Integrated │ 22

71M6543FT/71M6543HT/

71M6543GT/71M6543GHT

Energy Meter ICs

www.maximintegrated.com

Figure 3. 71M6543FT/HT/GT/GHT Operating with Remote Sensor for Neutral Current

used with CTs, or may be enabled to interface to a remote

71M6x03 isolated current sensor providing isolation for a

shunt resistor sensor using a low cost pulse transformer.

The remaining inputs (VADC8-VADC10) are single-ended

and sense line voltage. These single-ended inputs are

referenced to the VV3P3A pin.

All analog signal input pins measure voltage. In the

case of shunt current sensors, currents are sensed as

a voltage drop in the shunt resistor sensor. Referring

to Figure 2, shunt sensors can be connected directly

to the 71M654xT (referred to as a ‘local’ shunt sensor)

or connected via an isolated 71M6x03 (referred to as a

‘remote’ shunt sensor) (Figure 3). In the case of current

transformers, the current is measured as a voltage across

a burden resistor that is connected to the secondary

winding of the CT. Meanwhile, line voltages are sensed

through resistive voltage dividers.

Pins IADC0-IADC1 can be programmed individually to be

differential or single-ended. For most applications IADC0-

IADC1 are configured as a differential input to work with

a shunt or CT directly interfaced to the IADC0-IADC1

differential input with the appropriate external signal con-

ditioning components.

∑ ADC

CONVERTER

VREF

MUX

VREF

VADC

FIR

IADC0

VADC8 (VA)

IADC1

CE RAM

LOCAL

SHUNT

IN*

VADC9 (VB)

VADC10 (VC)

REMOTE

SHUNT

71M6543FT/HT/GT/GHT

71M6x03

* IN = OPTIONAL NEUTRAL CURRENT

IADC6

IADC7

INP

INN

DIGITAL

ISOLATION

INTERFACE

REMOTE

SHUNT

71M6x03

IADC4

IADC5

INP

INN

DIGITAL

ISOLATION

INTERFACE

REMOTE

SHUNT

71M6x03

IADC2

IADC3

INP

INN

DIGITAL

ISOLATION

INTERFACE

71M6543HT-IGT/F bảng dữ liệu(PDF) 22 Page - Maxim Integrated Products

71M6543HT-IGT/F bảng dữ liệu(HTML) 22 Page - Maxim Integrated Products

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75

bảng dữ liệu tải về

Link URL