4 mA to 20 mA

CURRENT LOOP

C1

+IN

-IN

+

-

Preamplifier

Output Buffer

Gain = K2

A1

A2

Gain = 10

OFFSET

Internal

Resistor

100 k:

OUT

Level

shift

1

5

3

4

7

8

LMP8601, LMP8601-Q1

SNOSAR2E – SEPTEMBER 2008 – REVISED MARCH 2013

www.ti.com

CURRENT LOOP RECEIVER APPLICATION

Many industrial applications use 4 to 20 mA transmitters to send a sensor’s analog value to a central control

room. The LMP8601/LMP8601Q can be used as a current loop receiver as shown in Figure 45.

K2 = 2

Figure 45. Current Loop Receiver Application

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