Industrial Converter and Protector IC

AM460

analog microelectronics

April 2003

6/18

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

SET Stage

Internal Gain

0.5

Input Voltage

01.15

V

Offset Voltage

±

0.5

±

1.5

mV

±

1.6

±

5µV/°C

Input Bias Current

820

nA

718

pA/°C

Protection Functions

580

635

690

mV

580

635

690

mV

Protection against reverse polarity

35

V

35

V

Current with reverse polarity

4.5

mA

System Parameters

Nonlinearity

Ideal input

0.05

0.15

%FS

BOUNDARY CONDITIONS

Parameter

Symbol

Conditions

Min.

Typ.

Max.

Unit

Sense Resistor

172738

Ω

c

⋅ 17

c

⋅ 27

c

⋅ 38

Ω

Stabilisation Resistor

354045

Ω

c

⋅ 35

c

⋅ 40

c

⋅ 45

Ω

Load Resistor

Only for 3-wire operation

0

600

Ω

Sum Gain Resistors

20

200

k

Ω

Sum Offset Resistors

20

200

k

Ω

Ceramic

1.9

2.2

5.0

µF

Output Capacitor

Only for 2-wire operation

90

100

250

nF

35

50

V

β

F

BCX54/55/56, for example

50

150

DETAILED DESCRIPTION OF FUNCTIONS

AM460 is a modular, universal converter and protector IC which has been specially developed for the condi-

tioning of voltage signals referenced to ground. It has been conceived for both 2- and 3-wire operation

dustrial applications (cf. application on page 8). The functions of AM460 are depicted in the block diagram

(Figure 2) which also illustrates how few external components are required for the operation of this particular

device. Electrical specifications for the external components are given on page 6.