Industrial Converter and Protector IC
FEATURES
•
Supply voltage: 6...35V
•
Wide working temperature range:
–40°C...+85°C
•
Adjustable integrated reference voltage
source: 4.5 to 10V
•
Additional voltage/current source
•
Operational amplifier with integrated
driver stage
•
Adjustable amplification
•
Analogue parallel voltage (0...5/10V) and
current output (0/4...20mA)
•
Protection against reverse polarity and
short-circuiting
•
Output current limit
•
Low-cost device: replaces a number of
discrete elements
•
2- and 3-wire operation
AM460
GENERAL DESCRIPTION
AM460 is a universal converter and amplifier IC
with a number of additional functions. The IC basi-
cally consists of an amplifier, whose gain can be set
externally, and parallel output stages which can con-
dition signals referenced to ground in industrial
voltage and current signals. An additional reference
voltage source for the supply of external components
is also included in the device. A further operational
amplifier can be connected up as a current source,
voltage reference or comparator.
One of the main features of the IC is its integrated
protective circuitry. The device is protected against
reverse polarity, short-circuiting and has a built-in
output current limit. Amplifier IC AM460 enables
industrial standard voltage (e.g. 0–5/10V) and cur-
rent loop (e.g. 0/4–20mA) signals to be produced
relatively easily.
BLOCK DIAGRAM
CVREF
1
VSET
13
VREF
SET
16
15
AM460
CVSET
2
I
OP2
V
BG
Voltage Reference
11
10
9
RS+
VCC
RS-
IOUT
INP
3
V
OP1
4
INN
5
OUTAD
6
7
GND
8
OP3
14
12
VOUT
INDAI INDAV
Figure 1:
Block diagram of AM460
analog microelectronics
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
Internet: http://www.analogmicro.de
Phone: +49 (0)6131/91 073 – 0
Fax:
+49 (0)6131/91 073 – 30
E–mail: info@analogmicro.de
April 2003
3/18
Rev. 1.1
AME [ ANALOG MICROELECTRONICS ]
