Datasheet

Industrial V/I Converter and Protector IC
AM462
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz Oktober 2007 – Rev.2.5 -Page 3/20
Phone: [phone]
Fax: [phone]
Internet:
http://www.analogmicro.de
Email: [e-mail]
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
• Adjustable amplification
• Adjustable offset
• Industrial current output (e.g.
0/4...20mA)
• Protection against reverse polarity
• Short-circuit protection
• Output current limitation
• Low-cost device: replaces a number of
discrete elements
• 2- and 3-wire operation
• Individually configurable function
modules
• RoHS compilant
GENERAL DESCRIPTION
AM462 is a universal V/I converter and
amplifier IC with a number of additional
functions. The IC basically consists of an
amplifier, whose gain can be set externally,
and an output stage which can convert voltage
signals referenced to ground to industrial
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 and has a
built-in output current limit. Converter IC
AM462 enables industrial current loop signals
(e.g. of 0/4–20mA) to be produced relatively
easily.
Using the Frame ASIC concept [1] the IC can
be connected up to a processor for signal
correction.
BLOCK DIAGRAM
Figure 1: Block diagram of AM462 (individually configurable function modules)
VREF
SET
OUTAD INDAI
GND
VSET
INN
INP
IOUT
RS+
VCC
CVREF
CVSET
V
BG
4
3
14
11
10
8
16
V
I
13
15
Voltage Reference
1
6
OP1
5
2
AM462
OP2
RS-
9