AMPLIFIER AND PROTECTION IC
FEATURES
•
Supply Voltage Range: 6...35V
•
Wide Operating Temperature Range:
–40°C...+85°C
•
Voltage Reference: 5V
•
Additional Voltage/Current Source
•
Operational Amplifier Stage with Inte-
grated Driver Output
•
Adjustable Gain
•
Adjustable Output Voltage Range e.g.
0...5/10V, others
•
Reverse Polarity Protection
•
Short Circuit Protection
•
Output Current Limitation
•
Low-Cost: Replaces a Multitude Number
of Discrete Components
AM461
DESCRIPTION
The AM461 is a universal useable amplifier and
protection IC with a multitude of additional func-
tions. The IC contains of an externally adjustable
operational amplifier for conditioning of single
ended input signals. This amplifier has an inte-
grated output driver stage with the ability to source
up to 5mA without the need of any external tran-
sistor. In addition, a voltage reference for the supply
of external components and another operational
amplifier that can be used as current/voltage source
or comparator is integrated.
Basic features of the IC are the wide range inte-
grated of protection functions. The IC is protected
against reverse polarity and has a build-in output
current limitation. Using the amplifier IC AM461 it
is possible to generate stable standard voltages ranges
(e.g. 0-5/10V) in an easy and low-cost way.
BLOCK DIAGRAM
CVREF
1
8
VREF
AM461
CVSET
2
OP2
V
BG
INP
3
Voltage Reference
6
VCC
OP1
5
VOUT
7
GND
INN
4
Figure 1:
Block diagram AM461
analog microelectronics
October 2002
3/8
AME [ ANALOG MICROELECTRONICS ]
