AM452 – Voltage-to-current transducer IC
with a differential input
PRINCIPLE FUNCTION
Amplification and conversion of differential input voltages (±400mV with a CMIR
of 1.5 – V
CC
-3V) into an adjustable current output of 0/4...20mA, for example. The
offset and maximum output currents are independently adjustable in a wide range.
The IC is suitable for both 2- and 3-wire applications and as a HART
®
carrier IC.
V
CC
= 6…35V
Differential input
±
400
mV
AM452
I
OUT
= z.B.0/4...20mA
V
REF
= 5/10V
I
S
= max 10mA
TYPICAL APPLICATIONS
Transducers for differential input signals in current output values for:
•
•
•
•
•
Transducers for sensor applications with an internal sensing element supply
Drivers for the analog industrial power grid (e.g. remote display in current loop operation)
Differential impedance converters
Carrier for standard HART
®
protocol communications
Modular signal conditioning with digital correction (Frame concept [1])
Phone: +49 (0)6131/91 073-0
Fax:
+49 (0)6131/91 073-30
Internet:
http://www.analogmicro.de
Email: info@analogmicro.de
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
February 2008 - Rev 1.2 - Page 1/21
AME [ ANALOG MICROELECTRONICS ]
