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AM402

Description
CURRENT CONVERTER IC
File Size112KB,8 Pages
ManufacturerAnalogMicroElectronics,Inc.(AME)
AMT was founded in Taiwan in November 2000 and merged into AMT Microelectronics, Inc., a US company located in Silicon Valley, California, USA. Its stock was officially listed for public trading in March 2004.
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AM402 Overview

CURRENT CONVERTER IC

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CURRENT CONVERTER IC
FEATURES
Wide Supply Voltage Range: 6...35V
Wide Operating Temperature Range:
–40°C...+85°C
Adjustable Reference Voltage
Source: 4.5 to 10V
Wide Common Mode Range Instru-
mentation Amplifier
Adjustable Gain and Offset
Two–Wire Output: 4...20mA
Three–Wire Output: 0/4...20mA
Adjustable Output Current Range
Protection Against Reverse Polarity
Current Shutdown with Overvoltage
Shutdown with Excessive Tempera-
ture
AM402
GENERAL DESCRIPTION
AM402 is a monolithically integrated current
converter which has been specially developed
for the processing of differential bridge sig-
nals. AM402 is suitable for two- and three-
wire applications and has four function blocks.
A high-precision instrumentation amplifier
(IA) serves as an input stage. A reference volt-
age source, which can be adjusted to values of
between 4.5 and 10V, excites external compo-
nents and a voltage-controlled current output
stage converts the voltage signal. It is thus
possible to generate output currents which cor-
respond to the normal industrial standards
(0/4–20mA, 12
±
8mA).
DELIVERY
APPLICATIONS
Industrial Process Control
Sensor Signal Converter (e.g. pressure)
Programmable Current Source
DIL16 packages (samples)
SO16(n) packages
Dice on 5“ blue foil
BLOCK DIAGRAM
GAIN− GAIN GAIN+
10 11 12
VSET
13
VREF
16
AM402
Reference Voltage
1
2
3
9
IN+
8
IN−
14
GND
7
SET
Instrumentation
Amplifier
V
I
RS+
VCC
RS−
OUT
5
Figure 1
analog microelectronics
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
Internet: www.analogmicro.de
Phone: +49 (0)6131/91 073 – 0
Fax:
+49 (0)6131/91 073 – 30
E–Mail: info@analogmicro.de
April 99
1/8
Rev. 2.1
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