AM402 Datasheet, PDF (1/8 Pages) Analog Microelectronics – CURRENT CONVERTER IC

CURRENT CONVERTER IC
AM402
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
APPLICATIONS
• Industrial Process Control
• Sensor Signal Converter (e.g. pressure)
• Programmable Current Source
BLOCK DIAGRAM
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
• DIL16 packages (samples)
• SO16(n) packages
• Dice on 5“ blue foil
GAIN− GAIN GAIN+
10 11 12
AM402
VSET
13
VREF
16
Reference Voltage
9
IN+
8
IN−
Figure 1
V
Instrumentation
Amplifier
14
7
GND
SET
1
RS+
2
VCC
I
3 _RS−
5
OUT
analog microelectronics
Analog Microelectronics GmbH
An der Fahrt 13, D – 55124 Mainz
Internet: www.analogmicro.de
Phone: [phone] – 0
Fax: [phone] – 30
E–Mail: [e-mail]
April 99
1/8
Rev. 2.1