AM447 Datasheet, PDF (1/6 Pages) List of Unclassifed Manufacturers – High Precision Instrumentation Amplifier

High Precision Instrumentation Amplifier
AM447
FEATURES
• Very Low Offset Voltage: < 25µV
• Low Input Bias Current: ≤ 5nA
• High Input Sensitivity
• High CMRR: > 90dB min
• Wide Operating Temperature Range:
–40°C...+140°C
• Adjustable Rail–to–Rail Voltage Out-
put Stage: 0.5...4.5V
• Single Supply Device (ratiometric)
• Integrated Source and Sink Capabil-
ity: ±2mA
• Low Noise Behaviour
APPLICATIONS
• Small Signal (Bridge) Amplifier
Low Pressure Sensors
Automotive Applications
DMS Interface
Interface for Ceramic Sensors
• High Precision Amplifier
Medical Instrumentation
Data Acquisition
GENERAL DESCRIPTION
The AM447 is a high precision amplifier, de-
signed for amplification of sensor bridge sig-
nals up to 35mV full scale. The single supply
circuit consists of a high precision instrumen-
tation amplifier (IA) and an integrated ra-
tiometric output stage. Input offset voltages
less than ±25µV (±1µV/°C) are adjustable by
only two externally trimmable resistors. The
monitoring of the amplified signal is possible
at the output of the IA and makes the adjust-
ment easier. With the externally adjustable
gain of the output stage, the AM447 can be
used for different signal sources. The 2mA
sink and source capability makes it ideal for
high precision applications specially in the
field of automotive sensors.
DELIVERY
• DIL16 packages (samples, small quantities)
• SO16(n) packages
• Dice on 5“ blue foil
BLOCK DIAGRAM
OC1
1
AM447
OC2
2
VCC
14
IN+
4
IA
IN-
3
Output
Stage
1k
19k _VCC
OUT
10
GAIN
11
58
6
12
9
7
RSET VREFIN VREF IAOUT ^VSET GND
Figure 1
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 2000
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Rev. 2.1