AD22055_15 Datasheet, PDF (1/4 Pages) Analog Devices – Single Supply Bridge Transducer Amplifier

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FEATURES
Gain of 400. Alterable from 40 to 1000
Output Span 20 mV to (V_S – 0.25) V
1 Pole Low-Pass Filtering Available
Offset Capability
Differential Input Resistance 230 k⍀
Drives 1 k⍀ Load to +4 V Using V_S = +5 V
Supply Voltage: +3 V to +36 V
Transient Spike Protection and RFI Filters Included
Peak Input Voltage (40 ms): 60 V
Reversed Supply Protection: –34 V
Operating Temperature Range: –40؇C to +125؇C
APPLICATIONS
Interface for Pressure Transducers, Position
Indicator, Strain Gages and Other Low Level Signal
Sources
Single Supply Bridge
Transducer Amplifier
AD22055
FUNCTIONAL BLOCK DIAGRAM
+V_S OFS
6
7
FILT
3
AD22055
IN+ 8
A1
IN– 1
A2
5 OUT
2
GND
4 GAIN
GENERAL DESCRIPTION
The AD22055 accepts a differential signal from a bridge trans-
ducer whose common-mode signal can be anywhere between
the power supplies.
V_REF
The extended temperature range allows for local signal condi-
tioning for oil and hydraulic pressure sensors as well as other
automotive sensors.
The use of an external gain resistor allows the user to compen-
sate transducer gain error and temperature drift.
+5 VOLT
OUTPUT
8765
IN+ OFS +V_S OUT
AD22055
IN– GND FILT GAIN
1234
1kΩ
GAIN = 400
ANALOG
GROUND
Figure 1. Typical Application Circuit for a Pressure Sensor Interface
REV. 0
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