AD22050N Analog Devices Inc, AD22050N Datasheet

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AD22050N

Manufacturer Part Number
AD22050N
Description
IC AMP DIFF SNGL-SUP 8DIP
Manufacturer
Analog Devices Inc
Type
Sensor Interfacer
Datasheet

Specifications of AD22050N

Rohs Status
RoHS non-compliant
Input Type
Voltage
Output Type
Analog
Interface
Differential
Current - Supply
200µA
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)

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Quantity
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AD22050N
Manufacturer:
Analog Devices Inc.
Quantity:
266
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a
GENERAL DESCRIPTION
The AD22050 is a single-supply difference amplifier for ampli-
fying and low-pass filtering small differential voltages (typically
100 mV FS at a gain of 40) from sources having a large common-
mode voltage.
Supply voltages from +3.0 V to +36 V can be used. The input
common-mode range extends from below ground to +24 V using
REV. C
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
FEATURES
Gain of
Input CMR from Below Ground to 6
Output Span 20 mV to (V
1-, 2-, 3-Pole Low-Pass Filtering Available
Accurate Midscale Offset Capability
Differential Input Resistance 400 k
Drives 1 k
Supply Voltage: +3.0 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
Current Sensing
Motor Control
Interface for Pressure Transducers, Position Indicators,
Strain Gages, and Other Low Level Signal Sources
20. Alterable from
Load to +4 V Using V
+V
CMOS DRIVER
CHASSIS
S
(CAR BATTERY)
Figure 1. Typical Application Circuit for a Current Sensor Interface
S
– 0.2) V
1 to
S
= +5 V
160
(V
S
– 1 V)
100m
SOLENOID
LOAD
POWER
DARLINGTON
SINGLE-POLE LOW-PASS FILTERING, GAIN: 40
AD22050
a +5 V supply with excellent rejection of this common-mode
voltage. This is achieved by the use of a special resistive attenua-
tor at the input, laser trimmed to a very high differential balance.
Provisions are included for optional low-pass filtering and gain
adjustment. An accurate midscale offset feature allows bipolar
signals to be amplified.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700
Fax: 781/326-8703
C
IN+
IN–
FUNCTIONAL BLOCK DIAGRAM
AD22050
200k
World Wide Web Site: http://www.analog.com
CORNER FREQUENCY
Single-Supply Sensor
+V
A1
= 0.796Hz- F
Interface Amplifier
S
ANALOG GROUND
OFS
+5V
ANALOG OUTPUT
4V PER AMP
A1 A2
© Analog Devices, Inc., 1999
AD22050
A2
GND
OUT

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AD22050N Summary of contents

Page 1

FEATURES Gain of 20. Alterable from 1 to Input CMR from Below Ground to 6 Output Span – 0. 1-, 2-, 3-Pole Low-Pass Filtering Available Accurate Midscale Offset Capability Differential Input Resistance 400 ...

Page 2

... V. Differential mode signals are referred All min and max specifications are guaranteed, although only those marked in boldface are tested on all production units at final test. Specifications subject to change without notice. Model Temperature Range AD22050N – +125 C AD22050R – +125 C AD22050R-Reel – +125 C *Quantities must be in increments of 2,500 pieces each ...

Page 3

ABSOLUTE MAXIMUM RATINGS* Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . +3 +36 V Peak Input Voltage (40 ms) . ...

Page 4

AD22050 is given by (10 M /R)%. Thus, the adjustment range would be 2% for 10% for etc. +IN OFS +V OUT S V AD22050 DM –IN GND A1 A2 ...

Page 5

OFS +V OUT CORNER FREQUENCY = S V AD22050 DM THAT IS, 1.59Hz- F –IN GND Figure 6. Connections for Single-Pole, Low-Pass Filter If the gain is raised using a resistor, as shown in ...

Page 6

AD22050 To produce a full-scale output gain 40 is used, adjust- able absorb the tolerance in the sense resistor. There is sufficient headroom to allow at least a 10% overrange (to +4.4 V). ...

Page 7

APPLICATION HINTS Frequency Compensation As are all closed-loop op amp circuits, the AD22050 is sensi- tive to capacitive loading at its output. However, the AD22050 is sensitive at higher output voltages due to nonlinear effects in the rail-to-rail design of ...

Page 8

AD22050 A unique method of feedback around A1, provided by R9 and R7, sets the closed-loop gain of the preamplifier to 10 (from the input pins). The feedback network is balanced by the inclu- sion of R6 and R8. The ...

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