柔宇融资:Ad22151线性输出磁场传感器

FEATURES FUNCTIONAL BLOCK DIAGRAM
Adjustable Offset to Unipolar or Bipolar Operation
Low Offset Drift over Temperature Range
Gain Adjustable over Wide Range
RE F
VC C/ 2
Low Gain Drift over Temperature Range
Adjustable First Order Temperature Compensation
TE M P RE F
Ratiometric to VC C O UT A M P
AD22151
APPLICATIONS
Automotive
I SO U RC E
Throttle Position Sensing
Pedal Position Sensing
Suspension Position Sensing
DE M O D S W I TC HE S
Valve Position Sensing
Industrial
Absolute Position Sensing
Proximity Sensing

VCC
GENERAL DESCRIPTION
NC
The AD22151 is a linear magnetic field transducer. The sensor
output is a voltage proportional to a magnetic field applied
R1 R 2
perpendicularly to the package top surface.
The sensor combines integrated bulk Hall cell technology and
0. 1 F
instrumentation circuitry to minimize temperature related drifts
R 3
associated with silicon Hall cell characteristics. The architecture
maximizes the advantages of a monolithic implementation while
OU TPU T
allowing sufficient versatility to meet varied application require-
ments with a minimum number of components.
AD22151
N C = NO C ON NECT
G ND
Principal features include dynamic offset drift cancellation
and a built-in temperature sensor. Designed for single 5 V
Figure 1. Typical Bipolar Configuration with Low
supply operation, the AD22151 achieves low drift offset and
(< ¨C500 ppm) Compensation
gain operation over ¨C40¡ÞC to +150¡ÞC. Temperature compensa-
tion can accommodate a number of magnetic materials commonly
utilized in economic position sensor assemblies.
VC C
The transducer can be configured for specific signal gains to R1
meet various application requirements. Output voltage can be
adjusted from fully bipolar (reversible) field operation to fully
R 4
unipolar field sensing.
NC
R2
The voltage output achieves near rail-to-rail dynamic range,
0 .1 F
capable of supplying 1 mA into large capacitive loads. The
R 3
signal is ratiometric to the positive supply rail in all configurations.

O UT PUT

AD22151
N C = NO CO NNEC T
GN D
Figure 2. Typical Unipolar Configuration with
High ( ¨C2000 ppm) Compensation
REV. A

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