參數(shù)資料
型號： AD22151YR-REEL
廠商： ANALOG DEVICES INC
元件分類： 磁阻傳感器
英文描述： MAGNETIC FIELD SENSOR-HALL EFFECT, -60-60mT, 0.45-5.40V, RECTANGULAR, SURFACE MOUNT
封裝： MS-012AA, SOIC-8
文件頁數(shù)： 4/8頁
文件大?。?/td> 264K
代理商： AD22151YR-REEL
REV. A
–4–
AD22151
FIELD – Gauss
–600
400
–400
–200
0
200
0
DEL
T
A
SIGNAL
–
V
0.005
0.010
0.015
0.020
0.025
600
Figure 5. Signal Drift over Temperature (–40
∞C to
+150
∞C) vs. Field (–200 ppm); 5 V Supply
TEMPERATURE – C
0.25
%
GAIN
0.20
0
0.15
0.05
0.10
–40
10
60
110
160
–0.05
Figure 6. Gain Variation from 25
∞C vs. Temperature
(–200 ppm) Field; R1 –15 k
W
FIELD – Gauss
–600
400
–400
–200
0
200
DEL
TA
SIGNAL
–
V
0
0.010
0.015
0.020
0.025
600
0.005
0.045
0.040
0.030
0.035
–800
800
Figure 7. Signal Drift over Temperature (–40
∞C to
+150
∞C) vs. Field (–2000 ppm); 5 V Supply
TEMPERATURE – C
2.0
1.8
1.0
1.6
1.2
1.4
–40
10
60
110
160
–0.2
0.8
0.6
0.4
0.2
0
%
GAIN
Figure 8. Gain Variation (from 25
∞C) vs. Temperature
(–2000 ppm Field; R1 = 12 k
W)
TEMPERATURE COMPENSATION
The AD22151 incorporates a “thermistor” transducer that
detects relative chip temperature within the package. This
function provides a compensation mechanism for the various
temperature dependencies of the Hall cell and magnet combina-
tions. The temperature information is accessible at Pins 1 and
2 (
+2900 ppm/
∞C) and Pin 3 ( –2900 ppm/∞C), as repre-
sented by Figure 9. The compensation voltages are trimmed
to converge at VCC/2 at 25
∞C. Pin 3 is internally connected to
the negative TC voltage via an internal resistor (see the Func-
tional Block Diagram). An external resistor connected between
Pin 3 and Pins 1 or 2 will produce a potential division of the
two complementary TC voltages to provide optimal compensa-
tion. The Pin 3 internal resistor provides a secondary TC
designed to reduce second order Hall cell temperature sensitivity.
TEMPERATURE – C
1.0
VOLTS
–
Reference
0.8
0
0.6
0.2
0.4
150
112
74
–2
–40
–0.2
–0.4
–0.6
–0.8
–1.0
36
TC1, TC2 VOLTS
TC3 VOLTS
Figure 9. TC1, TC2, and TC3 with Respect to Reference
vs. Temperature
The voltages present at Pins 1, 2, and 3 are proportional to the
supply voltage. The presence of the Pin 2 internal resistor dis-
tinguishes the effective compensation ranges of Pins 1 and 2.
(See temperature configuration in Figures 1 and 2, and typical
resistor values in Figures 10 and 11.)
Variation occurs in the operation of the gain temperature com-
pensation for two reasons. First, the die temperature within the
package is somewhat higher than the ambient temperature due
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