A6850 데이터 시트보기 (PDF) - Allegro MicroSystems
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A6850 Datasheet PDF : 9 Pages
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A6850
Dual Channel Switch Interface IC
Applications Information
Two-Wire Sensor Interfacing
When voltage is applied to two-wire Hall effect sensors,
current flows within one of two narrow ranges. Any current
level not within these ranges indicates a fault condition.
The following table describes some of the possible output
conditions that can be monitored through the SENSE pins.
Figure 2 is a typical application using the A6850 with dual
Hall effect sensors.
Signal and Fault Table
Condition
Output Pin Current
(mA)
OUTPUT Pin Short-to-Ground
25 to 45
Logic High from Hall Sensor
12 to 17
Short-to-Battery
0.0
Logic Low from Hall Sensor*
2 to 6.9
Thermal Shutdown
0.0
OUTPUT Pin Open
0.0
*This current range includes all A114x and A118x sensors.
Sense Pin Current
(mA)
2.5 to 4.5
1.2 to 1.7
0.0
0.2 to 0.69
0.0
0.0
Sense Pin Voltage,
Rsense= 1.5 kΩ
(V)
3.75 to 6.75
1.8 to 2.55
0
0.3 to 1.04
0
0
VCC
VIN
Digital Output
Digital Output
Controller
ADC
ADC
VCC or
VBAT
RSENSE1
1.5 kΩ
1 µF
1
3
ENABLE1
ENABLE2
5
VIN OUTPUT1 8
2
4
SENSE1
SENSE2
A6850
OUTPUT2 6
RSENSE2
1.5 kΩ
GROUND
7
Wiring Harness
A114x or
A118x
CBYP
0.01 µF
A114x or
A118x
CBYP
0.01 µF
Figure 2. Typical Application with 2-Wire Hall Effect Sensors
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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