Programmable Back Biased Hall-Effect
Switch with TPOS Functionality
12
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
ATS636LSE
For applications it is strongly recommended that an external
ceramic bypass capacitor in the range of 0.01 糉 to 0.1 糉 be
connected between the supply and ground of the device to reduce
both external noise and noise generated by the chopper-stabi-
lization technique. (The diagram below shows a 0.1 糉 bypass
capacitor.)
The series resistor R
S
in combination with the bypass capacitor
creates a filter for EMC pulses. The series resistor will have a
drop of approximately 800 mV, this must be considered for the
minimum V
CC
requirement of the ATS636LSE. The small capaci-
tor on the output of the device improves the EMC performance
of the device. The pull-up resistor should be chosen to limit the
current through the output transistor; do not exceed the maximum
continuous output current of the device.
Note: This circuit cannot be used to program the device, as the
series resistance is too large, and a minimum capacitance of
0.1 糉 must be connected from VCC to GND of the SIP to pro-
vide the current necessary to blow the fuse.
Extensive applications information on magnets and Hall-
effect ICs including chopper stabilization is available in
the Allegro Electronic Data Book CD, or at the website:
http://www.allegromicro.com.
1.2k Ohm
V
Supply
VCC
1
R
L
100 Ohm
2
4
GND
R
S
0.1 糉
5V
VOUT
ATS636
120 pF
Typical Application:
Typical Application Circuit
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