A1201, A1202,
A1203, and A1204
Continuous-Time Bipolar Switch Family
The choice between continuous-time and chopper-stabilized
designs is solely determined by the application. Battery manage-
ment is an example where continuous-time is often required. In
these applications, V
CC
is chopped with a very small duty cycle
in order to conserve power (refer to figure 4). The duty cycle
is controlled by the power-on time, t
PO
, of the device. Because
continuous-time devices have the shorter power-on time, they
are the clear choice for such applications.
For more information on the chopper stabilization technique,
refer to Technical Paper STP 97-10,
Monolithic Magnetic Hall
Sensor Using Dynamic Quadrature Offset Cancellation
and
Technical Paper STP 99-1,
Chopper-Stabilized Amplifiers with a
Track-and-Hold Signal Demodulator.
ADDITIONAL APPLICATIONS INFORMATION
Extensive applications information for Hall-effect sensors is
available in:
•
Hall-Effect IC Applications Guide,
Application Note 27701
•
Hall-Effect Devices: Gluing, Potting, Encapsulating, Lead
Welding and Lead Forming,
Application Note 27703.1
•
Soldering Methods for Allegro’s Products – SMT and Through-
Hole,
Application Note 26009
All are provided in
Allegro Electronic Data Book,
AMS-702,
and the Allegro Web site, www.allegromicro.com.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
10
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