A1104 Allegro MicroSystems, A1104 Datasheet

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A1104

Manufacturer Part Number
A1104
Description
(A1101 - A1106) Continuous-Time Switch Family
Manufacturer
Allegro MicroSystems
Datasheet

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Features and Benefits
▪ Continuous-time operation
▪ Stable operation over full operating temperature range
▪ Reverse battery protection
▪ Solid-state reliability
▪ Factory-programmed at end-of-line for optimum
▪ Robust EMC performance
▪ High ESD rating
▪ Regulator stability without a bypass capacitor
Packages: 3 pin SOT23W (suffix LH), and
3 pin SIP (suffix UA)
Not to scale
A1101-DS, Rev. 1
performance
▫ Fast power-on time
▫ Low noise
VCC
Regulator
Functional Block Diagram
A1101, A1102, A1103, A1104, and A1106
Gain
Amp
To all subcircuits
Continuous-Time Switch Family
Control
Trim
Description
The Allegro
are next generation replacements for the popular Allegro
312x and 314x lines of unipolar switches. The A110x family,
produced with BiCMOS technology, consists of devices that
feature fast power-on time and low-noise operation. Device
programming is performed after packaging, to ensure increased
switchpoint accuracy by eliminating offsets that can be induced
by package stress. Unique Hall element geometries and low-
offset amplifiers help to minimize noise and to reduce the
residual offset voltage normally caused by device overmolding,
temperature excursions, and thermal stress.
The A1101-A1104 and A1106 Hall-effect switches include
the following on a single silicon chip: voltage regulator,
Hall-voltage generator, small-signal amplifier, Schmitt
trigger, and NMOS output transistor. The integrated voltage
regulator permits operation from 3.8 to 24 V. The extensive
on-board protection circuitry makes possible a ±30 V absolute
maximum voltage rating for superior protection in automotive
and industrial motor commutation applications, without adding
Continued on the next page…
Offset
®
A1101-A1104 and A1106 Hall-effect switches
GND
VOUT

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A1104 Summary of contents

Page 1

... The A1101-A1104 and A1106 Hall-effect switches include the following on a single silicon chip: voltage regulator, Hall-voltage generator, small-signal amplifier, Schmitt trigger, and NMOS output transistor. The integrated voltage regulator permits operation from 3 The extensive on-board protection circuitry makes possible a ± ...

Page 2

... A1101, A1102, A1103, A1104, and A1106 Description (continued) external components. All devices in the family are identical except for magnetic switchpoint levels. The small geometries of the BiCMOS process allow these devices to be provided in ultrasmall packages. The package styles available Selection Guide Part Number ...

Page 3

... A1101, A1102, A1103, A1104, and A1106 ELECTRICAL OPERATING CHARACTERISTICS over full operating voltage and ambient temperature ranges, unless otherwise noted Characteristic Symbol 1 Supply Voltage Output Leakage Current I Output On Voltage V Power-On Time 2 3 Output Rise Time 3 Output Fall Time Supply Current Reverse Battery Current ...

Page 4

... A1101, A1102, A1103, A1104, and A1106 MAGNETIC OPERATING CHARACTERISTICS Characteristic Symbol Operate Point Release Point Hysteresis 1 Magnetic flux density indicated as a negative value for north-polarity magnetic fields, and as a positive value for south-polarity magnetic fields. This so-called algebraic convention supports arithmetic comparison of north and south polarity values, where the relative strength of the field is indicated by the absolute value of B, and the sign indicates the polarity of the field (for example, a – ...

Page 5

... A1101, A1102, A1103, A1104, and A1106 Characteristic Package Thermal Resistance www.DataSheet4U.com Continuous-Time Switch Family Symbol Package LH, 1-layer PCB with copper limited to solder pads Package LH, 2-layer PCB with 0.463 in. R θJA side connected by thermal vias Package UA, 1-layer PCB with copper limited to solder pads ...

Page 6

... A1101, A1102, A1103, A1104, and A1106 Supply Current (On) versus Ambient Temperature (A1101/02/03/04/06) 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 – (°C) A Supply Current (Off) versus Ambient Temperature (A1101/02/03/04/06) 8.0 7.0 6.0 5.0 4.0 3.0 2.0 1.0 0 – (°C) A Output Voltage (On) versus Ambient Temperature (A1101/02/03/04/06) 400 350 300 250 200 150 100 50 0 – (° ...

Page 7

... A1101, A1102, A1103, A1104, and A1106 OPERATION The output of these devices switches low (turns on) when a magnetic field (south polarity) perpendicular to the Hall sen- sor exceeds the operate point threshold, B output is capable of sinking 25 mA and the output voltage When the magnetic field is reduced below the release ...

Page 8

... A1101, A1102, A1103, A1104, and A1106 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- ...

Page 9

... A1101, A1102, A1103, A1104, and A1106 Power Derating The device must be operated below the maximum junction temperature of the device Under certain combinations of J(max) peak conditions, reliable operation may require derating sup- plied power or improving the heat dissipation properties of the application. This section presents a procedure for correlating factors affecting operating T ...

Page 10

... A1101, A1102, A1103, A1104, and A1106 Preliminary dimensions, for reference only Dimensions in millimeters U.S. Customary dimensions (in.) in brackets, for reference only (reference JEDEC TO-236 AB, except case width and terminal tip-to-tip) Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown ...

Page 11

... A1101, A1102, A1103, A1104, and A1106 The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending. Allegro MicroSystems, Inc. reserves the right to make, from time to time, such de par tures from the detail spec tions as may be required to permit improvements in the per for mance, reliability, or manufacturability of its products ...

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