A1202 and A1203
Continuous-Time Bipolar Switch Family
FEATURES AND BENEFITS DESCRIPTION
AEC-Q100 automotive qualified The Allegro A1202 and A1203 Hall-effect bipolar switches
Continuous-time operation are next-generation replacements and extension of the popular
Fast power-on time Allegro A3133 and A3132 bipolar switch product line. Overall,
Low noise the A120x family, produced with BiCMOS technology, consists
Stable operation over full operating temperature range of continuous-time devices that feature fast power-on time
Reverse-battery protection and low-noise operation. Device programming is performed
Solid-state reliability after packaging, to ensure increased switchpoint accuracy
Factory-programmed at end-of-line for optimum by eliminating offsets that can be induced by package stress.
performance Unique Hall element geometries and low-offset amplifiers
Robust EMC performance help to minimize noise and to reduce the residual offset
High ESD rating voltage normally caused by device overmolding, temperature
Regulator stability without a bypass capacitor excursions, and thermal stress.
The A120x Hall-effect bipolar switches include the following on
a single silicon chip: voltage regulator, Hall-voltage generator,
PACKAGES:
small-signal amplifier, Schmitt trigger, and NMOS output
Not to scale
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 motor commutation
applications, without adding external components. All devices
NOT FOR
NEW DESIGN
in the family are identical, except for magnetic switchpoints.
The small geometries of the BiCMOS process allow these
devices to be provided in ultrasmall packages. The package
3-pin SOT23W
styles available provide magnetically optimized solutions for
(suffix LH)
most applications. Package LH is a SOT23W, a miniature low-
3-pin SIP, 3-pin SIP,
profile surface-mount package, while package UA is a three-lead
matrix HD style chopper style
(suffix UA) (suffix UA) ultramini SIP for through-hole mounting. Each package is lead
(Pb) free, with 100% matte-tin-plated leadframes.
VCC
Regulator To all subcircuits
VOUT
Amp
Gain Offset
Trim
Control
GND
Functional Block Diagram
A1202-DS, Rev. 22
June 19, 2018
MCO-0000372A1202
Continuous-Time Bipolar Switch Family
and A1203
SELECTION GUIDE
[1]
Part Number Packing Mounting Ambient, T B (Min) B (Max)
A RP OP
[2]
A1202LUA-T Bulk, 500 pieces/bag 3-pin SIP through hole 40C to 150C 75 75
[2]
A1203EUA-T Bulk, 500 pieces/bag 3-pin SIP through hole 40C to 85C
A1203LLHLT-T 7-in. reel, 3000 pieces/reel 3-pin SOT23W surface mount
95 95
A1203LLHLX-T 13-in. reel, 10000 pieces/reel 3-pin SOT23W surface mount 40C to 150C
[2]
A1203LUA-T Bulk, 500 pieces/bag 3-pin SIP through hole
[1]
Contact Allegro for additional packing options.
[2]
The chopper-style UA package is not for new design; the matrix HD style UA package is recommended for new designs.
ABSOLUTE MAXIMUM RATINGS
Characteristic Symbol Notes Rating Units
Supply Voltage V 30 V
CC
Reverse Supply Voltage V 30 V
RCC
Output Off Voltage V 30 V
OUT
Reverse Output Voltage V 0.5 V
ROUT
Output Current Sink I 25 mA
OUTSINK
Magnetic Flux Density B Unlimited G
Range E 40 to 85 C
Operating Ambient Temperature T
A
Range L 40 to 150 C
Maximum Junction Temperature T (max) 165 C
J
Storage Temperature T 65 to 170 C
stg
3
2
1 2 1 3
Package LH Package UA
Terminal List
Number
Name Description
Package LH Package UA
1 1 VCC Connects power supply to chip
2 3 VOUT Output from circuit
3 2 GND Ground
2
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
VCC
GND
VOUT
VCC
GND
VOUT