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Allegro MicroSystems

A1205 Datasheet Preview

A1205 Datasheet

Continuous-Time Bipolar Switch

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A1205
2
- Continuous-Time Bipolar Switch
FEATURES AND BENEFITS
• AEC-Q100 automotive qualified
• Quality managed (QM), ISO 26262:2011 compliant
• Ideal for applications that require pulsing VCC to
conserve power
• Continuous-time operation
□Fast power-on time
□Low noise
• Stable operation over full operating temperature range
• Reverse battery protection
• Solid-state reliability
• Factory-programmed at end-of-line for optimum
performance
• Robust EMC performance
• High ESD rating
• Regulator stability without a bypass capacitor
PACKAGES:
Not to scale
NOT FOR
NEW DESIGN
3-pin SOT23W
(suffix LH)
3-pin SIP,
matrix HD style
(suffix UA)
VCC
3-pin SIP,
chopper style
(suffix UA)
DESCRIPTION
The AllegroA1205 Hall-effect bipolar switch is a next-
generation replacement and extension of the popular Allegro
A3134 bipolar switch. The A1205 has identical specifications
as the A1201 but is recommended for applications that require
pulsing VCC to conserve power. For standard applications,
where VCC is constant, please refer to the A1201 through
A1204 devices.
Overall, theA120x family, produced with BiCMOS technology,
consists of continuous-time 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.
TheA120x Hall-effect bipolar 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 motor commutation
applications, without adding external components.
Continued on the next page…
Regulator
To all subcircuits
Amp
VOUT
A12051-DS, Rev. 13
MCO-0000312
Gain
Offset
Trim
Control
Functional Block Diagram
GND
July 2, 2019




Allegro MicroSystems

A1205 Datasheet Preview

A1205 Datasheet

Continuous-Time Bipolar Switch

No Preview Available !

A1205
Continuous-Time Bipolar Switch
DESCRIPTION (continued)
The small geometries of the BiCMOS process allow these devices
to be provided in ultrasmall packages. The package styles available
provide magnetically optimized solutions for most applications.
Package LH is a SOT23W miniature thin-profile surface-mount
package, while package UA is a three-lead ultramini SIP for
through-hole mounting. Each package is lead (Pb) free, with 100%
matte-tin-plated leadframes.
SPECIFICATIONS
SELECTION GUIDE
Part Number
A1205LLHLT-T
Packing [1]
7-in. reel, 3000 pieces/reel
Mounting
3-pin SOT23W surface mount
Ambient, TA
A1205LLHLX-T 13-in. reel, 10000 pieces/reel
3-pin SOT23W surface mount –40°C to 150°C
A1205LUA-T [2]
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.
BRP (Min)
–50 G
BOP (Max)
50 G
RoHS
COMPLIANT
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Supply Voltage [3]
Reverse Supply Voltage [3]
Output Off Voltage [3]
Reverse Output Voltage [3]
VCC
VRCC
VOUT
VROUT
Output Current Sink
IOUTSINK
Magnetic Flux Density
B
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
TA
TJ(max)
Tstg
Range E
Range L
Notes
Rating
30
–30
30
–0.5
25
Unlimited
–40 to 85
–40 to 150
165
–65 to 170
Units
V
V
V
V
mA
G
°C
°C
°C
°C
[3] This rating does not apply to extremely short voltage transients such as Load Dump and/or ESD. Those events have individual ratings, specific to
the respective transient voltage event.
Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
2


Part Number A1205
Description Continuous-Time Bipolar Switch
Maker Allegro MicroSystems
Total Page 14 Pages
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