A1210_16 Datasheet, PDF (1/14 Pages) Allegro MicroSystems – Continuous-Time Latch Family

A1210, A1211, A1212, A1213, and A1214
Continuous-Time Latch Family
FEATURES AND BENEFITS
• AEC-Q100 automotive qualified
• 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:
3-Pin SOT23W (suffix LH)
3-Pin SIP (suffix UA)
1
2
Not to scale
3
1
2
3
VCC
DESCRIPTION
The Allegro^™ A1210-A1214 Hall-effect latches are next
generation replacements for the popular Allegro 317x and
318x lines of latching switches. The A121x 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 A1210-A1214 Hall-effect latches 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 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 provide magnetically optimized solutions for
most applications. Package LH is an SOT23W, a miniature low-
profile surface-mount package, while package UAis a three-lead
ultramini SIP for through-hole mounting. Each package is lead
(Pb) free, with 100% matte-tin-plated leadframes.
Regulator
To all subcircuits
Amp
VOUT
A1210-DS, Rev. 13
Gain
Offset
Trim
Control
GND
Functional Block Diagram