A1210, A1211, A1212, A1213, and A1214
Continuous-Time Latch Family
The Allegro
廬
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 nor-
mally caused by device overmolding, temperature excursions, and thermal stress.
3
Package LH, 3-pin Surface Mount
GND
3
1
2
1
VCC
2
VOUT
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 鹵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 pro-
vided 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 UA is a three-lead ultramini
SIP for through-hole mounting. Each package is lead (Pb) free, with 100% matte
tin plated leadframes.
Package UA, 3-pin SIP
Features and Benefits
1
VCC
2
GND
3
VOUT
Continuous-time operation
鈥?Fast power-on time
1 2
3
鈥?Low noise
Stable operation over full operating temperature range
Reverse battery protection
ABSOLUTE MAXIMUM RATINGS
Supply Voltage, V
CC
..........................................
30 V
Reverse-Supply Voltage, V
RCC
........................
鈥?0 V
Output Off Voltage, V
OUT
..................................
30 V
Reverse-Output Voltage, V
ROUT
.....................
鈥?.5 V
Output Current, I
OUTSINK
...............................
25 mA
Magnetic Flux Density, B .........................Unlimited
Operating Temperature
Ambient, T
A
, Range E..................
鈥?0潞C to 85潞C
Ambient, T
A
, Range L................
鈥?0潞C to 150潞C
Maximum Junction, T
J(max)
........................165潞C
Storage Temperature, T
S
..................
鈥?5潞C to 170潞C
Solid-state reliability
Factory-programmed at end-of-line for optimum performance
Robust EMC performance
High ESD rating
Regulator stability without a bypass capacitor
A1210-DS
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
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