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A3189U 반도체 회로 부품 판매점

HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE OPERATION



Allegro MicroSystems 로고
Allegro MicroSystems
A3189U 데이터시트, 핀배열, 회로
3185 THRU
3189
HALL-EFFECT LATCHES
FOR HIGH-TEMPERATURE OPERATION
V
CC
12
3
Dwg. PH-003A
Pinning is shown viewed from branded side.
These Hall-effect latches are extremely temperature-stable and stress-
resistant sensors especially suited for operation over extended temperature
ranges to +150°C. Superior high-temperature performance is made possible
through a novel Schmitt trigger circuit that maintains operate and release
point symmetry by compensating for temperature changes in the Hall ele-
ment. Additionally, internal compensation provides magnetic switch points
that become more sensitive with temperature, hence offsetting the usual
degradation of the magnetic field with temperature. The symmetry capability
makes these devices ideal for use in pulse-counting applications where duty
cycle is an important parameter. The four basic devices (3185, 3187, 3188,
and 3189) are identical except for magnetic switch points.
Each device includes on a single silicon chip a voltage regulator, qua-
dratic Hall-voltage generator, temperature compensation circuit, signal
amplifier, Schmitt trigger, and a buffered open-collector output to sink up to
25 mA. The on-board regulator permits operation with supply voltages of 3.8
to 24 volts.
The first character of the part number suffix determines the device
operating temperature range. Suffix ‘E–’ is for -40°C to +85°C, and suffix
‘L–’ is for -40°C to +150°C. Three package styles provide a magnetically
optimized package for most applications. Suffix ‘–LT’ is a miniature SOT-
89/TO-243AA transistor package for surface-mount applications; suffix ‘–U’
is a three-lead plastic mini-SIP, while suffix ‘–UA’ is a three-lead ultra-mini-
SIP.
ABSOLUTE MAXIMUM RATINGS
at TA = +25°C
Supply Voltage, VCC ............................ 30 V
Reverse Battery Voltage, VRCC ........... -30 V
Magnetic Flux Density, B ........... Unlimited
Output OFF Voltage, VOUT .................. 30 V
Reverse Output Voltage, VOUT .......... -0.5 V
Continuous Output Current, IOUT ..... 25 mA
Operating Temperature Range, TA
Suffix ‘E–’ ................... -40°C to +85°C
Suffix ‘L–’ ................. -40°C to +150°C
Storage Temperature Range,
TS ............................... -65°C to +170°C
FEATURES
I Symmetrical Switch Points
I Superior Temperature Stability
I Operation From Unregulated Supply
I Open-Collector 25 mA Output
I Reverse Battery Protection
I Activate With Small, Commercially Available Permanent Magnets
I Solid-State Reliability
I Small Size
I Resistant to Physical Stress
Always order by complete part number: the prefix ‘A’ + the basic four-digit
part number + a suffix to indicate operating temperature range +
a suffix to indicate package style, e.g., A3185ELT .


A3189U 데이터시트, 핀배열, 회로
3185 THRU 3189
HALL-EFFECT LATCHES
FOR HIGH-TEMPERATURE
OPERATION
FUNCTIONAL BLOCK DIAGRAM
1 VCC
REG.
X 3 OUTPUT
2 GROUND
Dwg. FH-005-3
ELECTRICAL CHARACTERISTICS over operating temperature range, at VCC = 12 V.
Limits
Characteristic
Symbol
Test Conditions
Min. Typ. Max.
Supply Voltage
VCC Operating
3.8 —
24
Output Saturation Voltage
Output Leakage Current
Supply Current
Output Rise Time
Output Fall Time
VOUT(SAT)
IOFF
ICC
tr
tf
IOUT = 20 mA, B > BOP
VOUT = 24 V, B < BRP
B < BRP (Output OFF)
B > BOP (Output ON)
RL = 820 , CL = 20 pF
RL = 820 , CL = 20 pF
— 175 400
— 0.05 5.0
— 4.75 8.0
— 5.7 —
— 100 —
— 100 —
Units
V
mV
µA
mA
mA
ns
ns
MAGNETIC CHARACTERISTICS in gauss over operating supply voltage range.
A3185
Part Numbers*
A3187
A3188
Characteristic
BOP at TA = 25°C
over operating temp. range
BRP at TA = 25°C
over operating temp. range
Bhys at TA = 25°C
over operating temp. range
Min.
170
140
-270
-300
340
280
Max.
270
300
-170
-140
540
600
Min.
50
50
-150
-175
100
100
Max.
150
175
-50
-50
300
350
Min.
100
80
-180
-200
200
160
Max.
180
200
-100
-80
360
400
A3189
Min. Max.
50 230
50 250
-230 -50
-250 -50
100 460
100 500
NOTES: BOP = operate point (output turns ON); BRP = release point (output turns OFF); Bhys = hysteresis (BOP - BRP).
As used here, negative flux densities are defined as less than zero (algebraic convention).
*Complete part number includes a suffix to identify operating temperature range (E or L) and package type ( LT, U, or UA).
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright © 1995, 1999, Allegro MicroSystems, Inc.




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A3189U latch

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HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE OPERATION - Allegro MicroSystems



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HALL-EFFECT LATCHES FOR HIGH-TEMPERATURE OPERATION - Allegro MicroSystems