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A1122 PDF 데이터시트 : 부품 기능 및 핀배열

부품번호 A1122
기능 (A1120 - A1125) Chopper Stabilized Precision Hall Effect Switches
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A1122 데이터시트, 핀배열, 회로
A1120, A1121, A1122, and A1125
Chopper Stabilized Precision Hall Effect Switches
Features and Benefits
Unipolar switchpoints
Resistant to physical stress
Superior temperature stability
Output short-circuit protection
Operation from unregulated supply
Reverse battery protection
Solid-state reliability
Small package sizes
Packages:
3-pin SOT23W (suffix LH)
Not to scale
3-pin SIP (suffix UA)
Description
The A1120, A1121, A1122, and A1125 Hall-effect, unipolar
switches are extremely temperature-stable and stress-resistant
sensor ICs, especially suited for operation over extended
temperature ranges to 150°C. Superior high-temperature
performance is made possible through dynamic offset
cancellation, which reduces the residual offset voltage normally
caused by device overmolding, temperature dependencies, and
thermal stress.
Each device includes on a single silicon chip a voltage regulator,
Hall-voltage generator, small-signal amplifier, chopper
stabilization, Schmitt trigger, and a short-circuit protected
open-drain output to sink up to 25 mA.
An on-board regulator permits operation with supply voltages
of 3 to 24 V. The advantage of operating down to 3 V is that
the device can be used in 3 V applications or with additional
external resistance in series with the supply pin for greater
protection against high voltage transient events.
For the A1120, A1121, and A1122, a south pole of sufficient
strength turns the output on. Removal of the magnetic field
turns the output off. The A1125 is complementary, in that for
thesehttp://www.DataSheet4U.net/ devices, a south pole turns the A1125 output off, and
removal of the magnetic field turns the output on.
Two package styles provide a magnetically optimized package
for most applications. Package type LH is a modified SOT23W,
surface mount package, while UAis a three-lead ultra-mini SIP
for through-hole mounting. Each package type is lead (Pb) free
(suffix, –T), with a 100% matte tin plated leadframe.
Functional Block Diagram
VCC
Amp
Regulator
Low-Pass
Filter
To All Subcircuits
Control
Current Limit
VOUT
A1120-DS, Rev. 12
GND
datasheet pdf - http://www.DataSheet4U.net/




A1122 pdf, 반도체, 판매, 대치품
A1120, A1121, A1122
and A1125
Chopper Stabilized Precision Hall Effect Switches
ELECTRICAL CHARACTERISTICS Valid valid over full operating voltage and ambient temperature ranges; unless otherwise noted
Characteristics
Symbol
Test Conditions
Min. Typ.1 Max. Unit2
Electrical Characteristics
Forward Supply Voltage
Output Leakage Current
VCC
IOUTOFF
Operating, TJ < 165°C
A1120,
A1121,
A1122
VOUT = 24 V, B < BRP
3 – 24 V
– – 10 μA
Output Saturation Voltage
VOUT(SAT)
A1125
A1120,
A1121,
A1122
VOUT = 24 V, B > BOP
IOUT = 20 mA, B > BOP
– – 10 μA
– 185 500 mV
Output Current Limit
A1125 IOUT = 20 mA, B < BRP
A1120,
IOM
A1121,
A1122
B > BOP
– 185 500 mV
30 – 60 mA
Power-On Time3
Chopping Frequency
Output Rise Time3,4
Output Fall Time3,4
Supply Current
tPO
fC
tr
tf
ICC(ON)
ICC(OFF)
A1125 B < BRP
VCC > 3.0 V, B < BRP(min) – 10 G,
B > BOP(max) + 10 G
RL = 820 Ω, CS = 20 pF
RL = 820 Ω, CS = 20 pF
A1120,
A1121,
A1122
A1125
VCC = 12 V, B > BOP
http://www.DataSheet4U.net/
VCC = 12 V, B < BRP
A1120,
A1121,
A1122
VCC = 12 V, B < BRP
30 – 60
– – 25
– 800 –
– 0.2 2
– 0.1 2
––4
––4
––4
mA
μs
kHz
μs
μs
mA
mA
mA
Reverse Supply Current
Supply Zener Clamp Voltage
Zener Impedance
Magnetic Characteristics
IRCC
VZ
IZ
A1125 VCC = 12 V, B > BOP
VRCC = –30 V
ICC = 5 mA; TA = 25°C
ICC = 5 mA; TA = 25°C
A1120
––4
– – –5
28 –
– 50 –
– 35 50
mA
mA
V
Ω
G
Operate Point
A1121
BOP A1122
50 95 135
120 150 200
G
G
A1125
– 35 50
G
A1120
5 25 –
G
Release Point
A1121
BRP A1122
40 70 110
110 125 190
G
G
A1125
5 25 –
G
Hysteresis
BHYS
A1120,
A1125
A1121,
A1122
(BOP – BRP)
– 10 –
10 25 42
G
G
1Typical data are are at TA = 25°C and VCC = 12 V, and are for initial design estimations only.
21 G (gauss) = 0.1 mT (millitesla).
3Guaranteed by device design and characterization.
4CS = oscilloscope probe capacitance.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
4
datasheet pdf - http://www.DataSheet4U.net/

4페이지










A1122 전자부품, 판매, 대치품
A1120, A1121, A1122
and A1125
Chopper Stabilized Precision Hall Effect Switches
A1120 and A1125 Magnetic Characteristics
Average Operate Point versus Ambient Temperature
50
45
40
35 VCC (V)
30 3.0
25
20 24
15
10
5
0
-60 -40 -20 0 20 40 60 80 100 120 140 160
TA (°C)
Average Operate Point versus Average Supply Voltage
50
45
40
35
30
25
20
15
10
5
0
2
TA (°C)
–40
25
150
6 10 14 18 22 26
VCC (V)
Average Release Point versus Ambient Temperature
50
45
40
35
30 VCC (V)
25 3.0
20
15 24
10
5
0
-60 -40 -20 0 20 40 60 80 100 120 140 160
TA (°C)
http://www.DataSheet4U.net/
Average Release Point versus Average Supply Voltage
50
45
40
35
30
25
20
15
10
5
0
2
6 10 14 18 22 26
VCC (V)
TA (°C)
–40
25
150
Average Switchpoint Hysteresis versus Ambient Temperature
20
18
16
14
12 VCC (V)
10 3.0
8 24
6
4
2
0
-60 -40 -20 0 20 40 60 80 100 120 140 160
TA (°C)
Average Switchpoint Hysteresis versus Supply Voltage
20
18
16
14
12
10
8
6
4
2
0
2
TA (°C)
–40
25
150
6 10 14 18 22 26
VCC (V)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
7
datasheet pdf - http://www.DataSheet4U.net/

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Chopper Stabilized Precision Hall Effect Switches

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(A1120 - A1125) Chopper Stabilized Precision Hall Effect Switches

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