A1221LLHLX-T [ALLEGRO]
Chopper Stabilized Precision Hall Effect Latches; 斩波稳定精密霍尔效应锁存
| 型号： | A1221LLHLX-T |
| 厂家： | 
ALLEGRO MICROSYSTEMS |
| 描述： | Chopper Stabilized Precision Hall Effect Latches |
| 文件： | 总13页 (文件大小：281K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
A1220, A1221, and A1222
Chopper Stabilized Precision Hall Effect Latches
Features and Benefits
Description
▪ Symmetrical latch switchpoints
▪ Resistant to physical stress
▪ Superior temperature stability
▪ Output short-circuit protection
▪ Operation from unregulated supply down to 3 V
▪ Reverse battery protection
The A1220, A1221, and A1222 Hall-effect sensor ICs are
extremely temperature-stable and stress-resistant devices
especiallysuitedforoperationoverextendedtemperatureranges
to 150°C. Superior high-temperature performance is made
possiblethroughdynamicoffsetcancellation,whichreducesthe
residualoffsetvoltagenormallycausedbydeviceovermolding,
temperature dependencies, and thermal stress. Each device
includesonasinglesiliconchipavoltageregulator,Hall-voltage
generator,small-signalamplifier,chopperstabilization,Schmitt
trigger, and a short-circuit protected open-collector output to
sink up to 25 mA. A south pole of sufficient strength turns the
output on. A north pole of sufficient strength is necessary to
turn the output off.
▪ Solid-state reliability
▪ Small package sizes
Packages:
An onboard 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.
Two package styles provide magnetically optimized packages
for most applications. Package type LH is a modified 3-pin
SOT23WsurfacemountpackagewhileUAisathree-pinultra-
mini SIP for through hole mounting. Both packages are lead
(Pb) free, with 100% matte tin plated leadframes.
3-pin SOT23W (suffix LH)
3-pin SIP (suffix UA)
Not to scale
Functional Block Diagram
VCC
Regulator
To All Subcircuits
VOUT
Low-Pass
Filter
Amp
Control
Current Limit
GND
A1220-DS, Rev. 8
A1220, A1221
and A1222
Chopper Stabilized Precision Hall Effect Latches
Selection Guide
Part Number
Packing1
Mounting
Ambient, TA
BRP (Min)
BOP (Max)
A1220ELHLX-T
A1220ELHLT-T2
A1220EUA-T
13-in. reel, 10000 pieces/reel
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
3-pin SOT23W surface mount
3-pin SOT23W surface mount
3-pin SIP through hole
–40ºC to 85ºC
–40
40
A1220LLHLX-T
A1220LLHLT-T2
A1220LUA-T
13-in. reel, 10000 pieces/reel
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
3-pin SOT23W surface mount
3-pin SOT23W surface mount
3-pin SIP through hole
–40ºC to 150ºC
–40ºC to 85ºC
A1221ELHLX-T
A1221ELHLT-T2
A1221EUA-T
13-in. reel, 10000 pieces/reel
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
3-pin SOT23W surface mount
3-pin SOT23W surface mount
3-pin SIP through hole
–90
90
A1221LLHLX-T
A1221LLHLT-T2
A1221LUA-T
13-in. reel, 10000 pieces/reel
7-in. reel, 3000 pieces/reel
Bulk, 500 pieces/bag
3-pin SOT23W surface mount
3-pin SOT23W surface mount
3-pin SIP through hole
–40ºC to 150ºC
–40ºC to 85ºC
–40ºC to 150ºC
A1222ELHLT-T
7-in. reel, 3000 pieces/reel
3-pin SOT23W surface mount
3-pin SOT23W surface mount
3-pin SOT23W surface mount
3-pin SOT23W surface mount
3-pin SIP through hole
A1222ELHLX-T2 13-in. reel, 10000 pieces/reel
A1222LLHLT-T
A1222LLHLX-T2
A1222LUA-T
7-in. reel, 3000 pieces/reel
13-in. reel, 10000 pieces/reel
Bulk, 500 pieces/bag
–150
150
1Contact Allegro for additional packing options.
2Available through authorized Allegro distributors only.
Absolute Maximum Ratings
Characteristic
Forward Supply Voltage
Reverse Supply Voltage
Output Off Voltage
Symbol
VCC
Notes
Rating
Units
V
26.5
–30
VRCC
VOUT
IOUT
V
26
V
Continuous Output Current
Reverse Output Current
25
mA
mA
ºC
ºC
ºC
ºC
IROUT
–50
Range E
Range L
–40 to 85
–40 to 150
165
Operating Ambient Temperature
TA
Maximum Junction Temperature
Storage Temperature
TJ(max)
Tstg
–65 to 170
Pin-out Diagrams
3
Package LH
Package UA
2
1
3
1
2
Terminal List
Number
Package LH Package UA
Name
Description
VCC
VOUT
GND
Connects power supply to chip
Output from circuit
Ground
1
2
3
1
3
2
Allegro MicroSystems, Inc.
115 Northeast Cutoff
2
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
A1220, A1221
and A1222
Chopper Stabilized Precision Hall Effect Latches
ELECTRICAL CHARACTERISTICS Valid valid over full operating voltage and ambient temperature ranges; unless otherwise noted
Characteristics
Electrical Characteristics
Forward Supply Voltage
Output Leakage Current
Output Saturation Voltage
Output Current Limit
Symbol
Test Conditions
Min.
Typ.1
Max.
Unit2
VCC
Operating, TJ < 165°C
VOUT = 24 V, B < BRP
3
–
–
–
24
10
V
IOUTOFF
μA
mV
mA
VOUT(SAT) IOUT = 20 mA, B > BOP
–
185
–
500
60
IOM
tPO
B > BOP
30
VCC > 3.0 V, B < BRP(min) – 10 G,
B > BOP(max) + 10 G
3
–
–
25
μs
Power-On Time
Chopping Frequency
fC
tr
–
–
800
0.2
0.1
–
–
2
kHz
μs
3,4
RL = 820 Ω, CL = 20 pF
RL = 820 Ω, CL = 20 pF
B > BOP, VCC = 12 V
B < BRP, VCC = 12 V
VRCC = –30 V
Output Rise Time
3,4
tf
–
2
μs
Output Fall Time
ICC(ON)
ICC(OFF)
IRCC
VZ
–
4
mA
mA
mA
V
Supply Current
–
–
4
Reverse Supply Current
Supply Zener Clamp Voltage
Zener Impedance
–
–
–5
–
ICC = 5 mA; TA = 25°C
ICC = 5 mA; TA = 25°C
28
–
–
IZ
50
–
Ω
Magnetic Characteristics
A1220
A1221
A1222
A1220
A1221
A1222
A1220
5
15
22
50
40
90
G
G
G
G
G
G
G
G
G
Operate Point
Release Point
Hysteresis
BOP
70
110
–23
–50
–110
45
150
–5
–40
–90
–150
10
BRP
–15
–70
80
(BOP – BRP
)
BHYS
A1221
A1222
30
100
220
180
300
140
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.
4CL = oscilloscope probe capacitance.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
3
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
A1220, A1221
and A1222
Chopper Stabilized Precision Hall Effect Latches
THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
Characteristic
Symbol
Test Conditions
Value Units
Package LH, 1-layer PCB with copper limited to solder pads
228 ºC/W
2
Package LH, 2-layer PCB with 0.463 in. of copper area each
side connected by thermal vias
RθJA
Package Thermal Resistance
110
ºC/W
Package UA, 1-layer PCB with copper limited to solder pads
165 ºC/W
Power Derating Curve
TJ(max) = 165ºC; ICC = ICC(max)
25
24
23
V
CC(max)
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
Package LH, 2-layer PCB
(RQJA = 110 ºC/W)
Package UA, 1-layer PCB
(RQJA = 165 ºC/W)
Package LH, 1-layer PCB
(RQJA = 228 ºC/W)
4
3
2
V
CC(min)
20
40
60
80
100
120
140
160
180
Power Dissipation versus Ambient Temperature
1900
1800
1700
1600
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
20
40
60
80
100
120
140
160
180
Temperature (°C)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
4
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
A1220, A1221
and A1222
Chopper Stabilized Precision Hall Effect Latches
Characteristic Performance
A1220, A1221, and A1222 Electrical Characteristics
Average Supply Current (On) versus Temperature
Average Supply Current (On) versus Supply Voltage
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3.0V
3.8V
4.2V
12V
24V
150°C
25°C
-40°C
2
6
10
14
18
22
26
-60 -40 -20
0
20 40 60 80 100 120 140 160
A (°C)
VCC (V)
T
Average Supply Current (Off) versus Temperature
Average Supply Current (Off) versus Supply Voltage
6.0
6.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
5.5
5.0
4.5
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
3.0V
3.8V
4.2V
12V
24V
150°C
25°C
-40°C
2
6
10
14
18
22
26
-60 -40 -20
0
20 40 60 80 100 120 140 160
TA (°C)
V
CC (V)
Saturation Voltage versus Temperature
Saturation Voltage versus Supply Voltage
300
250
200
150
100
50
300
250
200
150
100
50
2.6V
3.0V
3.8V
4.2V
12V
150°C
25°C
-40°C
24V
0
0
-60 -40 -20
0
20 40 60 80 100 120 140 160
TA (°C)
0
2
4
6
8
10 12 14 16 18 20 22 24 26
V
CC (V)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
5
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
A1220, A1221
and A1222
Chopper Stabilized Precision Hall Effect Latches
A1220 Magnetic Characteristics
Operate Point versus Temperature
Operate Point versus Supply Voltage
40
35
30
25
20
15
10
5
40
35
30
25
20
15
10
5
(V)
3.0
3.8
4.2
12
24
(°C)
-40
25
150
0
0
2
6
10
14
18
22
26
-60 -40 -20
0
20 40 60 80 100 120 140 160
A (°C)
V
CC (V)
T
Release Point versus Supply Voltage
Release Point versus Temperature
0
0
-5
-5
-10
-15
-20
-25
-30
-35
-40
-10
-15
-20
-25
-30
-35
-40
(V)
(°C)
-40
25
3.0
3.8
4.2
12
24
150
-60 -40 -20
0
20 40 60 80 100 120 140 160
A (°C)
2
6
10
14
18
22
26
T
V
CC (V)
Switchpoint Hysteresis versus Temperature
Switchpoint Hysteresis versus Supply Voltage
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
80
75
70
65
60
55
50
45
40
35
30
25
20
15
10
5
(V)
3.0
3.8
4.2
12
24
(°C)
-40
25
150
0
0
2
6
10
14
18
22
26
-60 -40 -20
0
20 40 60 80 100 120 140 160
TA (°C)
VCC (V)
Allegro MicroSystems, Inc.
115 Northeast Cutoff
6
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
A1220, A1221
and A1222
Chopper Stabilized Precision Hall Effect Latches
A1221 Magnetic Characteristics
Operate Point versus Temperature
Operate Point versus Supply Voltage
90
80
70
60
50
40
30
20
10
0
90
80
70
60
50
40
30
20
10
0
(°C)
-40
25
(V)
2.6
12
24
150
2
6
10
14
18
22
26
-60 -40 -20
0
20 40 60 80 100 120 140 160
A (°C)
VCC (V)
T
Release Point versus Supply Voltage
Release Point versus Temperature
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
(V)
2.6
12
24
(°C)
-40
25
150
-60 -40 -20
0
20 40 60 80 100 120 140 160
TA (°C)
2
6
10
14
18
22
26
VCC (V)
Switchpoint Hysteresis versus Temperature
Switchpoint Hysteresis versus Supply Voltage
180
170
160
150
140
130
120
110
100
90
180
170
160
150
140
130
120
110
100
90
(°C)
-40
25
(V)
2.6
12
24
150
80
80
70
70
60
60
50
50
40
40
30
30
2
6
10
14
18
22
26
-60 -40 -20
0
20 40 60 80 100 120 140 160
A (°C)
VCC (V)
T
Allegro MicroSystems, Inc.
115 Northeast Cutoff
7
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
A1220, A1221
and A1222
Chopper Stabilized Precision Hall Effect Latches
A1222 Magnetic Characteristics
Operate Point versus Temperature
Operate Point versus Supply Voltage
150
140
130
120
110
100
90
180
170
160
150
140
130
120
110
100
90
(°C)
-40
25
(V)
2.6
24
150
80
80
70
70
2
6
10
14
18
22
26
-60 -40 -20
0
20 40 60 80 100 120 140 160
A (°C)
V
CC (V)
T
Release Point versus Supply Voltage
Release Point versus Temperature
-70
-80
-70
-80
-90
-90
-100
-110
-120
-130
-140
-150
-160
-170
-180
-100
-110
-120
-130
-140
-150
(°C)
-40
25
(V)
2.6
24
150
-60 -40 -20
0
20 40 60 80 100 120 140 160
TA (°C)
2
6
10
14
18
22
26
VCC (V)
Switchpoint Hysteresis versus Temperature
Switchpoint Hysteresis versus Supply Voltage
300
280
260
240
220
200
180
160
140
300
280
260
240
220
200
180
160
140
(°C)
-40
25
(V)
2.6
24
150
2
6
10
14
18
22
26
-60 -40 -20
0
20 40 60 80 100 120 140 160
A (°C)
VCC (V)
T
Allegro MicroSystems, Inc.
115 Northeast Cutoff
8
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
A1220, A1221
and A1222
Chopper Stabilized Precision Hall Effect Latches
Functional Description
Operation
Applications
The output of these devices switches low (turns on) when a mag-
netic field perpendicular to the Hall element exceeds the operate
point threshold, BOP (see panel A of figure 1). After turn-on, the
output voltage is VOUT(SAT). The output transistor is capable of
sinking current up to the short circuit current limit, IOM, which is
a minimum of 30 mA. When the magnetic field is reduced below
the release point, BRP, the device output goes high (turns off).
The difference in the magnetic operate and release points is the
hysteresis, BHYS, of the device. This built-in hysteresis allows
clean switching of the output even in the presence of external
mechanical vibration and electrical noise.
It is strongly recommended that an external bypass capacitor be
connected (in close proximity to the Hall element) between the
supply and ground of the device to reduce both external noise
and noise generated by the chopper stabilization technique. As is
shown in panel B of figure 1, a 0.1 μF capacitor is typical.
Extensive applications information for Hall effect devices is
available in:
• Hall-Effect IC Applications Guide, Application Note 27701
• Guidelines for Designing Subassemblies Using Hall-Effect
Devices, Application Note 27703.1
Removal of the magnetic field will leave the device output
latched on if the last crossed switchpoint is BOP, or latched off if
the last crossed switch point is BRP.
• Soldering Methods for Allegro’s Products – SMT and Through-
Hole, Application Note 26009
Powering-on the device in the hysteresis range (less than BOP and
higher than BRP) will give an indeterminate output state. The cor-
All are provided in Allegro Electronic Data Book, AMS-702, and
rect state is attained after the first excursion beyond BOP or BRP
.
the Allegro Web site, www.allegromicro.com.
VS
V+
VCC
VCC
RL
A122x
CBYP
VOUT
0.1 μF
Output
GND
VOUT(SAT)
B+
0
B–
0
BHYS
(A)
(B)
Figure 1. Switching behavior of latches. In panel A, on the horizontal axis, the B+ direction indicates increasing south polarity magnetic field strength,
and the B– direction indicates decreasing south polarity field strength (including the case of increasing north polarity). This behavior can be exhibited
when using a circuit such as that shown in panel B.
Allegro MicroSystems, Inc.
115 Northeast Cutoff
9
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
A1220, A1221
and A1222
Chopper Stabilized Precision Hall Effect Latches
The chopper stabilization technique uses a 400 kHz high fre-
quency clock. For demodulation process, a sample and hold
technique is used, where the sampling is performed at twice the
chopper frequency (800 kHz). This high-frequency operation
allows a greater sampling rate, which results in higher accuracy
and faster signal-processing capability. This approach desensi-
tizes the chip to the effects of thermal and mechanical stresses,
and produces devices that have extremely stable quiescent Hall
output voltages and precise recoverability after temperature
cycling. This technique is made possible through the use of a
BiCMOS process, which allows the use of low-offset, low-noise
amplifiers in combination with high-density logic integration and
sample-and-hold circuits.
Chopper Stabilization Technique
When using Hall effect technology, a limiting factor for
switchpoint accuracy is the small signal voltage developed across
the Hall element. This voltage is disproportionally small relative
to the offset that can be produced at the output of the Hall ele-
ment. This makes it difficult to process the signal while main-
taining an accurate, reliable output over the specified operating
temperature and voltage ranges.
Chopper stabilization is a unique approach used to minimize
Hall offset on the chip. The patented Allegro technique, namely
Dynamic Quadrature Offset Cancellation, removes key sources
of the output drift induced by thermal and mechanical stresses.
This offset reduction technique is based on a signal modulation-
demodulation process. The undesired offset signal is separated
from the magnetic field-induced signal in the frequency domain,
through modulation. The subsequent demodulation acts as a
modulation process for the offset, causing the magnetic field
induced signal to recover its original spectrum at baseband, while
the dc offset becomes a high-frequency signal. The magnetic
sourced signal then can pass through a low-pass filter, while the
modulated DC offset is suppressed. This configuration is illus-
trated in figure 2.
The repeatability of magnetic field-induced switching is affected
slightly by a chopper technique. However, the Allegro high
frequency chopping approach minimizes the affect of jitter and
makes it imperceptible in most applications. Applications that are
more likely to be sensitive to such degradation are those requiring
precise sensing of alternating magnetic fields; for example, speed
sensing of ring-magnet targets. For such applications, Allegro
recommends its digital device families with lower sensitivity
to jitter. For more information on those devices, contact your
Allegro sales representative.
Regulator
Clock/Logic
Low-Pass
Filter
Hall Element
Amp
Figure 2. Model of chopper stabilization technique
Allegro MicroSystems, Inc.
115 Northeast Cutoff
10
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
A1220, A1221
and A1222
Chopper Stabilized Precision Hall Effect Latches
A worst-case estimate, PD(max), represents the maximum allow-
Power Derating
able power level (VCC(max), ICC(max)), without exceeding TJ(max)
at a selected RJA and TA.
,
The device must be operated below the maximum junction
temperature of the device, TJ(max). Under certain combinations of
peak conditions, reliable operation may require derating supplied
power or improving the heat dissipation properties of the appli-
cation. This section presents a procedure for correlating factors
affecting operating TJ. (Thermal data is also available on the
Allegro MicroSystems website.)
Example: Reliability for VCC at TA=150°C, package LH, using a
minimum-K PCB.
Observe the worst-case ratings for the device, specifically:
RJA=228°C/W, TJ(max) =165°C, VCC(max) = 24 V, and
ICC(max) = 4 mA.
The Package Thermal Resistance, RJA, is a figure of merit sum-
marizing the ability of the application and the device to dissipate
heat from the junction (die), through all paths to the ambient air.
Its primary component is the Effective Thermal Conductivity, K,
of the printed circuit board, including adjacent devices and traces.
Radiation from the die through the device case, RJC, is relatively
small component of RJA. Ambient air temperature, TA, and air
motion are significant external factors, damped by overmolding.
Calculate the maximum allowable power level, PD(max). First,
invert equation 3:
Tmax = TJ(max) – TA = 165°C–150°C = 15°C
This provides the allowable increase to TJ resulting from internal
power dissipation. Then, invert equation 2:
PD(max) = Tmax ÷RJA =15°C÷228 °C/W=66mW
The effect of varying power levels (Power Dissipation, PD), can
be estimated. The following formulas represent the fundamental
relationships used to estimate TJ, at PD.
Finally, invert equation 1 with respect to voltage:
VCC(est) = PD(max) ÷ ICC(max)= 66mW÷4mA=16.4 V
PD = VIN
I
(1)
(2)
(3)
×
IN
The result indicates that, at TA, the application and device can
dissipate adequate amounts of heat at voltages ≤VCC(est)
.
T = PD
R
JA
×
Compare VCC(est) to VCC(max). If VCC(est) ≤ VCC(max), then reli-
able operation between VCC(est) and VCC(max) requires enhanced
RJA. If VCC(est) ≥ VCC(max), then operation between VCC(est)
and VCC(max) is reliable under these conditions.
TJ = TA + ΔT
For example, given common conditions such as: TA= 25°C,
VCC = 12 V, ICC = 1.6 mA, and RJA = 165 °C/W, then:
PD = VCC
I
= 12 V 1.6 mA = 19 mW
×
×
CC
T = PD
R
= 19 mW 165 °C/W = 3°C
×
×
JA
TJ = TA + T = 25°C + 3°C = 28°C
Allegro MicroSystems, Inc.
115 Northeast Cutoff
11
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
A1220, A1221
and A1222
Chopper Stabilized Precision Hall Effect Latches
Package LH, 3-Pin (SOT-23W)
+0.12
–0.08
2.98
3
D
1.49
+4°
–0°
4°
A
+0.020
–0.053
0.180
D
0.96
D
+0.10
2.90
+0.19
–0.06
2.40
1.91
–0.20
0.70
0.25 MIN
1.00
2
1
0.55 REF
0.25 BSC
0.95
PCB Layout Reference View
Seating Plane
Gauge Plane
B
Branded Face
8X 10° REF
1.00 ±0.13
+0.10
NNT
1
0.05
–0.05
C
Standard Branding Reference View
0.95 BSC
0.40 ±0.10
N = Last two digits of device part number
T = Temperature code
For Reference Only; not for tooling use (reference dwg. 802840)
Dimensions in millimeters
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
Active Area Depth, 0.28 mm REF
A
B
Reference land pattern layout
All pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary
to meet application process requirements and PCB layout tolerances
C
D
Branding scale and appearance at supplier discretion
Hall element, not to scale
Allegro MicroSystems, Inc.
115 Northeast Cutoff
12
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
A1220, A1221
and A1222
Chopper Stabilized Precision Hall Effect Latches
Package UA, 3-Pin SIP
+0.08
4.09
–0.05
45°
B
C
E
2.04
1.52 ±0.05
1.44
E
E
Mold Ejector
Pin Indent
+0.08
–0.05
NNT
3.02
45°
Branded
Face
1
2.16
Standard Branding Reference View
D
MAX
= Supplier emblem
N = Last two digits of device part number
T = Temperature code
0.79 REF
A
0.51
REF
1
2
3
For Reference Only; not for tooling use (reference DWG-9049)
Dimensions in millimeters
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
+0.03
–0.06
0.41
15.75 ±0.51
Dambar removal protrusion (6X)
A
B
C
D
Gate burr area
Active Area Depth, 0.50 mm REF
Branding scale and appearance at supplier discretion
E
Hall element, not to scale
+0.05
–0.07
1.27 NOM
0.43
Copyright ©2009, Allegro MicroSystems, Inc.
The products described herein are manufactured under one or more of the following U.S. patents: 5,517,112; 5,619,137; 5,621,319; 7,425,821 and/
or other patents pending.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to per-
mit improvements in the performance, reliability, or manufacturability of its products. Before placing an order, the user is cautioned to verify that the
information being relied upon is current.
Allegro’s products are not to be used in life support devices or systems, if a failure of an Allegro product can reasonably be expected to cause the
failure of that life support device or system, or to affect the safety or effectiveness of that device or system.
The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use;
nor for any infringement of patents or other rights of third parties which may result from its use.
For the latest version of this document, visit our website:
www.allegromicro.com
Allegro MicroSystems, Inc.
115 Northeast Cutoff
13
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
相关型号：
A1223ELHLX-T
Hall Effect Sensor, -18mT Min, 18mT Max, 30-60mA, Rectangular, Surface Mount, SOT-23W, 3 PIN
ALLEGRO
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