ALLEGRO A1230

A1230
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
Features and Benefits
Description
▪ Two matched Hall effect switches on a single substrate
▪ 1 mm Hall element spacing
▪ Superior temperature stability and industry-leading
jitter performance through use of advanced chopperstabilization topology
▪ Integrated LDO regulator provides 3.3 V operation
▪ Integrated ESD protection from outputs and VCC to
ground
▪ High sensitivity switchpoints
▪ Robust structure for EMC protection
▪ Solid-state reliability
▪ Reverse battery protection on supply and both output pins
The A1230 is a dual-channel, bipolar switch with two Halleffect sensing elements, each providing a separate digital
output for speed and direction signal processing capability. The
Hall elements are photolithographically aligned to better than
1 μm. Maintaining accurate mechanical location between the
two active Hall elements eliminates the major manufacturing
hurdle encountered in fine-pitch detection applications. The
A1230 is a highly sensitive, temperature stable magnetic
sensing device ideal for use in ring magnet based, speed and
direction systems located in harsh automotive and industrial
environments.
Packages: 8-pin SOIC (suffix L), and
4-pin SIP (suffix K)
The A1230 monolithic integrated circuit (IC) contains two
independent Hall-effect bipolar switches located 1 mm apart.
The digital outputs are out of phase so that the outputs are in
quadrature when interfaced with the proper ring magnet design.
This allows easy processing of speed and direction signals.
Extremely low-drift amplifiers guarantee symmetry between
the switches to maintain signal quadrature. The Allegro®
patented, high-frequency chopper-stabilization technique
cancels offsets in each channel providing stable operation over
the full specified temperature and voltage ranges.
Additionally, the high-frequency chopping circuits allow an
increased analog signal-to-noise ratio at the input of the digital
Continued on the next page…
Not to scale
Typical Application
VOUTPUTB
VOUTPUTA
2
OUTPUTA
VSupply
1
A1230
VCC
OUTPUTB
100 7
A
GND
0.1 μF
A Resistor is optional,
depending on Conducted
Immunity requirements
Using regulated supply
A1230DS
4
3
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
Description (continued)
comparators internal to the IC. As a result, the A1230 achieves
industry-leading digital output jitter performance that is critical
in high performance motor commutation applications. An on-chip
low dropout (LDO) regulator allows the use of this device over a
wide operating voltage range. Post-assembly factory programming
at Allegro provides sensitive switchpoints that are symmetrical
between the two switches.
The A1230 is available in a plastic 8-pin SOIC surface mount
package (L) and a plastic 4-pin SIP (K). Both are available in a
temperature range of –40°C to 150°C. Each package is lead (Pb)
free, with 100% matte tin plated leadframe.
Selection Guide
Part Number
Packing*
Mounting
A1230LK-T
Bulk, 98 pieces/bag
4-pin SIP through hole
A1230LLTR-T
13-in. reel, 3000 pieces/reel
8-pin SOIC surface mount
Ambient, TA
–40ºC to 150ºC
*Contact Allegro for additional packing options.
Absolute Maximum Ratings
Characteristic
Symbol
Notes
Rating
Units
Supply Voltage
VCC
26.5
V
Reverse Battery Voltage
VRCC
–16
V
VOUTPUT
VCC
V
IOUTPUT(Sink)
Internally Limited
–
Output Off Voltage
Output Sink Current
Magnetic Flux Density
B
Operating Ambient Temperature
TA
Maximum Junction Temperature
Storage Temperature
Unlimited
–
–40 to 150
ºC
TJ(max)
165
ºC
Tstg
–65 to 170
ºC
Range L
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
2
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
Functional Block Diagram
VCC
Programmable
Trim
LDO Regulator
4 Bit
Channel A
Amp
OUTPUTA
Low Noise Signal
Recovery
Dynamic Offset
Cancellation
2 Bit
Hall
Element
E1
LowPass
Filter
Output
Drive
Channel B
Amp
OUTPUTB
Low Noise Signal
Recovery
Hall
Element
E2
Dynamic Offset
Cancellation
2 Bit
LowPass
Filter
Output
Drive
GND
Pin-Out Diagrams
Package K
1
2
3
4
Terminal List Table
Package L
Pin Number
1
8
2
7
3
6
4
5
Name
Function
Package K
Package L
1
1
2
2
OUTPUTA Output from E1 via first Schmitt circuit
3
3
OUTPUTB Output from E2 via second Schmitt circuit
4
4
GND
–
5-8
NC
VCC
Connects power supply to on-chip voltage regulator
Terminal for ground connection
No connection
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
3
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
OPERATING CHARACTERISTICS Valid over operating temperature ranges unless otherwise noted; typical data applies to
VCC = 12 V, and TA = 25ºC
Characteristic
Symbol
Test Conditions
Min. Typ. Max.
Unit1
ELECTRICAL CHARACTERISTICS
Supply Voltage2
Output Leakage Current
Supply Current
VCC
3.3
–
18
V
Either output
–
<1
10
μA
ICC(OFF)
B < BRP(A) ,B < BRP(B)
–
3.5
6.0
mA
ICC(ON)
B > BOP(A) ,B > BOP(B)
–
4.5
6.0
mA
Both outputs; IOUTPUT(SINK) = 20 mA; B > BOP(A),
B > BOP(B)
–
160
500
mV
–
–
20
mA
IOUTPUT(OFF)
Operating; TA ≤ 150°C
Low Output Voltage
VOUTPUT(ON)
Output Sink Current
IOUTPUT(SINK)
Output Sink Current, Continuous3
IOUTPUT(SINK)C
TJ < TJ(max) ,VOUTPUT = 12 V
–
–
70
mA
Output Sink Current, Peak4
IOUTPUT(SINK)P
t < 3 seconds
–
–
220
mA
–
780
–
kHz
Chopping Frequency
fC
Output Rise Time
tr
CLOAD = 20 pF, RLOAD = 820 Ω
–
1.8
–
μs
Output Fall Time
tf
CLOAD = 20 pF, RLOAD = 820 Ω
–
1.2
–
μs
Power-On Time
tON
B > 40 G or B < –40 G
–
15
–
μs
Power-Off Time
tOFF
B > 40 G or B < –40 G
–
25
–
μs
Power-On State
POS
B=0G
–
Low
–
–
TRANSIENT PROTECTION CHARACTERISTICS
Supply Zener Voltage
VZ
ICC = 9 mA, TA = 25°C
28
–
–
V
Supply Zener Current5
IZ
VS = 28 V
–
–
9.0
mA
VRCC = –18 V, TJ < TJ(max)
–
2
15
mA
Reverse-Battery Current
IRCC
Continued on the next page...
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
4
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
OPERATING CHARACTERISTICS (continued) Valid over operating temperature ranges unless otherwise noted; typical
data applies to VCC = 12 V, and TA = 25ºC
Characteristic
MAGNETIC
Symbol
Test Conditions
Min. Typ. Max.
Unit1
CHARACTERISTICS6
Operate Point: B > BOP
BOP(A), BOP(B)
–
7
30
G
Release Point: B < BRP
BRP(A), BRP(B)
–30
–7
–
G
BHYS(A), BHYS(B)
5
14
35
G
SYMA, SYMB
–35
–
35
G
Operate Symmetry: BOP(A) – BOP(B)
SYMAB(OP)
–25
–
25
G
Release Symmetry: BRP(A) – BRP(B)
SYMAB(RP)
–25
–
25
G
Hysteresis: BOP(A) – BRP(A),
BOP(B) – BRP(B)
Symmetry: Channel A, Channel B,
BOP(A) + BRP(A), BOP(B) + BRP(B)
11
G (gauss) = 0.1 mT (millitesla).
operating at maximum voltage, never exceed maximum junction temperature, TJ(max). Refer to power derating curve charts.
3 Device will survive the current level specified, but operation within magnetic specification cannot be guaranteed.
4 Short circuit of the output to VCC is protected for the time duration specified.
5 Maximum specification limit is equivalent to I
CC(max) + 3 mA.
6 Magnetic flux density, B, is indicated as a negative value for north-polarity magnetic fields, and as a positive value for south-polarity
magnetic fields. This so-called algebraic convention supports arithmetic comparison of north and south polarity values, where the
relative strength of the field is indicated by the absolute value of B, and the sign indicates the polarity of the field (for example, a
–100 G field and a 100 G field have equivalent strength, but opposite polarity).
2When
EMC
Contact Allegro MicroSystems for EMC performance.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
5
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
THERMAL CHARACTERISTICS may require derating at maximum conditions, see application information
Characteristic
Symbol
Test Conditions*
RθJA
Package Thermal Resistance
Value Units
Package K, 1-layer PCB with copper limited to solder pads
177
ºC/W
Package L-8 pin, 1-layer PCB with copper limited to solder pads
140
ºC/W
Package L-8 pin, 4-layer PCB based on JEDEC standard
80
ºC/W
*Additional thermal data available on the Allegro Web site.
Maximum Allowable VCC (V)
Power Derating Curve
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
VCC(max)
Package L, 4-layer PCB
(RθJA = 80 ºC/W)
Package L, 1-layer PCB
(RθJA = 140 ºC/W)
Package K, 1-layer PCB
(RθJA = 177 ºC/W)
VCC(min)
20
40
60
80
100
120
140
160
180
Temperature (ºC)
Power Dissipation, PD (m W)
Power Dissipation versus Temperature
1900
1800
1700
1600
1500
1400
1300
1200
1100
1000
900
800
700
600
500
400
300
200
100
0
P
(R ack
ag
θJ
A = e
80 L, 4
ºC -la
/W ye
Pa
c
) rP
(R kage
C
θJA
B
L
= 1 , 1lay
40
ºC er P
/W
CB
Pac
)
(R kage K
θJA =
,
177 1-laye
r
ºC/
W) PCB
20
40
60
80
100
120
140
Temperature, TA (°C)
160
180
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
6
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
Electrical Operating Characteristics
ICC(OFF)
ICC(OFF)
8.0
7.0
7.0
Current (mA)
6.0
TA (°C)
5.0
-40
4.0
25
3.0
150
Current (mA)
8.0
1.0
10
15
12
3.0
1.0
5
3.3
4.0
2.0
0
VCC (V)
5.0
2.0
0.0
18
0.0
20
-50
0
50
100
VCC (V)
Temperature (oC)
ICC(ON)
ICC(ON)
8.0
8.0
7.0
7.0
6.0
150
200
-40
4.0
25
3.0
150
2.0
Current (mA)
6.0
TA (°C)
5.0
1.0
VCC (V)
5.0
3.3
4.0
12
3.0
18
2.0
1.0
0.0
0.0
0
5
10
15
20
-50
0
VCC (V)
50
100
150
200
Temperature (oC)
VOUTPUT(on)
500
Voltage (mV)
Current (mA)
6.0
450
VCC (V)
400
Ch. A
350
3.3
300
12
250
18
Ch. B
200
150
3.3
100
12
50
18
0
-50
0
50
100
150
200
Temperature (oC)
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
7
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
Magnetic Operating Characteristics
Channel A, BOP and BRP
Channel A, BOP and BRP
30.0
10.0
BOP
-40
20.0
25
10.0
150
BRP
-40
0.0
-10.0
25
150
-20.0
Switchpoint (G)
20.0
Switchpoint (G)
30.0
TA (°C)
-30.0
VCC (V)
BOP
18
0.0
BRP
-10.0
18
-20.0
5
10
15
20
-50
0
VCC (V)
50
100
150
200
Temperature (oC)
Channel B, BOP and BRP
Channel B, BOP and BRP
30.0
30.0
TA (°C)
20.0
10.0
25
150
BRP
-40
0.0
-10.0
25
-20.0
VCC (V)
20.0
BOP
-40
Switchpoint (G)
Switchpoint (G)
3.3
-30.0
0
150
-30.0
BOP
10.0
3.3
18
0.0
BRP
-10.0
3.3
18
-20.0
-30.0
0
5
10
15
20
-50
0
VCC (V)
50
100
150
200
Temperature (oC)
Channels A and B, BHYS(A) and BHYS(B)
Channels A and B, BHYS(A) and BHYS(B)
30.0
TA (°C)
Ch. A
25.0
25
-40
150
20.0
Ch. B
-40
15.0
25
150
10.0
5.0
35.0
BOP - BRP (G)
35.0
BOP - BRP (G)
3.3
30.0
VCC (V)
BOP
25.0
3.3
18
20.0
BRP
15.0
3.3
18
10.0
5.0
0
5
10
15
Temperature (oC)
20
-50
0
50
100
150
200
VCC (V)
Additional magnetic characteristics on next page
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
8
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
Magnetic Operating Characteristics
BOP Symmetry, SYMAB(OP)
BOP Symmetry, SYMAB(OP)
25.0
25.0
20.0
20.0
15.0
10.0
TA (°C)
5.0
-40
0.0
25
-5.0
150
-10.0
-15.0
Ch. A - Ch. B (G)
Ch. A - Ch. B (G)
15.0
10.0
5.0
VCC (V)
0.0
3.3
-5.0
18
-10.0
-15.0
-20.0
-20.0
-25.0
-25.0
0
5
10
15
-50
20
0
VCC (V)
100
150
200
Temperature (oC)
BRP Symmetry, SYMAB(RP)
BRP Symmetry, SYMAB(RP)
25.0
25.0
20.0
20.0
15.0
15.0
10.0
TA (°C)
5.0
-40
0.0
25
-5.0
150
-10.0
-15.0
-20.0
Ch. A - Ch. B (G)
Ch. A - Ch. B (G)
50
10.0
5.0
VCC (V)
0.0
3.3
-5.0
18
-10.0
-15.0
-20.0
-25.0
0
5
10
15
VCC (V)
20
-25.0
-50
0
50
100
150
200
Temperature (oC)
Additional magnetic characteristics on next page
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
9
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
Magnetic Operating Characteristics
Channel A Symmetry, SYMA
Channel A Symmetry, SYMA
35.0
35.0
25.0
25.0
15.0
TA (°C)
5.0
-40
-5.0
25
150
-15.0
BOP + BRP (G)
BOP + BRP (G)
15.0
VCC (V)
5.0
3.3
-5.0
18
-15.0
-25.0
-25.0
-35.0
-35.0
0
5
10
15
-50
20
0
VCC (V)
100
150
200
Temperature (°C)
Channel B Symmetry, SYMB
Channel B Symmetry, SYMB
35.0
35.0
25.0
25.0
15.0
TA (°C)
5.0
-40
-5.0
25
150
-15.0
-25.0
BOP + BRP (G)
BOP + BRP (G)
50
15.0
VCC (V)
5.0
3.3
-5.0
18
-15.0
-25.0
-35.0
-35.0
0
5
10
VCC (V)
15
20
-50
0
50
100
150
200
Temperature (°C)
10
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
Functional Description
Chopper-Stabilized Technique
A limiting factor for switchpoint accuracy when using Hall effect
technology is the small signal voltage developed across the Hall
plate. This voltage is proportionally small relative to the offset
that can be produced at the output of the Hall IC. This makes it
difficult to process the signal and maintain an accurate, reliable
output over the specified temperature and voltage range.
Chopper-stabilization is a unique approach used to minimize
Hall offset on the chip. The Allegro patented technique, dynamic
quadrature offset cancellation, removes key sources of the output
drift induced by temperature and package stress. This offset
reduction technique is based on a signal modulation-demodulation process. The undesired offset signal is separated from the
magnetically induced signal in the frequency domain through
modulation. The subsequent demodulation acts as a modulation
process for the offset causing the magnetically induced signal
to recover its original spectrum at baseband while the DC offset
becomes a high frequency signal. Then, using a low-pass filter
the signal passes while the modulated DC offset is suppressed.
Allegro’s new innovative chopper-stabilization technique uses a
high frequency clock. This chopper-stabilization approach de-
sensitizes the IC to temperature and stress. The high-frequency
operation also allows a greater sampling rate that produces higher
accuracy and faster signal processing capability. Additionally,
filtering is more effective and results in a lower noise analog
signal at the input to the Schmitt trigger. Therefore, this highfrequency chopping technique reduces jitter, also known as 360°
repeatability, can be induced on the output signal. The sampleand-hold process, used by the demodulator to store and recover
the signal, can slightly degrade the signal to noise ratio. This is
because the process generates replicas of the noise spectrum at the
baseband, causing a decrease in jitter performance. However, the
improvement in switchpoint performance, resulting from the reduction of the effects of thermal and mechanical stress, outweighs the
degradation in the signal to noise ratio.
This technique produces devices that have an extremely stable
quiescent Hall output voltage, are immune to thermal stress,
and have precise recoverability after temperature cycling. This
technique is made possible through the use of a BiCMOS process
which allows the use of low offset and low noise amplifiers in
combination with high-density logic integration and sample and
hold circuits.
Amp
Sample and Hold
Regulator
LowPass
Filter
Chopper stabilization circuit (dynamic quadrature offset cancellation)
11
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
Typical Applications Operation
Switch to High
VOUTPUT(OFF)
Switch to Low
VOUTPUT
V+
VOUTPUT(ON)(sat)
BRP
BOP
B+
BHYS
Output voltage in relation to magnetic flux density received.
Output on each channel independently follows the same
pattern of transition through BOP followed by transition
through BRP.
Channel A
M agnetic Field
at Hall Element E1
Channel B
M agnetic Field
at Hall Element E2
Channel A
Output Signal
at OUTPUTA
Channel B
Output Signal
at OUTPUTB
Quadrature output signal configuration. The outputs of the two
output channels have a phase difference of 90º when used
with a properly designed magnet that has an optimal pole pitch
of twice the Hall element spacing of 1.0 mm.
12
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
Typical Applications Circuits
This device requires minimal protection circuitry
during operation with a low-voltage regulated line.
The on-chip voltage regulator provides immunity
to power supply variations between 3.3 and 18 V.
Because the device has open-drain outputs, pull-up
resistors must be included.
If protection against coupled and injected noise is
required, then a simple low-pass filter on the supply
(RC) and a filtering capacitor on each of the outputs
may also be needed, as shown in the unregulated
supply diagram.
For applications in which the device receives its power
from unregulated sources, such as a car battery, full
protection is generally required to protect the device
against supply-side transients. Specifications for such
transients vary for each application, so the design of
the protection circuit should be optimized for each
application.
For example, the circuit shown in the unregulated
supply diagram includes a Zener diode that offers high
voltage load-dump protection and noise filtering by
means of a series resistor and capacitor. In addition, it
includes a series diode that protects against high-voltage reverse battery conditions.
VOUTPUTB
VOUTPUTA
2
OUTPUTA
VSupply
1
A1230
VCC
OUTPUTB
3
100 7
A
GND
0.1 μF
4
A Resistor is optional,
depending on Conducted
Immunity requirements
Regulated supply
VOUTPUTB
VOUTPUTA
2
OUTPUTA
VSupply
1
A1230
VCC
OUTPUTB
3
100 7
GND
4
0.1 μF
Unregulated supply
13
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
Power Derating
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 application. This section presents a procedure for correlating
factors affecting operating TJ. (Thermal data is also available on
the Allegro MicroSystems Web site.)
The Package Thermal Resistance, RJA, is a figure of merit summarizing 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, RJC, is
relatively small component of RJA. Ambient air temperature,
TA, and air motion are significant external factors, damped by
overmolding.
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.



PD = VIN × IIN
(1)
T = PD × RJA
(2)
TJ = TA + ΔT
(3)
For example, given common conditions such as: TA= 25°C,
VCC = 12 V, ICC = 4 mA, and RJA = 140 °C/W, then:
Example: Reliability for VCC at TA = 150°C, package L, using a
single-layer PCB.
Observe the worst-case ratings for the device, specifically:
RJA = 140°C/W, TJ(max) = 165°C, VCC(max) = 18 V, and
ICC(max) = 6 mA.
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 ÷ RJA = 15°C ÷ 140°C/W = 107 mW
Finally, invert equation 1 with respect to voltage:
VCC(est) = PD(max) ÷ ICC(max) = 107 mW ÷ 6 mA = 18 V
The result indicates that, at TA, the application and device can
dissipate adequate amounts of heat at voltages ≤VCC(est) .
Compare VCC(est) to VCC(max) . If VCC(est) ≤ VCC(max) , then
reliable operation between VCC(est) and VCC(max) requires
enhanced RJA. If VCC(est) ≥ VCC(max) , then operation
between VCC(est) and VCC(max) is reliable under these conditions.
PD = VCC × ICC = 12 V × 4 mA = 48 mW

T = PD × RJA = 48 mW × 140 °C/W = 7°C
TJ = TA + T = 25°C + 7°C = 32°C
A worst-case estimate, PD(max) , represents the maximum allowable power level, without exceeding TJ(max) , at a selected RJA
and TA.
14
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
Package K, 4-pin SIP
+0.08
5.21 –0.05
45°
B
E
E
1.00
2.10
C
1.55 ±0.05
1.32 E
+0.08
3.43 –0.05
E1
E2
2.16
MAX
Mold Ejector
Pin Indent
Branded
Face
45°
1
D Standard Branding Reference View
N = Device part number
Y = Last two digits of year of manufacture
W = Week of manufacture
2
3
4
14.73 ±0.51
+0.06
0.38 –0.03
+0.07
0.41 –0.05
1
0.84 REF
A
0.51
REF
NNNN
YYWW
For Reference Only; not for tooling use (reference DWG-9010)
Dimensions in millimeters
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
A
Dambar removal protrusion (8X)
B
Gate and tie bar burr area
C
Active Area Depth, 0.43 mm REF
D
Branding scale and appearance at supplier discretion
E
Hall elements (E1 and E2); not to scale
1.27 NOM
15
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
Ultra-Sensitive Dual-Channel Quadrature
Hall-Effect Bipolar Switch
A1230
Package L, 8-pin SOICN
4.90 ±0.10
D
D
1.00
1.95
8
A
0.65
8°
0°
1.27
8
1.75
0.21 ±0.04
D
1.95
3.90 ±0.10 6.00 ±0.20
E1
E2
B
5.60
+0.43
0.84 –0.44
1.04 REF
1
2
0.25 BSC
8X
SEATING
PLANE
0.10 C
C
1
B
SEATING PLANE
GAUGE PLANE
PCB Layout Reference View
+0.13
1.62 –0.27
0.41 ±0.10
1.27 BSC
+0.10
0.15 –0.05
NNNNNNN
YYWW
LLLL
For Reference Only; not for tooling use (reference DWG-9204)
Dimensions in millimeters
Dimensions exclusive of mold flash, gate burrs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
A
2
1
C
Active Area Depth, 0.40 mm REF
B Reference land pattern layout (reference IPC7351
SOIC127P600X175-8M); 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 Branding scale and appearance at supplier discretion
Standard Branding Reference View
N = Device part number
= Supplier emblem
Y = Last two digits of year of manufacture
W = Week of manufacture
L = Lot number
D Terminal #1 mark area
Copyright ©2010, Allegro MicroSystems, Inc.
Allegro MicroSystems, Inc. reserves the right to make, from time to time, such departures from the detail specifications as may be required to permit 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
16
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com