A19350LUBATN-RBE [ALLEGRO]
High Accuracy GMR Wheel Speed and Direction Sensor IC;型号: | A19350LUBATN-RBE |
厂家: | ALLEGRO MICROSYSTEMS |
描述: | High Accuracy GMR Wheel Speed and Direction Sensor IC |
文件: | 总14页 (文件大小:1188K) |
中文: | 中文翻译 | 下载: | 下载PDF数据表文档文件 |
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
FEATURES AND BENEFITS
DESCRIPTION
• GMR technology integrates high sensitivity MR
(magnetoresistive) sensor elements and high precision
BiCMOS circuits on a single silicon integrated circuit,
offering high accuracy, low magnetic field operation
• Integrated capacitor in a single overmolded miniature
package provides greater EMC robustness
• SolidSpeed Digital Architecture™ supports advanced
algorithms, maintaining performance in the presence of
extreme system-level disturbances, including vibration
immunity capability over the full target pitch
• Flexible orientation for xMR or Hall replacement
• ASIL B rating based on integrated diagnostics and
certified safety design process
The A19350 is a giant magnetoresistance (GMR) integrated
circuit (IC) that provides a user-friendly two-wire solution for
applicationswherespeedanddirectioninformationisrequired.
The small integrated package includes an integrated capacitor
and GMR IC in a single overmold design with an additional
molded lead-stabilizing bar for robust shipping and ease of
assembly.
The GMR-based IC is designed for use in conjunction with
front-biased ring magnet encoders. State-of-the-art GMR
technologywithindustry-leadingsignalprocessingalgorithms
accuratelyswitchinresponsetolow-leveldifferentialmagnetic
signals.ThehighsensitivityofGMRcombinedwithdifferential
sensing offers inherent rejection of interfering common-mode
magnetic fields and valid speed and direction over larger air
gaps, commonly required in wheel speed sensing applications.
• Two-wire current source output pulse-width protocol
supporting speed, direction, and ASIL
• EEPROM offers device traceability throughout the
production process
Patented GMR technology allows the same orientation as
Hall-effect for a drop-in solution in the application.
2
Integrated diagnostics are used to detect an IC failure which
impacts the output protocol’s accuracy, providing coverage
compatiblewithASILBcompliance.Built-inEEPROMscratch
memory offers traceability of the device throughout the IC’s
production process.
-
PACKAGE:
2-Pin SIP
The IC is offered in the UB package, which integrates the IC
and a high-temperature ceramic capacitor in a single overmold
SIP package for enhanced EMC performance. The 2-pin SIP
package is lead (Pb) free, with tin leadframe plating.
(suffix UB)
Not to scale
VCC
+
ADC
Output
–
Current
Generator
ESD
Analog-to-Digital
Front End
Amplification
Digital
Controller
GMR
Elements
and
Signal Conditioning
+
–
ADC
GND
EEPROM
Oscillator
Diagnostics
Regulator
Figure 1: Functional Block Diagram
A19350-DS
November 16, 2018
MCO-0000526
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
SELECTION GUIDE*
Part Number
Packing
A19350LUBATN-FBE
A19350LUBATN-RBE
Tape and Reel, 4000 pieces per reel
* Not all combinations are available. Contact Allegro sales for availability and pricing of custom program-
ming options.
Complete Part Number Format
Configuration Options
-
A19350
L
UꢄA
ꢃN -
ASIL Protocol:
A ꢀ ASIL Protocol Enabled
[blank] ꢀ ASIL Protocol Disabled
Warning and Standstill Pulses:
ꢁ ꢀ Warning and standstill pulses enabled
M ꢀ Warning and standstill pulses disabled
Non-Direction Pulses:
ꢄ ꢀ Blanked, no output during standstill
P ꢀ Warning pulses during standstill
Rotation Direction:
ꢂ ꢀ Forward Rotation, pin 1 to pin 2
R ꢀ Forward Rotation, pin 2 to pin 1
Instructions (Packing) :
ꢃN ꢀ Tape and reel
Package Designation
Operating Temperature Range
Allegro Identifier and Device Type
2
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
SPECIFICATIONS
ABSOLUTE MAXIMUM RATINGS
Characteristic
Symbol
Notes
Rating
28
Unit
V
Supply Voltage
VCC
VRCC
TA
Refer to Power Derating section; potential between pin 1 and pin 2
Reverse Supply Voltage
–18
V
Operating Ambient Temperature
Maximum Junction Temperature
Storage Temperature
–40 to 150
165
°C
°C
°C
G
TJ(max)
Tstg
–65 to 170
500
Applied Magnetic Flux Density
B
In any direction
INTERNAL DISCRETE CAPACITOR RATINGS
Characteristic
Symbol
Test Conditions
Value
Unit
Nominal Capacitance
CSUPPLY
Connected between pin 1 and pin 2 (refer to Figure 2)
2.2
nF
PINOUT DIAGRAM AND TERMINAL LIST
VCC
1
A19350
IC
1
2
2
VOUT = ICC × RL
CL
RL
Package UB, 2-Pin SIP Pinout Diagram
Terminal List Table
GND
Pin Name
Pin Number
Function
Supply Voltage
Ground
VCC
GND
1
2
Figure 2: Application Circuit
3
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
OPERATING CHARACTERISTICS: Valid throughout full operating voltage and temperature ranges, unless otherwise specified
Characteristic
ELECTRICAL CHARACTERISTICS
Supply Voltage[2]
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
VCC
Potential between pin 1 and pin 2
VCC = VRCC(MAX)
4
–
–
24
–
V
Reverse Supply Current[3]
Supply Zener Clamp Voltage
IRCC
–10
28
mA
V
VZsupply
ICC(LOW)
ICC(HIGH)
ICC = ICC(MAX) + 3 mA, TA = 25°C
Low-current state
–
–
5.9
12
7
8.4
16
mA
mA
Supply Current
High-current state
14
ICC(HIGH)
ICC(LOW)
/
Measured as a ratio of high current to low
current (isothermal)
Supply Current Ratio [4]
ASIL Safety Current
1.9
–
–
–
IRESET
Refer to Figure 11
1.5
–
3.5
90
–
3.9
–
mA
μs
tRESET(EP1) Refer to Figure 11 (Error Protocol 1)
tRESET(EP2) Refer to Figure 11 (Error Protocol 2)
Voltage measured at terminal 2 in Figure 2;
ASIL Safety Current Time
Output Rise/Fall Time
3
6
ms
tr, tf
RL = 100 Ω, CL = 10 pF, measured between
–
2
4
µs
10% and 90% of signal
POWER-ON CHARACTERISTICS
Power-On State
POS
tPO
V
CC > VCC(min) as connected in Figure 1
ICC(LOW)
–
mA
ms
Power-On Time
VCC > VCC(min) as connected in Figure 1 [5]
–
1
OUTPUT PULSE-WIDTH PROTOCOL [6]
Pulse-Width Off Time
tW(PRE)
38
76
45
90
52
104
207
52
μs
μs
μs
μs
μs
ms
Forward Pulse Width
Reverse Pulse Width
Warning Pulse Width
Standstill Pulse Width
Standstill Period[7]
tW(FWD)
tW(REV)
tW(WARN)
tW(STILL)
tSTOP
153
38
180
45
-xxE variant
-xxE variant
-xxE variant
1232
590
1440
737
1656
848
[1] Typical values are at TA = 25°C and VCC = 12 V. Performance may vary for individual units, within the specified maximum and minimum limits.
[2] Maximum voltage must be adjusted for power dissipation and junction temperature; see representative Power Derating section.
[3] Negative current is defined as conventional current coming out of (sourced from) the specified device terminal.
[4] Supply current ratio is taken as a mean value of ICC(HIGH) / ICC(LOW)
.
[5] Time between power-on to ICC stabilizing. Output transients prior to tPO should be ignored.
[6] Pulse width measured at threshold of (ICC(HIGH) + ICC(LOW)) / 2.
[7] At operating frequencies less than 2 Hz, -xxM variant must be used in order to output forward/reverse/warning direction pulses.
Continued on the next page…
4
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
OPERATING CHARACTERISTICS (continued): Valid throughout full operating voltage and temperature ranges,
unless otherwise specified
Characteristic
Symbol
Test Conditions
Min.
Typ. [1]
Max.
Unit
INPUT CHARACTERISTICS AND PERFORMANCE
Operating Frequency,
fFWD
0
0
0
5
–
–
–
–
3.9
2.4
6.4
–
kHz
kHz
kHz
G
Forward Rotation [8]
Operating Frequency,
fREV
Reverse Rotation [8]
Operating Frequency,
fWARN
Warning Pulses [8]
Peak-to-peak of differential magnetic input
(refer to Figure 6)
Operating Differential Magnetic Input [9] BDIFF(pk-pk)
Peak-to-peak allowable for repeatability
(refer to Figure 6)
20
–50
60
–
–
–
–
G
G
%
Operating Differential Magnetic Range [8]
BDIFF
Refer to Figure 6
50
BSEQ(n+1)
BSEQ(n)
/
Signal period-to-period variation (refer to Figure 3)
200
Allowable Differential Sequential
Signal Variation
BSEQ(n+i)
BSEQ(n)
/
Overall signal variation (e.g. run-out) (refer to
Figure 3)
40
–
200
%
Operate Point
Release Point
BOP
BRP
% of peak-to-peak IC-processed signal
% of peak-to-peak IC-processed signal
–
–
60
40
–
–
%
%
Constant air gap (greater than 20 G(pk-pk)),
temperature, and target speed. Sinusoidal input
signal. Greater than 1000 output edges captured.
Repeatability [10]
Target Pitch
ErrθE
–
–
–
–
0.3
8
%
TPITCH
Arc length of each pole-pair (at 0 mm air gap)
1.4
20
mm
Required amount of amplitude separated
BDIFF(SP-SEP) between channels at each BOP and BRP
occurrence. (refer to Figure 5)
Switch Point Separation
–
%pk-pk
THERMAL CHARACTERISTICS
Magnetic Temperature Coefficient[11]
Package Thermal Resistance
TC
Valid for full temperature range based on ferrite
Single-layer PCB with copper limited to solder pads
–
–
0.2
–
–
%/°C
°C/W
RθJA
213
[8] If a higher frequency operation is required, an option is available.
[9] Differential magnetic field is measured for the Channel A (E1-E3) and Channel B (E2-E4). Each channel’s differential magnetic field is measured between two GMR elements spaced by
1.4 mm. Magnetic field is measured in the GMR element spacing orientation in the By direction (Refer to Figure 7). To maintain optimal performance, it is recommended that the |Bx|
field be less than 80 G.
[10] Repeatability (i.e. jitter) is tested to 6 sigma and is guaranteed by design and characterization only.
[11] Ring magnet decreases in magnetic strength with rising temperature, and the device compensates. Note that BDIFF(pk-pk) requirement is not influenced by this.
5
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
B SEQ(n)
Target
S
N
S
N
B SEQ(n + 1)
B SEQ(n+i) , i ≥ 2
TCYCLE
BDIFF
BDIFF = Differential Input Signal; the differential magnetic
flux sensed by the sensor
TCYCLE = Target Cycle; the amount of rotation that
moves one north pole and one south pole
across the sensor
Figure 3: Differential Signal Variation
Figure 4: Definition of TCYCLE
ꢄꢅꢆꢇꢇ
ꢁꢂꢃꢄꢄꢅmaꢆꢇ
S
N
S
N
TCYCLE
Aꢈꢈlied ꢁꢂꢃꢄꢄ
ꢁꢂꢃꢄꢄꢅꢈꢉ-ꢈꢉꢇ
0 ꢀ
BDIFF(SP)
BDIFF(BOP)
(BOP
)
Channel B
BDIFF(pk-pk)
(BRP
)
BDIFF(BRP)
BDIFF(SP)
Channel A
ꢁꢂꢃꢄꢄꢅminꢇ
BDIFF(SP)
BDIFF(SP-SEP)
=
ꢀꢁꢂꢃ
BDIFF(pk-pk)
Figure 6: Input Signal Definition
Figure 5: Definition of Switch Point Separation
6
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
FUNCTIONAL DESCRIPTION
The A19350 sensor IC contains a single-chip GMR circuit that uses
spaced elements. These elements are used in differential pairs to
provide electrical signals containing information regarding edge
position and direction of rotation. The A19350 is intended for use
with ring magnet targets as shown in Figure 8. The IC detects the
peaks of the magnetic signals and sets dynamic thresholds based on
these detected signals.
N
N
S
Pacꢇage Case ꢀranded ꢈace
Device Orientation to Target
ꢀꢁ
ꢅPin ꢄ Sideꢆ
Channel ꢀ
ꢂꢃ ꢂ3 ꢂꢄ ꢂ1
ꢅPin 1 Sideꢆ
ꢀꢁ
ꢅꢋoꢌ ꢍiew oꢎ
Pacꢇage Caseꢆ ꢂlement Pitch
Channel A
ꢂlement Pitch
ꢀy
ꢀꢂ
Mechanical Position (Target moves past device pin 1 to pin 2)
ꢋarget
ꢋhis ꢌole
ꢋhis ꢌole
ꢅRadial Ring Magnetꢆ
sensed later
sensed earlier
ꢂ
ꢃ
ꢃ
Target Magnetic Profile
Channel
ꢂlement Pitch
ꢉꢀ
Pin 1
ꢊꢀ
IC Internal Differential Analog Signals, BDIFF
ꢀꢁP
ꢀꢁP
Channel A
Figure 7: Package Orientation
ꢀRP
ꢀꢁP
Channel ꢀ
ꢀRP
Detected Channel Switching
Channel A
Channel ꢀ
Rotation
Output (pulse protocol)
Pin 1
ꢏCCꢅHꢏꢐHꢆ
ꢏCCꢅLꢁꢑꢆ
Figure 9: Basic Operation
Figure 8: Parallel Orientation
Forward Rotation. For the -Fxx variant, when the target is
rotating such that a target feature passes from pin 1 to pin 2, this
is referred to as forward rotation. This direction of rotation is indi-
cated on the output by a tW(FWD) pulse width. For the -Rxx variant,
forward direction is indicated for target rotation from pin 2 to 1.
Data Protocol Description
When a target passes in front of the device (opposite the branded
face of the package case), the A19350 generates an output pulse
for each magnetic pole-pair of the target. Speed information is
provided by the output pulse rate, while direction of target rota-
tion is provided by the duration of the output pulses. The sensor
IC can sense target movement in both the forward and reverse
directions.
Reverse Rotation. For the -Fxx variant, when the target is
rotating such that a target feature passes from pin 2 to pin 1, this is
referred to as reverse rotation. This direction of rotation is indi-
cated on the output by a tW(REV) pulse width. For the -Rxx variant,
reverse direction is indicated for target rotation from pin 1 to 2.
7
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
Output edges are triggered by BDIFF transitions through the
switch points. On a crossing, the output pulse of ICC(HIGH) is pres-
ASIL Safe State Output Protocol
The A19350 sensor IC contains diagnostic circuitry that will
continuously monitor occurrences of failure defects within the IC.
Refer to Figure 11 for the output protocol of the ASIL safe state
after an internal defect has been detected. Error Protocol 1 will
result from faults due to over frequency conditions from the input
signal. Error Protocol 2 will result from hard failures detected
within the A19350 such as a regulator and front end fault.
ent for tw(FWD) or tw(REV)
.
The IC is always capable of properly detecting input signals up to
the defined operating frequency. At frequencies beyond the oper-
ational frequencies specifications (refer to Operational Frequency
specifications noted on page 5), the ICC(HIGH) pulse duration will
collide with subsequent pulses.
Note: If a fault exists continuously, the device will stay in perma-
nent safe state. Refer to the A19350 Safety Manual for additional
details on the ASIL Safe State Output Protocol.
N
S
N
ICC(HIGH)
tw(FWD)
tw(FWD)
tw(FWD)
ICC(LOW)
Figure 10: Output Timing Example
Magnetic
ꢀncoder
ꢀ
ꢁ
ꢀ
ꢁ
ꢀ
ꢁCCꢂHꢁꢃHꢄ
Normal
ꢅꢋeration
ꢁCCꢂLꢅꢆꢄ
ꢁCCꢂHꢁꢃHꢄ
ꢀrror
ꢀrror
Protocol 1
ꢁCCꢂLꢅꢆꢄ
ꢁRꢀSꢀꢇ
ꢈirst ꢉirection ꢅꢊtꢋꢊt Pꢊlse
tRꢀSꢀꢇꢂꢀP1ꢄ
ꢁCCꢂHꢁꢃHꢄ
ꢀrror
ꢀrror
Protocol ꢌ
ꢁCCꢂLꢅꢆꢄ
ꢁRꢀSꢀꢇ
ꢈirst ꢉirection ꢅꢊtꢋꢊt Pꢊlse
tRꢀSꢀꢇꢂꢀPꢌꢄ
Figure 11: Output Protocol of the -xBx Variant (ASIL Safe State)
8
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
Calibration and Direction Validation
When power is applied to the A19350, the built-in algorithm per-
forms an initialization routine. For a short period after power-on,
the device calibrates itself and determines the direction of target
rotation. For the -xPx variant, the output transmits non-direction
pulses during calibration (Figure 12). For the -xBx variant, the
output does not transmit any pulses during calibration.
Once the calibration routine is complete, the A19350 will trans-
mit accurate speed and direction information.
Target Rotation
N
S
N
S
N
S
N
S
N
Target
Differential
Magnetic
Profile
tW(FWD) or
tW(REV)
tW(FWD) or
tW(REV)
Opposite
North Pole
Opposite
N→S Boundary
ICC
Opposite
South Pole
tW(FWD)
tW(FWD)
tW(FWD)
Opposite
S→N Boundary
t
Device Location at Power-On
Figure 12: Calibration Behavior of the -xPx Variant
9
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
Direction Changes, Vibrations, and
Anomalous Events
During normal operation, the A19350 will be exposed to changes The -xPx variant may transmit non-direction pulses during vibra-
in the direction of target rotation (Figure 13), vibrations of the
target (Figure 14), and anomalous events such as sudden air
gap changes. These events cause temporary uncertainty in the
A19350’s internal direction detection algorithm.
tions, while the -xBx variant will not transmit any pulses during
vibrations.
Direc�on
Change
Forward
Reverse
Rota�on
Rota�on
N
S
N
S
N
S
N
S
N
Target Differen�al
Magne�c Profile
tW(FWD)
tW(REV)
ICC
Figure 13: Direction Change Behavior
Normal Target Rotation
Normal Target Rotation
Vibration
N
S
N
S
N
S
S
N
S
N
Target
Differential
Magnetic
Profile
tW(FWD)
tW(REV)
or
tW(REV)
tW(FWD)
[or tW(REV)
tW(FWD)
[or tW(REV)
tW(FWD)
[or tW(REV)]
tW(FWD)
[or tW(REV)
]
]
[or tW(FWD)
]
]
Figure 14: Vibration Behavior
10
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
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 appli-
cation. This section presents a procedure for correlating factors
affecting operating TJ. (Thermal data is also available on the
Allegro MicroSystems website.)
A worst-case estimate, PD(max), represents the maximum allow-
able power level (VCC(max), ICC(max)), without exceeding TJ(max)
at a selected RθJA and TA.
,
Example: Reliability for VCC at TA = 150°C.
Observe the worst-case ratings for the device, specifically:
RθJA = 213°C/W (subject to change), TJ(max) = 165°C, VCC(max)
= 24 V, and ICC(AVG) = 14.8 mA. ICC(AVG) is computed using
ICC(HIGH)(max) and ICC(LOW)(max), with a duty cycle of 84% com-
puted from tw(REV)(max) on-time and tw(PRE)(min) off-time (pulse-
width protocol).
The Package Thermal Resistance, RθJA, 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, RθJC, is
a relatively small component of RθJA. 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:
ΔTmaxꢀ=ꢀ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:
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(max)ꢀ=ꢀΔTmax ÷ RθJAꢀ=ꢀ15°Cꢀ÷ꢀ213°C/Wꢀ=ꢀ70.4ꢀmWꢀ
Finally, invert equation 1 with respect to voltage:
PD = VIN × IIN
ΔTꢀ=ꢀPD × RθJA
TJꢀ=ꢀTAꢀ+ꢀΔTꢀꢀ
(1)
(2)
(3)
V
CC(est) = PD(max) ÷ ICC(max)ꢀ=ꢀ70.4ꢀmWꢀ÷ꢀ14.8ꢀmAꢀ=ꢀ4.8ꢀVꢀ
The result indicates that, at TA , the application and device can
dissipate adequate amounts of heat at voltages ≤ VCC(est)
ꢀ
ꢀ
.
For example, given common conditions such as:
TA= 25°C, VCC = 12 V, ICC = 7.15 mA, and RθJA = 213°C/W,
then:
Compare VCC(est) to VCC(max). If VCC(est) ≤ VCC(max), then reli-
able operation between VCC(est) and VCC(max) requires enhanced
RθJA. If VCC(est) ≥ VCC(max), then operation between VCC(est) and
VCC(max) is reliable under these conditions.
PD = VCC × ICC = 12 V × 7.15 mA = 85.8 mW
ΔTꢀ=ꢀPD × RθJA = 85.8 mW × 213°C/W = 18.3°C
TJꢀ=ꢀTAꢀ+ꢀΔTꢀ=ꢀ25°Cꢀ+ꢀ18.3°Cꢀ=ꢀ43.3°C
11
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
Power Derating Curve
25
24
23
V
CC(max)
22
21
20
19
18
17
16
15
14
13
12
11
10
9
1-layer PCB, Package UB
(RθJA = 213ºC/W)
8
7
6
5
4
3
V
CC(min)
2
20
40
60
80
100
120
140
160
180
Temperature (ºC)
Power Dissipation versus Ambient Temperature
1900
1800
1700
1600
1500
1400
1300
1200
1100
1000
900
1-layer PCB, Package UB
(RθJA = 213ºC/W)
800
700
600
500
400
300
200
100
0
20
40
60
80
100
120
140
160
180
Temperature (°C)
12
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
PACKAGE OUTLINE DRAWING
For Reference Only – Not for Tooling Use
(Reference DWG-0000408, Rev. 3)
Dimensions in millimeters – NOT TO SCALE
Dimensions exclusive of mold flash, gate burs, and dambar protrusions
Exact case and lead configuration at supplier discretion within limits shown
+0.06
–0.05
4.00
B
4×10°
1.50 ±0.05
0.84
C
0.56
1.02
0.56
1.39
Mold Ejector
Pin Indent
XXXXX
Date Code
Lot Number
+0.06
4.00
–0.07
E
E1
E4
E3
E
E
E2
E
45°
Branded
Face
D
Standard Branding Reference View
A
0.42 ±0.05
0.85 ±0.05
Line 1ꢀ 5 characters
Lines ꢁ, 3ꢀ 5 characters
4 × 2.50 ±0.10
0.25 REF
0.30 REF
2.54 REF
Line 1ꢀ Part Nꢂmꢃer
Line ꢁꢀ ꢄ-digit date code
Line 3ꢀ Characters 5, ꢅ, ꢆ, ꢇ oꢈ
Assemꢃly Lot Nꢂmꢃer
ꢉꢊceꢋtion allowed ꢈor ꢋarts with
mꢂltiꢋle ꢋacꢌage ꢍariantsꢀ
Line 1ꢀ Last ꢄ digits oꢈ ꢋart nꢂmꢃer ꢋlꢂs
Pacꢌage ꢎariant
1
2
18.00 ±0.10
12.20 ±0.10
4 × 7.37 REF
1.00 ±0.05
+0.07
–0.03
0.25
1.80 ±0.10
A
B
C
D
E
F
Dambar removal protrusion (8×)
Gate and tie burr area
Active Area Depth, 0.38 ±0.03 mm
0.38 REF
0.25 REF
Branding scale and appearance at supplier discretion
GMR elements (E1, E2, E3, and E4); not to scale
Molded Lead Bar for preventing damage to leads during shipment
4 × 0.85 REF
0.85 ±0.05
+0.06
–0.07
1.80
F
+0.06
4.00
1.50 ±0.05
–0.05
Figure 15: Package UB, 2-Pin SIP
13
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
A19350
High Accuracy GMR Wheel Speed and Direction Sensor IC
Revision History
Number
Date
Description
–
November 16, 2018 Initial release
Copyright ©2018, Allegro MicroSystems, LLC
Allegro MicroSystems, LLC 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 any devices or systems, including but not limited to life support devices or systems, in which a failure of
Allegro’s product can reasonably be expected to cause bodily harm.
The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no responsibility for its
use; nor for any infringement of patents or other rights of third parties which may result from its use.
Copies of this document are considered uncontrolled documents.
For the latest version of this document, visit our website:
www.allegromicro.com
14
Allegro MicroSystems, LLC
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A.
www.allegromicro.com
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