A19303PUBATN-RPLG

A19303 ALLEGRO

Document overview

• Manufacturer or author: Provided By www.digicamel.com(free datasheet download site)
• PDF pages: 16

Technical content

The A19303 is an optimized Hall-effect integrated circuit (IC) with PW and AK Protocol that provides a user-friendly two-wire solution for applications where pitch accuracy is important for the determination of speed and direction of the sensed target. The small package includes an integrated capacitor and Hall-based IC in a single overmolded design, with an additional molded lead-stabilizing bar for robust shipping and ease of assembly. The IC’s SolidSpeed Digital Architecture offers intelligent algorithms capable of maintaining stable operation during dynamic air gap movements. The sophisticated digital controller provides highly accurate speed and direction information with vibration detection ideal for ABS applications. The IC includes built-in EEPROM scratch memory available for device traceability throughout sensor module production. The IC is offered in the UB package, which integrates the IC and a high temperature ceramic capacitor in a single overmolded SIP package for enhanced EMC performance. The 2-pin SIP package is lead (Pb) free, with tin leadframe plating. A19303-DS MCO-0001363

• Hall-effect technology allows ease of use for ring magnet and ferromagnetic target sensing with back- biased magnet
• Vibration detection optimized for wheel speed applications allows for blanking of vibration on vibration with minimum delay in output recovery
• Digital PW and AK protocol provides speed and direction information, signal integrity, and functional status
• Integrated capacitor in a single overmolded miniature package provides greater EMC robustness
• SolidSpeed Digital Architecture supports advanced algorithms, maintaining pitch accuracy during dynamic air gap disturbances
• EEPROM enables traceability throughout the product life cycle Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor IC Figure 1: Functional Block Diagram A19303 Oscillator EEPROM Digital Controller L-C Output Regulator VCC ADC ADC C-R VCC GND ESDOutput Current Generator FEATURES AND BENEFITS DESCRIPTION March 9, 2023 PACKAGE: Not to scale 2-Pin SIP (suffix UB)

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A. www.allegromicro.com SELECTION GUIDE [1] Part Number Packing A19303LUBATN-FPHE Tape and reel, 4000 pieces per reel [1] Not all combinations are available. Contact Allegro sales for availability and pricing of custom programming options. Configuration Options A19303 F – Pin 1 to pin 2 R– Pin 2 to pin 1 Forward Rotation Direction: PT N- Packing Instructions Package Designation Operating Temperature Range Allegro Identifier and Device Type UBA Protocol Options: P– PW protocol: warning, extended air gap, and standstill pulses enabled Vibration Immunity: L– Low vibration immunity with immediate direction change detection High vibration immunityH AK protocolA Magnetic Temperature Compensation: G– Samarium-cobalt magnet Ferrite ring magnet or neodymium magnet E

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Notes Rating Unit Supply Voltage VCC Refer to Power Derating section; potential between pin 1 and pin 2 28 V Reverse Supply Voltage VRCC –18 V Operating Ambient Temperature TA –40 to 150 °C Junction Temperature TJ(max) 165 °C Storage Temperature Tstg –65 to 170 °C INTERNAL DISCRETE CAPACITOR RATINGS Characteristic Symbol Test Conditions Value (Typ.) Unit Nominal Capacitance CSUPPLY Connected between pin 1 and pin 2 (refer to Figure 2) 2.2 nF Figure 2: Typical Application Circuit Package CSUPPLY VCC VOUT = ICC × RL CL RL Silicon SPECIFICATIONS PINOUT DIAGRAM 2-Pin SIP Pinout Diagram PINOUT TABLE Name Number Function VCC 1 Supply Voltage GND 2 Ground

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Characteristic Symbol Test Conditions Min. Typ.[1] Max. Unit ELECTRICAL SUPPLY CHARACTERISTICS Supply Voltage [2] VCC Potential between pin 1 and pin 2 -xPxx variant 4 – 24 V -xAxx variant 5.2 – 24 V Undervoltage Lockout (UVLO) Hysteresis VHYS(AK) -xAxx variant 1.1 – – V Reverse Supply Current [3] IRCC VCC = VRCC(max) –10 – – mA Supply Zener Clamp Voltage VZsupply ICC = 36.6 mA 28 – – V Supply Current ICC(LOW) Low-current state 5.9 7 8.4 mA ICC(MID) Mid-current state 12 14 16 mA ICC(HIGH) High-current state 23.52 28.0 33.6 mA Supply Current Ratio [4] ICC(MID) / ICC(LOW) Measured as ratio of mid current to low current (isothermal) 1.9 – – – ICC(HIGH) / ICC(LOW) Measured as ratio of high current to low current (isothermal) 3.6 – – – Output Rise/Fall Time tr, tf Voltage measured at pin 2 in Figure 2; RL = 100 Ω, CL = 10 pF, measured between 10% and 90% of ICC(LOW) and ICC(MID) (-xPxx variants) 0 – 1.5 μs Slew Rate SR Measured at pin 2 in Figure 2; RL = 50 Ω, CL = 10 pF, measured between 10% and 90% of ICC(LOW) and ICC(HIGH) or ICC(LOW) and ICC(MID) (-xAxx variant) 8 – 28 mA/µs POWER-ON CHARACTERISTICS Power-On State POS VCC > VCC(min), as connected in Figure 2 ICC(LOW) mA Power-On Time [5] tPO VCC > VCC(min), as connected in Figure 2 – 0.25 1 ms OPERATING CHARACTERISTICS AND PERFORMANCE Operating Differential Magnetic Input [6] BDIFF(pk-pk) Peak-to-peak of differential magnetic input Operating Differential Magnetic Range [6] BDIFF Refer to Figure 6 –700 – 700 G Operating Magnetic Input Signal Variation ∆BDIFF(pk-pk) Bounded amplitude ratio within TWINDOW [7]; no missed output transitions or flat line condition; possible incorrect direction information; see Figure 4 and Figure 5 0.6 – – – Operating Magnetic Input Signal Window TWINDOW Rolling window where ∆BDIFF(pk-pk) cannot exceed bounded ratio; see Figure 4 and Figure 5 4 – – TCYCLE Calibration Period TCAL Period between power-on and valid speed and correct direction output (f ≤ 200 Hz) – – 2 TCYCLE Operate Point BOP % of peak-to-peak IC-processed signal – 50 – % Release Point BRP % of peak-to-peak IC-processed signal – 50 – % Switch Point Hysteresis BHYS – 15 – % OPERATING CHARACTERISTICS : Valid over operating voltage and temperature, unless otherwise specified Continued on next page...

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Characteristic Symbol Test Conditions Min. Typ.[1] Max. Unit Switch Point Separation BDIFF(SP-SEP) Required amount of amplitude separation between channel A and channel B at each BOP and BRP occurrence. Channels must be in phase; see Figure 7 32.5 – – % OUTPUT PROTOCOL CHARACTERISTICS [8] (-xAxx variant) Bit Width tp Refer to Figure 8 40 50 60 µs Standstill Period tSTOP 105 150 195 ms AK Off Time tW(PRE) Pre-low time – 75 – µs Air Gap Reserve Level BLR Signal amplitude that engages AK LR bit – 24 – Gpk-pk Operating Frequency [9] fSIG 0 – 2.5 kHz OUTPUT PROTOCOL CHARACTERISTICS [8] (-xPxx variant) Pulse Width Off Time tW(PRE) Refer to Figure 9 38 45 52 µs Forward Pulse Width tW(FWD) 76 90 104 µs Reverse Pulse Width tW(REV) 153 180 207 µs EA Forward Pulse Width tW(EA FWD) 306 360 414 µs EA Reverse Pulse Width tW(EA REV) 612 720 828 µs Warning Pulse Width tW(WARN) 38 45 52 µs Standstill Pulse Width tW(STILL) 1232 1440 1656 µs Standstill Period tSTOP 590 737 848 ms Operating Frequency, Forward Pulses [9] [10] fFWD 0 – 3.9 kHz Operating Frequency, Reverse Pulses [9] [10] fREV 0 – 2.4 kHz Operating Frequency, Warning Pulses [9] [10] fWARN 0 – 5 kHz Operating Frequency, EA Pulses [9] [10] fEA EA pulses output when f < fEA and BDIFF(pk-pk) < BEA – 117 – Hz Air Gap Warning Level BWARN Warning pulses output when BDIFF(pk-pk) < BWARN – 24 – Gpk-pk Extended Air Gap Level BEA EA pulses output when f < fEA and BDIFF(pk-pk) < BEA – 84 – Gpk-pk OPERATING CHARACTERISTICS (continued): Valid over operating voltage and temperature, unless otherwise specified Continued on next page...

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com OPERATING CHARACTERISTICS (continued): Valid over operating voltage and temperature, unless otherwise specified Characteristic Symbol Test Conditions Min. Typ.[1] Max. Unit THERMAL CHARACTERISTICS Magnetic Temperature Coefficient [11] TC Based on ferrite ring magnet and neodymium magnet (-xxxE variant) – 0.16 – %/°C Based on samarium-cobalt magnet (-xxxG variant) – 0.04 – %/°C Package Thermal Resistance [12] RθJA Single-layer PCB with copper limited to solder pads – 213 – °C/W PERFORMANCE CHARACTERISTICS Vibration Immunity Output will be blanked for vibration magnitudes less than defined TCYCLE (-xxHx variant) – – 1 TCYCLE Vibration Recovery Amount of constant rotation post vibration scenario before output pulses resume (-xxHx variant) – – 2 TCYCLE Pulse After Direction Change -xxHx variant – – 1.75 TCYCLE [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; refer to 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(MID) / ICC(LOW) and ICC(HIGH) / ICC(LOW). [5] Output transients prior to tPO should be ignored. [6] Differential magnetic field is measured for Channel A (E1-E2) and Channel B (E2-E3) independently. Each channel’s differential magnetic field is measured between two Hall elements. Magnetic field is measured orthogonally to the front of the package. BDIFF(pk-pk) only valid at TA(max) due to magnetic temperature compensation. Refer to UB package drawing. [7] Symmetrical signal variation is defined as the largest amplitude ratio from Bn to Bn + TWINDOW. Signal variation may occur continuously while BDIFF remains in the operating magnetic range. [8] Pulse width measured at threshold of (ICC(MID) + ICC(LOW)) / 2 and (ICC(HIGH) + ICC(LOW)) / 2. [9] Frequency is based on BDIFF frequency. [10] These frequency ranges are based on valid pulse width generation with each pulse width preceding with a tw(PRE)(MAX). [11] Magnets decrease in strength with increasing temperature. The device temperature coefficient compensates to help maintain a consistent maximum air gap over temperature. [12] Additional thermal information is available on the Allegro website.

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Target S S BDIFF TCYCLE N S N Target Cycle; the amount of rotation that moves one north and one south pole across the sensorTCYCLE = The differential magnetic flux density sensed by the sensorBDIFF = Figure 3: Definition of TCYCLE Figure 4: Single Period-to-Period Variation Figure 5: Repeated Period-to-Period Variation Bn Bn+m Applied BDIFF TWINDOW Bn Bn+m Applied BDIFF TWINDOW

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Figure 6: Definition of Differential Magnetic Input 0 G BDIFF(max) BDIFF(min) Time Applied BDIFF BDIFF BDIFF(pk-pk) BDIFF(BRP) BDIFF(BOP) BDIFF(pk-pk) BDIFF(pk-pk) BDIFF(SP) BDIFF(SP) BDIFF(SP)B=DIFF(SP-SEP) (B )OP (B )RP TCYCLE Channel A Channel B SN NS S N Figure 7: Definition of Switch Point Separation

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com FUNCTIONAL DESCRIPTION The A19303 sensor IC contains a single-chip Hall-effect circuit that supports three Hall elements. These elements are used in differential pairs to provide electrical signals containing informa- tion regarding edge position and direction of target rotation. The A19303 is intended for use with ring magnet targets, or, when back-biased with an appropriate magnet, with ferromagnetic targets. The IC detects the peaks of the magnetic signals and sets dynamic thresholds based on these detected signals. Output events are triggered when BDIFF transitions through the switch points. FORWARD ROTATION For the –Fxxx 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 indicated on the output by bits GDR and DR in the generated AK word. For the –Rxxx variant, forward direction is indicated for target rotation from pin 2 to 1 (refer to Figure 8). REVERSE ROTATION For the –Fxxx 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 indicated on the output by bits GDR and DR in the generated AK word. For the –Rxxx variant, reverse direction is indicated for target rotation from pin 1 to 2. AK PROTOCOL DESCRIPTION When a target passes in front of the device (opposite the branded face of the package case), the A19303 generates an AK word for each magnetic pole or for each tooth and each valley of the target. Speed information is provided by the output pulse rate, while direction of target rotation is provided in the AK data bits. PW PROTOCOL DESCRIPTION When a target passes in front of the device (opposite the branded face of the package case), the A19303 generates an output pulse for each magnetic pole or for each tooth and each valley of the target. Speed information is provided by the output pulse rate, while direction of target rotation is provided by the duration of the output pulses. Figure 8: Target Orientation Relative to Device (ring magnet shown). N N NN N S S S SS N N NN N S S S SS (A) Forward Rotation (-F variant) (B) Reverse Rotation (-F variant) Branded Face of Sensor Branded Face of Sensor Pin 1 Pin 2 Pin 1 Pin 2 Rotating Target Rotating Target Figure 9: Output Timing Example

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com AK BIT DEFINITIONS The AK protocol (-xAxx variant) consists of 10 pulses. A single speed pulse, 8 data bits, and a single parity bit. The speed pulse and data bit definitions are described below. Field Abbreviation Coding Speed Pulse SP ICC(HIGH) if speed pulse, ICC(MID) if standstill pulse Bit Number Field Abbreviation Coding Post-Power-On Default Value

0 Air Gap Reserve LR 1 if Gpkpk < BLR(pk-pk), 0 otherwise 0

1 Status Mode M 1 if not in running mode, 0 otherwise 1

2 Unused N/A 0 always 0

3 Validity of the Direction of Rotation GDR 1 if direction is valid, 0 otherwise 0

4 Direction DR 0 if forward rotation, 1 if reverse rotation 0

5 Air Gap Indication LM0 LM LSB 0

6 Air Gap Indication LM1 LM 0

7 Air Gap Indication LM2 LM MSB 0

8 Parity P 1 if parity incl. parity bit is even, 0 otherwise 1 LM AIR GAP TABLE Data bits [5:7] report the air gap indication. These bits give 8 air gap ranges in respect to the measured peak to peak magnetic field (BDIFF(pk-pk)). LM2 LM1 LM0 Threshold Value (Typ.) Units 0 0 0 ≤ 12 G 0 0 1 > 12 G 0 1 0 > 18 G 0 1 1 > 24 G 1 0 0 > 36 G 1 0 1 > 54 G 1 1 0 > 78 G 1 1 1 > 111 G

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com BOP BOP BRP BRP Device Orientation to Target Package Case Branded Face Target Magnetic Profile Mechanical Position (Target moves past device pin 1 to pin 2) Target (Radial Ring Magnet) IC Internal Differential Analog Signals, BDIFF Detected Channel Switching Output Events (Pin 2 Side) (Pin 1 Side) (Top View of Package Case)IC This pole sensed later This pole sensed earlier NSS Channel A Channel A Channel B Channel B Package Case Branded Face (Pin 2 Side) (Pin 1 Side) (Top View of Package Case) Back-Biasing Magnet This tooth sensed earlier This tooth sensed later Device Orientation to Target Mechanical Position (Target moves past device pin 1 to pin 2) Target (Gear) Target Magnetic Profile IC South Pole North Pole BOP BOP BRP BRP IC Internal Differential Analog Signals, BDIFF Detected Channel Switching Output Events Channel A Channel A Channel B Channel B Figure 10: Basic Operation Channel A or Channel B can be used as the output switching channel. This is determined on startup by the first channel that switches. The non-switching channel is used for direction detection.

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Calibration and Direction Validation When power is applied to the A19303, 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. Once the calibration routine is complete, the A19303 will transmit accurate speed and direction information. Target Rotation N Target Magnetic Differential Profile t Opposite North Pole Opposite South Pole Opposite N→S Boundary Opposite S→N Boundary Device Location at Power-On NNSS S Figure 11: Calibration Behavior

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Direction Changes, Vibrations, and Anomalous Events During normal operation, the A19303 will be exposed to changes in the direction of target rotation (Figure 12), vibrations of the target (Figure 13), and anomalous events such as sudden air gap changes. During calibration, output pulses with direction information are immediately transmitted to the output. Depending on target design, air gap, and the phase of the target, direction may be momentarily incorrect. Following a direction change in running mode, direction changes are immediately transmitted to the output. NormalT arget Rotation NormalT arget Rotation S S SNN S SN NN Target Differential Magnetic Profile Vibration Figure 12: Direction Change Behavior (-xxHx variant) Figure 13: Vibration Behavior (-xxHx variant) N S N S N S N NS Forward Rotaon Reverse Rotaon Direcon Change Target Differenal Magnec Profile ICC

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com The device must be operated below the maximum junction tem- perature 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.) 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. The effect of varying power levels (Power Dissipation or PD), can be estimated. The following formulas represent the fundamental relationships used to estimate TJ, at PD. PD = VIN × IIN (1) ΔT = PD × RθJA (2) T J = TA + ΔT (3) For example, given common conditions such as: TA= 25°C, VCC = 12 V, ICC = 7.15 mA, and RθJA = 213°C/W, then: PD = VCC × ICC = 12 V × 7.15 mA = 85.8 mW ΔT = PD × RθJA = 85.8 mW × 213°C/W = 18.3°C 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, package UB, using minimum-K PCB. Observe the worst-case ratings for the device, specifically: RθJA = 213°C/W, TJ(max) = 165°C, VCC(max) = 24 V , and ICC(A VG) = 16.6 mA. ICC(A VG) is computed using ICC(HIGH)(max), ICC(MID)(max), and ICC(LOW)(max), with an input signal frequency of fSIG(max) (AK protocol). Calculate the maximum allowable power level (PD(max) ). First, invert equation 3: ΔTmax = 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) = ΔTmax ÷ RθJA = 15°C ÷ 213°C/W = 70.4 mW Finally, invert equation 1 with respect to voltage: VCC(est) = PD(max) ÷ ICC(AVG) = 70.4 mW ÷ 16.6 mA = 4.2 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 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. POWER DERATING

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Figure 14: Package UB, 2-Pin SIP For Reference Only –N ot for Tooling Use (Reference DWG-0000408, Rev. 4) Dimensions in millimeters – NOT TO SCALE Exact case and lead configuration at supplier discretion within limits shown 0.65 ±0.07 7° ×2 R0.20 (all edges) 4.00 +0.06 –0.05 10° ×4 1.50 ±0.05 Active Area Depth 0.38 ±0.03 4.00 +0.06 –0.07 Package Front and Rear Surface Finish Ra 0.4 to 0.56 (Charmilles 12 to 15) 18.00 ±0.10 45° 0.42 ±0.05 R0.20 (all corners)

0.30 REF

2.54 REF

1.80 ±0.10 1.00 ±0.05 0.25 +0.07 –0.03 Plating Included R0.12 (all edges) 1.50 ±0.05

0.38 REF

0.85 ±0.05 /uni23001.00 REF ×2 Ejector Pin R0.30 (all corners)

0.25 REF

3.35 ±0.10

7.37 REF ×4

/uni23002.00 REF Ejector Pin 0.10 +0.05 –0.10 DETAIL A

0.545 REF ×2

1.36 REF 0.15 REF

0.25 REF ×4

2.50 ±0.10 ×4 12.20 ±0.10

0.85 REF ×8

1.80 +0.06 –0.07 4.00 +0.06 –0.05 DETAIL A Branding scale and appearance at supplier discretion Standard Branding Reference View Date Code Lot Number 9303A Molded Lead Bar for preventing damage to leads during shipment Gate and tie burr area Dambar Protrusion Removal ×8 1.10 1.10 0.90 1.39 Hall Element E1 (not to scale) Hall Element E2 (not to scale) Hall Element E3 (not to scale) PACKAGE OUTLINE DRAWING

Vibration-Tolerant High-Accuracy Hall-Effect Wheel Speed and Direction Sensor ICA19303 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com

Revision History

– March 9, 2023 Initial release For the latest version of this document, visit our website: www.allegromicro.com Copyright 2023, Allegro MicroSystems. Allegro MicroSystems 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 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.