A19300 ALLEGRO
Document overview
- Manufacturer or author: Provided By www.digicamel.com(free datasheet download site)
- PDF pages: 17
Technical content
The A19300 is an optimized Hall-effect integrated circuit (IC) 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 detection and rotational direction detection ideal for ABS applications. Integrated diagnostics are used to detect an IC failure impacting output protocol accuracy, providing ASIL B compliance. 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. A19300-DS, Rev. 2 MCO-0000535
- Hall-effect technology allows ease of use for ring magnet and ferrous target sensing
- 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
- ASIL B rating based on integrated diagnostics and certified safety design process
- User-accessible EEPROM for device traceability ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction Output Functional Block Diagram A19300 Oscillator EEPROM Digital Controller L-C Output ESD Protection Regulator VCC ADC ADC C-R VCC GND Output Driver FEATURES AND BENEFITS DESCRIPTION September 26, 2022 PACKAGE: Not to scale 2-Pin SIP (suffix UB)
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A. www.allegromicro.com SELECTION GUIDE* Part Number Packing A19300LUBATN-FWPE-A Tape and reel, 4000 pieces per reel A19300LUBATN-RWPE-A Tape and reel, 4000 pieces per reel A19300LUBATN-FWPE Tape and reel, 4000 pieces per reel A19300LUBATN-RWPE Tape and reel, 4000 pieces per reel *Not all combinations are available. Contact Allegro sales for availability and pricing of custom programming options. Configuration Options A19300 N– 45 µs W– 90 µs F– Pin 1 to pin 2 R– Pin 2 to pin 1 Forward Rotation Direction: LT N- Packing Instructions Package Designation Operating Temperature Range Allegro Identifier and Device Type Forward Pulse Width: UBA Protocol Options: P– Warning and standstill pulses enabled Magnetic Temperature Compensation: G– Samarium-cobalt magnet Warning and standstill pulses disabled Ferrite ring magnet or neodymium magnetE B Fault Detection Mode: ASIL protocol enabledA ASIL protocol disabled[blank]
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 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 Maximum 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 1) 2.2 nF Figure 1: Typical Application Circuit VCC GND RL CSUPPLYIC VOUT = ICC × RL CL A19300 SPECIFICATIONS
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Terminal List Table Name Number Function VCC 1 Supply Voltage GND 2 Ground PINOUT DIAGRAM AND TERMINAL LIST
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Characteristic Symbol Test Conditions Min. Typ.[1] Max. Unit
ELECTRICAL CHARACTERISTICS
Supply Voltage [2] VCC Potential between pin 1 and pin 2 4 – 24 V Undervoltage Lockout VCC(UV) VCC 0 V → 5 V or 5 V → 0 V – 3.6 3.95 V Reverse Supply Current [3] IRCC VCC = VRCC(max) –10 – – mA Supply Zener Clamp Voltage VZsupply ICC = 11.4 mA, TA = 25°C, potential between pin 1 and pin 2 28 – – V Supply Current ICC(LOW) Low-current state 5.9 7 8.4 mA ICC(HIGH) High-current state 12 14 16 mA Supply Current Ratio [4] ICC(HIGH) / ICC(LOW) Measured as ratio of high current to low current (isothermal) 1.9 – – – ASIL Safety Current IRESET Refer to Figure 10 1.5 3.5 3.9 mA ASIL Safety Current Time tRESET Refer to Figure 10 5 – – ms Output Rise/Fall Time tr, tf Voltage measured at terminal 2 in Figure 1, RL = 100 Ω, CL = 10 pF, measured between 10% and 90% of ICC(LOW) and ICC(HIGH) [5] 0 – 1.5 μs POWER-ON CHARACTERISTICS Power-On State POS VCC > VCC(min), as connected in Figure 1 ICC(LOW) mA Power-On Time [6] tPO VCC > VCC(min), as connected in Figure 1 – 0.25 1 ms OUTPUT PULSE CHARACTERISTICS, PULSE PROTOCOL [6] Pulse Width Off Time tW(PRE) Refer to Figure 8 38 45 52 μs Forward Pulse Width tW(FWD) -xNxx variant 38 45 52 μs -xWxx variant 76 90 104 μs Reverse Pulse Width tW(REV) -xNxx and -xWxx variant 153 180 207 μs Warning Pulse Width tW(WARN) -xxPx variant 38 45 52 μs Standstill Pulse Width tW(STILL) -xxPx variant 1232 1440 1656 μs Standstill Period tSTOP -xxPx variant 590 737 848 ms OPERATING CHARACTERISTICS : Valid throughout full operating and temperature ranges, unless otherwise specified Continued on next page...
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Characteristic Symbol Test Conditions Min. Typ.[1] Max. Unit OPERATING CHARACTERISTICS AND PERFORMANCE Operating Frequency, Forward Pulses [8] fFWD -xNxx variant 0 – 5 kHz -xWxx variant 0 – 3.9 kHz Operating Frequency, Reverse Pulses [8] fREV -xNxx and -xWxx variant 0 – 2.4 kHz Operating Frequency, Warning Pulses fWARN -xxPx variant 0 – 5 kHz Operating Differential Magnetic Input [9] BDIFF(pk-pk) Peak-to-peak of differential magnetic input 20 – – G Operating Differential Magnetic Range [9] BDIFF Refer to Figure 5 –700 – 700 G Air Gap Warning Level BWARN Signal amplitude that engages warning pulses (-xxPx variant) – 24 – G Operating Magnetic Input Signal Variation ∆BDIFF(pk-pk) Bounded amplitude ratio within TWINDOW [10]; no missed output transitions or flat line condition; possible incorrect direction information; see Figure 3 and Figure 4 0.4 – – – Operating Magnetic Input Signal Window TWINDOW Rolling window where ∆BDIFF(pk-pk) cannot exceed bounded ratio; see Figure 3 and Figure 4 4 × TCYCLE – – – Calibration Period TCAL Period between power-on and valid speed and correct direction output (f ≤ 200 Hz) – – 1.5 × TCYCLE Operate Point BOP % of peak-to-peak IC-processed signal – 60 – % Release Point BRP % of peak-to-peak IC-processed signal – 40 – % Switch Point Separation BDIFF(SP-SEP) Required amount of amplitude separated between channels at each BOP and BRP occurrence and channels must be in phase (refer to Figure 6) 20 – – %pk-pk THERMAL CHARACTERISTICS Magnetic Temperature Coefficient [11] TC Based on ferrite ring magnet and neodymium magnet (-xxxE Variant) – 0.16 – %/°C Based on SmCo magnet (-xxxG variant) – 0.04 – %/°C [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 for Power Derating discussions. [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] Output Rise/Fall Time specification is guaranteed by design. [6] Time between power-on to ICC stabilizing. Transitions prior to tPO should be ignored. [7] Pulse width measured at threshold of (ICC(HIGH) + ICC(LOW)) / 2. [8] These frequency ranges are based on valid pulse width generation with each pulse width preceding with a tw(PRE)(MAX). Frequency is based on BDIFF frequency. [9] Differential magnetic field is measured for Channel A (E1-E2) and Channel B (E2-E3) independently. Refer to Figure 5. Each channel’s differential magnetic field is measured between two Hall elements spaced by 1.5 mm. Magnetic field is measured orthogonally to the front of the package. Refer to UB package drawing. [10] 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. [11] Magnetic encoders decrease in magnetic strength with rising temperature. The device temperature coefficient compensates, maintaining the BDIFF(pk-pk) requirement. OPERATING CHARACTERISTICS (continued): Valid throughout full operating and temperature ranges, unless otherwise specified
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Target SNSN TCYCLE TCYCLE BDIFF BDIFF = Differential Input Signal; the differential magnetic = Target Cycle; the amount of rotation that flux sensed by the sensor moves one tooth (or north pole) and one valley (or south pole) across the sensor Figure 2: Definition of TCYCLE Figure 3: Single Period-to-Period Variation Figure 4: Repeated Period-to-Period Variation Bn Bn+m Applied BDIFF TWINDOW Bn Bn+m Applied BDIFF TWINDOW
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Figure 5: Input Signal Definition Signal Offset
0 G Differential
BDIFF(MIN) Time Applied BDIFF BDIFF(MAX) 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 6: Definition of Switch Point Separation
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com THERMAL CHARACTERISTICS Characteristic Symbol Test Conditions* Value Unit Package Thermal Resistance RθJA Single-layer PCB with copper limited to solder pads 213 °C/W *Additional thermal information is available on the Allegro website. 20 40 60 80 100 120 140 160 180 Temperature (ºC) Maximum Allowable V (V) CC VCC(max) VCC(min) Power Derating Curve 20 40 60 80 100 120 140 160 180 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 Temperature (ºC) Power Dissipation P (mW) D Power Dissipation versus Ambient Temperature
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com FUNCTIONAL DESCRIPTION The A19300 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 A19300 is intended for use with ring magnet targets, or, when back-biased with an appropriate magnet, with ferrous targets. The IC detects the peaks of the magnetic signals and sets dynamic thresholds based on these detected signals. Data Protocol Description When a target passes in front of the device (opposite the branded face of the package case), the A19300 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. FORWARD ROTATION For the –F 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 a tW(FWD) pulse width. For the –R variant, forward direction is indicated for target rotation from pin 2 to 1 (refer to Figure 7). REVERSE ROTATION For the –F 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 a tW(REV) pulse width. For the –R variant, reverse direction is indicated for target rotation from pin 1 to 2. Output edges are triggered by BDIFF transitions through the switch points. On a crossing, the output is first set to ICC(LOW) for a duration of tw(PRE), after which the output pulse of ICC(HIGH) is present for tw(FWD), tw(REV), or tw(WARN). The IC is always capa- ble of properly detecting input signals up to the defined operating frequency. The tw(PRE) period is dominant, thus always providing rising output edge, but at high frequencies potentially truncating the ICC(HIGH) duration. Figure 7: 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 8: Output Timing Example SN tw(FWD) tw(FWD) tw(PRE) tw(PRE) ICC(LOW) ICC(HIGH)
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 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 (pulse protocol) (Pin 2 Side) (Pin 1 Side) (Top View of Package Case)IC This pole sensed later This pole sensed earlier NSS Speed Channel Element Pitch 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 Speed Channel Element Pitch 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 (pulse protocol) Channel A Channel A Channel B Channel B Figure 9: 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.
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com ASIL Safe State Output Protocol The A19300 sensor IC contains diagnostic circuitry that will continuously monitor occurrences of failure defects within the IC. Refer to Figure 10 for the output protocol of the ASIL safe state after an internal defect has been detected. Error Protocol will result from faults which cause incorrect signal transmission (i.e., too few or too many output pulses). Note: If a fault exists continuously, the device will stay in perma- nent safe state. Refer to the A19300 Safety Manual for additional details on the ASIL Safe State Output Protocol. N S NMagnec Encoder ICC(HIGH) ICC(LOW) ICC(HIGH) ICC(LOW) S N IRESET tRESET Normal Operaon Error Protocol Error TCAL Figure 10: Output Protocol (ASIL Safe State)
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Calibration and Direction Validation When power is applied to the A19300, 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 A19300 will transmit accurate speed and direction information. Target Rotation SSNN SS NN N to rW(FWD) W(REV)t tW(FWD) tW(FWD) tW(FWD) to rW(FWD) W(REV)t Target Differential Magnetic Profile t Opposite North Pole Opposite South Pole Opposite N→S Boundary Opposite S→N Boundary ICC Device Location at Power-On Figure 11: Calibration Behavior (-xxBx Variant)
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Direction Changes, Vibrations, and Anomalous Events During normal operation, the A19300 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. Depending on target design and the phase of the target, direction may be fleet- ingly incorrect. NormalT arget Rotation NormalT arget Rotation S S SNN S SN NN tW(FWD)tW(FWD) tW(FWD) tW(REV) tW(FWD) [or ]tW(REV) [or ]tW(REV) tW(FWD) W(REV)t Target Differential Magnetic Profile Vibration [or ]tW(REV)[or ]tW(FWD) [or ]tW(REV) or Figure 12: Direction Change Behavior Figure 13: Vibration Behavior N S N S N S N NS tW(FWD) Forward Rotaon Reverse Rotaon Direcon Change Target Differenal Magnec Profile ICC tW(REV)
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 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) = 14.8 mA. ICC(A VG) is computed using ICC(HIGH)(max) and ICC(LOW)(max), with a duty cycle of 84% computed from tw(REV)(max) on-time and tw(PRE)(min) off-time (pulse width proto- col). 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 ÷ 14.8 mA = 4.8 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
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 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 Line 1: 5-character Part Number Line 2: 4-digit Date Code Line 3: Characters 5, 6, 7, 8 of Asembly Lot Number Branding scale and appearance at supplier discretion Standard Branding Reference View Date Code Lot Number 19300 Molded Lead Bar for preventing damage to leads during shipment Gate and tie burr area Dambar Protrusion Removal ×8 Hall element E1 (not to scale) Hall element E3 (not to scale) Hall element E2 (not to scale) 1.50 1.50 0.50 1.39 PACKAGE OUTLINE DRAWING
ASIL-Compliant Hall-Effect Wheel Speed Sensor IC with Speed and Direction OutputA19300 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com
Revision History
– December 17, 2018 Initial release
1 September 30, 2019 Added non-ASIL part options and other minor editorial updates
2 September 26, 2022 Removed “™” from SolidSpeed Digital Architecture (page 1); updated package drawing (page 16) For the latest version of this document, visit our website: www.allegromicro.com Copyright 2022, 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.