A19360LUBATN-FAR4

A19360 ALLEGRO

Document overview

• Manufacturer or author: Provided By www.digicamel.com(free datasheet download site)
• PDF pages: 18

Technical content

A19360-DS, Rev. 4 MCO-0001160

• High-resolution measurement for enhanced ADAS accuracy, such as for automated parking
• GMR technology delivers high magnetic sensitivity for large air gaps and low-jitter switching
• SolidSpeed Digital Architecture provides robust, adaptive performance for high output accuracy and full- pitch vibration immunity
• Integrated solution includes the IC and a protection capacitor in a single overmolded package
• ISO 26262 ASIL B(D) with integrated diagnostics and certified safety design process (pending assessment) High-Resolution GMR Wheel Speed and Distance Sensor IC A19360 The A19360 is a magnetic sensor integrated circuit (IC) that uses giant magnetoresistance (GMR) technology to encode the speed and direction of rotating ring magnets. Innovative algorithms generate additional events per magnetic cycle while staying robust to air-gap variation, to provide high-resolution rotational data that can be used for accurate distance measurement. The A19360 is compatible with standard ring magnets used in automotive braking systems, and Allegro programs each IC according to the characteristics of the magnet used. The A19360 is available in two resolution options (4 or 8 events per cycle) and two protocol options (pulse width or AK protocol). The four-event AK protocol option uses 28 mA speed pulses for every event and operates continuously throughout the full frequency range using standard bit truncation at higher speeds. The eight-event AK protocol option uses 14 mA speed pulses for high-resolution events and features an automatic crossover to standard resolution at higher speeds, maximizing the available bandwidth of the two-wire interface. The A19360 was developed in accordance with ISO 26262 as a hardware safety element out of context, rated ASIL B(D) (pending assessment) for use in automotive safety-related systems when integrated and used in the manner prescribed in the applicable safety manual and datasheet. The A19360 is provided in a two-pin SIP package (suffix UB) that is lead (Pb) free, with tin lead frame plating. The UB package includes an IC and protection capacitor integrated into a single overmolded package, with an additional molded lead-stabilizing bar for robust shipping and ease of assembly. PACKAGE: Not to scale FEATURES AND BENEFITS DESCRIPTION 2-Pin SIP (suffix UB) April 25, 2024 Figure 1: Functional Block Diagram VCC GMR Elements Front-End Amplifiers Bias Control Bias Control Current SourceDiagnostics EEPROM Digital Controller GND ESD, EMC Voltage Regulators Voltage Regulators ADC ADC

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A. www.allegromicro.com SELECTION GUIDE* Part Number Packing A19360LUBATN-FAE4-065-A Tape and Reel, 4000 pieces per reel * Not all combinations are available. For availability and pricing of custom programming options, contact Allegro sales. Instructions (Packing) Package Designation Operating Temperature Range Allegro Identifier and Device Type Forward Rotation Direction: Undervoltage Lockout Hysteresis Output Protocol Selection Resolution Mode 4 – 4 events per pole-pair 8 – 8 events per pole-pair -030 to 150 – Target Trim R – Reduced Hysteresis E – Extended Hysteresis Fault Detection Mode UBAA19360 TNL Target Trim (see Phase Separation Calculation section) -A – ASIL Protocol Enabled [Blank] – ASIL Protocol Disabled A – AK Protocol P – Pulse Width Protocol F – Pin 1 to Pin 2 R – Pin 2 to Pin 1 Complete Part Number Format

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com SPECIFICATIONS 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) 175 °C Storage Temperature Tstg –65 to 170 °C Applied Magnetic Flux Density B In any direction 500 G INTERNAL DISCRETE CAPACITOR RATINGS Characteristic Symbol Test Conditions Value Unit Nominal Capacitance CSUPPLY Connected between pin 1 and pin 2 (refer to Figure 3) 2.2 nF PINOUT DIAGRAM AND LIST Figure 2: Package UB, Two-Pin SIP Pinout Diagram Table 1: Pinout List Pin Name Pin Number Function VCC 1 Supply Voltage GND 2 Ground Package CSUPPLY VCC VOUT = ICC × RL CL RL Silicon Figure 3: Typical Application Circuit

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Continued on the next page… OPERATING CHARACTERISTICS: Valid throughout full operating voltage and temperature ranges, unless otherwise specified Characteristic Symbol Test Conditions Min. Typ. [1] Max. Unit

ELECTRICAL CHARACTERISTICS

Supply Voltage [2] VCC Potential between pin 1 and pin 2 -xxRx variant [3] 4.25 – 24 V -xxEx variant 5.2 – 24 V Undervoltage Lockout (UVLO) VCC(OFF) VCC switch off – – 3.5 V UVLO Hysteresis VHYS -xxRx variant 0.5 – – V -xxEx variant 1.5 – – V Reverse Supply Current [4] IRCC VCC = VRCC(MAX) –10 – – mA Supply Zener Clamp Voltage VZsupply ICC = ICC(MAX) + 3 mA 28 – – V Supply Current ICC(LOW) Low-current state 5.88 7 8.4 mA ICC(MID) Mid-current state 11.76 14 16.8 mA ICC(HIGH) High-current state 23.52 28 33.6 mA Supply Current Ratio [5] ICC(MID) /ICC(LOW) (isothermal) 1.9 – – – ICC(HIGH) /ICC(LOW) (isothermal) 3.8 – – – Fault Current IFAULT Refer to the figure in the Output Protocol in Fault Condition section 1 – 3.8 mA Fault Current Duration tW(FAULT) Refer to the figure in the Output Protocol in Fault Condition section 4 – 7 ms Output Rise, Fall Slew Rate SR RL = 50 Ω, CL = 10 pF, measured between 10% and 90% of signal 8 – 28 mA/μs POWER-ON CHARACTERISTICS Power-On State POS VCC > VCC(min), as connected in Figure 3 ICC(LOW) mA Power-On Time[6] tPO VCC > VCC(min), as connected in Figure 3 – – 1 ms Calibration Time TCAL Post tPO time to first AK protocol output event (f < 200 Hz) -xAx8 variant – 0.75 1.25 TCYCLE -xAx4 variant – 1 1.5 TCYCLE Post tPO time to first valid direction event (f < 200 Hz) -xxx8 variant – 0.75 1.25 TCYCLE -xxx4 variant – 1 1.5 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; see representative Power Derating section. [3] Part switching may cause the part to re-enter UVLO when this option is used with the AK protocol and a 50 Ω load. [4] Negative current is defined as conventional current coming out of (sourced from) the specified device terminal. [5] Supply current ratios are taken as the mean value of ICC(MID) / ICC(LOW) and the mean value of ICC(HIGH) / ICC(LOW), respectively. [6] Time between power-on to ICC stabilizing; output transients prior to tPO should be ignored.

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com 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 Single-Ended Magnetic Input Signal [7] BSE Combined single-element signal and offset must fall within this range. –100 – 100 G Operating Differential Magnetic Input Signal [7] BDIFF(pk-pk) Peak-to-peak of differential magnetic input (refer to Figure 7) 5 – 400 G Allowable User-Induced Differential Offset BDIFFEXT External differential signal bias (DC), operating within specification –20 – 20 G Operating Magnetic Input Signal Variation ΔBDIFF(pk-pk) Bounded amplitude ratio within TWINDOW [8]; no missed output transitions or flat-line condition; possible incorrect direction data; see Figure 5 and Figure 6 0.6 – – – Operating Magnetic Input Signal Window TWINDOW Rolling window where ΔBDIFF(pk-pk) cannot exceed bounded ratio; see Figure 5 and Figure 6 5 – – TCYCLE Operate Point BOP % of peak-to-peak IC-processed signal – 60 – % Release Point BRP % of peak-to-peak IC-processed signal – 40 – % Repeatability [9] ErrθE Constant air gap, temperature, and target speed. BDIFF(pk-pk) > 20 G(pk-pk). Primary pulses, percent of a TCYCLE one sigma – – 0.05 % Constant air gap, temperature, and target speed. BDIFF(pk-pk) > 20 G(pk-pk). High-resolution pulses, one sigma – – 0.085 % Phase Separation ΦP For calculations, refer to the Phase Separation Calculation section 30 – 150 degrees OUTPUT CHARACTERISTICS (-XPX8 VARIANT) Pulse-Width Off Time tW(PRE) Enforced signal-low duration 25 30 36 μs Forward Pulse Width tW(FWD) Magnetic input frequency < fL,PW 38 45 52 μs Reverse Pulse Width tW(REV) Magnetic input frequency < fL,PW 76 90 104 μs High-Speed Pulse Width tW(HS) Magnetic input frequency > fH,PW 25 30 36 μs Standstill Pulse Width tW(STILL) 1232 1440 1656 μs Standstill Period tSTOP 590 737 848 ms Low-to-High Speed Threshold fH,PW Frequency at which device transitions to high- speed operation (increasing frequency) 850 1000 1150 Hz High-to-Low Speed Threshold fL,PW Frequency at which device transitions to low- speed operation (decreasing frequency) 800 950 1100 Hz Speed Threshold Hysteresis fHYS,PW – 50 – Hz Operating Frequency, High-Speed Pulses [10] fHS 0 – 4 kHz [7] Differential magnetic field measured for Channel A (E1 – E3) and Channel B (E2 – E4). The differential magnetic field of each channel is measured between two GMR elements spaced by 1.5 mm. Magnetic field is measured in the By direction and the |Bx| field must be less than 80 G (refer to Figure 8). [8] 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. [9] Greater than 1000 output edges captured. Repeatability (i.e., jitter) is tested to 1 sigma and guaranteed by design and characterization only. [10] Frequency is based on BDIFF frequency. Continued on the next page…

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com OPERATING CHARACTERISTICS (continued): Valid throughout full operating voltage and temperature ranges, unless otherwise specified [11] Ring magnet decreases in magnetic strength with rising temperature, and the device compensates. Note that the BDIFF(pk-pk) requirement is not influenced by this. Characteristic Symbol Test Conditions Min. Typ. [1] Max. Unit OUTPUT CHARACTERISTICS (-XPX4 VARIANT) Pulse-Width Off Time tW(PRE) Enforced signal-low duration 25 30 36 μs Forward Pulse Width tW(FWD) 38 45 52 μs Reverse Pulse Width tW(REV) 76 90 104 μs Standstill Pulse Width tW(STILL) 1232 1440 1656 μs Standstill Period tSTOP 590 737 848 ms Operating Frequency, Forward Pulses [10] fFWD 0 – 3.3 kHz Operating Frequency, Reverse Pulses [10] fREV 0 – 2.2 kHz OUTPUT CHARACTERISTICS (-XAX8 VARIANT) Bit Width tp 40 50 60 μs Standstill Period tSTOP 105 150 195 ms Post-Standstill Suppression Delay tPSSD High-resolution pulse delay when truncating a standstill pulse 300 400 – μs Pulse-Width Off Time tW(PRE) – 75 – μs Low-to-High Speed Threshold fH,AK Frequency at which device transitions to high- speed operation (increasing frequency) 170 200 230 Hz High-to-Low Speed Threshold fL,AK Frequency at which device transitions to low- speed operation (decreasing frequency) 160 190 220 Hz Speed Threshold Hysteresis fHYS,AK – 10 – Hz Air-Gap Reserve Level BLR Signal amplitude that engages AK LR bit – 5 – G Operating Frequency [10] fSIG 0 – 4 kHz OUTPUT CHARACTERISTICS (-XAX4 VARIANT) Bit Width tp 40 50 60 μs Standstill Period tSTOP 105 150 195 ms Pulse-Width Off Time tW(PRE) – 75 – μs Air-Gap Reserve Level BLR Signal amplitude that engages AK LR bit – 5 – G Operating Frequency [10] fSIG 0 – 2.5 kHz THERMAL CHARACTERISTICS Magnetic Temperature Coefficient [11] TC Based on ferrite – 0.2 – % / °C Package Thermal Resistance RθJA Single-layer PCB with copper limited to solder pads – 213 – °C/W PERFORMANCE CHARACTERISTICS Vibration Detection NVIB_CHANGE Number of direction changes until vibration is detected – 4 – – Vibration Release TVIB_CONST Number of consecutive constant- direction pulses to release vibration count and suppression -xxx8 variant – 8 – – -xxx4 variant – 4 – –

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 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 north pole and one south pole across the sensor Figure 4: Definition of TCYCLE Figure 5: Input Signal Definition 0 G BDIFF(max) BDIFF(min) Time Applied BDIFF BDIFF BDIFF(pk-pk) BDIFFEXT Figure 6: Single Period-to-Period Variation Bn Bn + m TWINDOW Applied BDIFF ΔB DIFF(pk–pk) = , m = 1,2,…,TWINDOW Bn+m Bn Figure 7: Repeated Period-to-Period Variation Bn Bn + m TWINDOW Applied BDIFF ΔBDIFF(pk–pk) = , m = 1,2,…,T WINDOW Bn+m Bn OPERATING CHARACTERISTICS (continued): Valid throughout full operating voltage and temperature ranges, unless otherwise specified

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com FUNCTIONAL DESCRIPTION Figure 8: Package Orientation Bx Bz By Pin 1 Figure 9: Sensing Orientation Rotation Pin 1 The A19360 sensor IC contains a single-chip GMR circuit that uses spaced elements. These elements are used in differential pairs to provide electrical signals containing data regarding edge posi- tion and direction of rotation. The A19360 is intended for use with ring-magnet targets, as shown in Figure 9. The IC detects the peaks of the magnetic signals and sets dynamic thresholds based on these detected signals. The A19360 is compatible with a wide range of ring-magnet tar- gets, according to the supported phase-separation range. For each target and air gap, the channel-to-channel phase separation can be calculated using: 360 2ФP = × 1.085 mm × NPP rtarget + dAG where ΦP is the channel-to-channel phase separation, NPP is the number of pole-pairs the target has, rtarget is the target radius in mm, and dAG is the nominal air gap for radial sensed targets in mm or unused for axial sensed targets. Each A19360 is trimmed to a specific target encoder, which is indicated by the “Target Trim” in the selection guide. Correct trimming is required for accurate output data and performance, including output event phase accuracy, direction detection, and vibration detection. Phase-Separation Calculation

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com BOP BRP BOP Device Orientation to Target ICE4 E2 E1 (Pin 1 Side)(Pin 2 Side) Package Case Branded Face Target Magnetic Profile Mechanical Position (Target moves past device pin 1 to pin 2) S NN Target (Radial Ring Magnet) This pole sensed earlier This pole sensed later (Top View of Package Case) Channel Element Pitch Channel A Channel A Channel B Element Pitch Channel A Element Pitch Primary High-Res N IC Internal Differential Analog Signals, BDIFF Detected Channel Switching Output Events (-xxx8 Variant) Primary High-Res Output Events (-xxx4 Variant) PI=1 DR=1 Pulse Width Protocol AK Protocol PI=0 DR=1 PI=0 DR=1 PI=0 DR=1 PI=0 DR=1 PI=1 DR=1 ICC(HIGH) ICC(MID) ICC(LOW) ICC(HIGH) ICC(MID) ICC(LOW) Primary High-Res Output Events (-xxx8 Variant) tw = 45 µstw = 45 µstw = 45 µstw = 45 µstw = 45 µstw = 45 µs PI=1 DR=1 Pulse Width Protocol AK Protocol PI=0 DR=1 PI=1 DR=1 ICC(HIGH) ICC(MID) ICC(LOW) ICC(HIGH) ICC(MID) ICC(LOW) Primary High-Res Output Events (-xxx4 Variant) tw = 45 µs tw = 45 µs tw = 45 µs SN N Figure 10: Basic Operation

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Figure 11: Target Orientation Relative to Device 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 The -xxx4 variant generates four output words—two primary words and two high-resolution words—for each magnetic pole-pair of the target. This variant outputs four output words for all operating frequencies. Both primary and high-resolution words are generated with a speed pulse current of ICC(HIGH). For further information, refer to Description of AK Protocol. Figure 12: Output Events Variant -xxx8: Low Speed Primary High-Res S NN S S NN S S NN S Variant -xxx8: High Speed Variant -xxx4: All Speeds Primary High-Res Primary High-Res 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. For the -Rxxx variant, forward rotation is indicated when a target feature passes from pin 2 to 1. Pulse Width Protocol Forward 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. For the -Rxxx variant, reverse rotation is indicated when a target feature passes from pin 1 to 2. Reverse Rotation When a target passes in front of the device (opposite the branded face of the package), the A19360 generates output words that are triggered by BDIFF transitions through equidistant switch points. On a switch-point crossing, the speed pulse and relevant data are generated and transmitted. The IC is capable of properly detecting input signals up to the defined operating frequency. Speed data are provided by the speed pulse rate, and other data are directly com- municated via the AK bits. The -xxx8 variant generates eight output words—two primary words and six high-resolution words—for each magnetic pole- pair of the target when it is rotating at low speeds below the fL,AK threshold. At higher rotating speeds above the fH,AK threshold, this variant automatically switches to standard resolution and only out- puts two primary words per pole-pair. Primary words are generated with a speed pulse current of ICC(HIGH) while high-resolution words are generated with a speed pulse current of ICC(MID). AK Protocol When a target passes in front of the device (opposite the branded face of the package), the A19360 generates output pulses that are triggered by BDIFF transitions through equidistant switch points. On a switch-point crossing, the corresponding direction pulse is generated and transmitted. Speed data are provided by the speed pulse rate, and the direction of the target rotation data is provided by the pulse width. The -xxx8 variant generates eight output pulses—two primary pulses and six high-resolution pulses—for each magnetic pole-pair of the target when it is rotating at low speed below the fL,PW thresh- old. At higher rotating speed above the fH,PW threshold, this variant automatically switches to standard resolution and only outputs two primary pulses per pole-pair. Primary pulses are generated with a pulse current of ICC(HIGH) while high-resolution pulses are gener- ated with a pulse current of ICC(MID). The -xxx4 variant generates four output pulses—two primary pulses and two high-resolution pulses—for each magnetic pole-pair of the target. This variant outputs four output pulses for all operating frequencies. Both primary and high-resolution pulses are generated with a speed pulse current of ICC(MID).

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com The -xAx8 variant of the A19360 outputs air-gap indication (LM) data on bits [5:7] if the generated pulse is a primary pulse. If the generated pulse is a high-resolution (HR) pulse, bits [5:7] report which HR pulse generated the output event. The -xAx4 variant of the A19360 outputs air-gap indication (LM) data on bits [5:7] on all generated pulses. HR data are unused. The A19360 fulfills requirements according to the AK Protocol specification “Requirement Specification for Standardized Inter- face for Wheel Speed Sensors with Additional Information ‘AK- Protokoll’” version 4.0, with some modifications, as discussed in the sections that follow. Description of AK Protocol The AK word consists of 10 pulses—a single speed pulse, 8 data bits, and a single parity bit. The speed pulse and data bit defini- tions are described in Table 2. AK Bit Definitions LM/HR Data Bits Decoding Bit Number Field Abbr. Coding Post-Power- On Default Value – Speed Pulse SP ICC(HIGH) if primary or high-resolution pulse, ICC(MID) if standstill pulse (-xAx4 variant) – ICC(HIGH) if primary pulse, ICC(MID) if high-resolution or standstill pulse (-xAx8 variant ) –

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

1 Status Mode M 1 if running mode is not active, 0 otherwise 1

2 Primary Indication PI 1 if primary or standstill pulse, 0 if high-resolution pulse 1

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

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

5 Air Gap Indication or High-Resolution Pulse (LSB) LM0/HR0 LM/HR LSB 0

6 Air Gap Indication or High-Resolution Pulse LM1/HR1 LM/HR 0

7 Air Gap Indication of High-Resolution Pulse (MSB) LM2/HR2 LM/HR MSB 0

8 Parity P 1 if parity incl. parity bit is even, 0 otherwise 0 Table 2: Speed Pulse and Data Bit Definitions Figure 13: Speed Pulse and Data Bits 0 1 2 3 4 5 6 7 8 Speed Pulse Data Bits ICC(LOW) ICC(MID) ICC(HIGH)

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Figure 14: ICC(MID) Pulse-Truncating Standstill Pulse Ex- ample, -xAx8 Variant Standstill Request High- Resolution Request tPSSD ICC(MID) ICC(Low) Figure 15: ICC(HIGH) Pulse-Truncating Standstill Pulse Example Standstill Request Primary Request ICC(MID) ICC(LOW) ICC(HIGH) If no pulses are output for tSTOP, in the -xAxx variant of the A19360, a standstill pulse is generated. The standstill event is always generated with an ICC(MID) speed pulse. For the -xAx8 variant, where high-resolution pulses are also generated with an ICC(MID) pulse, the A19360 delays the high-resolution pulse by tPSSD if a high-resolution pulse truncates a standstill pulse. Data bits [5:7] report the air-gap indication. These bits give eight air-gap ranges with respect to the measured peak-to-peak mag- netic field, BDIFF(pk-pk). LM Air Gap Table Standstill Table 3: Data Bits [5:7]—Air Gap Indications LM2 LM1 LM0 BDIFF(pk-pk) Range (Typ.) 0 0 0 < 5.6 G 0 0 1 5.6 to 11 G 0 1 0 11 to 22 G 0 1 1 22 to 45 G 1 0 0 45 to 90 G 1 0 1 90 to 180 G 1 1 0 180 to 360 G 1 1 1 > 360 G Data bits [5:7] report which HR pulse was generated. These bits allow for up to eight unique pulse labels, so each HR pulse has a unique label. HR2 HR1 HR0 Description 0 0 0 Unused 0 0 1 HR pulse 1 0 1 0 HR pulse 2 0 1 1 HR pulse 3 1 0 0 Unused 1 0 1 HR pulse 4 1 1 0 HR pulse 5 1 1 1 HR pulse 6 Table 4: Data Bits [5:7]—HR Pulses

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com NOTE: If a fault exists continuously, the device output remains at the IFAULT level. For additional details, refer to the A19360 Safety Manual. ICC(HIGH) ICC(MID) ICC(LOW) IFAULT tW(FAULT) Error tCAL ICC(HIGH) ICC(MID) ICC(LOW) IFAULT tW(FAULT) Error tCAL S N NN Primary High-Res Output Events (Typical Operation) Magnetic Encoder Fault Protocol (AK) Fault Protocol (PW) Figure 16: Output Protocols in Fault Condition The A19360 sensor IC contains diagnostic circuitry that con- tinuously monitors occurrences of failure defects within the IC. For the output protocol after a fault has been detected, refer to Figure 16. Output Protocol in Fault Condition

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Figure 17: Calibration Behavior S N S NS NS N t Target Rotaon Device Locaon at Power-On Opposite north pole Opposite N S boundary Opposite south pole Opposite S N boundary Primary High-Res Target Differential Magnetic Profile Output Events N rotation. Once the calibration routine is complete, the A19360 transmits accurate speed and direction data via the selected output protocol. When power is applied to the A19360, 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 Calibration and Direction Validation

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com N S N S N S N NS Primary High-Res Target Differential Magnetic Profile Output Events Forward Rotation Direct Change Reverse Rotation Figure 18: Direction Change Behavior Constant Target Rotation Constant Target Rotation S N Primary High-Res N Target Differential Magnetic Profile Vibration NS NN SS Output Events Figure 19: Vibration Behavior During a vibration event, the last reported direction before blanking begins depends on the magnetic angle where vibration began. As the -xxx4 variant detects vibration at a higher resolution than output events, vibration may be entered after consecutive direction events are outputted. During operation, the A19360 is exposed to changes in the direction of target rotation (Figure 18), vibrations of the target (Figure 19), and anomalous events such as sudden air-gap changes. The A19360 has built-in vibration algorithms that detect and blank pulses if the directional changes of NVIB_CHANGE occur without the TVIB_CONST consecutive constant direction pulses between each direction change. Vibration detection exits when TVIB_CONST consecutive direction events occur. Direction Changes, Vibrations, and Anomalous Events

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com 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.) 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. Radia- tion 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, PD) can be estimated. The following formulas represent the fundamental relationships used to estimate TJ, at PD. P D = 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 TJ = TA + ΔT = 25 °C + 18.3 °C = 43.3 °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. Observe the worst-case ratings for the device, specifically: RθJA = 213 °C/W (subject to change), TJ(max) = 175 °C, VCC(max) = 24 V , and ICC(A VG) = 21 mA. ICC(A VG) is computed using ICC(HIGH)(max) and ICC(LOW)(max), with a duty cycle of 50% computed from fsig(max) for the -xAx4 variant. To calculate the maximum allowable power level, PD(max), first rearrange Equation 3: ΔTmax = TJ(max) – TA = 175 °C – 150 °C = 25 °C This provides the allowable increase to TJ resulting from internal power dissipation. Then, rearrange Equation 2: PD(max) = ΔTmax ÷ RθJA = 25 °C ÷ 213 °C/W = 117.4 mW Finally, solve Equation 1 with respect to voltage: VCC(est) = PD(max) ÷ ICC(max) = 117.4 mW ÷ 21 mA = 5.6 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. 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800 1900 20 40 60 80 100 120 140 160 180 Temperature (°C) Power Dissipation, PD (mW) (RθJA = 213ºC/W) 1-layer PCB, Package UB 20 40 60 80 100 120 140 160 180 Temperature (ºC) Maximum Allowable VCC (V) VCC(min) VCC(max) (RθJA = 213ºC/W) 1-layer PCB, Package UB Figure 20: Power Derating Curve Figure 21: Power Dissipation versus Ambient Temperature

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Figure 22: Package UB, 2-Pin SIP PACKAGE OUTLINE DRAWING 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 Molded Lead Bar for preventing damage to leads during shipment Gate and tie burr area Dambar Protrusion Removal ×8 1.085 1.41 GMR Element E2 (not to scale) GMR Element E3 (not to scale) Line 1 = Part Number (5 characters) Line 2 = Date Code (4 digits) Line 3 = Characters 5-8 of Assembly Lot Number Branding scale and appearance at supplier discretion Standard Branding Reference View Date Code Lot Number 9360A GMR Element E4 (not to scale) GMR Element E1 (not to scale) 1.085 0.415

High-Resolution GMR Wheel Speed and Distance Sensor ICA19360 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com

Revision History

– November 29, 2021 Initial release

1 August 16, 2022 Updated Fault Current Duration symbol (page 4)

2 December 6, 2022 Updated Selection Guide table and Part Numbering Schematic (page 2); updated Phase Separation Calculation section (page 8)

3 January 26, 2024

Updated per revised technical style guidelines: changed future tense to present tense, removed or changed “normal” to “typical” or “constant,” minimized use of capitalization, added hyperlinks to internal cross-references, and made minor editorial changes throughout (all pages)

4 April 25, 2024 Updated package drawing (page 17)

Copyright 2024, 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. For the latest version of this document, visit our website: www.allegromicro.com