ATS16351PSM ALLEGRO | Alldatasheet
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DESCRIPTION
The ATS16351 is a True Power-On State (TPOS) camshaft sensor incorporating a back-biasing magnet, advanced fully synchronous digital IC, and EMC protection circuit all in a single sensing solution. The ATS16351 incorporates a GMR bridge with an optimized custom magnetic circuit that switches in response to magnetic signals induced by a ferromagnetic target. The IC contains a sophisticated digital circuit designed to match the temperature behavior of the sensor IC with the integrated magnet. Signal processing is used to provide zero-speed performance independent of air gap and is designed for the typical operating conditions found in automotive camshaft sensing applications. The resulting output of the device is a digital representation of the ferromagnetic target profile. The Auto-TPOS feature of the ATS16351 enables the sensor IC to learn the installation air gap inside of the engine and to autonomously reprogram into memory the optimal threshold for power-on accuracy. A number of factory-programmable options allow for performance optimization to meet specific application requirements. The ATS16351PSM is available in a 3-pin package (SM) that is lead (Pb) free, with 100% NiPdAu plating. ATS16351PSM-DS, Rev. 2 MCO-0001195 FEATURES AND BENEFITS
- 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
- Allegro SM package with integrated EMC components eliminates need for external EMI protection
- True target state recognition at device power-on (TPOS)
- EEPROM programming for performance optimization, temperature compensation, and production traceability
- Flexible orientation: Able to be mounted at any angle with correct configuration
- Stray Field Immunity: Resists aggressor stray fields found in hybrid vehicle environments
- Backward compatibility with Allegro’s Hall-effect solutions performance
- Target Profile Diagnostics Self-Calibrating TPOS GMR Camshaft Speed Sensor IC Figure 1: Functional Block Diagram ATS16351PSM Not to scale PACKAGE: VCC GND OUT Output Output ControllerSynchronous Digital Controller Diagnostics EEPROM 1 OscillatorTemperature Sensor EMC Regulator (Analog) Regulator (Digital) GMR Yokes ADCAmp EEPROM 0 March 9, 2023 3-pin SIP (suffix SM)
GMR Camshaft Speed Sensor ICATS16351PSM Allegro MicroSystems
955 Perimeter Road
Manchester, NH 03103-3353 U.S.A. www.allegromicro.com PROGRAMMABLE OPTIONS Name Available Selections* Output Polarity Low opposite target tooth / high opposite target valley (L Option) High opposite target tooth / low opposite target valley (H Option) Switch Point Variation C82C85D30D30 (S01 Option) C89C89D0D0 (S00 Option) S(00-99): C(25-102) C(25-102) D(0-30)D(0-30) indicating threshold level and dynamic slope. 1st and 2nd C(25-102) indicates rising and falling threshold level from C25 to C102 that corresponds to ~20% to ~80% switch point threshold level with a step of ~0.78%. 1st and 2nd D(0-30) indicates rising and falling threshold dynamic slope from D1 to D30 that corresponds to ~0.225 to ~0.975%/mV with a step of ~0.025%/mV. Teeth Memory Number of teeth (memory count); programmable from 1 to 13 (Nx Option) Output Fall Time Slow: typical 5 µs (S Option) Average: typical 2.5 µs (A Option) Fast: typical 1.2 µs (F Option) Running Mode Hidden Hysteresis 10% (S Option) 15% (R Option) 20% (B Option) 30% (V Option) Delay Time (tradeoff of jitter vs. speed effect) No extra delay time (smallest speed effect): 16.7 µs (T1 Option) Small extra delay: 19.7 µs (T2 Option) Medium extra delay: 20.3 µs (T3 Option) Large extra delay (best jitter performance): 40 µs (T4 Option) Target Profiling Diagnostics Magnetic profile available on output (-D option) Magnetic profile unavailable on output ([blank] option) *Not all combinations of programmable options are available pre-programmed from Allegro. Contact Allegro for details. SELECTION GUIDE Part Number* Package Packing ATS16351PSMGTN-LS01N12BFRT1-D 3-pin SIP with NiPdAu leadframe plating Tape and reel, 800 pieces per 13-inch reel ATS16351PSMGTN-LS00N12BFRT1-D *Not all combinations of programmable options are available pre-programmed from Allegro. Contact Allegro for details.
GMR Camshaft Speed Sensor ICATS16351PSM Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Target profile diagnostic feature: -D: Feature enabled [blank]: Feature disabled Delay time (typical): T1: 16.7 µs T2: 19.7 µs T3: 20.3 µs T4: 40 µs Hidden hysteresis (typical): S: 10% R: 15% B: 20% V: 30% Typical Output fall time: S: 5 µs A: 2.5 µs F: 1.2 µs Number of teeth memory N(1-13): Teeth (memory count) from N1 to N13 Switch Point variation S01 : C82C85D30D30 S00 : C89C89D0D0 Options: indicating threshold level and dynamic slope. 1st and 2nd C(25-102) indicates rising and falling threshold level from C25 to C102 that corresponds to ~20% to ~80% switching point threshold level with a step of ~0.78%. 1st and 2nd D(0-30) indicates rising and falling threshold dynamic slope from D1 to D30 that corresponds to ~ 0.225 to ~ 0.975%/mV with a step of ~0.025 %/mV Output polarity L: Low over tooth H: High over tooth Packing type Package Temperature range Allegro identifier and device type □ □□
GMR Camshaft Speed Sensor ICATS16351PSM Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com ABSOLUTE MAXIMUM RATINGS Characteristic Symbol Notes Rating Unit Supply Voltage VCC 27 V Reverse Supply Voltage VRCC –18 V Output Voltage VPU 27 V Reverse Output Voltage VROUT RPU ≥ 1000 Ω –0.5 V Output Current IOUT Internal current limiting is intended to protect the device from output short circuits but is not intended for continuous operation. 25 mA Reverse Output Current IROUT VOUT > –0.5 V, TA = 25°C –50 mA Operating Ambient Temperature TA Range P –40 to 160 °C Maximum Junction Temperature TJ(max) 175 °C Storage Temperature Tstg –65 to 170 °C Applied Magnetic Flux Density B In any direction 150 G PINOUT LIST Number Name Function
1 VCC Supply voltage
2 GND Ground
3 OUT Device output
INTERNAL DISCRETE COMPONENT RATINGS Symbol Characteristic Rating Unit CSUPPLY Nominal Capacitance 220 nF COUT Nominal Capacitance 2.2 nF RSUPPLY Nominal Resistance 33 Ω ROUT Nominal Resistance 20 Ω VS VPU RPU VCC OUT
2 GND
Figure 2: Typical Application Circuit Figure 3: Pinout Diagram
GMR Camshaft Speed Sensor ICATS16351PSM Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com OPERATING CHARACTERISTICS: Valid throughout full operating and temperature ranges; using Reference Target 8X, unless otherwise noted Characteristics Symbol Test Conditions Min. Typ. [1] Max. Unit
ELECTRICAL CHARACTERISTICS
Supply Voltage VCC Continuous operation, TJ < TJ (max) 3.6 – 24 V Supply Current ICC 5 7 10 mA Supply Zener Clamp Voltage VZsupply ICC = ICC(MAX) + 3 mA 27 – – V Reverse Supply Zener Clamp Voltage VRZsupply ICC = –3 mA, TA = 25°C – – –18 V OUTPUT STAGE CHARACTERISTICS Output LOW Voltage VOUT(SAT) IOUT = 5 mA – – 300 mV IOUT = 15 mA – – 800 mV Output Zener Clamp Voltage VZoutput IOUT = 3 mA, TA = 25°C 27 – – V Output Current Limit IOUT(LIM) Output = LOW 30 – 80 mA Output Leakage Current IOUT(OFF) VOUT = 24 V, Output = HIGH – – 10 µA Output Rise Time tr Measured 10%-90% of VOUT; RPU = 1 kΩ, VPU = 5 V – 5 – µs Output Fall Time tf Measured 90%-10% of VOUT; RPU = 1 kΩ, VPU = 5 V A fall time option 2.5 5 9 µs M fall time option 1.5 2.5 3.5 µs F fall time option 0.5 1.2 2.5 µs Measured 90%-10% of VOUT; RPU = 1 kΩ, VPU = 12 V A fall time option – 8 – µs F fall time option – 2 – µs [1] Typical values are at TA = 25°C and VCC = 5 V. Performance may vary for individual units, within the specified maximum and minimum limits. VOUT(high) VOUT(low) V (V) OUT V (%) OUT tr tr 100 Figure 4: Output Rise Time and Output Fall Time
GMR Camshaft Speed Sensor ICATS16351PSM Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com OPERATING CHARACTERISTICS (continued): Valid throughout full operating and temperature ranges; using Reference Target 8X, unless otherwise noted Characteristics Symbol Note Min. Typ. Max. Unit PERFORMANCE CHARACTERISTICS Operational Air Gap Range AG TPOS guaranteed 1.5 – 4 mm Extended Operational Air Gap Range Running mode switching, TPOS not guaranteed; Allegro reference target 8X – – 4.5 mm Signal Bandwidth BW Equivalent to –3 dB cutoff frequency – >8 – kHz Phase Delay Electrical falling edges; RPU = 1 kΩ, VPU = 5 V; fall time to be added to this value Option T1 – 16.7 – µs Option T2 – 19.7 – µs Option T3 – 20.3 – µs Option T4 – 40 – µs POWER-ON CHARACTERISTICS Power-On Time [2] tPO fOP < 100 Hz, time from VCC > VCC(MIN) to when IC enters calibration mode – – 1 ms TPOS Mode Number of mechanical edges after power-on with output switching on TPOS threshold M Option – N N + 3 [3] tooth Learning Mode Number of target teeth after TPOS Mode with reduced accuracy threshold-based output switching M Option – – 1 tooth [2] Power-On Time consists of the time from when VCC rises above VCC(MIN) until a valid output state is realized. [3] On some particular startup angle and air gaps, 1 to 3 extra teeth can be switching on TPOS before going on normal switching point.
GMR Camshaft Speed Sensor ICATS16351PSM Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com OPERATING CHARACTERISTICS (continued): Valid throughout full operating and temperature ranges; using Reference Target 8X, unless otherwise noted Characteristics Symbol Note Min. Typ. Max. Unit OPERATING MODE CHARACTERISTICS Output Polarity VOUT Opposite target tooth, connected as in Figure 2 L option Low V H option High V Opposite target valley, connected as in Figure 2 L option High V H option Low V Threshold Update Memory N Number of target teeth (peaks) stored in memory for threshold update algorithm 1 – 13 tooth Rising Threshold BOP % of peak-to-peak, referenced to tooth signal. Programmable with a step of 0.78%. Defined as Cx in the programming options 20 [4] – 80 [5] % Falling Threshold BRP % of peak-to-peak, referenced to tooth signal. Programmable with a step of 0.78%. Defined as Cx in the programming options 20 [4] – 80 [5] % Rising Threshold Slope SOP Slope for rising Dynamic threshold feature. Programmable with a step of 0.025. Set to 0 to disable [6]. Defined as Dx in the programming options. 0.225 – 0.975 %/mV Falling Threshold Slope SRP Slope for falling Dynamic threshold feature. Programmable with a step of 0.025. Set to 0 to disable [6]. Defined as Dx in the programming options. 0.225 – 0.975 %/mV Running Mode Hysteresis BHYS(int) Programmable option % of peak-to-peak signal H1 option – 10 – % H2 option – 15 – % H3 option – 20 – % H4 option – 30 – % Maximum Allowable Signal Reduction Breduce Reduction in magnetic signal amplitude between two consecutive peaks; all specifications within range. – – BOP – 15% % Reduction in magnetic signal amplitude between two consecutive peaks; output switches, accuracy performance not guaranteed. – – BOP – 5% % [4] This is the minimum value it can be programmed if hidden hysteresis is set at 15% If hidden hysteresis is not 15%, this limit becomes such that: (BOP or BRP) – hidden hysteresis > 5%. [5] This is the maximum value it can be programmed if hidden hysteresis is set at 15% If hidden hysteresis is not 15%, this limit becomes such that: (BOP or BRP) + hidden hysteresis < 95%. [6] See Switching Point section for more details about dynamic threshold feature. B, BOP RP VPROC(high) +BHYS(int) Switch Point Level –BHYS(int) VPROC(low) V (%) PROC On Off On Off Output State for LO ption Time Figure 5: Switch Points with Internal Hysteresis
GMR Camshaft Speed Sensor ICATS16351PSM Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Reference Target 8X of Package Branded Face REFERENCE TARGET 8X Characteristic Symbol Test Conditions Typ. Units Symbol Key Outside Diameter Do Outside diameter of target 120 mm t tV ØDO ht FBranded Face of Package Air Gap Face Width F Breadth of tooth, with respect to branded face 6 mm Circular Tooth Length t Length of tooth, with respect to branded face; measured at Do 23.6 mm Circular Valley Length tv Length of valley, with respect to branded face; measured at Do 23.6 mm Tooth Whole Depth ht 5 mm Material CRS 1018 – –
GMR Camshaft Speed Sensor ICATS16351PSM Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com FUNCTIONAL DESCRIPTION Sensing Technology The ATS16351 contains a GMR bridge with an optimized custom magnetic circuit that switches in response to magnetic signals induced by a ferromagnetic target. The IC includes a self-calibrating GMR element that senses differences in mag - netic field strength induced by ferromagnetic target teeth and valleys. The sensor generates a digital output signal that is rep - resentative of the target features, independent of the direction of target rotation or rotational orientation. The transducer and the electronics are integrated on the same silicon substrate by a proprietary BiCMOS process. Changes in temperature do not negatively affect this device due to the stable amplifier design and advanced digital temperature compensation. The IC also contains a voltage regulator that provides undervoltage lockout and supply noise rejection over the operating voltage range. Target Profiling The polarity of the output is selectable to be either low opposite target teeth (L option) or high opposite target teeth (H option). See Figure 6. Target Mechanical Profile |B| Target Magnetic Profile Processed Input Signal, VPROC Va lley LO ption (Inverting) Output Switch State V= HighOUT V= LowOUT HO ption (Following) Output Switch State V= HighOUT V= LowOUT On On On On On On On On Off Off Off Off Off Off Off Off Toot h Figure 6: Output Polarity (when connected as shown in Figure 2) Threshold Update The ATS16351 has two sets of programmable options that deter- mine the threshold update used to establish running mode switch- ing levels. The positive peak threshold update is set to n teeth, which is programmable between one and thirteen. The negative peak threshold update can either be set to continuous or bounded update. With single tooth update (n = 1), the switching threshold for a tooth is established based on the measured peak value of the previous tooth. With single tooth update (n = 1), the switching threshold for a tooth is established based on the measured peak value of the previous tooth. This option can be used with targets having any number of teeth and is comparable to the continuous update mode used in many Allegro sensors. When n = 2 through 13, the device uses memory-based update. Peak information from the last n teeth is stored in on-chip memory. Switching thresholds for the upcoming tooth are estab- lished based on the stored information from n teeth earlier. When n is matched to the number of teeth on the target, this allows for optimized switch points based on the same tooth from the previ- ous revolution of the target. The programmable threshold update results in improved output switching accuracy on targets with runout and tooth-to-tooth variation (including narrow valleys). With continuous update (A option), the switching threshold for a tooth is based on the measured valley value of the previous tooth. This option provides backwards compatibility equivalent to some older generations of Allegro TPOS camshaft cells. With bounded update (B option), large tooth-to-tooth changes in the negative peak tracking are filtered out and not applied to switching threshold generation. This option provides improved output accuracy on camshaft targets with narrow valley widths. Switch Points and Hysteresis The running mode switch points in the ATS16351 are established dynamically as a percentage of the tracked peaks and valleys, as described in the Threshold Update section. There are two meth- ods for deciding the switching point levels: classic fixed switch- ing points and dynamic switching points. With the classic fixed switching points, the switching point levels can be programmed from 20% to 80% (when default hidden hysteresis is selected) with a step of 0.78%. If hidden hysteresis is not 15%, this limit becomes such that: BOP/BRP + hidden hysteresis < 95% and BOP/ BRP – hidden hysteresis < 5%. The slopes programming should
GMR Camshaft Speed Sensor ICATS16351PSM Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com be set to 0 in order to have these fixed classic switching point levels. The dynamic switching points are activated if a slope is selected. This mode determines the best switching point level per air gap for a given target and a given hard offset. To learn how to pro- gram this for a specific target, contact Allegro. Internal hysteresis allows for high performance switching accu- racy on both rising and falling edges while maintaining immunity to false switching on noise, vibration, backlash, or other transient events (see Figure 5). The default value of this hidden hyster- esis is 15% (typical). Different values are possible, up to 10%, 15%, 20%, or 30%; contact Allegro for parts with higher hidden hysteresis. A higher hidden hysteresis allows for higher immunity to noise, vibration, or stray field. The downside of having a high hidden hysteresis is the limitation on signal reduction or tooth-to- tooth variation. Also having different values of hidden hysteresis limits the maximum and minimum values for the switching point levels as described on previous paragraphs. Operating Modes TPOS MODE After power-on, the output state is determined by the level of the detected magnetic field relative to the fixed-gauss TPOS threshold, which is programmed at Allegro. The device remains in TPOS Mode for a number of edges that is dependent on the TPOS to Running mode transition option selected: rapid (R option), qualified (Q option), or memory based (M option). With the rapid option, once the magnetic signal movement exceeds a fixed startup hysteresis value, the device immediately transitions to calibration mode and threshold-based switching. The R option provides the fastest transition to running mode thresholds, but in certain startup scenarios this can result in a large difference in output accuracy between the first edge and the same running mode edge. With the qualified option, the device remains in TPOS mode for at least two edges before transitioning to running mode. The Q option provides the lowest worst-case output accuracy difference between the first edge and subsequent running mode edges. With the memory-based option, the device remains in TPOS mode for n teeth, which is programmable between one and twelve, to guarantee it has correctly captured enough peaks to fill the running mode threshold memory. The M option provides the slowest transition to running mode thresholds but provides best runout capability. SELF-CALIBRATING TPOS FEATURE The self-calibrating TPOS feature of the ATS16351 enables the sensor IC to learn the installation air gap inside of the engine and autonomously reprogram into memory the optimal threshold for power-on accuracy. The first time the device is powered on, it will use the factory TPO value that is written in EEPROM. After the first cycles, if there is a significant difference between the fac- tory TPO and the optimal TPO (middle point of the signal) value the device will self-write the optimal TPO value in EEPROM for all future use. CALIBRATION MODE In calibration mode, the ATS16351 uses threshold-based switch- ing with continuous update. This ensures that all teeth and valleys are captured correctly but provides slightly reduced accuracy relative to running mode. The device stays in calibration mode long enough to guarantee it has correctly captured enough peaks to fill the running mode threshold memory. After calibration mode is complete, the device transitions to running mode. RUNNING MODE In running mode, the ATS16351 uses threshold-based switching with internal hysteresis as described in the previous Threshold Update, Switch Points, and Hysteresis sections. The threshold update is intended to optimize output switching accuracy when used with common camshaft targets, including cases with runout and narrow target valleys. WATCHDOG The ATS16351 has a peak detector continuously tracking the magnetic signal. If a sudden large signal change causes the sensor output to stop switching, but the peak detector continues to detect valid signal movement, the watchdog will be triggered. When it is triggered, the sensor performs a self-reset and returns to initial startup hysteresis mode to regain output switching. Target Profile Diagnostics Target Profile Diagnostics allows customers to characterize a gear target during manufacturing, and to detect any subtle gear tooth anomalies that may exist before an engine is installed into the vehicle, thus saving cost. It has the potential to reduce warranty returns, thus increasing customer satisfaction.
GMR Camshaft Speed Sensor ICATS16351PSM Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com POWER DERATING The device must operate below the rated maximum junction temperature of the device, TJ(max). Under certain peak operating conditions, reliable operation may require power supply voltage derating and/or improved heat dissipation to ensure proper operation. This section presents a procedure for correlating factors that affect the operating junction tem- perature TJ. (Thermal data is also available on the Allegro MicroSystems website.) The Package Thermal Resistance, RθJA, is a figure of merit summariz- ing the ability of the package to dissipate heat from the junction (die), through all paths, to the ambient air. Its primary component is the Effec- tive 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 tem- perature, TA, and air motion are significant external factors, damped by overmolding. The effect of varying power levels (Power Dissipation, PD) can be esti- mated. The following formulas represent the fundamental relationships used to estimate TJ, at PD. PD = VIN × IIN (1) ΔT = PD × RθJA (2) TJ = TA + ΔT (3) For example, given common conditions such as: TA= 25°C, VCC = 12 V, ICC = 7 mA, and RθJA = 147°C/W, then: PD = VCC × ICC = 12 V × 7 mA = 84 mW ΔT = PD × RθJA = 84 mW × 147°C/W = 12.3°C A worst-case estimate, PD(max), represents the maximum allowable power level (VCC(max), ICC(max)), without exceeding TJ(max), at a selected RθJA and TA. Example: Reliability for VCC at TA = 160°C, estimated values based on package SM, using single layer PCB. Observe the worst-case ratings for the device, specifically: RθJA = 147°C/W, TJ(max) = 175°C, VCC(absmax) = 24 V , and ICC = 10 mA. Calculate the maximum allowable power level, PD(max). First, solve equation 3 for ΔT(max), the specified TJ(max), and TA: ΔT(max) = TJ(max) – TA = 175°C – 160 °C = 15 °C This provides the allowable increase to TJ resulting from internal power dissipation. Then, solve equation 2 for PD(max): PD(max) = ΔT(max) ÷ RθJA = 15°C ÷ 147°C/W = 102 mW Finally, solve equation 1 with respect to supply voltage: VCC(est) = PD(max) ÷ ICC = 102 mW ÷ 10 mA = 10.2 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 reliable opera- tion 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. THERMAL CHARACTERISTICS : May require derating at maximum conditions Characteristic Symbol Test Conditions* Value Unit Package Thermal Resistance RθJA 1-layer PCB with copper limited to solder pads 147 °C/W *Additional thermal information available on the Allegro website.
GMR Camshaft Speed Sensor ICATS16351PSM Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Package SM, 3-Pin SIP For Reference Only – Not for Tooling Use (Reference DWG-0000417, Rev. 3) Dimensions in Millimeters – NOT TO SCALE Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown
0.90 REF
B 2 × 7° 2 × 10° A Branded Face 2 × 2.40 ±0.10 5.78 ±0.10
6.42 REF
2.66 REF
0.60 REF
0.79 REF
7.65 ±0.10 15.58 ±0.10
19.24 REF
23.36 REF
1.60 ±0.10 5.00 ±0.10 A B C C D Branding scale and appearance at supplier discretion 7.00 ±0.10 E E
0.30 REF
3 × 1.00 ±0.10 3 × 0.51 REF 0.25 ±0.05 Plating included 2.00 ±0.10 2 × 1.27 ±0.10 1.15 ±0.05 F1 F3 2.89
0.65 REF
F F F F
7.99 REF
Dambar removal protrusion (12×) Gate and tie bar burr area Active Area Depth 0.60 ±0.05 mm Molded lead bar for preventing damage to leads during shipment GMR elements (F1, F2, and F3), not to scale F2F 2.80 1.02 1.02 Lines 1, 2, 3, 4: Up to 10 characters, centered Line 1: Logo A Line 2: Characters 5, 6, 7, 8, 9, 10, 11 of Assembly Lot Number Line 3: Part Number: 3 character prefix (ATS), 5 digit part number (16351), 0-2 character part variant (XX). Example: ATS16351B Line 4: 4 digit Date Code Standard Branding Reference View Lot Number ATS16351XX Date Code D 2 31 F F
GMR Camshaft Speed Sensor ICATS16351PSM Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com 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.
Revision History
– March 2, 2022 Initial release