ATS672LSB Preliminary – Subject to Change Self-Calibrating TPO Gear-Tooth Sensor with 9-Bit Signal Capture PIN OUT DIAGRAM 4321 Pin 1: VCC Pin 2: VOUT Pin 3: Test Pin (Tie to GND) Pin 4: Gnd ABSOLUTE MAXIMUM RATINGS Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . 28 V Reverse Supply Voltage, VR . . . . . . . . . . . . . . . . . . . . . . . . . . . . –18 V Reverse Current Through Output, IR . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 mA Continuous Output Current, IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mA Storage Temperature, TS . . . . . . . . . . . . . . . . . . . . . . . . . . . 170° C Package Power Rating, RθJA. . . . . . . . . . . . . . . . . . . ~150°C/W Maximum Junction Temperature, TJmax . . . . . . . . . . . . . . . . . . . . . . . . . 170° C Maximum Junction Temperature – 100 Hours, TJmax . . . . . . . . . . . . . . . . . . . . . . . . . 180° C The ATS672LSB true zero-speed gear-tooth sensors are optimized Hall IC/magnet configurations packaged in a single inline package (SIP) that provides a user-friendly solution for digital gear-tooth-sensing applications. The SIP module consists of an over-molded package, which holds together a samarium cobalt magnet, a pole piece and a true zero-speed Hall IC that has been optimized to the magnetic circuit. This small package can be easily assembled and used in conjunction with gears of various shapes and sizes. The sensor incorporates a single-element Hall IC that switches in response to magnetic signals created by a ferrous target. The IC contains a sophisticated digital circuit designed to eliminate the detrimental effects of magnet and system offsets. Signal processing is used to provide zero-speed performance independent of air gap and also to dynamically adapt device performance to the typical operating conditions found in automotive applications (reduced vibration sensitivity). Highresolution (9-bit) peak-detecting DACs are used to set the adaptive switching thresholds of the device. Hysteresis in the thresholds reduces the negative effects of any anomalies in the magnetic signal (such as magnetic overshoot). The ATS672LSB also includes a low-bandwidth filter that increases the noise immunity and the signal-to-noise ratio of the sensor. These features result in potential improvements in both the timing accuracy and the jitter performance of the device. The ATS672LSB sensor system is optimized for cam applications. Four versions of this device are available. The sensor can be chosen to have a high or low output signal in response to a “tooth”. The sensor is also available with and without TPOS (true power on state) capability. The low-on-tooth sensor without TPOS is available through general sales. (Part # ATS672LSB-LN). For other versions please contact the factory. Some restrictions may apply. FEATURES Tight timing accuracy over temperature True zero-speed operation True power-on sensing Air gap independent switch points High vibration immunity Large operating air gaps Operation down to 3.3 V Digital output representing target profile Single-chip solution for high reliability Small mechanical size Optimized Hall IC magnetic system AGC and reference-adjust circuit Undervoltage lockout ATS672LSB SELF-CALIBRATING TPOS GEAR-TOOTH SENSOR WITH 9-BIT SIGNAL CAPTURE Preliminary – Subject to Change OPERATING CHARACTERISTICS Valid at TA = -40°C to +150°C and power supply within specification unless otherwise noted Characteristics Symbol Limits Test Conditions Min. Typ. Max. Units 26.5 V -18 V 37 V 100 mA ELECTRICAL CHARACTERISTICS Supply Voltage VCC Operating; TJ < TJmax Reverse Supply Voltage VRCC IRCC = -5 mA (max) Supply Zener Clamp Voltage VZ Supply Zener Current IZ Supply Current ICC 3.3 28 33 Tj < Tjmax; pulsed Output = off 3.0 6.5 11 mA Output = on 3.0 6.5 11 mA Gear Speed < 100 rpm; Vcc> 3.3 V - 500 µs - <VccMin V POWER-ON STATE CHARACTERISTICS Power Up Time tPO Under Voltage Lockout VUV OUTPUT STAGE Low Output Voltage VOUT IOUT = 15 mA, Output = on - 0.2 0.45 V Output Current Limit Ilin Output = ON, Tj < Tjmax 25 45 70 mA IOFF Output = off, VOUT = Vcc(Max) - 10 µA Output Rise Time tr RL = 500 Ω, CL = 10 pF, TA = 25°C - 0.9 5.0 µs Output Fall Time tf RL = 500 Ω, CL = 10 pF, TA = 25°C - 0.5 5.0 µs Output Leakage Current Rise and Fall Time Output High 90% 90% 100% 10% 10% tr tf Output Low Time [Seconds] Rev. 1.2 May 1, 2002 Page 2 of 12 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. ATS672LSB SELF-CALIBRATING TPOS GEAR-TOOTH SENSOR WITH 9-BIT SIGNAL CAPTURE Preliminary – Subject to Change Characteristics Symbol Limits Test Conditions Min. Typ. Max. Units 8.0 kHz SWITCH POINT CHARACTERISTICS Tooth Speed Smax Bandwidth f-3db Operate Point Bop% Release Point Brp% Output Polarity ATS672LSB-LN (no TPOS) VOUT ATS672LSB-LT (with TPOS)* Output Polarity ATS672LSB-HN (no TPOS)* VOUT ATS672LSB-HT (with TPOS)* * Restrictions on availability may apply. 0 % of peak to peak referenced to tooth signal, AG < Agmax; % of peak to peak referenced to tooth signal, AG < Agmax; Over valley 40 kHz +30 % +40 % HIGH Over tooth LOW Over valley LOW Over tooth HIGH Calibration Initial Calibration CI AGC Disable Cf Number of rising mechanical edges for accurate edge detection Number of rising mechanical edges required to complete AGC calibration 3 Edges 3 Edges Switchpoints Tooth Signal Bop% Brp% 100% Bop% Brp% Valley Signal Rev. 1.2 May 1, 2002 Page 3 of 12 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. ATS672LSB SELF-CALIBRATING TPOS GEAR-TOOTH SENSOR WITH 9-BIT SIGNAL CAPTURE Preliminary – Subject to Change OPERATION WITH 8X Reference Target over Operational Air Gap and Temperature with Test Circuit #1 Unless Otherwise Stated Limits Characteristics Symbol Test Conditions Min. Typ. Max. Units Rising and falling edge, RPM = 1000 3.0 6.0 ° tICRel during initial calibration gear eccentricity < 0.1 mm Rising mechanical edge 1 Relative Timing Accuracy tRel after initial calibration, RPM = 1000 0.3 0.6 ° gear eccentricity < 0.1 mm Falling mechanical edge tRel 0.5 0.8 ° after initial calibration, RPM = 1000 gear eccentricity < 0.1 mm Rising mechanical edge tAbsRise -0.2 ° air gap: 1.5mm, temperature: 25°C RPM: 1000 2 Absolute Timing Accuracy Falling mechanical edge tAbsFall +0.6 ° air gap: 1.5mm, temperature: 25°C RPM: 1000 x 10-5° After initial calibration 3 6.66 Phase Delay tRelSpeed air gap: 1.5 mm, temperature: 25°C / RPM 4 Valleys may be detected as teeth: TPOS Air Gap Min 0.5 mm AGMin incorrect TPOS ATS672LSB – LT and HT 5 TPOS Air Gap Range ATS672LSB – LT and HT AGTPOS Distance for correct TPOS functionality 0.5 - 2.25 mm TPOS Air Gap Max ATS672LSB – LT and HT AGMax Teeth may be detected as a valley: incorrect TPOS 2.25 - 5.0 mm Operational Air Gap Range AG Output switching: running mode only 0.5 - 2.25 mm Edge Repeatability tθE 360° repeatability, 1000 edges 6 0.04 ° 1 Relative Timing Accuracy Range is the change in edge position over the operational air gap and temperature range that can be expected from a single device. This does not include part-to-part variation. 2 The Typical Absolute Timing Accuracy is the difference between the target mechanical edge (rising or falling) and the corresponding sensor electrical edge. 3 Phase Delay is the change in edge position over the operational RPM range that can be expected from a single device. This does not include part-to-part variation or variation due to temperature. 4 The TPOS Air Gap Min is the Installation Air Gap where the device may detect Valleys as Teeth. The True Power On Function is NOT guaranteed to operate. 5 The TPOS Air Gap Range is the Installation Air Gap Range where the True Power On Function is guaranteed to operate. Operating is defined as correctly detecting a tooth when powered up over a tooth and correctly detecting a valley when powered up over a valley using the Reference Target. This specification is only valid for targets that meet or exceed the ‘Gear Parameters for Correct TPOS Operation’ section of this document. 6 The TPOS Air Gap Max is the Installation Air Gap where the device may detect a Tooth as a Valley. The True Power On Function is NOT guaranteed to operate. Rev. 1.2 May 1, 2002 Page 4 of 12 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. ATS672LSB SELF-CALIBRATING TPOS GEAR-TOOTH SENSOR WITH 9-BIT SIGNAL CAPTURE Preliminary – Subject to Change Relative Timing Accuracy Absolute Timing Accuracy Target Target TAbsRise TAbsFall Device Output TAbsRise (Max - Min) Device Output TAbsFall (Max - Min) TAbsFall (Max - Min) Operational Air Gap TPOS Air Gap Valley Valley Tooth Tooth TPOS Air Gap Air Gap Min TPOS Air Gap Range TPOS Air Gap Phase Delay [°] Phase Delay with RPM 0 Rev. 1.2 May 1, 2002 Page 5 of 12 RPM Max RPM 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. Max ATS672LSB SELF-CALIBRATING TPOS GEAR-TOOTH SENSOR WITH 9-BIT SIGNAL CAPTURE Preliminary – Subject to Change Output Rise Time: R = 500 Ω, C = 10 pF Rev. 1.2 May 1, 2002 Page 6 of 12 Output Fall Time: R = 500 Ω, C = 10 pF 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. ATS672LSB SELF-CALIBRATING TPOS GEAR-TOOTH SENSOR WITH 9-BIT SIGNAL CAPTURE Preliminary – Subject to Change Reference Target Dimensions Target Reference Target Diameter (Do) 120 mm Thickness (F) 6.0 mm Tooth Width (T) 23.6 mm Valley Width (PC – T) 23.6 mm Valley Depth (ht) 5.0 mm Reference Target Reference Target Dimensions GEAR PARAMETERS FOR CORRECT TPOS OPERATION Characteristic Valley Depth (ht) Valley Width (PC – T) Tooth Width (T) Thickness (F) 1 Description Depth of target valley Length and width of target valley Width of target tooth Thickness or length of target tooth Min. 5.0 13 5.0 5.0 Limits Typ. Max. - Units mm mm mm mm MATERIAL PROPERTIES: CRS 1018 1 The target must generate a minimum of 120 gauss difference between the tooth field and the valley field at the Maximum Installation Air Gap. With the materiel and dimensions mentioned above the target will generate the required 120 gauss. Rev. 1.2 May 1, 2002 Page 7 of 12 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. ATS672LSB SELF-CALIBRATING TPOS GEAR-TOOTH SENSOR WITH 9-BIT SIGNAL CAPTURE Preliminary – Subject to Change MECHANICAL INFORMATION Component Material Function Value 8 mm D x 4 mm L SmCo – R22 Sensor Package Material Thermoset epoxy Leads Copper, 0.016” dia, 0.050” spacing Lead Coating Solder, tin / lead 90/102 170°C1 Max. temperature 1 Temperature excursions of up to 225°C for 2 minutes or less are permitted. All industry accepted soldering techniques are acceptable for this sub-assembly as long as the indicated maximum temperatures for each component are not exceeded. 2 DEVICE QUALIFICATION PROGRAM Test Name High Temperature Operating Life Test Conditions AEC-Q100 #2 (JA108) Ta = 150°C, Tj = 165°C AEC-Q100 #3 (JA103) High Temperature Bake Ta = 170°C Temperature Humidity AEC-Q100 #5 (JA101) Bias 85°C/85%RH Autoclave AEC-Q100 #6 (JA102) Temperature Cycling ESD Early Life Failure Rate Thermal Shock AEC-Q100 #7(JA104) AEC-Q100 #20 (AEC-Q100002, AEC-Q100-003) AEC-Q100 #25 (AEC-Q100008) -40°C to +150°C, 1 minute transition, 10 minute dwell Rev. 1.2 May 1, 2002 Page 8 of 12 Test Length # of Lots Sample / lot 408 hrs 3 77 1000 hrs 3 77 1008 hrs 3 77 96 hrs 3 77 500 cycles 3 77 - 1 150°C/24 hrs 3 800 100 cycles 3 77 Comments -65°C to +160°C, 30 sec. transition, 30 minute dwell 3/model/step HBM & MM 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. ATS672LSB SELF-CALIBRATING TPOS GEAR-TOOTH SENSOR WITH 9-BIT SIGNAL CAPTURE Preliminary – Subject to Change Functional Block Diagram AUTOMATIC GAIN CONTROL OFFSET ADJUST HALL AMP LPF TC ADJUST Offset Internal Regulator (Analog) Pin1 VCC TC DIFF TPOS TPOS OUTPUT POR VREF TPOS TRIM Internal Regulator (Digital) POWER ON INITIALIZE 9-BIT PDAC COMP_P THRESHOLD COMPARATOR PDAC DIFF AGGRESSIVE UPDATE LOGIC VTHRESH 9-BIT COUNTER OUTPUT STATE CLK DIFF THRESHOLD OUTPUT OUTPUT DRIVER Pin2 OUTPUT STATE THRESHOLD OUTPUT NDAC 9-BIT NDAC COMP_N AGGRESSIVE UPDATE LOGIC OUTPUT STATE 9-BIT COUNTER CLK Rev. 1.2 May 1, 2002 Page 9 of 12 1M OSC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. ATS672LSB SELF-CALIBRATING TPOS GEAR-TOOTH SENSOR WITH 9-BIT SIGNAL CAPTURE Preliminary – Subject to Change EMC CAPABILITY All EMC tests shall be conducted at 23±5°C Test Name Inductive transient Inductive transient Switching transients Low voltage drop-out Load dump transient Starting transient Power-off transient ESD – Human Body Model (HMB) ESD – Machine Model (MM) Direct RF Injection Bulk Current Injection TEM Cell Reference Specification Circuit Parameters ISO 7637-1, Test Level ISO 7637-1, Test pulse 1 Test circuit #1 ISO 7637-1, Test pulse 2 Test circuit #1 ISO 7637-1, Test pulses 3a & 3b Test circuit #1 ISO 7637-1, Test pulse 4 Test circuit #1 ISO 7637-1, Test pulse 5 Test circuit #1 ISO 7637-1, Test pulse 6 Test circuit #1 ISO 7637-1, Test pulse 7 Test circuit #1 I A - Performance II III 1 C C 1 C - AEC-Q100-002 No additional components Passes to +/- TBD AEC-Q100-003 No additional components Passes to +/- TBD Test circuit #1 Test circuit #1 Test circuit #1 TBD TBD Passes to 200 V/m ISO 11452-7 ISO 11452-4 ISO 11452-3 Test circuits for electromagnetic compatibility and Typical Operating Schematic Test circuit 1 RS 100 Ω Vemc 5V 1 RL 1.2 kΩ 2 0.1 µF 120 pF GND 1 Vs 4 3 (Must be Grounded) Additional protection circuitry is required to protect the device from destruction above this voltage level. Rev. 1.2 May 1, 2002 Page 10 of 12 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. IV C C A A E E C ATS672LSB SELF-CALIBRATING TPOS GEAR-TOOTH SENSOR WITH 9-BIT SIGNAL CAPTURE Preliminary – Subject to Change Power Derating Curve: ATS672LSB Package ∆T=PD * RθJA Where PD=Vcc * Icc ∴ ∆T=Vcc * Icc * RθJA Maximum Power Dissipation vs. Ambient Temperature SB Package: Thermal Resistance: 150°C/Watt 1000 900 Maximum Allowable Power Dissipation [mW] Power Derating Due to internal power consumption, the temperature of the IC (junction temperature, Tj) is higher than the ambient environment temperature, Ta. To ensure that the device does not operate above the maximum rated junction temperature use the following calculations: 800 700 600 500 400 300 200 100 Where ∆T denotes the temperature rise resulting from the IC’s power dissipation: TJ = TA + ∆T RθJA =150°C/W TJ(max) = 170°C 0 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 Ambient Temperature [°C] Typical TJ Calculation: TA =25°C, Vcc=5 V, Icc(On)=6.5 mA PD=Vcc * Icc PD= 5 V * 6.5 mA = 32.5 mW ∆T=PD* RθJA = 32.5 mW * 150°C/W = 4.9° TJ = TA + ∆T = 25°C + 4.9°C = 29.9°C Maximum Allowable Power Dissipation Calculation TJ = TA + ∆T TJ (max) = 170°C, if TA=160°C then: 170 = 160 + ∆T ∆T = 10°C ∆T = PD* RθJA (RθJA = 150°C/W) ∴ PD(max) = 10°C / 150°C/W = 66.6 mW @ TA = 160°C Maximum Vcc for PD(max) =111 mW at TA=160°C PD=Vcc * Icc Icc = 10 mA (max) at 160°C Vcc = PD / Icc = 66.6 mW / 10 mA = 6.66 V Rev. 1.2 May 1, 2002 Page 11 of 12 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. ATS672LSB SELF-CALIBRATING TPOS GEAR-TOOTH SENSOR WITH 9-BIT SIGNAL CAPTURE Preliminary – Subject to Change SB PACKAGE DRAWING Tolerances unless otherwise specified: 1 place ±0.1 mm, 2 places ±0.05 mm NOTE: Nominal dimensions and tolerances dependent on package material Rev. 1.2 May 1, 2002 Page 12 of 12 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc.