A1180 – A1184 Preliminary Data Sheet PRELIMINARY DATA SHEET SUBJECT TO CHANGE WITHOUT NOTICE See typical application drawing for UA pinning. ABSOLUTE MAXIMUM RATINGS Supply Voltage VCC …………………………………….. 26.5 V Reverse-Battery Voltage VRB ……………………………………… -18 V Magnetic Flux Density B …………………………………… Unlimited Package Power Dissipation θja, UA…………………………………. 206 °C/W LH1……………………………….….248 °C/W Junction Temperature, TJ ……………….. +170°C Operating Temperature Range, TA Suffix “E” …………….……. - 40 °C to + 85 °C Suffix “L” …………………. - 40 °C to + 150 °C Storage Temperature Range TS ………………………… -65 °C to +170 °C 1 Two-Wire, Programmable, Chopper-Stabilized, Unipolar Hall-Effect Switch The A118X is a two-wire, unipolar, Hall-effect switch family designed for use in high-temperature applications. This device uses a patented high frequency chopper-stabilization technique on Allegro's new DABIC5 BiCMOS wafer fabrication process to achieve magnetic stability and to eliminate offset inherent in single-element devices and from harshapplication environments. The A118X FAMILY of devices incorporates a programmability function to allow for external trimming of the operate point. The programming is performed after final packaging of the sensor and placement of the Single In-Line Package (SIP) into the application. This advanced feature allows for optimization of sensor switching performance by effectively accounting for variations caused by magnet and SIP placement tolerances. These devices provide on-chip transient protection. A zener clamp on the power supply protects against over-voltage conditions on the supply line. The output of the A118X FAMILY, with the exception of the A1180/2, will switch HIGH in the presence of a sufficiently large south-pole magnetic field and will switch LOW with the removal of the field. The A1180/2 has the opposite polarity as the others, switching LOW in the presence of a sufficient magnetic field and HIGH with the removal of the field. Two package styles provide a magnetically optimized package for most applications. Suffix “LH” is a miniature low profile package for surface-mount applications; suffix “UA” is a three-lead ultra-mini Single Inline Package (SIP) for through-hole mounting. Factory programmed versions also available, see A1140/42/43/45. Programming software and/or hardware demonstration kits also available see ASEK-01 on the Allegro web site, www.allegromicro.com. FEATURES / BENEFITS ♦ Chopper Stabilization s Extremely low switch-point drift s Low stress sensitivity ♦ One-time external programmability s Operate Point ♦ On-chip Protection s Supply transient protection s Robust ESD/EMC protection s Reverse-battery protection ♦ On-board Voltage Regulator s 3.8 V to 24 V operation Order by complete part number (i.e. A1182LUA). The “LH” PPD is based on a 0.062" thick FR4, single-sided board using 2 oz. copper, with a 0.55 mm2 area of copper attached to the ground lead. TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION – SUBJECT TO CHANGE) CHARACTERISTICS Valid over operating temperature range unless otherwise noted. Part Number Characteristics Symbol Limits Test Conditions Min. Typ. Max. Units 3.8 - 24 V ELECTRICAL CHARACTERISTICS A118X FAMILY Supply Voltage A1182/3/4 Supply Current A1180/1 2 VCC Supply Current 3 A118X IGND(L) Output I Low 5 - 6.9 mA IGND(H) Output I High 12 - 17 mA IGND(L) Output I Low 2 - 5 mA IGND(H) Output I High 12 - 17 mA - 20 - us - 20 - us Output Rise Time tr 3 tf Output Fall Time Operating RL=100 Ohms, CBYP=0.1uF RL=100 Ohms, CBYP=0.1uF Chopping Frequency fC - - 340 - kHz Power-Up Time ton - - - 25 µs Power-Up State POS - HIGH - - I = 10mA 28 36 40 V B>Bop, IGND=Low (A1180/2) IGND=High (A1181/3) 60 Zener Voltage VZ t < ton, tr < 5us, no bypass capacitor MAGNETIC CHARACTERISTICS A1180/1/2/3 4 Minimum Programmable Operate Point Maximum Programmable Operate Point Switch Point Step Size A1184 5 Minimum Programmable Operate Point Maximum Programmable Operate Point Switch Point Step Size BOPmin BOPmax BRES BOPmin BOPmax BRES Number of Programming Bits - Temperature Drift of BOP ∆BOP Hysterisis BHYS A118X 200 B>Bop, IGND=High (A1184) G G 8 G 300 G 600 - G 16 G Switch Point - 5 - Bit(s) Programming Lock - 1 - Bit(s) +/-20 G 30 G A1180-A1183 BOP - BRP 5 15 2 These are the A3161 current levels. Typical rise and fall time of the Hall sensor is 1us, the true rise and fall time is dependent on the load circuit as indicated by the 20us specification. 4 Programming is typically performed at Ta = 25°C and does not take into account temperature drift of the switch point. See ∆BOP. 5 Programming is typically performed at Ta = 25°C and does not take into account temperature drift of the sw itch point. ∆BOP has not yet been characterized for the A1184 and may require additional tolerance due to the high magnetic switch points. 3 Rev. 1.8 25 April 2003 Page 2 115 Northeast Cutoff, Box 15036 Worcester, Massachus etts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION – SUBJECT TO CHANGE) FUNCTIONAL BLOCK DIAGRAM Supply Program / Lock Reg Programmmin g Logic AMP To all subcircuits Offset Adjust S/H LPF GND Clock/Logi c Optional ("UA" GND ONLY-Pin 3) A1180/2 Hysteresis Curve A1181/3/4 Hysteresis Curve +I +I IccHigh Brp Output Current Output Current IccHigh Bop Brp IccLow 0 Bop IccLow 0 0 Flux Density Rev. 1.8 25 April 2003 Page 3 +B 0 Flux Density +B 115 Northeast Cutoff, Box 15036 Worcester, Massachus etts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION – SUBJECT TO CHANGE) Typical Characterization Data All data is the average of 1 Lot, >1000 Units Vcc=24v Bop 85G trim 94 140 90 Switch point (G) Switch point (G) 160 Vcc= 3.8v 92 Bop programming values 180 Vcc= 12v 88 86 84 82 120 100 80 60 40 80 20 78 -40 C 25 C 0 85 C 0 1 Temperature (C) 3 4 5 Significant Bit Vcc= 24v Iccon 17 Vcc= 12v 16.5 Vcc= 3.8v Vcc =12v 6.8 16 6.6 15.5 6.4 15 14.5 14 13.5 Vcc =3.8v 6.2 6 5.8 5.6 13 5.4 12.5 5.2 12 Vcc =24v Iccoff Current (mA) Current (mA) 2 5 -40 C 25 C Temperature (C) Rev. 1.8 25 April 2003 Page 4 85 C -40 C 25 C 85 C Temperature (C) 115 Northeast Cutoff, Box 15036 Worcester, Massachus etts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION – SUBJECT TO CHANGE) Functional Description Chopper-Stabilization Technique. A limiting factor for switch point accuracy when using Hall effect technology is the small signal voltage developed across the Hall plate. This voltage is proportionally small relative to the offset that can be produced at the output of the Hall sensor. This makes it difficult to process the signal and maintain an accurate, reliable output over the specified temperature and voltage range. Chopper Stabilization is a unique approach used to minimize Hall offset on the chip. The Allegro patented technique; dynamic quadrature offset cancellation, removes key sources of the output drift induced by temperature and package stress. This offset reduction technique is based on a signal modulation-demodulation process. The undesired offset signal is separated from the magnetically induced signal in the frequency domain through modulation. The subsequent demodulation acts as a modulation process for the offset causing the magnetically induced signal to recover its original spectrum at base band while the dc offset becomes a high frequency signal. Then, using a low-pass filter the signal passes while the modulated dc offset is suppressed. The chopper stabilization technique uses a 170 kHz high frequency clock. The Hall plate chopping occurs on each clock edge resulting in a 340 kHz chop frequency. The high frequency operation allows for a greater sampling, which produces higher accuracy and faster signal processing capability. Using this chopper stabilization approach, the chip is desensitized to the effects of temperature and stress. This technique produces devices that have an extremely stable quiescent Hall output voltage, is immune to thermal stress, and has precise recoverability after temperature cycling. This technique is made possible through the use of a BiCMOS process which allows the use of low offset and low noise amplifiers in combination with high-density logic integration and sample and hold circuits. The repeatability of switching with a magnetic field is slightly affected using a chopper technique. Allegro’s high frequency chopping approach minimizes the affect of jitter and makes it imperceptible in most applications. Applications that may notice the degradation are those that require the precise sensing of alternating magnetic fields such as ring magnet speed sensing. For those applications, Allegro recommends the “low jitter” family of digital sensors. Regulator Amplifier Sample/ Hold CLOCK Hall Element Concept of Dynamic Quadrature Offset Cancellation Rev. 1.8 25 April 2003 Page 5 115 Northeast Cutoff, Box 15036 Worcester, Massachus etts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION – SUBJECT TO CHANGE) PROGRAMMING PROTOCOL The operate points are programmed by serially addressing the devices through the supply terminal VCC (pin 1). After the correct operate point is determined, the device programming bits are permanently blown, and a locking bit is blown to prevent any further programming. Switch Point Program Enable. To program the device, a keying sequence is used to activate / enable the addressing mode as shown in Figure 1. This sequence consisting of a VPP pulse, one VPH pulse, and a VPP pulse with no supply interruptions, is designed to prevent the device from being programmed accidentally (e.g., as a result of noise on the supply line). Figure 1. Program Enable Pulse Sequence. Valid over operating temperature range unless otherwise noted. Part Number Characteristics Symbol Limits Test Conditions Min. Typ. Max. Units 4.5 5 5.5 V VPH 11.5 12.5 13.5 V VPP 25 26 27 V - 190 - mA 20 - - µs 20 - - µs 100 300 - µs PROGRAMMING PROTOCOL (T A = +25 °C) VPL Programming Voltage Programming Current A118X Family Pulse width 6 Minimum voltage range during programming IPP tr = 11us, 5V→26V, Cbypass = 0.1uF td(0) OFF time between bits td(1) tdP Pulse duration for enable and addressing sequences Pulse duration for fuse blowing Pulse Rise Time tr VPL to VPH or VPP 5 - 100 µs Pulse Fall Time tf VPH or VPP to VPL 5 - 100 µs 6 Programming Voltages are measured at Pin #1 (Vcc) of SIP. A minimum capacitance of 0.1uF must be connected from Vcc to GND of the SIP to provide the current necessary to blow the fuse. Rev. 1.8 25 April 2003 Page 6 115 Northeast Cutoff, Box 15036 Worcester, Massachus etts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION – SUBJECT TO CHANGE) …PROGRAMMING PROTOCOL CONT INUED Address N (Up to 31) Address N-1 Address N-2 Address 3 Address 2 Address 1 Addressing. The magnetic operate point (Bop) is adjustable using 5 bits or 31 addresses. The 31 addresses are sequentially selected (Figure 2) until the required operate point is reached. Note that the difference between Bop and the magnetic release point (Brp), the Hysteresis (Hys), is fixed for all addresses. VPH VPL td(1) td(0) 0 Figure 2. Sequential selected addresses. Code Programming. After the desired switch point address is selected (0 through 31), each bit of the corresponding binary address should be programmed individually, not at the same time. For example, to program code 5 (binary 000101), bits 1 (code 1) and bit 3 (code 4) need to be programmed. Bit programming is accomplished by addressing the code and applying a VPP pulse, the programming is not reversible. An appropriate sequence for blowing code 5 is shown in Figure 3. Figure 3. Bit programming. Lock-Bit Programming. After the desired code is programmed, the lock bit, or code 32, can be programmed (figure 4) to prevent further programming of the device. Figure 4. Lock-bit programming See Allegro website at http://www.allegromicro.com for extensive information on device programming as well as programming products. Programming hardware is available for purchase and programming software is available for free. Rev. 1.8 25 April 2003 Page 7 115 Northeast Cutoff, Box 15036 Worcester, Massachus etts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION – SUBJECT TO CHANGE) TYPICAL APPLICATION CIRCUIT Applications. It is necessary that an external bypass capacitor be connected between the supply and ground of the device to reduce both external noise and noise generated by the chopper-stabilization technique and ensure sufficient energy to guarantee proper programming. (A 0.1uF cap is recommended for proper fuse blowing and may reside on the programming board) The bypass capacitor in the application should be no further than 5 mm away from the Hall sensor. The bypass capacitor is to protect the Hall IC only. All high frequency interferences conducted along the supply lines will be passed directly to the load through the bypass capacitor. Therefore, the ECU must have sufficient protection other than the bypass capacitor placed in parallel with the Hall IC. A series resistor on the supply side, Rs (not shown), in combination with the bypass capacitor will create a filter for EMC pulses. The series resistor (Rs) and/or sense resistor (Rsense) will have voltage drops across them that must be considered for the minimum Vcc requirement of the device. The preferred sense resistor value is approximately 100 ohms. All programming, code and lock-bit programming, should be done directly across the part, between VCC and Output with the use of a 0.1uF bypass capacitor. Programming across the series resistor or sense resistor may not allow enough energy to properly blow the fuses. The result would be incorrect switch points. Typical Application (UA Pkg): Vcc 1 0.01uF VSupply A118X OUTPUT 2 ECU 3 Optional OUTPUT UA ONLY RSENSE Extensive applications information on magnets and Hall-effect sensors including Chopper-Stabilization is available in the Allegro Electronic Data Book CD, or at the website: http://www.allegromicro.com . Rev. 1.8 25 April 2003 Page 8 115 Northeast Cutoff, Box 15036 Worcester, Massachus etts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION – SUBJECT TO CHANGE) DEVICE QUALIFICATION PROGRAM Test Name Test Length # of Lots Sample / lot Ta = 150°C, Tj ? 170°C 408 hrs 1 77 JESD22-A108 Ta = 170°C 1000 hrs 1 77 JESD22-A103 Test Conditions Comments Pre/Post Test High Temperature Operating Life (HTOL) High Temperature Bake (HTB) Pre Conditioning (PC) Ta = room, hot, cold 85°C/85%RH 168 hrs 1 231 JESD22-A112 & A113 Temperature Humidity Bias (THB) or HAST 85°C/85%RH 130°C/85%RH 1000 hrs 50 hrs 1 77 JESD22-A101 JESD22-A110 Autoclave (AC) 121°C/15 psig -65°C to +150°C or -50°C to +150°C 1 77 JESD22-A102 1 77 JESD22-A104 Temperature Cycle (TC) 96 hrs 500 cycles 1000 cycles External Visual (EV) Physical Dimensions (PD) Lead Integrity Bond Pull Strength ESD 1 1 1 HBM & MM 1 Solderability (SD) 1 Early Life Failure Rate (ELFR) 125°C or 150°C Gate Leakage (GL) Electrical Distributions (ED) Ta = room, hot, cold 30 45 30 3 per model JESD22-A114 & A115,CDFper V step AEC-Q100-002, 003 & 011 15 JESD22-B102 48 hrs 1 800 1 6 3 30 JESD22-A108 24 hrs CDF- AEC-Q100-006 EMC Requirements (Electromagnetic Compatibility) Please contact your local representative for EMC results Test Name Reference Specification ESD – Human Body Model ESD – Machine Model Conducted Transients AEC-Q100-002 AEC-Q100-003 ISO 7637-1 Direct RF Injection ISO 11452-7 Bulk Current Injection TEM Cell ISO 11452-4 ISO 11452-3 Rev. 1.8 25 April 2003 Page 9 115 Northeast Cutoff, Box 15036 Worcester, Massachus etts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION – SUBJECT TO CHANGE) POWER DE-RATING Maximum Allowable Power Calculation for A118X Family 7: Due to internal power consumption, the junction temperature of the IC, 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: ∆T = PD * Rθja Where: PD = Vcc * Icc ∴ ∆T=Vcc * Icc * Rθja Where ∆T denotes the temperature rise resulting from the IC’s power dissipation. Assume: Ta = Tamax = 150 °C Tj(max) = 170°C Icc = IONmax = 17 mA If: Tj = Ta + ∆T Then: ∆Tmax = Tjmax – Ta max = 170 °C - 150 °C = 20 °C If: ∆T = PD * Rθja Tj = Ta + ∆T For the sensor : Tj(max) = 170°C Rθja (UA Pkg) = 206°C/W Then: PDmax = ∆Tmax / Rθja = 20 °C / 206 °C/W = 97.1 mW If: PD = Vcc * Icc Typical Tj calculation: Ta = 25 °C Vcc = 12 V Icc = IccONtyp = 14.5 mA Then the maximum Vcc at 150°C is therefore: Vccmax = PDmax / Icc = 97.1 mW / 17 mA = 5.7 V PD = Vcc * Icc = 12 V * 14.5 mA = 174 mW Tj = Ta + ∆T = 25 °C + 35.8 °C = 60.8 °C Maximum Supply Voltage vs Ambient Temperature 30 Maximum Supply Voltage (V) ∆T = PD * Rθja = 174 mW * 206°C/W = 35.8 °C Dissipation 25 20 UA (ROJA = 206°C/W) LH (ROJA = 228°C/W) 15 10 5 0 0 25 50 75 100 125 150 Temperature (°C) 7 The “LH” PPD is based on a 0.062" thick FR4, single-sided board using 2 oz. copper, with a 0.55 mm2 area of copper attached to the ground lead. Rev. 1.8 25 April 2003 Page 10 115 Northeast Cutoff, Box 15036 Worcester, Massachus etts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION – SUBJECT TO CHANGE) Rev. 1.8 25 April 2003 Page 11 115 Northeast Cutoff, Box 15036 Worcester, Massachus etts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION – SUBJECT TO CHANGE) Rev. 1.8 25 April 2003 Page 12 115 Northeast Cutoff, Box 15036 Worcester, Massachus etts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION – SUBJECT TO CHANGE) Rev. 1.8 25 April 2003 Page 13 115 Northeast Cutoff, Box 15036 Worcester, Massachus etts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc. TWO-WIRE, PROGRAMMABLE, UNIPOLAR HALL-EFFECT SWITCH FAMILY (PRELIMINARY INFORMATION – SUBJECT TO CHANGE) The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 5,442,283; 5,389,889; 5,581,179; 5,517,112; 5,619,137; 5,621,319; 5,650,719; 5,686,894; 5,694,038; 5,729,130; 5,917,320; and other patents pending. Allegro MicroSystems, Inc. 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 products are not authorized for use as critical components in life-support appliances, devices, or systems without express written approval. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties that may result from its use. Rev. 1.8 25 April 2003 Page 14 115 Northeast Cutoff, Box 15036 Worcester, Massachus etts 01615-0036 (508) 853-5000 Copyright © 1993, 1995 Allegro MicroSystems, Inc.