A1384LLHLT-T

A1381, A1383, and A1384 Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package Discontinued Product These parts are no longer in production The device should not be purchased for new design applications. Samples are no longer available. Date of status change: December 1, 2015 Recommended Substitutions: For existing customer transition, and for new customers or new applications, refer to the A1389. NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegro MicroSystems, LLC reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. A1381, A1383, and A1384 Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package Features and Benefits ▪ Customer programmable offset, sensitivity, sensitivity temperature coefficient, and polarity ▪ Programmability at end-of-line ▪ Ratiometric sensitivity, quiescent voltage output, and clamps for interfacing with application DAC ▪ Temperature-stable quiescent voltage output and sensitivity ▪ Precise recoverability after temperature cycling ▪ Output voltage clamps provide short circuit diagnostic capabilities ▪ Wide ambient temperature range: –40°C to 150°C ▪ Immune to mechanical stress ▪ Miniature package options Packages: 3-pin SOT23W (suffix LH), and 3-pin SIP (suffix UA) Description New applications for linear output Hall effect sensing, such as displacement, angular position, and current measurement, require high accuracy in conjunction with small package size. The Allegro™ A138x family of programmable linear Hall effect sensor ICs was designed specifically to achieve both goals. These temperature-stable devices are available in a miniature surface mount package (SOT23-W) and an ultramini throughhole single-in-line package. The accuracy of these devices is enhanced via programmability on the output pin for end-of-line optimization without the added complexity and cost of a fully programmable device. These ratiometric Hall effect devices provide a voltage output that is proportional to the applied magnetic field. Both the quiescent voltage output and magnetic sensitivity are useradjustable. The quiescent voltage output can be set around 50% of the supply voltage, and the sensitivity adjusted between 2 mV/G and 9 mV/G over the device family. Programming selections also exist for output polarity and temperature compensation. The features of this linear family make it ideal for high accuracy requirements of automotive and industrial applications, and operate across an extended temperature range, –40°C to 150°C. Continued on the next page… Not to scale Functional Block Diagram CBYPASS To all subcircuits Amp Filter VCC Dynamic Offset Cancellation V+ Out Hall Drive Circuit Gain Gain Temperature Coefficient Trim Control GND A1381-DS, Rev. 13 Offset VOUT (Programming) Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package A1381, A1383, and A1384 Description (continued) Each BiCMOS monolithic circuit integrates a Hall element, temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, a clamped low-impedance output stage, and a proprietary dynamic offset cancellation technique. The A138x devices are provided in a 3-pin ultramini single-in-line package (UA suffix), and a 3-pin surface mount SOT-23W package (LH suffix). Selection Guide Part Number Packing1 TA (°C) Package A1381ELHLT-T Tape and reel, 3000 pieces/reel A1381ELHLX-T Tape and reel, 10,000 pieces/reel A1381EUA-T Bulk bag, 500 pieces/bag A1381LLHLT-T Tape and reel, 3000 pieces/reel A1381ELHLX-T Tape and reel, 10,000 pieces/reel A1381LUA-T Bulk bag, 500 pieces/bag A1383ELHLT-T Tape and reel, 3000 pieces/reel A1383EUA-T Bulk bag, 500 pieces/bag A1383LLHLT-T Tape and reel, 3000 pieces/reel A1383LUA-T Bulk bag, 500 pieces/bag A1384ELHLT-T Tape and reel, 3000 pieces/reel A1384ELHLX-T Tape and reel, 10,000 pieces/reel A1384EUA-T Bulk bag, 500 pieces/bag A1384LLHLT-T Tape and reel, 3000 pieces/reel A1384ELHLX-T Tape and reel, 10,000 pieces/reel A1384LUA-T Bulk bag, 500 pieces/bag 1 Contact Allegro for additional packing options. Absolute Maximum Ratings Characteristic Forward Supply Voltage Reverse Supply Voltage Forward Output Voltage Reverse Output Voltage Output Source Current Output Sink Current Symbol VCC VRCC VOUT VROUT IOUT(SOURCE) IOUT(SINK) Operating Ambient Temperature TA Storage Temperature Maximum Junction Temperature Tstg TJ(max) Surface mount Surface mount Through hole Surface mount Surface mount Through hole Surface mount Through hole Surface mount Through hole Surface mount Surface mount Through hole Surface mount Surface mount Through hole Internal Bandwidth (kHz) Sensitivity Range (mV/G) 12 6.00 to 9.00 21 2.75 to 4.25 27 2.00 to 3.00 –40 to 85 –40 to 150 –40 to 85 –40 to 150 –40 to 85 –40 to 150 Notes VOUT to GND VCC to VOUT Range E Range L Rating 8 –0.1 28 –0.1 2 10 –40 to 85 –40 to 150 –65 to 165 165 Units V V V V mA mA ºC ºC ºC ºC Pin-out Diagrams LH Package UA Package 3 1 2 1 2 Number Name Description LH UA 1 1 VCC Input power supply; use bypass capacitor to connect to ground 3 2 GND Ground 2 3 VOUT Output signal; also used for programming 3 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 2 A1381, A1383, and A1384 Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package OPERATING CHARACTERISTICS, valid over full operating temperature range, TA; CBYPASS= 0.1 µF, VCC = 5 V, unless otherwise specified Characteristic Symbol Test Conditions Min. Typ. Max. Units 4.5 5.0 5.5 V – 6.9 8 mA ELECTRICAL CHARACTERISTICS Supply Voltage VCC Supply Current ICC Power-On Time1 tPO No load on VOUT A1381 TA = 25 °C, CBYPASS = open, CL (of test probe) = 10 pF, Sens = 7.5 mV/G – 32 – µs A1382 TA = 25 °C, CBYPASS = open, CL (of test probe) = 10 pF, Sens = 5.0 mV/G – 27 – µs A1383 TA = 25 °C, CBYPASS = open, CL (of test probe) = 10 pF, Sens = 3.125 mV/G – 23 – µs A1384 TA = 25 °C, CBYPASS = open, CL (of test probe) = 10 pF, Sens = 2.5 mV/G – 19 – µs Delay to Clamp1 tCLP TA = 25°C, CL = 10 nF – 30 – µs Supply Zener Clamp Voltage VZ TA = 25°C, ICC = 11 mA 6 8.3 – V A1381 – 12 – kHz A1382 – 17 – kHz Internal Bandwidth Chopping Frequency2 BWi fC A1383 Small signal –3 dB – 21 – kHz A1384 – 27 – kHz TA = 25°C – 170 – kHz OUTPUT CHARACTERISTICS Noise (peak to peak) DC Output Resistance VN(p-p) A1381 TA=25°C; CL = 10 nF, Sens = 7.5 mV/G; no external filter – 34 – mV A1382 TA=25°C; CL = 10 nF, Sens = 5.0 mV/G; no external filter – 27 – mV A1383 TA=25°C; CL = 10 nF, Sens = 3.125 mV/G; no external filter – 20 – mV A1384 TA=25°C; CL = 10 nF, Sens = 2.5 mV/G; no external filter – 18 – mV A138x TA=25°C; Sens = 2.5 mV/G; external 2 kHz low pass filter with R = 1.69 kΩ, C = 47 nF – 4.7 – mV ROUT – |BPOS1| and |BNEG2| > |BNEG1|. Then: SensBx = LinERR = max( |LinERRPOS | , |LinERRNEG | ) . (11) Symmetry Sensitivity Error The magnetic sensitivity of an A138x device is constant for any two applied magnetic fields of equal magnitude and opposite polarities. Symmetry error, SymERR (%), is measured and defined as:  SensBPOS SymERR = 1–  SensBNEG   × 100%  , (12) where SensBx is as defined in equation 10, and BPOS and BNEG are positive and negative magnetic fields such that |BPOS| = |BNEG|. Ratiometry Error The A138x devices feature ratiometric output. This means that the quiescent voltage output, VOUT(Q) , magnetic sensitivity, Sens, and clamp voltage, VCLP(HIGH) and VCLP(LOW), are proportional to the supply voltage, VCC. In other words, when the supply voltage increases or decreases by a certain percentage, each characteristic also increases or decreases by the same percentage. Error is the difference between the measured change in the supply voltage relative to 5 V, and the measured change in each characteristic. The ratiometric error in quiescent voltage output, RatERRVOUT(Q) (%), for a given supply voltage, VCC, is defined as:  VOUT(Q)(VCC) / VOUT(Q)(5V)   × 100% . (13) RatERRVOUT(Q) = 1– VCC / 5 V   The ratiometric error in magnetic sensitivity, RatERRSens (%), for a given supply voltage, VCC, is defined as:  Sens(VCC) / Sens(5V)   × 100% RatERRSens = 1– VCC / 5 V   . (14) The ratiometric error in the clamp voltages, RatERRCLP (%), for a given supply voltage, VCC, is defined as:  VCLP(VCC) / VCLP(5V)   × 100% RatERRCLP = 1– VCC / 5 V   . (15) where VCLP is either VCLP(HIGH) or VCLP(LOW). Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 9 Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package Typical Application Drawing V+ VCC VOUT CL CBYPASS GND Chopper Stabilization Technique at base band, while the DC offset becomes a high-frequency signal. The magnetic-sourced signal then can pass through a low-pass filter, while the modulated DC offset is suppressed. The chopper stabilization technique uses a 170 kHz high frequency clock. For the demodulation process, a sample and hold technique is used, where the sampling is performed at twice the chopper frequency (340 kHz). This high-frequency operation allows a greater sampling rate, which results in higher accuracy and faster signal-processing capability. This approach desensitizes the chip to the effects of thermal and mechanical stresses, and produces devices that have extremely stable quiescent Hall output voltages and Precise recoverability after temperature cycling. This technique is made possible through the use of a BiCMOS process, which allows the use of low-offset, low-noise amplifiers in combination with high-density logic integration and sampleand-hold circuits. Regulator Clock/Logic Hall Element Amp Sample and Hold A1381, A1383, and A1384 Low-Pass Filter Concept of Chopper Stabilization Technique 10 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package A1381, A1383, and A1384 Programming Guidelines Overview Definition of Terms Programming is accomplished by sending a series of input voltage pulses serially through the VOUT pin of the device. A unique combination of different voltage level pulses controls the internal programming logic of the device to select a desired programmable parameter and change its value. There are two programming pulses, referred to as a high voltage pulse, VPH, consisting of a VP(LOW) –VP(HIGH) –VP(LOW) sequence and a mid voltage pulse, VPM, consisting of a VP(LOW) –VP(MID) –VP(LOW) sequence. Register. The section of the programming logic that controls the choice of programmable modes and parameters. The 138x features Try mode, Blow mode, and Lock mode: • In Try mode, the value of a single programmable parameter may be set and measured. The parameter value is stored temporarily, and resets after cycling the supply voltage. Note that other parameters cannot be accessed simultaneously in this mode. • In Blow mode, the value of a single programmable parameter may be permanently set by blowing solid-state fuses internal to the device. Additional parameters may be blown sequentially. • In Lock mode, a device-level fuse is blown, blocking the further programming of all parameters. The programming sequence is designed to help prevent the device from being programmed accidentally; for example, as a result of noise on the supply line. Although any programmable variable power supply can be used to generate the pulse waveforms, Allegro highly recommends using the Allegro Sensor IC Evaluation Kit, available on the Allegro Web site On-line Store. The manual for that kit is available for download free of charge, and provides additional information on programming these devices. Bit Field. The internal fuses unique to each register, represented as a binary number. Incrementing the bit field of a particular register causes its programmable parameter to change, based on the internal programming logic. Key. A series of VPM voltage pulses used to select a register, with a value expressed as the decimal equivalent of the binary value. The LSB of a register is denoted as key 1, or bit 0. Code. The number used to identify the combination of fuses activated in a bit field, expressed as the decimal equivalent of the binary value. The LSB of a bit field is denoted as code 1, or bit 0. Addressing. Incrementing the bit field code of a selected register by serially applying a pulse train through the VOUT pin of the device. Each parameter can be measured during the addressing process, but the internal fuses must be blown before the programming code (and parameter value) becomes permanent. Fuse Blowing. Applying a VPH voltage pulse of sufficient duration at the VP(HIGH) level to permanently set an addressed bit by blowing a fuse internal to the device. Once a bit (fuse) has been blown, it cannot be reset. Blow Pulse. A VPH voltage pulse of sufficient duration at the VP(HIGH) level to blow the addressed fuse. Cycling the Supply. Powering-down, and then powering-up the supply voltage. Cycling the supply is used to clear the programming settings in Try mode. Programming Pulse Requirements, Protocol at TA = 25°C Characteristic Symbol Notes Min. Typ. Max. Units VP(LOW) Programming Voltage - - 5.5 V 14 15 16 V 26 27 28 V Minimum supply current required to ensure proper fuse blowing. In addition, a minimum capacitance, CBLOW = 0.1 µF, must be connected between the VOUT and GND pins during programming to provide the current necessary for fuse blowing. 300 - - mA tOFF(HIGH) Duration at VP(LOW) level following a VP(HIGH) level. 30 - - µs tOFF(MID) Duration at VP(LOW) level following a VP(MID) level. 5 - - µs VP(MID) Measured at the VOUT pin. VP(HIGH) Programming Current Pulse Width IP tACTIVE(HIGH) Duration of VP(HIGH) level for VPH pulses during key/code selection. 30 - - µs tACTIVE(MID) Duration of VP(MID) level for VPH pulses during key/code selection. 15 - - µs tBLOW Duration at VP(HIGH) level for fuse blowing. 30 - - µs Pulse Rise Time tPr Rise time required for transitions from VP(LOW) to either VP(MID) or VP(HIGH). 1 - 100 µs Pulse Fall Time tPf Fall time required for transitions from VP(HIGH) to either VP(MID) to VP(LOW). 1 - 100 µs 11 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package A1381, A1383, and A1384 Programming Procedures Parameter Selection Each programmable parameter can be accessed through a specific register. To select a register, a sequence of voltage pulses consisting of a VPH pulse, a series of VPM pulses, and a VPH pulse (with no VCC supply interruptions) must be applied serially to the VOUT pin. The number of VPM pulses is called the key, and uniquely identifies each register. The pulse train used for selection of the first register, key 1, is shown in figure 1. V+ VP(HIGH) After a programmable parameter has been selected, a VPH pulse transitions the programming logic into the bit field addressing state. Applying a series of VPM pulses to the VOUT pin of the device, as shown in figure 2, increments the bit field of the selected parameter. VP(LOW) tLOW tACTIVE 0 Code 2n – 1 Code 2 Code 1 V+ Code 2n – 2 Figure 1. Parameter selection pulse train. This shows the sequence for selecting the register corresponding to key 1, indicated by a single VPM pulse. VP(MID) • Register 1: Quiescent voltage output, VOUT(Q) • Register 2: Sensitivity, Sens • Register 3: Sensitivity temperature coefficient, TCSens Polarity, POL Overall device locking, LOCK Bit Field Addressing VP(MID) VP(HIGH) The A138x has three registers that select among the five programmable parameters: When addressing the bit field, the number of VPM pulses is represented by a decimal number called a code. Addressing activates the corresponding fuse locations in the given bit field by incrementing the binary value of an internal DAC. The value of the bit field (and code) increments by one with the falling edge of each VPM pulse, up to the maximum possible code (see the Programming Logic table). As the value of the bit field code increases, the value of the programmable parameter changes. Measurements can be taken after each pulse to determine if the desired result for the programmable parameter has been reached. Cycling the supply voltage resets all the locations in the bit field that have unblown fuses to their initial states. Fuse Blowing VP(LOW) 0 Figure 2. Bit field addressing pulse train. Addressing the bit field by incrementing the code causes the programmable parameter value to change. The number of bits available for a given programming code, n, varies among parameters; for example, the bit field for VOUT(Q) has 6 bits available, which allows 63 separate codes to be used. After the required code is found for a given parameter, its value can be set permanently by blowing individual fuses in the appropriate register bit field. Blowing is accomplished by applying a VPH pulse, called a blow pulse, of sufficient duration at the VP(HIGH) level to permanently set an addressed bit by blowing a fuse internal to the device. Due to power requirements, the fuse for each bit in the bit field must be blown individually. To accomplish this, the code representing the desired parameter value must be translated to a binary number. For example, as shown 12 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package A1381, A1383, and A1384 in figure 3, decimal code 5 is equivalent to the binary number 101. Therefore bit 2 (code 4) must be addressed and blown, the device power supply cycled, and then bit 0 (code 1) addressed and blown. An appropriate sequence for blowing code 5 is shown in figure 4. The order of blowing bits, however, is not important. Blowing bit 0 first, and then bit 2 is acceptable. Locking the Device Note: After blowing, the programming is not reversible, even after cycling the supply power. Although a register bit field fuse cannot be reset after it is blown, additional bits within the same register can be blown at any time until the device is locked. For example, if bit 1 (binary 10) has been blown, it is still possible to blow bit 0. The end result would be binary 11 (decimal code 3). The additional guidelines in this section should be followed to ensure the proper behavior of these devices: After the desired code for each parameter is programmed, the device can be locked to prevent further programming of any parameters. Additional Guidelines • A 0.1 µF blowing capacitor, CBLOW, must be mounted between the VOUT pin and the GND pin during programming, to ensure enough current is available to blow fuses. • The CBLOW blowing capacitor must be replaced in the final application with a suitable CL. (The maximum load capacitance is 10 nF for proper operation.) Bit Field Selection Address Code Format (Decimal Equivalent) Code 5 Code in Binary (Binary) 1 0 1 Fuse Blowing Target Bits Bit 2 Fuse Blowing Address Code Format • The power supply used for programming must be capable of delivering at least 26 V and 300 mA. • Be careful to observe the tLOW delay time before powering down the device after blowing each bit. • The following programming order is recommended: Bit 0 1. POL 2. TCSENS 3. Sens 4. VOUT(Q) 5. LOCK (only after all other parameters have been programmed and validated, because this prevents any further programming of the device) Code 4 Code 1 (Decimal Equivalents) Figure 3. Example of code 5 broken into its binary components, which are code 4 and code 1. V+ VP(HIGH) VP(MID) VP(LOW) Register Selection (Key 1) 0 VCC = 0 V Addressing (Code 4) Register Selection (Key 1) Blow (Code 4 in Key 1) tBLOW VCC = 0 V Blow (Code 1 in Key 1) Addressing (Code 1) VCC = 0 V Programming of Code 5 in Key 1 Figure 4. Example of programming pulses applied to the VOUT pin that result in permanent parameter settings. In this example, the register corresponding to key 1 is selected and code 5 is addressed and blown. 13 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com A1381, A1383, and A1384 Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package Programming Modes Try Mode Try mode allows a single programmable parameter to be tested without permanently setting its value. Multiple parameters cannot be tested simultaneously in this mode. After powering the VCC supply, select the desired parameter register and address its bit field. When addressing the bit field, each VPM pulse increments the value of the parameter register, up to the maximum possible code (see Programming Logic table). The addressed parameter value remains stored in the device even after the programming drive voltage is removed from the VOUT pin, allowing the value to be measured. Note that for accurate time measurements, the blow capacitor, CBLOW, should be removed during output voltage measurement. It is not possible to decrement the value of the register without resetting the parameter bit field. To reset the bit field, and thus the value of the programmable parameter, cycle the supply (VCC) voltage. Blow Mode After the required value of the programmable parameter is found using Try mode, its corresponding code should be blown to make its value permanent. To do this, select the required parameter register, and address and blow each required bit separately (as described in the Fuse Blowing section). The supply must be cycled between blowing each bit of a given code. After a bit is blown, cycling the supply will not reset its value. Lock Mode To lock the device, address the LOCK bit and apply a blow pulse with CBLOW in place. After locking the device, no future programming of any parameter is possible. 14 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com A1381, A1383, and A1384 Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package Programming State Machine Power-Up VPM Initial VPH Parameter Selection VPH VPM SENS VPM VOUT(Q) VPM TCSENS, POL, LOCK VPM 2n – 1 n = total bits in register VPM VPH Bit Field Addressing VPM 1 VPM VPM 2 VPH VPM = VP(LOW) –VP(MID) –VP(LOW) VPH = VP(LOW) –VP(HIGH) –VP(LOW) Fuse Blowing User Power-Down Required Initial State After system power-up, the programming logic is reset to a known state. This is referred to as the Initial state. All the bit field locations that have intact fuses are set to logic 0. While in the Initial state, any VPM pulses on the VOUT pin are ignored. To enter the Parameter Selection state, apply one VPH pulse on the VOUT pin. Parameter Selection State This state allows the selection of the parameter register containing the bit fields to be programmed. To select a parameter register, increment through the keys by applying VPM pulses on the VOUT pin. Register keys select among the following programming parameters: • 1 pulse - Sens • 2 pulses - VOUT(Q) • 3 pulses - TCSENS, POL, and LOCK To enter the Bit Field Addressing state, apply one VPH pulse on the VOUT pin. Bit Field Addressing State This state allows the selection of the individual bit fields to be programmed in the selected parameter register (see Programming Logic table). To leave this state, either cycle device power or blow the fuses for the selected code. Note that merely addressing the bit field does not permanently set the value of the selected programming parameter; fuses must be blown to do so. Fuse Blowing State To blow an addressed bit field, apply a VPH pulse on the VOUT pin. Power to the device should then be cycled before additional programming is attempted. Note: Each bit representing a decimal code must be blown individually (see the Fuse Blowing section). 15 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com A1381, A1383, and A1384 Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package Programming Logic Table Programmable Parameter (Register Key) Sens (1) VOUT(Q) (2) TCSENS , POL, LOCK (3) Bit Field Address Binary Format [MSB → LSB] Decimal Equivalent Code 000000 0 Description Initial value (Sensinit) 111111 63 Maximum value of sensitivity (Sens) in range 000000 0 Initial value (VOUT(Q)init) 111111 63 Maximum value of quiescent voltage output (VOUT(Q)) in range; B = 0 G 000000 0 Initial value of sensitivity temperature coefficient range (TCSensinit) 000111 7 Maximum value of sensitivity temperature coefficient (TCSens) in range 001000 8 POL bit, switches polarity (causes VOUT to increase with a negative [north polarity] field applied to the branded face of the device) 010000 16 LOCK bit, enables permanent locking of all programming bit fields in the device 16 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package A1381, A1383, and A1384 Package LH, 3 Pin; (SOT-23W) +0.12 2.98 –0.08 1.49 D 4°±4° 3 A +0.020 0.180–0.053 0.96 D +0.10 2.90 –0.20 +0.19 1.91 –0.06 2.40 0.70 D 0.25 MIN 1.00 2 1 0.55 REF 0.25 BSC 0.95 Seating Plane Gauge Plane 8X 10° REF B PCB Layout Reference View Branded Face 1.00 ±0.13 0.95 BSC +0.10 0.05 –0.05 0.40 ±0.10 For Reference Only; not for tooling use (reference dwg. 802840) Dimensions in millimeters Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown A Active Area Depth, 0.28 mm REF B Reference land pattern layout All pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary to meet application process requirements and PCB layout tolerances C Branding scale and appearance at supplier discretion D Hall element, not to scale NNT 1 C Standard Branding Reference View N = Last two digits of device part number T = Temperature code 17 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package A1381, A1383, and A1384 Package UA, 3-Pin SIP +0.08 4.09 –0.05 45° B E C 2.04 1.52 ±0.05 +0.08 3.02 –0.05 1.44 E 10° Mold Ejector Pin Indent E Branded Face A 1.02 MAX 45° 0.79 REF NNN 1 1 2 D Standard Branding Reference View 3 = Supplier emblem N = Last three digits of device part number +0.03 0.41 –0.06 14.99 ±0.25 +0.05 0.43 –0.07 For Reference Only; not for tooling use (reference DWG-9065) Dimensions in millimeters Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown A Dambar removal protrusion (6X) B Gate and tie bar burr area C Active Area Depth, 0.50 mm REF D Branding scale and appearance at supplier discretion E Hall element (not to scale) 1.27 NOM 18 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Programmable Linear Hall Effect Sensor ICs with Analog Output Available in a Miniature Thin Profile Surface Mount Package A1381, A1383, and A1384 Revision History Revision Revision Date 12 December 3, 2013 Updated product availability Description of Revision 13 December 1, 2015 Product status changed to “Discontinued” Copyright ©2009-2015, Allegro MicroSystems, LLC Allegro MicroSystems, LLC 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, LLC assumes no responsibility for its use; nor for any infringement of patents or other rights of third parties which may result from its use. For the latest version of this document, visit our website: www.allegromicro.com 19 Allegro MicroSystems, LLC 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com