A1321LLH

A1321 ALLEGRO | Alldatasheet

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A1321-DS Rev. 3 Worcester, Massachusetts 01615-0036 (508) 853-5000

115 Northeast Cutoff, Box 15036

www.allegromicro.com Allegro MicroSystems, Inc. AB SO LUTE MAX I MUM RAT INGS Operating Temperature Ambient, T *Additional current draw may be observed at voltages above the minimum supply Zener clamp voltage, VZ(min), due to the Zener diode turning on. Temperature-stable quiescent output voltage Precise recoverability after temperature cycling Output voltage proportional to magnetic fl ux density Ratiometric rail-to-rail output The A132X family of linear Hall-effect sensors are optimized, sensitive, and tem- perature-stable. These ratiometric Hall-effect sensors provide a voltage output that is proportional to the applied magnetic fi eld. The A132X family has a quiescent output voltage that is 50% of the supply voltage and output sensitivity options of 2.5mV/G, 3.125mV/G, and 5mV/G. The features of this family of devices are ideal for use in the harsh environments found in automotive and industrial linear and rotary position sensing systems. Each device has a BiCMOS monolithic circuit which integrates a Hall element, improved temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifi er, and a rail-to-rail low- impedance output stage. A proprietary dynamic offset cancellation technique, with an internal high-fre- quency clock, reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The high frequency clock allows for a greater sampling rate, which results in higher accuracy and faster signal processing capability. This technique produces devices that have an extremely stable quiescent output voltage, are immune to mechanical stress, and have precise recoverability after temperature cycling. Having the Hall element and an amplifi er on a single chip minimizes many problems normally associated with low-level analog signals. Output precision is obtained by internal gain and offset trim adjustments made at end-of-line during the manufacturing process. The A132X family is provided in a 3-pin single in-line package (UA) and a 3-pin surface mount package (LH). Ratiometric Linear Hall Effect Sensor for High-Temperature Operation Use the following complete part numbers when ordering: Package UA, 3-pin SIP Features and Benefi ts Improved sensitivity 4.5 to 5.5 V operation Immunity to mechanical stress Solid-state reliability Robust EMC protection Package LH, 3-pin Surface Mount Part Number Package Ambient Sensitivity, Typ. A1321EUA SIP –40ºC to 85ºC 5.000 mV/GA1321ELH Surface Mount A1321LUA SIP –40ºC to 150ºCA1321LLH Surface Mount A1322EUA SIP –40ºC to 85ºC 3.125 mV/GA1322ELH Surface Mount A1322LUA SIP –40ºC to 150ºCA1322LLH Surface Mount A1323EUA SIP –40ºC to 85ºC 2.500 mV/GA1323ELH Surface Mount A1323LUA SIP –40ºC to 150ºCA1323LLH Surface Mount 1. VCC 2. GND 3. VOUT 1. VCC 2. VOUT 3. GND

A1321-DS Rev. 3 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Allegro MicroSystems, Inc. Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321/A1322/A1323 Functional Block Diagram Amp GND VOUT VCC Out Offset Trim Control Gain 0.1 µF Dynamic Offset Cancellation Filter Terminal List Symbol Description Number Package LH Package UA VCC Connects power supply to chip 1 1 VOUT Output from circuit 2 3 GND Ground 3 2

A1321-DS Rev. 3 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Allegro MicroSystems, Inc. Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321/A1322/A1323 DEVICE CHARACTERISTICS1 over operating temperature (TA) range, unless otherwise noted Characteristic Symbol Test Conditions Min. Typ. 2 Max. Units Electrical Characteristics; VCC = 5 V, unless otherwise noted Supply Voltage V cc(op) Operating; Tj < 165°C 4.5 5.0 5.5 V Supply Current I cc B = 0, Iout = 0 – 5.6 8 mA Quiescent Voltage V out(q) B = 0, TA = 25ºC, Iout = 1 mA 2.425 2.5 2.575 V Output Voltage3 Vout(H) B = +X, Iout = –1 mA – 4.7 – V Vout(L) B = –X, Iout = 1 mA – 0.2 – V Output Source Current Limit3 Iout(LM) B = –X, Vout → 0 –1.0 –1.5 – mA Supply Zener Clamp Voltage V Z Icc = 11 mA = Icc(max) + 3 6 8.3 – V Output Bandwidth BW – 30 – kHz Clock Frequency f C – 150 – kHz Output Characteristics; over VCC range, unless otherwise noted Noise, Peak-to-Peak4 VN A1321; Cbypass = 0.1 µF, no load – – 40 mV A1322; Cbypass = 0.1 µF, no load – – 25 mV A1323; Cbypass = 0.1 µF, no load – – 20 mV Output Resistance R out Iout ≤ ±1 mA – 1.5 3 Ω Output Load Resistance R L Iout ≤ ±1 mA, VOUT to GND 4.7 – – k Ω Output Load Capacitance C L VOUT to GND – – 10 nF 1 Negative current is defi ned as conventional current coming out of (sourced from) the specifi ed device terminal. 2 Typical data is at TA = 25°C. They are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for individual units, within the specifi ed maximum and minimum limits. 3 In these tests, the vector X is intended to represent positive and negative fi elds suffi cient to swing the output driver between fully OFF and saturated (ON), respectively. It is NOT intended to indicate a range of linear operation. 4 Noise specifi cation includes both digital and analog noise.

A1321-DS Rev. 3 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Allegro MicroSystems, Inc. Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321/A1322/A1323 MAGNETIC CHARACTERISTICS1,2 over operating temperature range, TA; VCC = 5 V, Iout = –1 mA; unless otherwise noted Characteristics Symbol Test Condition Min Typ 3 Max Units 4 Sensitivity5 Sens A1321; TA = 25ºC 4.750 5.000 5.250 mV/G A1322; TA = 25ºC 2.969 3.125 3.281 mV/G A1323; TA = 25ºC 2.375 2.500 2.625 mV/G Delta Vout(q) as a func- tion of temperature Vout(q)(∆T) Defi ned in terms of magnetic fl ux density, B – – ±10 G Ratiometry, Vout(q) Vout(q)(∆V) – – ±1.5 % Ratiometry, Sens ∆Sens(∆V) – – ±1.5 % Positive Linearity Lin+ – – ±1.5 % Negative Linearity Lin– – – ±1.5 % Symmetry Sym – – ±1.5 % Delta Sens at T A = max5 ∆Sens(TAmax) From hot to room temperature –2.5 – 7.5 % Delta Sens at TA = min5 ∆Sens(TAmin) From cold to room temperature –6 – 4 % Sensitivity Drift6 SensDrift TA = 25°C; after temperature cycling and over time – 1 2 % Delta Sens at T A = max5 ∆Sens(TAmax) From hot to room temperature –5 – 5 % Delta Sens at TA = min5 ∆Sens(TAmin) From cold to room temperature –3.5 – 8.5 % Sensitivity Drift6 SensDrift TA = 25°C; after temperature cycling and over time – 0.328 2 % 1 Additional information on chracteristics is provided in the section Characteristics Defi nitions, on the next page. 2 Negative current is defi ned as conventional current coming out of (sourced from) the specifi ed device terminal. 3 Typical data is at TA = 25°C, except for ∆Sens, and at x.x Sens. Typical data are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for individual units, within the specifi ed maximum and minimum limits. In addition, the typical values vary with gain. 4 10 G = 1 millitesla. 5 After 150ºC pre-bake and factory programming. 6 Sensitivity drift is the amount of recovery with time.

A1321-DS Rev. 3 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Allegro MicroSystems, Inc. Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321/A1322/A1323 Characteristic Defi nitions Quiescent Voltage Output. In the quiescent state (no magnetic fi eld), the output equals one half of the supply voltage over the operating voltage range and the operating temperature range. Due to internal component tolerances and thermal con- siderations, there is a tolerance on the quiescent voltage output both as a function of supply voltage and as a function of ambient temperature. For purposes of specifi cation, the quiescent voltage output as a function of temperature is defi ned in terms of mag- netic fl ux density, B, as: This calculation yields the device’s equivalent accuracy, over the operating temperature range, in gauss (G). Sensitivity. The presence of a south-pole magnetic fi eld per- pendicular to the package face (the branded surface) increases the output voltage from its quiescent value toward the supply voltage rail by an amount proportional to the magnetic fi eld applied. Conversely, the application of a north pole will decrease the output voltage from its quiescent value. This proportionality is specifi ed as the sensitivity of the device and is defi ned as: The stability of sensitivity as a function of temperature is defi ned as: Ratiometric. The A132X family features a ratiometric output. The quiescent voltage output and sensitivity are proportional to the supply voltage (ratiometric). The percent ratiometric change in the quiescent voltage output is defi ned as: and the percent ratiometric change in sensitivity is defi ned as: Linearity and Symmetry. The on-chip output stage is designed to provide a linear output with a supply voltage of 5 V . Although application of very high magnetic fi elds will not damage these devices, it will force the output into a non-linear region. Linearity in percent is measured and defi ned as: and output symmetry as: ∆Vout(q)(∆Τ) ∆Vout(q)(ΤΑ) ∆Vout(q)(25ºC) Sens(25ºC) = (1) ∆Vout(–B) ∆Vout(+B) Sens ∆Sens(∆Τ) Sens(ΤΑ) Sens(25ºC) Sens(25ºC) = × 100% (2) (3) VCC ÷5V ∆Vout(q)(VCC) ∆Vout(q)(5V) ∆Vout(q)(∆V) = × 100% (4) VCC ÷5V = × 100%∆Sens(∆V) ∆Sens(VCC) ∆Sens(5V) (5) = × 100%Lin+ ∆Vout(+B) 2(∆Vout(+B / 2)–V out(q) ) ∆Vout(q) (6) = × 100%Lin– ∆Vout(–B) 2(∆Vout(–B / 2)–V out(q) ) ∆Vout(q) (7) = × 100%Sym ∆Vout(+B) ∆Vout(q) –V out(–B) ∆Vout(q) (8)

A1321-DS Rev. 3 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Allegro MicroSystems, Inc. Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321/A1322/A1323 Typical Characteristics (30 pieces, 3 fabrication lots) Average Supply Current (ICC) vs Temperature Vcc =5V 0.5 1.5 2.5 3.5 4.5 5.5 6.5 7.5 -40 -20 115 125 150 TA (°C) ICC (mA) Average Positive Linearity (Lin+) vs Temperature Vcc =5V 100 101 102 103 104 105 -40 -20 115 125 150 TA (°C) Lin+ (%) Average Negative Linearity (Lin–) vs Temperature Vcc =5V 100 101 102 103 104 105 -40 -20 115 125 150 TA (°C) Lin– (%) Average Ratiometry, VOUT(q)(∆V) vs Temperature 99.2 99.4 99.6 99.8 100 100.2 100.4 100.6 100.8 101 -40 -20 115 125 150 TA (°C) Ratiometry (%) 4.5 to 5.0 V 5.5 to 5.0 V Average Ratiometry,∆Sens(∆V), vs Temperature 99.2 99.4 99.6 99.8 100 100.2 100.4 100.6 100.8 101 -40 -20 115 125 150 TA (°C) Ratiometry (%) 4.5 to 5.0V 5.5 to 5.0V Continued on the next page...

A1321-DS Rev. 3 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Allegro MicroSystems, Inc. Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321/A1322/A1323 Typical Characteristics, continued (30 pieces, 3 fabrication lots) Average Absolute Quiescent Output Voltage, Vout(q),v sT e m p e r a t u r e Vcc =5V 2.425 2.45 2.475 2.5 2.525 2.55 2.575 -40 -20 115 125 150 TA (°C) Vout(q) (V) Average Absolute Sensitivity, Sens, vs Temperature Vcc =5V 2.5 3.5 4.5 5.5 -40 -20 115 125 150 TA (°C) Sens (mV/G) A1322 A1321 A1323 Average Delta Quiescent Output Voltage, Vout(q)(∆T), vs Temperature ∆ in readings at each temperature are relative to 25°C Vcc =5V -10 -40 -20 115 125 150 TA (°C) Vout(q)(∆T) (G) Quiescent Output Voltage, Vout(q),v sVcc TA =2 5 ° C 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 2.9 4.5 5 5.5 Vcc (V) Vout(q) (V) 1321 1322 1323 Average Sensitivity, Sens, vs Vcc TA =2 5 ° C 1.5 2.5 3.5 4.5 5.5 4.5 5 5.5 Vcc (V) Sens (mV/G) 1321 1322 1323 Average Delta Sensitivity,∆Sens, vs Temperature ∆ in readings at each temperature are relative to 25°C Vcc =5V -10 -40 -20 115 125 150 TA (°C) ∆Sens (%)

A1321-DS Rev. 3 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Allegro MicroSystems, Inc. Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321/A1322/A1323 Package LH, 3-Pin; (SOT-23W) 2.40 BSC .094 1.00 BSC .039 0.70 BSC .028 3.10 2.90 .122 .114 2.10 1.85 .083 .073 3.00 2.70 .118 .106 0.55 REF .022 1.49 NOM .059 0.28 NOM .011 0.96 NOM .038 0.95 BSC .037 0.95 BSC .037 0.25 MIN .010 0.15 0.00 .006 .000 1.13 0.87 .045 .034 0.20 0.13 .008 .005 0.50 .020 .0120.30 0.25 BSC .010 Gauge Plane Seating Plane Dimensions in millimeters U.S. Customary dimensions (in.) in brackets, for reference only A Hall element B Active Area Depth 0.28 [.011] C C Fits SC–59A Solder Pad Layout A Package UA, 3-Pin; (TO-92) B .164 .159 4.17 4.04 .122 .117 3.10 2.97 .062 .058 1.57 1.47 .017 .014 0.44 0.35 .019 .014 0.48 0.36 .640 .600 16.26 15.24 .085 MAX 2.16 .050 BSC 1.27 .031 REF 0.79 .0195 NOM 0.50 .0805 NOM 2.04 1.44.0565 NOM 45° BSC 45° BSC Dimensions in inches Metric dimensions (mm) in brackets, for reference only 231 A A B Dambar removal protrusion Hall element

A1321-DS Rev. 3 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com Allegro MicroSystems, Inc. Ratiometric Linear Hall Effect Sensor for High-Temperature Operation A1321/A1322/A1323 The products described herein are manufactured under one or more of the following U.S. patents: 5,045,920; 5,264,783; 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 de par tures from the detail spec i fi ca tions as may be required to permit improvements in the per for mance, 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 compo- nents in life-support devices or sys tems without express written approval. The in for ma tion in clud ed herein is believed to be ac cu rate and reliable. How ev er, Allegro MicroSystems, Inc. assumes no re spon - si bil i ty for its use; nor for any in fringe ment of patents or other rights of third parties which may result from its use. Copyright © 2004, Allegro MicroSystems, Inc.