3517

3517 ALLEGRO

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NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegro MicroSystems, Inc. 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, Inc. assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use. Recommended Substitutions: Ratiometric, Linear Hall-Effect Sensors for High-Temperature Operation A3517 and A3518 For new customers or new applications:

• for the A3517, please refer to the Allegro A1321, and
• for the A3518, please refer to the Allegro A1323. For existing programs only:
• for the A3517, please refer to the Allegro A3515 A3517LUA is replaced by the A3515LUA A3517SUA is replaced by the A3515EUA
• for the A3518, please refer to the Allegro A3516 A3518LUA is replaced by the A3516LUA A3518SUA is replaced by the A3516EUA Date of status change: May 2, 2005 Deadline for receipt of LAST TIME BUY orders: December 31, 2005 These parts are in production but have been determined to be LAST TIME BUY . This classification indicates that the product is obsolete and notice has been given. Sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because of obsolescence in the near future. Samples are no longer available. Last Time Buy

The A3517xUA and A3518xUA are sensitive, temperature-stable linear Hall-effect sensors with greatly improved offset characteristics. Ratiometric, linear Hall-effect sensors provide a voltage output that is proportional to the applied magnetic field and have a quiescent output voltage that is approxi- mately 50% of the supply voltage. These magnetic sensors are ideal for use in linear and rotary position sensing systems in the harsh environments of automotive and industrial applications over extended temperatures to -40°C and +150°C. The A3517xUA features an output sensitivity of 5 mV/G while the A3518xUA has an output sensitivity of 2.5 mV/G. See the Magnetic Characteristics table for complete, individual device parametrics. Each BiCMOS monolithic circuit integrates a Hall element, improved temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, and a rail-to-rail low- impedance output stage. A proprietary dynamic offset cancelation technique, with an internal high- frequency clock, reduces the residual offset voltage, which is normally caused by device overmolding, temperature dependancies, and thermal stress. This technique produces devices that have an extremely stable quiescent output voltage, are immune to mechanical stress, and have precise recoverability after temperature cycling. Many problems normally associated with low-level analog signals are minimized by having the Hall element and amplifier in a single chip. Output precision is obtained by internal gain and offset trim adjustments during the manufacturing process. These reduced-cost devices are supplied in a 3-pin ultra-mini-SIP “UA” package only.

FEATURES

I Temperature-Stable Quiescent Output Voltage I Precise Recoverability After Temperature Cycling I Output Voltage Proportional to Applied Magnetic Field I Ratiometric Rail-to-Rail Output I Improved Sensitivity I 4.5 V to 5.5 V Operation I Immune to Mechanical Stress I Small Package Size I Solid-State Reliability Always order by complete part number, e.g., A3517SUA . RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION Dwg. PH-006 SUPPLY V CC GROUND OUTPUT X Data Sheet27501.11A* Pinning is shown viewed from branded side. ABSOLUTE MAXIMUM RATINGS Package Power Dissipation, Operating Temperature Range*, TA Storage Temperature Range, * Infrequent excursions permitted; see Applications Information.

3517 AND

3517 AND 3518

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP . OPERATION

115 Northeast Cutoff, Box 15036

Worcester, Massachusetts 01615-0036 (508) 853-50002 FUNCTIONAL BLOCK DIAGRAM Dwg. FH-016A GROUND2 OUTPUT3 X DYNAMIC OFFSET CANCELLATION LOW-PASS FILTER SUPPLY Vcc Vcc/2 600 400 200 20 60 100 140 AMBIENT TEMPERATURE in °°°°C ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS Dwg. GH-046-1A Suffix "–UA" R θJA = 165°C/W 40 80 120 180 700 500 300 100 160 800 Suffix "S–" Suffix "L–" Copyright © 1997, 2002 Allegro MicroSystems, Inc.

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP . OPERATION www.allegromicro.com 3 ELECTRICAL CHARACTERISTICS over operating temperature range, at VCC = 5 V (unless otherwise noted). Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Supply Voltage V CC Operating 4.5 5.0 5.5 V Supply Current I CC B = 0, VCC = 6 V, IO = 0 – 7.2 12 mA Quiescent V OQ B = 0, IO = 1 mA, TA = 25°C 2.2 2.5 2.8 V Voltage Output Output Voltage V OH B = +X*, IO = 1 mA – 4.7 – V VOL B = -X*, IO = -1 mA – 0.2 – V Output I OLM B = -X*, VO = 0 -1.0 -1.5 – mA Source Current Limit Bandwidth (-3 dB) BW – 30 – kHz Clock Frequency f C – 170 – kHz Output Resistance r O IO ≤ -2 mA – 1.0 – Ω Wide-Band e o B = 0, BW = 10 Hz to 10 kHz, – 400 – µV Output Noise (rms) I O ≤ -1 mA, CO = 100 pF NOTE 1 – Typical data is at TA = 25°C and is for design information only. NOTE 2 – Negative current is defined as coming out of (sourcing) the output. * This test requires positive and negative fields sufficient to swing the output driver between fully OFF and saturated (ON), respectively. It is NOT intended to indicate a range of linear operation.

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP . OPERATION Worcester, Massachusetts 01615-0036 (508) 853-50004 MAGNETIC CHARACTERISTICS over operating temperature range, at VCC = 5 V, IO = -1 mA (unless otherwise noted). Part Numbers A3517SUA A3517LUA A3518SUA A3518LUA Operating Temp. Range, TA -20 – +85 -40 – +150 -20 – +85 -40 – +150 °C ∆VOQ( ∆T) Ratiometry, ∆VOQ( ∆V) – 100 –– 100 –– 100 –– 100 – % Ratiometry, ∆Sens(∆V) – 100 –– 100 –– 100 –– 100 – % Positive Linearity, Lin+ – 100 –– 100 –– 100 –– 100 – % Negative Linearity, Lin–– 100 –– 100 –– 100 –– 100 – % NOTE 1 – Magnetic flux density is measured at most sensitive area of device located 0.018" (0.46 mm) below the branded face of the package. NOTE 2 – 10 G = 1 mT, exactly. NOTE 3 – Except for∆Sens(∆T), typical data is at TA = 25°C and is for design information only. * See Characteristics Definitions for test conditions. † This calculation (formula 1, next page) yields the device’s equivalent accuracy, over the operating temperature range, in gauss.

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP . OPERATION www.allegromicro.com 5 CHARACTERISTICS DEFINITIONS Ratiometry. The A3517xUA and A3518xUA feature a ratiometric output. The quiescent voltage output and sensitivity are proportional to the supply voltage (ratiometric). The per cent ratiometric change in the quiescent voltage output is defined as OQ( ∆V) = VOQ(VCC) / VOQ(5V) x 100% (4) VCC / 5 V and the per cent ratiometric change in sensitivity is defined as ∆Sens(∆V) = Sens(VCC) / Sens(5V) x 100% (5) VCC / 5 V Linearity and Symmetry. The on-chip output stage is designed to provide a linear output to within 500 mV of either rail with a supply voltage of 5 V. This is equivalent to approximately ±800 gauss of ambient field. Although application of stronger magnetic fields will not damage these devices, it will force the output into a non-linear region. Linearity in per cent is measured and defined as Lin+ = V O(500G) – VOQ x 100% (6) 2 (VO(250G) – VOQ ) Lin– = VO(-500G) – VOQ x 100% (7) 2 (VO(-250G) – VOQ ) and output symmetry as Sym = VO(500G) – VOQ x 100% (8) VOQ – VO(-500G) Quiescent Voltage Output. In the quiescent state (no magnetic field), the output is ideally equal to one-half of the supply voltage over the operating voltage and tem- perature range (V OQ ≈ VCC /2). Due to internal component tolerances and thermal considerations, there is a tolerance on the quiescent voltage output and on the quiescent voltage output as a function of supply voltage and ambient temperature. For purposes of specification, the quiescent voltage output as a function of temperature is defined as OQ( ∆T) = VOQ(TA) – VOQ(25 °C) (1) Sens(25°C) This calculation yields the device’s equivalent accuracy, over the operating temperature range, in gauss. Sensitivity. The presence of a south-pole magnetic field perpendicular to the package face (the branded surface) will increase the output voltage from its quiescent value toward the supply voltage rail by an amount proportional to the magnetic field applied. Conversely, the application of a north pole will decrease the output voltage from its quiescent value. This proportionality is specified as the sensitivity of the device and is defined as Sens = V O(500G) – VO(-500G) (2) 1000 G The stability of sensitivity as a function of tempera- ture is defined as ∆Sens(∆T) = Sens(TA) – Sens(25°C) x 100% (3) Sens(25°C)

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP . OPERATION Worcester, Massachusetts 01615-0036 (508) 853-50006 TYPICAL CHARACTERISTICS 0 25 50 75 100 AMBIENT TEMPERATURE IN °°°°C -50 Dwg. GH-039-2 125-25 SUPPLY CURRENT IN mA 9.0 8.0 7.0 6.0 150 Vcc = 5.5 V 0 25 50 75 100 1.4 0.4 AMBIENT TEMPERATURE IN °°°°C 1.2 0.8 -50 Dwg. GH-060-1 OUTPUT RESISTANCE IN ΩΩΩΩ 150-25 125 1.0 0.6 Vcc = 5 V IO = -1 mA IO = 1 mA IO = 5 mA IO = 10 mA 0 25 50 75 100 AMBIENT TEMPERATURE IN °°°°C 2.55 2.45 -50 Dwg. GH-067-1 QUIESCENT OUTPUT VOLTAGE IN VOLTS 150-25 125 2.50 Vcc = 5 V Io = -1 mA A3518– A3517– 2.46 2.47 2.48 2.49 2.51 2.52 2.53 2.54 0 25 50 75 100 6.0 1.0 AMBIENT TEMPERATURE IN °°°°C 5.0 3.0 -50 Dwg. GH-066-1 SENSITIVITY IN mV/G 150-25 125 4.0 2.0 A3518– A3517– Vcc = 5 V Io = -1 mA

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP . OPERATION www.allegromicro.com 7 Qualification Test Test Method and Test Conditions Test Length Samples Comments Temperature Humidity JESD22-A101 1000 hrs 77 Device biased for Bias Life T A = 85°C, RH = 85% minimum power Bias Life JESD22-A108 1000 hrs 77 TA = 150°C, TJ = 165°C (Surge Operating Life) JESD22-A108 168 hrs 77 TA = 175°C, TJ = 190°C Autoclave, Unbiased JESD22-A102 96 hrs 77 TA = 121°C, 15 psig High-Temperature JESD22-A103 1000 hrs 77 (Bake) Storage Life T A = 170°C Temperature Cycle JESD22-A104 1000 cycles 77 ESD, CDF-AEC-Q100-002 Pre/Post 3 per Test to failure Human Body Model Reading test All leads > 3 kV All Allegro sensors are subjected to stringent qualification requirements prior to being released to production. To become qualified, except for the destructive ESD tests, no failures are permitted. CRITERIA FOR DEVICE QUALIFICATION

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP . OPERATION Worcester, Massachusetts 01615-0036 (508) 853-50008 APPLICATIONS INFORMATION Calibrated linear Hall devices, which can be used to determine the actual flux density presented to the sensor in a particular application, are available. For safe, reliable operation, the output should not be pulled above the supply voltage or pulled below the device ground. For optimum performance, a 0.1 µF capacitor between the supply and ground, and a 100 pF capacitor between the output and ground, should be added. The ratiometric feature is especially valuable when these devices are used with an analog-to-digital converter. A/D converters typically derive their LSB step size by ratioing off a reference voltage line. If the reference voltage varies, the LSB will vary proportionally. This is a major error source in many sensing systems. The A3517xUA and A3518xUA can eliminate this source of error by their ratiometric operation. Because their gain and offsets are proportional to the supply voltage, if they are powered from the A/D reference voltage, the sensor output voltage will track changes in the LSB value. These devices can withstand infrequent temperature excursions, beyond the Absolute Maximum Ratings, to T A = 170°C provided the junction temperature, TJ, does not exceed 200°C. Extensive applications information on Hall-effect sensors and magnets is also available in the “Hall-Effect IC Applications Guide”, which can be found in the latest issue of the Allegro MicroSystems Electronic Data Book, AMS-702 or Application Note 27701, or at www.allegromicro.com TYPICAL CURRENT-SENSING APPLICATION B ≈ N x 6.9 G/A Dwg. AH-005A 1 32 Dwg. MH-011-7A 0.0195" 0.50 mm NOM BRANDED SURFACE ACTIVE AREA DEPTH 0.081" 2.06 mm 0.056" 1.42 mm A Allegro SENSOR LOCATION

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP . OPERATION www.allegromicro.com 9 RELATIVE DISTANCE RELATIVE MAGNETIC FLUX DENSITY Dwg. GH-048 RELATIVE OUTPUT VOLTAGE VCC VOQ -0.4 -0.2 0.2 0.4 GND- N S D 0.19 RELATIVE DISTANCE (TOTAL EFFECTIVE AIR GAP) RELATIVE MAGNETIC FLUX DENSITY Dwg. GH-047 RELATIVE OUTPUT VOLTAGE VCC VOQ N S D SENSOR DEPTH BELOW PACKAGE FACE RELATIVE DISTANCE RELATIVE MAGNETIC FLUX DENSITY Dwg. GH-050 RELATIVE OUTPUT VOLTAGE VCC VOQ N S D EFFECTIVE AIR GAP 0.21 EFFECTIVE AIR GAP = 0.050 EFFECTIVE AIR GAP = 0.075 EFFECTIVE AIR GAP = 0.095 RELATIVE DISTANCE RELATIVE MAGNETIC FLUX DENSITY Dwg. GH-049 RELATIVE OUTPUT VOLTAGE VCC VOQ GND- -0.08 0.10-0.10 N S S N N S S N D 0.21 D 0.19 S N N S TYPICAL POSITION-SENSING APPLICATIONS (Alnico 8, dimensions in inches)

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP . OPERATION Worcester, Massachusetts 01615-0036 (508) 853-500010 A3517xUA and A3518xUA Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) NOTES: 1. Tolerances on package height and width represent allowable mold offsets. Dimensions given are measured at the widest point (parting line). 2. Exact body and lead configuration at vendor’s option within limits shown. 3. Height does not include mold gate flash. 4. Recommended minimum PWB hole diameter to clear transition area is 0.035" (0.89 mm). 5. Where no tolerance is specified, dimension is nominal. 6. Supplied in bulk pack (500 pieces per bag). Dwg. MH-014E in 0.164 0.159 0.062 0.058 0.0173 0.0138 0.050 BSC 45° 0.640 0.600 0.0189 0.0142 0.085 MAX 45° 0.031123 0.122 0.117 SEE NOTE Dwg. MH-014E mm 4.17 4.04 1.57 1.47 0.44 0.35 1.27 BSC 45° 16.26 15.24 0.48 0.36 2.16 MAX 45° 0.79123 3.10 2.97 SEE NOTE Radial Lead Form (order A351xxUA-LC) NOTE: Lead-form dimensions are the nominals produced on the forming equipment. No dimensional tolerance is implied or guaranteed for bulk packaging (500 pieces per bag). 0.620" 0.500" (15.7 mm 12.7 mm) 0.100" (2.5 mm) Dwg. MH-026 0.108" (2.74 mm) 123

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP . OPERATION www.allegromicro.com 11 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; 5,686,894; 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 responsibil- ity for its use; nor for any infringements of patents or other rights of third parties that may result from its use. 0.095 ±0.005 0.020 MIN FLAT Dwg. MH-015 in 0.004 MAX 0.002 MAX 0°–8° 2.41 ±0.13 0.51 MIN FLAT Dwg. MH-015 mm 0.10 MAX 0.051 MAX 0°–8° Surface-Mount Lead Form (add ‘-TL’ to part number) Dimensions in Inches (controlling dimensions) Dimensions in Millimeters (for reference only) NOTE: Supplied in bulk pack (500 devices per bag).

RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP . OPERATION Worcester, Massachusetts 01615-0036 (508) 853-500012 HALL-EFFECT SENSORS LINEAR HALL-EFFECT SENSORS Partial Equivalent Part Supply Typical Accuracy Oper. NumberVoltage (V) Sensitivity (see note 3) Temp. Packages Comments UGN3503 4.5 to 6 1.3 mV/G — S LT, UA A3515x 4.5 to 5.5 5 mV/G < ±10 G E, L UA chopper stabilized A3516x 4.5 to 5.5 2.5 mV/G < ±10 G E, L UA chopper stabilized A3517x 4.5 to 5.5 5 mV/G < ±20 G S, L UA chopper stabilized A3518x 4.5 to 5.5 2.5 mV/G < ±20 G S, L UA chopper stabilized Notes: 1) Typical data is at TA = +25°C and nominal operating voltage. 2) “x” = Operating Temperature Range [suffix letter or (prefix)]: S (UGN) = -20°C to +85°C, E = -40°C to +85°C, J = -40°C to +115°C, K (UGS) = -40°C to +125°C, L (UGL) = -40°C to +150°C. 3) Linear Hall-effect equivalent accuracy is defined as ∆VOQ over the operating temperature range, divided by sensitivity.