A3517 and A3518 Ratiometric, Linear Hall-Effect Sensors for High-Temperature Operation Last Time Buy 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 This classification indicates that the product is obsolete and notice has been given.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. Date of status change: May 2, 2005 Deadline for receipt of LAST TIME BUY orders: December 31, 2005 Recommended Substitutions: 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 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. Data Sheet 27501.11A* 3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION X 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 approximately 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. 1 2 3 GROUND OUTPUT CC SUPPLY V Dwg. PH-006 Pinning is shown viewed from branded side. 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 lowimpedance output stage. A proprietary dynamic offset cancelation technique, with an internal highfrequency 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. ABSOLUTE MAXIMUM RATINGS Supply Voltage, VCC ......................... 8.0 V Output Voltage, VO ........................... 8.0 V Output Sink Current, IO .................. 10 mA Magnetic Flux Density, B ......... Unlimited Package Power Dissipation, PD .................................... See Graph Operating Temperature Range*, TA Suffix S– .................... -20°C to +85°C Suffix L– .................... -40°C to +150°C Storage Temperature Range, TS ............................. -65°C to +170°C * Infrequent excursions permitted; see Applications Information. FEATURES ■ Temperature-Stable Quiescent Output Voltage ■ Precise Recoverability After Temperature Cycling ■ Output Voltage Proportional to Applied Magnetic Field ■ Ratiometric Rail-to-Rail Output ■ Improved Sensitivity ■ 4.5 V to 5.5 V Operation ■ Immune to Mechanical Stress ■ Small Package Size ■ Solid-State Reliability Always order by complete part number, e.g., A3517SUA . 3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION FUNCTIONAL BLOCK DIAGRAM SUPPLY 1 LOW-PASS FILTER + – X DYNAMIC OFFSET CANCELLATION Vcc ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS 700 Suffix "–UA" RθJA = 165°C/W 600 500 400 300 200 Suffix "S–" 100 Suffix "L–" 0 60 100 80 120 AMBIENT TEMPERATURE in °C 140 160 180 Dwg. GH-046-1A 2 2 GROUND Dwg. FH-016A 800 40 OUTPUT + Vcc/2 20 3 – 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1997, 2002 Allegro MicroSystems, Inc. 3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION ELECTRICAL CHARACTERISTICS over operating temperature range, at VCC = 5 V (unless otherwise noted). Limits Characteristic Symbol Test Conditions Min. Typ. Max. Units Supply Voltage VCC Operating 4.5 5.0 5.5 V Supply Current ICC B = 0, VCC = 6 V, IO = 0 – 7.2 12 mA Quiescent Voltage Output VOQ B = 0, IO = 1 mA, TA = 25°C 2.2 2.5 2.8 V Output Voltage VOH B = +X*, IO = 1 mA – 4.7 – V VOL B = -X*, IO = -1 mA – 0.2 – V Output Source Current Limit IOLM B = -X*, VO = 0 -1.0 -1.5 – mA Bandwidth (-3 dB) BW – 30 – kHz Clock Frequency fC – 170 – kHz Output Resistance rO IO ≤ -2 mA – 1.0 – Ω Wide-Band Output Noise (rms) eo B = 0, BW = 10 Hz to 10 kHz, IO ≤ -1 mA, CO = 100 pF – 400 – µV 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. www.allegromicro.com 3 3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION MAGNETIC CHARACTERISTICS over operating temperature range, at VCC = 5 V, IO = -1 mA (unless otherwise noted). Part Numbers A3517SUA A3517LUA A3518SUA A3518LUA Characteristic* Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Operating Temp. Range, T A -20 – +85 -40 – +150 -20 – +85 -40 – +150 °C Sensitivity at TA = 25°C 4.0 5.0 6.0 4.0 5.0 6.0 2.0 2.5 3.0 2.0 2.5 3.0 mV/G ∆Sens(∆T) at TA = Max. -5.0 2.5 10 -5.0 2.5 10 -5.0 2.5 10 -5.0 2.5 10 % ∆Sens(∆T) at TA = Min. -9.0 -1.3 6.0 -9.0 -1.3 6.0 -9.0 -1.3 6.0 -9.0 -1.3 6.0 % Units ∆VOQ(∆T)† – – ±20 – – ±20 – – ±20 – – ±20 G 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 – % Symmetry – 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. 4 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION CHARACTERISTICS DEFINITIONS 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 temperature range (VOQ ≈ 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 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 ∆VOQ(∆V) = ∆VOQ(∆T) = VOQ(TA) – VOQ(25°C) VO(500G) – VO(-500G) ∆Sens(∆V) = Lin+ = The stability of sensitivity as a function of temperature is defined as Lin– = Sens(25°C) x 100% Sens(VCC) / Sens(5V) VCC / 5 V x 100% (5) VO(500G) – VOQ 2 (VO(250G) – VOQ) x 100% (6) x 100% (7) VO(-500G) – VOQ 2 (VO(-250G) – VOQ) (3) and output symmetry as Sym = www.allegromicro.com (4) 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 (2) 1000 G Sens(TA) – Sens(25°C) x 100% and the per cent ratiometric change in sensitivity is defined as 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(∆T) = VCC / 5 V (1) Sens(25°C) This calculation yields the device’s equivalent accuracy, over the operating temperature range, in gauss. Sens = VOQ(VCC) / VOQ(5V) VO(500G) – VOQ VOQ – VO(-500G) x 100% (8) 5 3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION TYPICAL CHARACTERISTICS 1.4 9.0 Vcc = 5.5 V OUTPUT RESISTANCE IN Ω SUPPLY CURRENT IN mA 1.2 8.0 7.0 Vcc = 5 V IO = 1.0 A -1 m IO = IO = A 1m 5 mA 0.8 0 mA IO = 1 0.6 6.0 -50 -25 0 25 50 100 75 125 0.4 -50 150 -25 0 25 50 100 75 AMBIENT TEMPERATURE IN °C Dwg. GH-039-2 6.0 2.54 A3517– 5.0 2.53 2.52 2.51 SENSITIVITY IN mV/G QUIESCENT OUTPUT VOLTAGE IN VOLTS 150 Dwg. GH-060-1 2.55 A3517– 2.50 A3518– 2.49 2.48 Vcc = 5 V Io = -1 mA 2.47 4.0 3.0 A3518– 2.0 Vcc = 5 V Io = -1 mA 1.0 2.46 2.45 -50 -25 0 25 50 75 100 125 150 0 -50 -25 0 25 50 75 100 125 150 AMBIENT TEMPERATURE IN ° C AMBIENT TEMPERATURE IN ° C Dwg. GH-067-1 6 125 AMBIENT TEMPERATURE IN ° C 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Dwg. GH-066-1 3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION CRITERIA FOR DEVICE QUALIFICATION 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. Qualification Test Test Method and Test Conditions Test Length Samples Temperature Humidity Bias Life JESD22-A101 TA = 85°C, RH = 85% 1000 hrs 77 Bias Life JESD22-A108 TA = 150°C, TJ = 165°C 1000 hrs 77 (Surge Operating Life) JESD22-A108 TA = 175°C, TJ = 190°C 168 hrs 77 Autoclave, Unbiased JESD22-A102 TA = 121°C, 15 psig 96 hrs 77 High-Temperature (Bake) Storage Life JESD22-A103 TA = 170°C 1000 hrs 77 Temperature Cycle JESD22-A104 1000 cycles 77 ESD, Human Body Model CDF-AEC-Q100-002 Pre/Post Reading 3 per test www.allegromicro.com Comments Device biased for minimum power Test to failure All leads > 3 kV 7 3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION APPLICATIONS INFORMATION TYPICAL CURRENT-SENSING APPLICATION Calibrated linear Hall devices, which can be used to determine the actual flux density presented to the sensor in a particular application, are available. B ≈ N x 6.9 G/A 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. Dwg. AH-005A SENSOR LOCATION ACTIVE AREA DEPTH 0.0195" 0.50 mm NOM 0.056" 1.42 mm These devices can withstand infrequent temperature excursions, beyond the Absolute Maximum Ratings, to TA = 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 0.081" 2.06 mm A BRANDED SURFACE 1 2 Dwg. MH-011-7A www.allegromicro.com Allegro 8 3 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION TYPICAL POSITION-SENSING APPLICATIONS (Alnico 8, dimensions in inches) + + VCC VCC 0.21 D N S S N N S S N RELATIVE OUTPUT VOLTAGE D 0 VOQ 0.19 S N RELATIVE OUTPUT VOLTAGE S RELATIVE MAGNETIC FLUX DENSITY N RELATIVE MAGNETIC FLUX DENSITY SENSOR DEPTH BELOW PACKAGE FACE N S D 0 0 0.1 0.2 0.3 0.4 RELATIVE DISTANCE (TOTAL EFFECTIVE AIR GAP) + VOQ 0.5 -0.10 -0.08 -0.06 Dwg. GH-047 -0.04 0 0.04 RELATIVE DISTANCE EFFECTIVE AIR GAP = 0.050 S - GND 0 RELATIVE DISTANCE www.allegromicro.com 0.2 0.4 Dwg. GH-048 S 0.21 RELATIVE OUTPUT VOLTAGE VOQ N D RELATIVE MAGNETIC FLUX DENSITY 0 RELATIVE OUTPUT VOLTAGE RELATIVE MAGNETIC FLUX DENSITY Dwg. GH-049 EFFECTIVE AIR GAP D -0.2 GND 0.10 VCC 0.19 -0.4 0.08 + VCC N 0.06 EFFECTIVE AIR GAP = 0.075 EFFECTIVE AIR GAP = 0.095 0 0 0.05 0.10 0.15 RELATIVE DISTANCE 0.20 VOQ 0.25 Dwg. GH-050 9 3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION A3517xUA and A3518xUA Dimensions in Millimeters (for reference only) Dimensions in Inches (controlling dimensions) 0.164 0.159 4.17 4.04 0.062 0.058 45° 1.57 1.47 45° 3.10 2.97 0.122 0.117 45° 45° 0.085 1 2 3 0.031 2.16 1 2 0.79 3 MAX MAX 0.640 0.600 16.26 15.24 0.0173 0.0138 0.0189 0.0142 SEE NOTE 0.44 0.35 0.48 0.36 SEE NOTE 1.27 0.050 BSC BSC Dwg. MH-014E in Dwg. MH-014E mm Radial Lead Form (order A351xxUA-LC) 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). 1 2 3 0.108" (2.74 mm) 0.620" 0.500" (15.7 mm 12.7 mm) 0.100" (2.5 mm) Dwg. MH-026 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). 10 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION Surface-Mount Lead Form (add ‘-TL’ to part number) Dimensions in Inches Dimensions in Millimeters (controlling dimensions) (for reference only) 0.095 2.41 ±0.005 0.004 MAX NOTE: ±0.13 0.002 0.051 MAX MAX 0°–8° 0.10 0.020 MIN FLAT MAX Dwg. MH-015 in 0°–8° 0.51 MIN FLAT Dwg. MH-015 mm Supplied in bulk pack (500 devices per bag). 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. www.allegromicro.com 11 3517 AND 3518 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMP. OPERATION HALL-EFFECT SENSORS LINEAR HALL-EFFECT SENSORS Partial Part Number Supply Voltage (V) Typical Sensitivity Equivalent Accuracy (see note 3) Oper. Temp. Packages Comments UGN3503 A3515x A3516x A3517x A3518x 4.5 to 6 4.5 to 5.5 4.5 to 5.5 4.5 to 5.5 4.5 to 5.5 1.3 mV/G 5 mV/G 2.5 mV/G 5 mV/G 2.5 mV/G — <±10 G <±10 G <±20 G <±20 G S E, L E, L S, L S, L LT, UA UA UA UA UA chopper stabilized chopper stabilized chopper stabilized 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. 12 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000