A3515 and A3516 Ratiometric, Linear Hall-Effect Sensors for High-Temperature Operation Not for New Design These parts are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Date of status change: May 2, 2005 Recommended Substitutions: For new customers or new applications: • for the A3515, please refer to the Allegro A1321, and • for the A3516, please refer to the Allegro A1323. 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. AND Data Sheet 27501.10C 3515 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FOR HIGH-TEMPERATURE OPERATION X The A3515– and A3516– are sensitive, temperature-stable linear Halleffect 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 A3515– features an output sensitivity of 5 mV/G, while the A3516– has an output sensitivity of 2.5 mV/G. See the Magnetic Characteristics table for complete, individual device parametrics. CC 2 3 OUTPUT SUPPLY 1 GROUND 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 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 devices are supplied in a 3-pin ultra-mini-SIP ‘UA’ package. 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 ‘E–’ ..................... -40°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., A3515LUA . 3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS FUNCTIONAL BLOCK DIAGRAM SUPPLY 1 LOW-PASS FILTER + – X DYNAMIC OFFSET CANCELLATION Vcc ALLOWABLE PACKAGE POWER DISSIPATION in MILLIWATTS 800 700 Suffix "–UA" RθJA = 165°C/W 600 Suffix "–U" RθJA = 184°C/W 500 400 300 200 Suffix "E–" 100 Suffix "L–" 0 60 100 80 120 AMBIENT TEMPERATURE in °C 140 160 180 Dwg. GH-046A 2 2 GROUND Dwg. FH-016A θ° 40 OUTPUT + Vcc/2 20 3 – 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Copyright © 1996, 2003 Allegro MicroSystems, Inc. 3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS 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 10 mA Quiescent Voltage Output VOQ B = 0, IO = 1 mA, TA = 25°C 2.425 2.500 2.575 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 3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS MAGNETIC CHARACTERISTICS over operating temperature range, at VCC = 5 V, IO = -1 mA (unless otherwise noted). Part Numbers A3515EUA A3515LUA A3516EUA A3516LUA Characteristic* Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. Operating Temp. Range, TA -40 -40 -40 -40 Sensitivity at TA = 25°C 4.50 5.00 5.50 4.50 5.00 5.50 2.25 2.50 2.75 2.25 2.50 2.75 ∆Sens(∆T) at TA = Max. -2.5 2.5 7.5 -2.5 2.5 7.5 -2.5 2.5 7.5 -2.5 2.5 7.5 % ∆Sens(∆T) at TA = Min. -9.0 -1.3 1.0 -9.0 -1.3 1.0 -9.0 -1.3 1.0 -9.0 -1.3 1.0 % ∆VOQ(∆T) – +85 – +150 – +85 – +150 Units °C mV/G – – ±10 – – ±10 – – ±10 – – ±10 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 0.0195" (0.50 mm) below the branded face of the “UA” 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 3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS 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 ∆VOQ(∆T) = VOQ(TA) – VOQ(25°C) Sens(25°C) (1) 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 = VO(500G) – VO(-500G) 1000 G Sens(TA) – Sens(25°C) Sens(25°C) The per cent ratiometric change in the quiescent voltage output is defined as ∆VOQ(∆V) = VCC / 5 V Sens(VCC) / Sens(5V) ∆Sens(∆V) = x 100% (4) VCC / 5 V x 100% (5) 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) Lin– = VO(500G) – VOQ 2 (VO(250G) – VOQ) VO(-500G) – VOQ 2 (VO(-250G) – VOQ) x 100% (6) x 100% (7) and output symmetry as x 100% (3) Sym = www.allegromicro.com VOQ(VCC) / VOQ(5V) and the per cent ratiometric change in sensitivity is defined as Lin+ = The stability of sensitivity as a function of temperature is defined as ∆Sens(∆T) = Ratiometry. The A3515xUA and A3516xUA feature a ratiometric output. The quiescent voltage output and sensitivity are proportional to the supply voltage (ratiometric). VO(500G) – VOQ VOQ – VO(-500G) x 100% (8) 5 3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS 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 IO = 1 0 mA 0.6 6.0 -50 -25 0 25 50 75 100 125 0.4 -50 150 -25 0 25 50 100 75 Dwg. GH-039-2 Dwg. GH-060-1 2.55 6.0 2.54 A3515– 5.0 2.53 2.52 2.51 SENSITIVITY IN mV/G QUIESCENT OUTPUT VOLTAGE IN VOLTS 150 AMBIENT TEMPERATURE IN ° C AMBIENT TEMPERATURE IN °C A3515– 2.50 A3516– 2.49 2.48 Vcc = 5 V Io = -1 mA 2.47 4.0 3.0 A3516– 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 6 125 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 Dwg. GH-066 3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS APPLICATIONS INFORMATION SENSOR LOCATION 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 A3515xUA and A3516xUA 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. SUFFIX “UA” ACTIVE AREA DEPTH 0.0195" 0.50 mm NOM 0.081" 2.06 mm 0.056" 1.42 mm A BRANDED SURFACE 1 2 3 Dwg. MH-011-7A 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 Allegro www.allegromicro.com TYPICAL CURRENT-SENSING APPLICATION B ≈ N x 6.9 G/A Dwg. AH-005A www.allegromicro.com 7 3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS 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 GND 0 RELATIVE DISTANCE 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 EFFECTIVE AIR GAP = 0.050 S - 8 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 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 0.20 VOQ 0.25 Dwg. GH-050 3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS A3515xUA and A3516xUA 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° 0.122 0.117 3.10 2.97 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). www.allegromicro.com 9 3515 AND 3516 RATIOMETRIC, LINEAR HALL-EFFECT SENSORS Surface-Mount Lead Form (order A351xxUA-TL) Dimensions in Inches Dimensions in Millimeters (controlling dimensions) (for reference only) 0.095 2.41 ±0.005 0.004 MAX ±0.13 0.002 0.051 MAX MAX 0°–8° 0.10 0.020 MAX MIN FLAT Dwg. MH-015 in 0°–8° 0.51 MIN FLAT Dwg. MH-015 mm 1.27 0.050 BSC BSC 1.57 0.062 0.97 0.038 Dwg. MA-013-3 mm Dwg. MA-013-3 in NOTE: 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. 10 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000