A1301 and A1302
Continuous-Time Ratiometric Linear Hall Effect Sensors Features and Benefits▪ Low-noise output▪ Fast power-on time▪ Ratiometric rail-to-rail output▪ 4.5 to 6.0 V operation▪ Solid-state reliability▪ Factory-programmed at end-of-line for optimum performance▪ Robust ESD performance DescriptionThe A1301 and A1302 are continuous-time, ratiometric, linear Hall-effect sensors. They are optimized to accurately provide a voltage output that is proportional to an applied magnetic field. These devices have a quiescent output voltage that is 50% of the supply voltage. Two output sensitivity options are provided: 2.5 mV/G typical for the A1301, and 1.3 mV/G typical for the A1302. The Hall-effect integrated circuit included in each device includes a Hall sensing element, a linear amplifier, and a CMOS Class A output structure. Integrating the Hall sensing element and the amplifier on a single chip minimizes many of the problems normally associated with low voltage level analog signals.High precision in output levels is obtained by internal gain and offset trim adjustments made at end-of-line during the manufacturing process.These features make the A1301 and A1302 ideal for use in position sensing systems, for both linear target motion and rotational target motion. They are well-suited for industrial applications over extended temperature ranges, from –40°C to 125°C.Two device package types are available: LH, a 3-pin SOT23W type for surface mount, and UA, a 3-pin ultramini SIP for through-hole mount. They are lead (Pb) free (suffix, –T) with 100% matte tin plated leadframes.Packages: 3 pin SOT23W (suffix LH), and 3 pin SIP (suffix UA)Not to scaleFunctional Block DiagramV+VCCVoltageRegulatorFilterAmpOutVOUTGainCBYPASSOffsetTrimControlGNDA1301-DS, Rev. 5
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A1301 and A1302
Continuous-Time Ratiometric Linear Hall Effect Sensors
Selection Guide
Part NumberA1301ELHLT-TA1301EUA-TA1301KLHLT-TA1301KUA-TA1302ELHLT-TA1302EUA-TA1302KLHLT-T
Pb-free1YesYesYesYesYesYesYes
Packing2
7-in. tape and reel, 3000 pieces/reel
Bulk, 500 pieces/bag
7-in. tape and reel, 3000 pieces/reel
Bulk, 500 pieces/bag
7-in. tape and reel, 3000 pieces/reel
Bulk, 500 pieces/bag
7-in. tape and reel, 3000 pieces/reel
PackageSurface Mount
SIPSurface Mount
SIPSurface Mount
SIPSurface Mount
Ambient, TA–40ºC to 85ºC
2.5 mV/G
–40ºC to 125ºC–40ºC to 85ºC
1.3 mV/GSensitivity (Typical)
–40ºC to 125ºC
A1302KUA-TYesBulk, 500 pieces/bagSIP
1Pb-based variants are being phased out of the product line. Certain variants cited in this footnote are no longer in production The variants should not be purchased for new design applications. Samples are no longer available. Status change: May 1, 2006. These variants include: A1301ELHLT, A1301EUA, A1301KLHLT, A1301KUA, A1302ELHLT, A1302EUA, A1302KLHLT, and A1302KUA.2Contact Allegro for additional packing options.
Absolute Maximum Ratings
Characteristic
Supply Voltage Output Voltage
Reverse Supply VoltageReverse Supply VoltageOutput Sink Current
Operating Ambient TemperatureMaximum Junction TemperatureStorage Temperature
SymbolVCCVOUTVRCCVRCCIOUTTATJ(max)Tstg
Range ERange K
Notes
Rating88–0.1–0.110–40 to 85–40 to 125
165–65 to 170
UnitsVVVVmAºCºCºCºC
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115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000www.allegromicro.com
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A1301 and A1302
Continuous-Time Ratiometric Linear Hall Effect Sensors
DEVICE CHARACTERISTICS over operating temperature range, TA, and VCC = 5 V, unless otherwise noted
CharacteristicSymbolTest ConditionsMin.
Electrical CharacteristicsSupply VoltageVCCRunning, TJ < 165°C4.5
Output open–Supply CurrentICC
VOUT(High)ISOURCE = –1 mA, Sens = nominal4.65
Output Voltage
–VOUT(Low)ISINK = 1 mA, Sens = nominal
Output BandwidthBW–
VCC(min) to 0.95 VOUT; B = ±1400 G;
Power-On TimetPO–
Slew rate = 4.5 V/μs to 4.5 V/100 ns
Output ResistanceROUTISINK ≤ 1 mA, ISOURCE ≥ –1 mA–
External output low pass filter ≤ 10 kHz;
Wide Band Output Noise, rmsVOUTN–
Sens = nominal
Ratiometry
Quiescent Output Voltage Error
ΔVOUTQ(V)TA = 25°C–
with respect to ΔVCC1
Magnetic Sensitivity Error with
ΔSens(V)TA = 25°C–
respect to ΔVCC2OutputLinearityLinTA = 25°C–SymmetrySymTA = 25°C–Magnetic CharacteristicsQuiescent Output VoltageVOUTQB = 0 G; TA = 25°C2.4Quiescent Output Voltage over
VOUTQ(ΔTA)B = 0 G2.2
Operating Temperature Range
2.0A1301; TA = 25°C
Magnetic SensitivitySens
A1302; TA = 25°C1.0A13011.8Magnetic Sensitivity over
Sens(ΔTA)
Operating Temperature RangeA13020.851Refer to equation (4) in Ratiometric section on page 4.2Refer to equation (5) in Ratiometric section on page 4.
Typ.––4.70.22032150
Max.611–0.25–55–
UnitsVmAVVkHzμsΩμV
––––2.5–2.51.3––
±3.0±3.0±2.5±3.02.62.83.01.63.21.75
%%%%VVmV/GmV/GmV/GmV/G
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000www.allegromicro.com
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A1301 and A1302
Continuous-Time Ratiometric Linear Hall Effect Sensors
Characteristic Definitions
Ratiometric. The A1301 and A1302 feature a ratiometric output. This means that the quiescent voltage output, VOUTQ, and the magnetic sensitivity, Sens, are proportional to the supply voltage, VCC.
The ratiometric change (%) in the quiescent voltage output is defined as:
ΔVOUTQ(ΔV)=VOUTQ(VCC)VCCVOUTQ(5V)5V× 100%Quiescent Output Voltage. In the quiescent state (no sig-nificant magnetic field: B = 0), the output, VOUTQ, equals one half of the supply voltage, VCC, throughout the entire operating ranges of VCC and ambient temperature, TA. Due to internal component tolerances and thermal considerations, there is a tolerance on the quiescent output voltage, ΔVOUTQ, which is a function of both ΔVCC and ΔTA. For purposes of specifica-tion, the quiescent output voltage as a function of temperature, ΔVOUTQ(ΔTA), is defined as:
ΔVOUTQ(ΔΤΑ)=
VOUTQ(ΤΑ)–VOUTQ(25ºC)
Sens(25ºC)
(4)
(1)
and the ratiometric change (%) in sensitivity is defined as:
ΔSens(ΔV)=
Sens(VCC)
VCC
Sens(5V)5V
× 100%
(5)
where Sens is in mV/G, and the result is the device equivalent accuracy, in gauss (G), applicable over the entire operating tem-perature range.
Sensitivity. The presence of a south-polarity (+B) magnetic field, perpendicular to the branded face of the device package, increases the output voltage, VOUT, in proportion to the magnetic field applied, from VOUTQ toward the VCC rail. Conversely, the application of a north polarity (–B) magnetic field, in the same orientation, proportionally decreases the output voltage from its quiescent value. This proportionality is specified as the magnetic sensitivity of the device and is defined as:
Sens=
VOUT(–B)–VOUT(+B)
2B
Linearity and Symmetry. The on-chip output stage is designed to provide linear output at a supply voltage of 5 V. Although the application of very high magnetic fields does not damage these devices, it does force their output into a nonlinear region. Linearity in percent is measured and defined as:
Lin+=
VOUT(+B)–VOUTQ2 (VOUT(+B½) –VVOUTQ)VOUT(–B)–VOUTQ2(VOUT(–B½)–VOUTQ)
× 100%
(6)
(2)
Lin–=
× 100%(7)
The stability of the device magnetic sensitivity as a function of ambient temperature, Δ Sens (ΔTA) (%) is defined as:
ΔSens(ΔΤΑ)=
Sens(ΤΑ)–Sens(25ºC)
Sens(25ºC)
× 100%
and output symmetry as:
Sym=
VOUT(+B)–VOUTQVOUTQ–VOUT(–B)
× 100%
(3)(8)
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000www.allegromicro.com
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A1301 and A1302
Continuous-Time Ratiometric Linear Hall Effect Sensors
Typical Characteristics
(30 pieces, 3 fabrication lots)
1301DeviceSensitivityvs.AmbientTemperature2.652.60Sensitivity(mV/G)2.552.502.452.402.35–50–250255075Temperature(°C)100125150LHPackageSensitivity(mV/G)UAPackage1.401.381.361.341.321.301.281.261.24-501302DeviceSensitivityvs.TemperatureUAPackageLHPackage-250255075100125150Temperature(°C)1301DeviceVOUTQvs.AmbientTemperature1302DeviceVOUTQvs.AmbientTemperature2.602.60OutputVoltage(V)OutputVoltage(V)2.552.552.502.502.452.452.40–50–250255075100Temperature(°C)1251502.40–50–250255075100Temperature(°C)1251501301DeviceSensitivityvs.SupplyVoltage3.51.71.61302DeviceSensitivityvs.SupplyVoltageSensitivity(mV/G)Sensitivity(mV/G)3.01.51.41.31.21.12.52.01.54.55.05.5SupplyVoltage(V)6.01.04.55.05.5SupplyVoltage(V)6.0Continued on the next page...
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000www.allegromicro.com
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A1301 and A1302
Continuous-Time Ratiometric Linear Hall Effect Sensors
Typical Characteristics, continued
(30 pieces, 3 fabrication lots)
1301DeviceVOUTQvs.SupplyVoltage3.5OutputVoltage(V)OutputVoltage(V)3.51302DeviceVOUTQvs.SupplyVoltage3.03.02.52.52.02.01.54.55.05.5SupplyVoltage(V)6.01.54.55.05.5SupplyVoltage(V)6.01301DeviceLIN+andLIN–vs.SupplyVoltage100.4100.3LIN–Linearity(%)Linearity(%)100.2100.1100.0LIN+99.999.84.55.05.5SupplyVoltage(V)6.099.9100.01302DeviceLIN+andLIN–vs.SupplyVoltageLIN+99.8LIN–99.799.64.55.05.5SupplyVoltage(V)6.01301DeviceSymmetryvs.SupplyVoltage100.099.999.8Symmetry(%)Symmetry(%)99.799.699.599.499.399.299.199.04.5100.5100.4100.3100.2100.1100.099.999.899.799.65.05.5SupplyVoltage(V)6.099.54.51302DeviceSymmetryvs.SupplyVoltage5.05.5SupplyVoltage(V)6.0Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000www.allegromicro.com
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A1301 and A1302
Continuous-Time Ratiometric Linear Hall Effect Sensors
Package LH, 3-Pin; (SOT-23W)
3.00 .118 2.70 .1060.15 [.006]MCAB 3.04.120 2.80.1101.49 .059NOMA8º0º0.20.0080.08.0033ABB 2.10 .083 1.85 .073Preliminary dimensions, for reference onlyDimensions in millimetersU.S. Customary dimensions (in.) in brackets, for reference only(reference JEDEC TO-236 AB, except case width and terminal tip-to-tip)Dimensions exclusive of mold flash, gate burrs, and dambar protrusionsExact case and lead configuration at supplier discretion within limits shown AHall element (not to scale)BActive Area Depth 0.28 [.011] 3X0.10 [.004]C3X0.50.0200.30.0120.20 [.008]MCAB0.95.0371.90.075A0.96.038ANOM0.60.0240.25.010120.25.010SEATINGPLANE1.17.0460.75.0300.15.0060.00.000CSEATING PLANEGAUGE PLANEPin-out Drawings
Package LH
3
Package UA
12
123Terminal List
SymbolVCCVOUTGND
Number
Package LHPackage UA
112332
Description
Connects power supply to chip
Output from circuitGround
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000www.allegromicro.com
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A1301 and A1302
Continuous-Time Ratiometric Linear Hall Effect Sensors
Package UA, 3-Pin SIP
.1644.17.1594.04CD.08052.04NOM.0621.57.0581.47D.1223.10.1172.97.05651.44NOMDB.0852.16MAX.0310.79REFA .64016.26 .60015.24.0170.44.0140.351.0190.48.0140.3623.0501.27NOMDimensions in inchesMetric dimensions (mm) in brackets, for reference onlyADambar removal protrusion (6X)BEjector mark on opposite side CActive Area Depth .0195 [0.50] NOM DHall element (not to scale) 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 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 components 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 ity for its use; nor for any in fringe ment of patents or other rights of third parties which may result from its use. Copyright © 2005, 2006 Allegro MicroSystems, Inc.
Allegro MicroSystems, Inc.
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000www.allegromicro.com
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