A1301_06

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 Description The 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 scale Functional Block Diagram V+ VCC Voltage Regulator Filter Amp Out VOUT Gain CBYPASS Offset Trim Control GND A1301-DS, Rev. 5 A1301 and A1302 Continuous-Time Ratiometric Linear Hall Effect Sensors Selection Guide Part Number A1301ELHLT-T A1301EUA-T A1301KLHLT-T A1301KUA-T A1302ELHLT-T A1302EUA-T A1302KLHLT-T 1Pb-based Pb-free1 Yes Yes Yes Yes Yes Yes Yes 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 Package Surface Mount SIP Surface Mount SIP Surface Mount SIP Surface Mount Ambient, TA –40ºC to 85ºC Sensitivity (Typical) 2.5 mV/G –40ºC to 125ºC –40ºC to 85ºC 1.3 mV/G –40ºC to 125ºC A1302KUA-T Yes Bulk, 500 pieces/bag SIP 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 Voltage Reverse Supply Voltage Output Sink Current Operating Ambient Temperature Maximum Junction Temperature Storage Temperature Symbol VCC VOUT VRCC VRCC IOUT TA TJ(max) Tstg Range E Range K Notes Rating 8 8 –0.1 –0.1 10 –40 to 85 –40 to 125 165 –65 to 170 Units V V V V mA ºC ºC ºC ºC Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 2 A1301 and A1302 Continuous-Time Ratiometric Linear Hall Effect Sensors DEVICE CHARACTERISTICS over operating temperature range, TA, and VCC = 5 V, unless otherwise noted Characteristic Symbol Test Conditions Min. Electrical Characteristics Supply Voltage VCC Running, TJ < 165°C 4.5 Output open – Supply Current ICC VOUT(High) ISOURCE = –1 mA, Sens = nominal 4.65 Output Voltage – VOUT(Low) ISINK = 1 mA, Sens = nominal Output Bandwidth BW – VCC(min) to 0.95 VOUT; B = ±1400 G; Power-On Time tPO – Slew rate = 4.5 V/μs to 4.5 V/100 ns Output Resistance ROUT ISINK ≤ 1 mA, ISOURCE ≥ –1 mA – External output low pass filter ≤ 10 kHz; Wide Band Output Noise, rms VOUTN – 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 ΔVCC2 Output Linearity Lin TA = 25°C – – Symmetry Sym TA = 25°C Magnetic Characteristics Quiescent Output Voltage VOUTQ B = 0 G; TA = 25°C 2.4 Quiescent Output Voltage over VOUTQ(ΔTA) B = 0 G 2.2 Operating Temperature Range 2.0 A1301; TA = 25°C Magnetic Sensitivity Sens A1302; TA = 25°C 1.0 A1301 1.8 Magnetic Sensitivity over Sens(ΔTA) Operating Temperature Range A1302 0.85 1Refer to equation (4) in Ratiometric section on page 4. 2Refer to equation (5) in Ratiometric section on page 4. Typ. – – 4.7 0.2 20 3 2 150 Max. 6 11 – 0.25 – 5 5 – Units V mA V V kHz μs Ω μV – – – – 2.5 – 2.5 1.3 – – ±3.0 ±3.0 ±2.5 ±3.0 2.6 2.8 3.0 1.6 3.2 1.75 % % % % V V mV/G mV/G mV/G mV/G Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 3 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) VCC VOUTQ(5V) 5V × 100% Quiescent Output Voltage. In the quiescent state (no significant 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 specification, the quiescent output voltage as a function of temperature, ΔVOUTQ(ΔTA), is defined as: ΔVOUTQ(ΔΤΑ) = VOUTQ(ΤΑ) – VOUTQ(25ºC) Sens(25ºC) (4) and the ratiometric change (%) in sensitivity is defined as: (1) 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 temperature 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) – VOUTQ 2 (VOUT(+B½) – VVOUTQ ) VOUT(–B) – VOUTQ 2(VOUT(–B½) – VOUTQ) × 100% (6) (2) Lin– = × 100% (7) The stability of the device magnetic sensitivity as a function of ambient temperature, ΔSens (ΔTA) (%) is defined as: ΔSens(ΔΤΑ) = Sens(ΤΑ) – Sens(25ºC) Sens(25ºC) × 100% and output symmetry as: Sym = VOUT(+B) – VOUTQ VOUTQ – VOUT(–B) × 100% (3) (8) Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 4 A1301 and A1302 Continuous-Time Ratiometric Linear Hall Effect Sensors Typical Characteristics (30 pieces, 3 fabrication lots) 1301 Device Sensitivity vs. Ambient Temperature 2.65 2.60 Sensitivity (mV/G) 2.55 2.50 2.45 2.40 2.35 –50 –25 0 25 50 75 Temperature (°C) 100 125 150 LH Package Sensitivity (mV/G) UA Package 1.40 1.38 1.36 1.34 1.32 1.30 1.28 1.26 1.24 -50 1302 Device Sensitivity vs. Temperature UA Package LH Package -25 0 25 50 75 100 125 150 Temperature (°C) 1301 Device VOUTQ vs. Ambient Temperature 1302 Device VOUTQ vs. Ambient Temperature 2.60 2.60 Output Voltage (V) Output Voltage (V) 2.55 2.55 2.50 2.50 2.45 2.45 2.40 –50 –25 0 25 50 75 100 Temperature (°C) 125 150 2.40 –50 –25 0 25 50 75 100 Temperature (°C) 125 150 1301 Device Sensitivity vs. Supply Voltage 3.5 1.7 1.6 1302 Device Sensitivity vs. Supply Voltage Sensitivity (mV/G) Sensitivity (mV/G) 3.0 2.5 1.5 1.4 1.3 1.2 1.1 2.0 1.5 4.5 5.0 5.5 Supply Voltage (V) 6.0 1.0 4.5 5.0 5.5 Supply Voltage (V) 6.0 Continued on the next page... Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 5 A1301 and A1302 Continuous-Time Ratiometric Linear Hall Effect Sensors Typical Characteristics, continued (30 pieces, 3 fabrication lots) 1301 Device VOUTQ vs. Supply Voltage 3.5 Output Voltage (V) Output Voltage (V) 3.5 1302 Device VOUTQ vs. Supply Voltage 3.0 3.0 2.5 2.5 2.0 2.0 1.5 4.5 5.0 5.5 Supply Voltage (V) 6.0 1.5 4.5 5.0 5.5 Supply Voltage (V) 6.0 1301 Device LIN+ and LIN– vs. Supply Voltage 100.4 100.3 100.2 Linearity (%) 100.1 100.0 LIN+ 99.9 99.8 4.5 5.0 5.5 Supply Voltage (V) 6.0 LIN– Linearity (%) 99.9 100.0 1302 Device LIN+ and LIN– vs. Supply Voltage LIN+ 99.8 LIN– 99.7 99.6 4.5 5.0 5.5 Supply Voltage (V) 6.0 1301 Device Symmetry vs. Supply Voltage 100.0 99.9 99.8 Symmetry (%) Symmetry (%) 99.7 99.6 99.5 99.4 99.3 99.2 99.1 99.0 4.5 100.5 100.4 100.3 100.2 100.1 100.0 99.9 99.8 99.7 99.6 5.0 5.5 Supply Voltage (V) 6.0 99.5 4.5 1302 Device Symmetry vs. Supply Voltage 5.0 5.5 Supply Voltage (V) 6.0 Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 6 A1301 and A1302 Continuous-Time Ratiometric Linear Hall Effect Sensors Package LH, 3-Pin; (SOT-23W) 3.00 .118 2.70 .106 0.15 [.006] M C A B 3.04 .120 2.80 .110 A A 1.49 .059 NOM 8º 0º 0.20 .008 0.08 .003 3 B B 2.10 .083 1.85 .073 Preliminary dimensions, for reference only Dimensions in millimeters U.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 protrusions Exact case and lead configuration at supplier discretion within limits shown A Hall element (not to scale) B Active Area Depth 0.28 [.011] 3X 0.10 [.004] C 3X 0.50 .020 0.30 .012 0.20 [.008] M C A B 0.95 .037 1.90 .075 A 0.96 .038 A NOM 0.60 .024 0.25 .010 1 2 0.25 .010 SEATING PLANE 1.17 .046 0.75 .030 0.15 .006 0.00 .000 C SEATING PLANE GAUGE PLANE Pin-out Drawings Package LH 3 Package UA 1 2 1 2 3 Terminal List Symbol VCC VOUT GND Number Package LH Package UA 1 1 2 3 3 2 Description Connects power supply to chip Output from circuit Ground Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com 7 A1301 and A1302 Continuous-Time Ratiometric Linear Hall Effect Sensors Package UA, 3-Pin SIP .164 4.17 .159 4.04 C D .0805 2.04 NOM .0565 1.44 NOM D .062 1.57 .058 1.47 D .122 3.10 .117 2.97 B .085 2.16 MAX .031 0.79 REF A .640 16.26 .600 15.24 .017 0.44 .014 0.35 1 2 3 .019 0.48 .014 0.36 .050 1.27 NOM Dimensions in inches Metric dimensions (mm) in brackets, for reference only A Dambar removal protrusion (6X) B Ejector mark on opposite side C Active Area Depth .0195 [0.50] NOM D Hall 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 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 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 infringement 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) 853-5000 www.allegromicro.com 8