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Resumen del manual
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 Packages: 3 pin SOT23W (suffix LH), and 3 pin SIP (suffix UA) Not to scale 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. Functional Block Diagram AmpGNDVCCOutOffsetTrimControlGainV+ VoltageRegulatorFilterCBYPASS VOUT A1301-DS, Rev. 5 A1301 and Continuous-Time Ratiometric A1302 Linear Hall Effect Sensors Selection Guide Part Number Pb-free1 Packing2 Package Ambient, TA Sensitivity (Typical) A1301ELHLT-T Yes 7-in. tape and reel, 3000 pieces/reel Surface Mount –40.C to 85.C 2.5 mV/G A1301EUA-T Yes Bulk, 500 pieces/bag SIP A1301KLHLT-T Yes 7-in. tape and reel, 3000 pieces/reel Surface Mount –40.C to 125.C A1301KUA-T Yes Bulk, 500 pieces/bag SIP A1302ELHLT-T Yes 7-in. tape and reel, 3000 pieces/reel Surface Mount –40.C to 85.C 1.3 mV/GA1302EUA-T Yes Bulk, 500 pieces/bag SIP A1302KLHLT-T Yes 7-in. tape and reel, 3000 pieces/reel Surface Mount –40.C to 125.C A1302KUA-T Yes Bulk, 500 pieces/bag SIP 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 Symbol Notes Rating Units Supply Voltage VCC 8 V Output Voltage VOUT 8 V Reverse Supply Voltage VRCC –0.1 V Reverse Supply Voltage VRCC –0.1 V Output Sink Current IOUT 10 mA Operating Ambient Temperature TA Range E –40 to 85 .C Range K –40 to 125 .C Maximum Junction Temperature TJ(max) 165 .C Storage Temperature Tstg –65 to 170 .C Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 A1301 and Continuous-Time Ratiometric A1302 Linear Hall Effect Sensors DEVICE CHARACTERISTICS over operating temperature range, TA, and VCC = 5 V, unless otherwise noted Characteristic Symbol Test Conditions Min. Typ. Max. Units Electrical Characteristics Supply Voltage VCC Running, TJ < 165°C 4.5 – 6 V Supply Current ICC Output open – – 11 mA Output Voltage VOUT(High) ISOURCE = –1 mA, Sens = nominal 4.65 4.7 – V VOUT(Low) ISINK = 1 mA, Sens = nominal – 0.2 0.25 V Output Bandwidth BW – 20 – kHz Power-On Time tPO VCC(min) to 0.95 VOUT; B = ±1400 G; Slew rate = 4.5 V/.s to 4.5 V/100 ns – 3 5 .s Output Resistance ROUT ISINK . 1 mA, ISOURCE . –1 mA – 2 5 .Wide Band Output Noise, rms VOUTN External output low pass filter . 10 kHz; Sens = nominal – 150 – .V Ratiometry Quiescent Output Voltage Error with respect to .VCC1 .VOUTQ(V) TA = 25°C – – ±3.0 % Magnetic Sensitivity Error with respect to .VCC2 .Sens(V) TA = 25°C – – ±3.0 % Output Linearity Lin TA = 25°C – – ±2.5 % Symmetry Sym TA = 25°C – – ±3.0 % Magnetic Characteristics Quiescent Output Voltage VOUTQ B = 0 G; TA = 25°C 2.4 2.5 2.6 V Quiescent Output Voltage over Operating Temperature Range VOUTQ(.TA) B = 0 G 2.2 – 2.8 V Magnetic Sensitivity Sens A1301; TA = 25°C 2.0 2.5 3.0 mV/G A1302; TA = 25°C 1.0 1.3 1.6 mV/G Magnetic Sensitivity over Operating Temperature Range Sens(.TA) A1301 1.8 – 3.2 mV/G A1302 0.85 – 1.75 mV/G 1Refer to equation (4) in Ratiometric section on page 4. 2Refer to equation (5) in Ratiometric section on page 4. Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 A1301 and Continuous-Time Ratiometric A1302 Linear Hall Effect Sensors Character...
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