A1301_V01 ALLEGRO

Document overview

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Technical content

The A1301 and A1302 are continuous-time, ratiometric, linear Hall-effect sensor ICs. 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 circuit, a linear amplifier, and a CMOS Class A output structure. Integrating the Hall circuit 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. A1301-DS, Rev. 24 MCO-0000597

  • 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 Continuous-Time Ratiometric Linear Hall-Effect Sensor ICs Functional Block Diagram A1301 and A1302 Amp GND VOUT VC To all subcircuits C Out Offset Trim Control Gain Filter CBYPASS Not to scale Packages: FEATURES AND BENEFITS DESCRIPTION 3-Pin SOT23W (suffix LH) 3-Pin SIP (suffix UA) March 6, 2020

Continuous-Time Ratiometric Linear Hall-Effect Sensor ICs A1301 and A1302 Allegro MicroSystems

955 Perimeter Road

Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Selection Guide Part Number Packing* Package Ambient, TA Sensitivity (Typical) A1301EUA-T Bulk, 500 pieces/bag SIP –40ºC to 85ºC 2.5 mV/GA1301KLHLT-T 7-in. reel, 3000 pieces/reel Surface Mount –40ºC to 125ºCA1301KLHLX-T 13-in. reel, 10000 pieces/reel Surface Mount A1301KUA-T Bulk, 500 pieces/bag SIP A1302ELHLT-T 7-in. reel, 3000 pieces/reel Surface Mount –40ºC to 85ºC 1.3 mV/G A1302ELHLX-T 13-in. reel, 10000 pieces/reel Surface Mount A1302KLHLT-T 7-in. reel, 3000 pieces/reel Surface Mount –40ºC to 125ºCA1302KLHLX-T 13-in. reel, 10000 pieces/reel Surface Mount A1302KUA-T Bulk, 500 pieces/bag SIP *Contact 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 Output Voltage VROUT –0.1 V Output Sink Current IOUT 10 mA Operating Ambient Temperature TA Range E –40 to 85 ºC Range K –40 to 125 ºC Maximum Junction Temperature TJ(max) 165 ºC Storage Temperature Tstg –65 to 170 ºC SPECIFICATIONS Terminal List Symbol Number DescriptionPackage LH Package UA VCC 1 1 Connects power supply to chip VOUT 2 3 Output from circuit GND 3 2 Ground 2 3121

Continuous-Time Ratiometric Linear Hall-Effect Sensor ICs A1301 and A1302 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com 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/µs to 4.5 V/100 ns – 3 5 µs Output Resistance ROUT ISINK ≤ 1 mA, ISOURCE ≥ –1 mA – 2 5 Ω Wide Band Output Noise, rms VOUTN External output low pass filter ≤ 10 kHz; Sens = nominal – 150 – µV Ratiometry Quiescent Output Voltage Error with respect to ∆VCC1 ΔVOUTQ(V) TA = 25°C – – ±3.0 % Magnetic Sensitivity Error with respect to ∆VCC2 ΔSens(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(ΔTA) 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(ΔTA) 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.

Continuous-Time Ratiometric Linear Hall-Effect Sensor ICs A1301 and A1302 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com CHARACTERISTIC DEFINITIONS 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 ther- mal considerations, there is a tolerance on the quiescent output voltage, ∆VOUTQ, which is a function of both ∆VCC and ∆TA. For purposes of specification, the quiescent output voltage as a func- tion of temperature, ∆VOUTQ(∆TA), is defined as: 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, perpen- dicular 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 sensitiv- ity of the device and is defined as: The stability of the device magnetic sensitivity as a function of ambient temperature, ∆ Sens (∆TA) (%) is defined as: Ratiometric The A1301 and A1302 feature a ratiometric output. This means that the quiescent voltage output, VOUTQ, and the magnetic sen- sitivity, Sens, are proportional to the supply voltage, VCC. The ratiometric change (%) in the quiescent voltage output is defined as: and the ratiometric change (%) in sensitivity is defined as: 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 mea- sured and defined as: and output symmetry as: ∆VOUTQ(∆ΤΑ ) Sens(25ºC) VOUTQ(ΤΑ ) VOUTQ(25ºC) – = (1) VOUT(–B) VOUT(+B) Sens ∆Sens(∆Τ Α ) Sens(ΤΑ ) Sens(25ºC) Sens(25ºC) = × 100% (2) (3) VCC 5 V VOUTQ(VCC) VOUTQ(5V) ∆V OUTQ(∆V) = × 100% (4) VCC 5 V = × 100%∆Sens (∆V) Sens(VCC) Sens(5V) (5) = × 100%Lin+ 2 (VOUT(+B½) – VVOUTQ ) –VOUT(+B) VOUTQ (6) = × 100%Lin– 2(VOUT(–B½) – VOUTQ) –VOUT(–B) VOUTQ (7) = × 100%Sym VOUT(+B) VOUTQ – VOUT(–B) VOUTQ (8)

Continuous-Time Ratiometric Linear Hall-Effect Sensor ICs A1301 and A1302 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com TYPICAL CHARACTERISTICS (30 pieces, 3 fabrication lots) Continued on the next page... 2.35 2.40 2.45 2.50 2.55 2.60 2.65 –50 –25 0 25 50 75 100 125 150 1.24 1.26 1.28 1.30 1.32 1.34 1.36 1.38 1.40 -50 -25 0 25 50 75 100 125 150 2.40 2.45 2.50 2.55 2.60 –50 –25 0 25 50 75 100 125 150 2.40 2.45 2.50 2.55 2.60 –50 –25 0 25 50 75 100 125 150 1301 Device Sensitivity vs. Ambient Temperature 1302 Device Sensitivity vs. Temperature Temperature (°C) Temperature (°C) 1301 Device VOUTQ vs. Ambient Temperature 1302 Device VOUTQ vs. Ambient Temperature 1301 Device Sensitivity vs. Supply Voltage 1302 Device Sensitivity vs. Supply Voltage Supply Voltage (V) Supply Voltage (V) Temperature (°C) Temperature (°C) Sensitivity (mV/G) Sensitivity (mV/G) Output Voltage (V) Output Voltage (V) Sensitivity (mV/G) Sensitivity (mV/G) 1.5 2.0 2.5 3.0 3.5 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7

Continuous-Time Ratiometric Linear Hall-Effect Sensor ICs A1301 and A1302 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com 1301 Device VOUTQ vs. Supply Voltage 4.5 5.0 5.5 6.0 1.5 2.0 2.5 3.0 3.5 4.5 5.0 5.5 6.0 99.0 99.1 99.2 99.3 99.4 99.5 99.6 99.7 99.8 99.9 100.0 4.5 5.0 5.5 6.0 99.5 99.6 99.7 99.8 99.9 100.0 100.1 100.2 100.3 100.4 100.5 4.5 5.0 5.5 6.0 Supply Voltage (V) LIN– LIN+ LIN– LIN+ 99.6 99.7 99.8 99.9 100.0 99.8 99.9 100.0 100.1 100.2 100.3 100.4 1302 Device VOUTQ vs. Supply Voltage 1301 Device Symmetry vs. Supply Voltage 1302 Device Symmetry vs. Supply Voltage 1301 Device LIN+ and LIN– vs. Supply Voltage 1302 Device LIN+ and LIN– vs. Supply Voltage Output Voltage (V) Output Voltage (V) Linearity (%) Linearity (%) Symmetry (%) Symmetry (%) Supply Voltage (V) Supply Voltage (V) Supply Voltage (V) Supply Voltage (V)Supply Voltage (V) 1.5 2.0 2.5 3.0 3.5 TYPICAL CHARACTERISTICS CONTINUED (30 pieces, 3 fabrication lots)

Continuous-Time Ratiometric Linear Hall-Effect Sensor ICs A1301 and A1302 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Figure 1: Package LH, 3-Pin; (SOT-23W) For Reference Only – Not for Tooling Use (Reference DWG-2840) Dimensions in millimeters– NOT TO SCALE Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown A B C D C Reference land pattern layout All pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary to meet application process requirements and PCB layout tolerances Active Area Depth, 0.28 mm Hall elements, not to scale = Last three digits of device part numberN Standard Branding Reference View NNN Branding scale and appearance at supplier discretion Seating Plane Gauge Plane PCB Layout Reference View

0.55 REF

0.25 BSC

0.95 BSC

0.95 1.00 0.70 2.40 B A Branded Face 2.90+0.10 –0.20 4°±4° 8X 10° REF 0.180+0.020 –0.053 0.05 +0.10 –0.05

0.25 MIN

1.91+0.19 –0.06 2.98+0.12 –0.08 1.00 ±0.13 0.40 ±0.10 D D D 1.49 0.96 CUSTOMER OUTLINE DRAWINGS

Continuous-Time Ratiometric Linear Hall-Effect Sensor ICs A1301 and A1302 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com Figure 2: Package UA, 3-Pin SIP For Reference Only – Not for Tooling Use (Reference DWG-9065) Dimensions in millimeters – NOT TO SCALE Dimensions exclusive of mold flash, gate burrs, and dambar protrusions Exact case and lead configuration at supplier discretion within limits shown 231

1.27 NOM

1.02 MAX 0.51 MAX

0.79 REF

B A B C A D E D E E 2.04 1.44 E Branding scale and appearance at supplier discretion Hall element, not to scale Mold Ejector Pin Indent Branded Face 4.09+0.08 –0.05 0.41 +0.03 –0.06 3.02+0.08 –0.05 0.43+0.05 –0.07 14.99 ±0.25 Dambar removal protrusion (6X) Gate and tie bar burr area Active Area Depth, 0.50 mm REF NNN Standard Branding Reference View = Supplier emblem = Last three digits of device part numberN

2 X 45°

C 45°

3 X 10°

1.52 ±0.05

Continuous-Time Ratiometric Linear Hall-Effect Sensor ICs A1301 and A1302 Allegro MicroSystems Manchester, NH 03103-3353 U.S.A. www.allegromicro.com For the latest version of this document, visit our website: www.allegromicro.com

Revision History

Revision Revision Date Description of Revision

18 April 26, 2013 Update UA package drawing

19 January 1, 2015 Add LX option to Selection Guide

20 July 13, 2015 Corrected LH package Active Area Depth value

21 December 1, 2015 Updated product status to “Not for New Design”

22 December 5, 2016 Updated product status to “Last Time Buy”

23 February 14, 2019 Updated product status to “Discontinued”

24 March 6, 2020 Minor editorial updates

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