PDF《A1301 and A1302》

Description TheA1301 andA1302 are continuous-time, ratiometric, linear Hall-effectsensorICs.

Theyareoptimizedtoaccuratelyprovide 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 ClassA 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 C40°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, CT) with 100% matte tin plated leadframes. A1301-DS, Rev.

17 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 Continuous-Time Ratiometric Linear Hall Effect Sensor ICs Functional Block Diagram Not to scale Packages:

3 pin SOT23W (suffix LH), and

3 pin SIP (suffix UA) A1301 and A1302 Amp GND VOUT VC To all subcircuits C Out Offset Trim Control Gain V+ Filter CBYPASS Continuous-Time Ratiometric Linear Hall Effect Sensor ICs A1301 and A1302

2 Allegro MicroSystems, Inc.

115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000;

www.allegromicro.com Selection Guide Part Number Packing* Package Ambient, TA Sensitivity (Typical) A1301EUA-T Bulk,

500 pieces/bag SIP C40?C to 85?C 2.5 mV/G A1301KLHLT-T 7-in. tape and reel,

3000 pieces/reel Surface Mount C40?C to 125?C A1301KUA-T Bulk,

500 pieces/bag SIP A1302ELHLT-T 7-in. tape and reel,

3000 pieces/reel Surface Mount C40?C to 85?C 1.3 mV/G A1302KLHLT-T 7-in. tape and reel,

3000 pieces/reel Surface Mount C40?C to 125?C 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 C0.1 V Reverse Output Voltage VROUT C0.1 V Output Sink Current IOUT

10 mA Operating Ambient Temperature TA Range E C40 to

85 ?C Range K C40 to

125 ?C Maximum Junction Temperature TJ(max)

165 ?C Storage Temperature Tstg C65 to

170 ?C Continuous-Time Ratiometric Linear Hall Effect Sensor ICs A1301 and A1302

3 Allegro MicroSystems, Inc.

115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000;

www.allegromicro.com Terminal List Symbol Number Description Package LH Package UA VCC

1 1 Connects power supply to chip VOUT

2 3 Output from circuit GND

3 2 Ground Package LH Package UA Pin-out Drawings

2 3

1 2

1 3 Continuous-Time Ratiometric Linear Hall Effect Sensor ICs A1301 and A1302

4 Allegro MicroSystems, Inc.

115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000;

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 C

6 V Supply Current ICC Output open C C

11 mA Output Voltage VOUT(High) ISOURCE = C1 mA, Sens = nominal 4.65 4.7 C V VOUT(Low) ISINK =

1 mA, Sens = nominal C 0.2 0.25 V Output Bandwidth BW C

20 C 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 C

3 5 μs Output Resistance ROUT ISINK ≤

1 mA, ISOURCE ≥ C1 mA C

2 5 Ω Wide Band Output Noise, rms VOUTN External output low pass filter ≤

10 kHz;

Sens = nominal C

150 C μV Ratiometry Quiescent Output Voltage Error with respect to ?VCC

1 ΔVOUTQ(V) TA = 25°C C C ±3.0 % Magnetic Sensitivity Error with respect to ?VCC

2 ΔSens(V) TA = 25°C C C ±3.0 % Output Linearity Lin TA = 25°C C C ±2.5 % Symmetry Sym TA = 25°C C 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 C 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 C 3.2 mV/G A1302 0.85 C 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

5 Allegro MicroSystems, Inc.

115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000;

www.allegromicro.com Characteristic Definitions 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, ?VOUTQ, which is a function of both ?VCC and ?TA. For purposes of specifica- tion, the quiescent output voltage as a function of tempera........