The A132X family of linear Hall-effect sensors are optimized, sensitive, and temperature-stable. These ratiometric Hall-effect sensors provide a voltage output that is proportional to the applied magnetic field. The A132X family has a quiescent output voltage that 50% of the supply voltage and output sensitivity options 2.5mV/G, 3.125mV/G, and 5mV/G. The features of this family of devices are ideal for use in the harsh environments found in automotive and industrial linear and rotary position sensing systems. Each device has a BiCMOS monolithic circuit which integrates a Hall element, improved temperature-compensating circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, and a rail-to-rail lowimpedance output stage. A proprietary dynamic offset cancellation technique, with an internal high-frequency clock, reduces the residual offset voltage normally caused by device overmolding, temperature dependencies, and thermal stress. The high frequency clock allows for a greater sampling rate, which results in higher accuracy and faster signal processing capability. This technique produces devices that have an extremely stable quiescent output voltage, are immune to mechanical stress, and have precise recoverability after temperature cycling. Having the Hall element and an amplifier on a single chip minimizes many problems normally associated with low-level analog signals. Output precision is obtained by internal gain and offset trim adjustments made at end-of-line during the manufacturing process. The A132X family is provided a 3-pin single in-line package (UA) and a 3-pin surface mount package (LH).

Supply Voltage, VCC.......................................... 8 V* Reverse-Battery Voltage, VRCC....................... �0.1 V Reverse-Output Voltage, VROUT..................... �0.1 V Output Sink Current, IOUT............................. 10 mA Operating Temperature Ambient, TA, Range E.................. to 85�C Ambient, TA, Range L................ to 150�C Maximum Junction, TJ(max)........................165�C Storage Temperature, TS.................. to 170�C

Temperature-stable quiescent output Improved sensitivity voltage 5.5 V operation Precise recoverability after temperature cycling Immunity to mechanical stress Output voltage proportional to magnetic flux Solid-state reliability density Robust EMC protection Ratiometric rail-to-rail output

SIP Surface Mount SIP Surface Mount SIP Surface Mount SIP Surface Mount SIP Surface Mount SIP Surface Mount

Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts (508) 853-5000 www.allegromicro.com

current draw may be observed at voltages above the minimum supply Zener clamp voltage, VZ(min), due to the Zener diode turning on.

Terminal List Symbol VCC VOUT GND Description Connects power supply to chip Output from circuit Ground Number Package LH Package UA

Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts (508) 853-5000 www.allegromicro.com

DEVICE CHARACTERISTICS1 over operating temperature (TA) range, unless otherwise noted Characteristic Symbol Test Conditions Min. Electrical Characteristics; VCC 5 V, unless otherwise noted Supply Voltage Vcc(op) Operating; 165�C 4.5 Supply Current Icc = 0, Iout 0 � Quiescent Voltage Vout(q) = 25�C, Iout mA 2.425 Vout(H) B = +X, Iout mA � Output B = �X, Iout mA � Vout(L) 3 Output Source Current Limit Iout(LM) B = �X, Vout 0 �1.0 Supply Zener Clamp Voltage VZ Icc mA = Icc(max) 3 6 Output Bandwidth BW � Clock Frequency fC � Output Characteristics; over VCC range, unless otherwise noted A1321; Cbypass = 0.1 �F, no load � Noise, VN A1322; Cbypass = 0.1 �F, no load � A1323; Cbypass = 0.1 �F, no load � Output Resistance Rout Iout mA � Output Load Resistance RL Iout �1 mA, VOUT to GND 4.7 VOUT to GND � Output Load Capacitance CL

current is defined as conventional current coming out of (sourced from) the specified device terminal. data = 25�C. They are for initial design estimations only, and assume optimum manufacturing and application conditions. Performance may vary for individual units, within the specified maximum and minimum limits. 3 In these tests, the vector X is intended to represent positive and negative fields sufficient to swing the output driver between fully OFF and saturated (ON), respectively. It is NOT intended to indicate a range of linear operation. 4 Noise specification includes both digital and analog noise.

Allegro MicroSystems, Inc. 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts (508) 853-5000 www.allegromicro.com