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A1360, A1361, and A1362

A1360, A1361, and A1362
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A1360, A1361, and A1362

Product catalog summary
Overview: The document provides technical specifications and operational details for the Allegro A1360, A1361, and A1362 Low-Noise Programmable Linear Hall Effect Sensor ICs. These sensors are designed for high accuracy and increased bandwidth, suitable for applications like current measurement. They feature adjustable bandwidth up to 50 kHz and offer temperature stability and sensitivity adjustments.
Specifications: The sensors provide a voltage output proportional to the magnetic field, with quiescent output voltage adjustable around 50% or 10% of the supply voltage. Sensitivity ranges are 0.7 to 1.4 mV/G for A1360, 1.4 to 4.5 mV/G for A1361, and 4.5 to 16 mV/G for A1362. The bandwidth can be tuned to less than 50 kHz using a capacitor on the FILTER pin.
Features and Benefits: Key features include a 1 mm case thickness for better coupling in current sensing applications, programmable offset and sensitivity, selectable unipolar or bipolar quiescent voltage levels, and a wide ambient temperature range from -40°C to 150°C. The sensors are resistant to mechanical stress and offer temperature-stable output and sensitivity.
Functional Block Diagram: The IC integrates a Hall element, temperature-compensation circuitry, a high-gain amplifier, a low-impedance output stage, and a dynamic offset cancellation technique.
Electrical Characteristics: The supply voltage ranges from 4.5 to 5.5 V, with a supply current of up to 12 mA. The internal bandwidth is 50 kHz, and the output characteristics include a propagation delay time of 1.6 μs and a rise time of 5.5 μs.
Operating Characteristics: The sensors operate over a full temperature range with a quiescent voltage output drift of ±20 mV for A1360 and A1361, and ±60 mV for A1362. Sensitivity drift due to package hysteresis is less than ±1%.
Thermal Characteristics: The package thermal resistance is 174 ºC/W, and power dissipation varies with ambient temperature.
Graphical Data: Graphs illustrate the relationship between filter capacitance and bandwidth, noise, and power-on time for both unidirectional and bidirectional devices.
Programming Guidelines: The document outlines programming guidelines for the sensors, involving setting parameters through pulse trains transmitted via the VOUT pin. Programming involves using specific voltage levels and sequences to adjust internal settings, with options for permanent settings by blowing fuses.
Programming Pulse Requirements: Key parameters include programming voltage levels, current requirements, and pulse widths. The document specifies the voltage and current requirements for programming pulses at a temperature of 25°C.
Zone and Fuse Blowing: The programming logic accepts key-code combinations for addressing registers in two zones. Fuses are blown by applying high voltage pulses to permanently set parameters.
Parameter Selection and Bit Field Addressing: Parameters are accessed through registers located in two zones, with specific pulse sequences used for selection. The document provides a detailed explanation of how to address and blow fuses for specific parameter values.
Programming Procedures: Procedures include Hold Mode, Try Mode, Blow Mode, and Lock Mode, each allowing different levels of parameter testing and setting.
Current Sensor Construction: Instructions are provided for constructing a current sensor using the A136x series, involving passing a current-carrying wire through a magnetic core.
Flux Density and Core Gap: The document explains how the flux density measured by the sensor is affected by the size of the gap in the core, with figures illustrating the relationship between gap size and flux density.
Improving Accuracy with FILTER Pin: For low-frequency applications, adding an RC filter to the sensor output can improve signal-to-noise ratio. The A136x includes a FILTER pin that allows for an internal resistor and buffer amplifier setup.
Package and Dimensions: Detailed dimensions and packaging information are provided, emphasizing the importance of precise alignment and housing considerations in application design.
Legal and Usage Notes: Allegro MicroSystems provides a disclaimer regarding the use of their products in life support devices and advises verifying the currency of the document information before use.
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Catalog excerpts

A1360, A1361, and A1362-1

A1360, A1361, and A1362 Low-Noise Programmable Linear Hall Effect Sensor ICs with Adjustable Bandwidth (50 kHz Maximum) and Analog Output Features and Benefits • mm case thickness provides greater coupling for current 1 sensing applications • Customer programmable offset and sensitivity • Factory programmed 0% / °C sensitivity temperature coefficient • Programmability at end-of-line • Selectable unipolar or bipolar quiescent voltage levels • Selectable sensitivity ranges between 0.7 and 1.4 mV/G (A1360), 1.4 to 4.5 mV/G (A1361) and 4.5 to 16 mV/G (A1362) • Device bandwidth selectable under 50 kHz, via capacitor on FILTER pin • Ratiometric sensitivity, quiescent voltage output, and clamps for interfacing with application DAC • Temperature-stable quiescent voltage output and sensitivity • Precise recoverability after temperature cycling • Output voltage clamps provide short circuit diagnostic capabilities • Wide ambient temperature range: – 40°C to 150°C • Resistant to mechanical stress New applications for linear output Hall effect sensing, such as current measurement, require both high accuracy and increased sensor bandwidth. The Allegro™ A1360, A1361, and A1362 programmable linear Hall effect sensor ICs are designed specifically to achieve both goals. Available in a through-hole SIP (single in-line package), the A136x Hall effect sensor ICs are sensitive and temperature-stable. The accuracy of these devices is enhanced via programmability on the device VOUT pin. A capacitor to ground on the FILTER pin on the A136x can be used to tune the device bandwidth in a range less than 50 kHz. These ratiometric Hall effect sensor ICs provide a voltage output that is proportional to the applied magnetic field. The quiescent output voltage is user-adjustable around either 50% (bidirectional configuration) or 10% (unidirectional configuration) of the supply voltage, VCC. The device sensitivity is adjustable within three guaranteed ranges: 0.7 to 1.4 mV/G (A1360), 1.4 to 4.5 mV/G (A1361), and 4.5 to 16 mV/G (A1362). Package: 4 pin SIP (suffix KT) 1 mm case thickness Each BiCMOS monolithic circuit integrates a Hall element, temperature-compensation circuitry to reduce the intrinsic sensitivity drift of the Hall element, a small-signal high-gain amplifier, a clamped low-impedance output stage, and a proprietary dynamic offset cancellation technique. Continued on the next page… Functional Block Diagram V+ To subcircuits Ratiometric Hall Drive Program/Lock Trim Control Sensitivity Temperature Coefficient Signal Recovery Dynamic Offset Cancellation VOUT (Programming)

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A1360, A1361, and A1362-2

Low-Noise Programmable Linear Hall Effect Sensor ICs with Adjustable Bandwidth (50 kHz Maximum) and Analog Output Description (continued) The features of these linear Hall effect sensor ICs make them ideal for meeting high accuracy requirements in automotive and industrial applications. Device specifications guaranteed over an extended ambient temperature range: –40°C to 150°C. The A136x sensor ICs are provided in an extremely thin case (1 mm thick), 4-pin SIP (single in-line package, suffix KT) that is lead (Pb) free, with 100% matte tin leadframe plating. Selection Guide1 Sensitivity Range...

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A1360, A1361, and A1362-3

Low-Noise Programmable Linear Hall Effect Sensor ICs with Adjustable Bandwidth (50 kHz Maximum) and Analog Output OPERATING CHARACTERISTICS valid over full operating temperature range, TA; CBYPASS = 0.1 μF, VCC = 5 V, unless otherwise specied Characteristic Electrical Characteristics Supply Voltage Supply Current Supply Zener Clamp Voltage Internal Bandwidth Filtered Bandwidth Chopping Frequency2 Output Characteristics tRESPONSE tCLP VCLP(HIGH) Output Voltage Clamp3 VCLP(LOW) DC Output Resistance Output Load Resistance Output Load Capacitance Phase Shift5 Output Slew Rate6 Test Conditions No...

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A1360, A1361, and A1362-4

Low-Noise Programmable Linear Hall Effect Sensor ICs with Adjustable Bandwidth (50 kHz Maximum) and Analog Output OPERATING CHARACTERISTICS (continued) valid over full operating temperature range, TA; CBYPASS = 0.1 μF, VCC = 5 V, unless otherwise specied Characteristic Pre-Programming Target7 Pre-Programming Quiescent Voltage Output Pre-Programming Sensitivity VCLP(LOW) VOUT(Q)PRE Quiescent Voltage Output Programming VOUT(Q)UNIinit Initial Quiescent Voltage Output8 VOUT(Q)BIinit Coarse Quiescent Voltage Output Programming Bits9 VOUT(Q)UNI Guaranteed Quiescent Voltage Output Range10,11 VOUT(Q)BI...

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A1360, A1361, and A1362-5

Low-Noise Programmable Linear Hall Effect Sensor ICs with Adjustable Bandwidth (50 kHz Maximum) and Analog Output OPERATING CHARACTERISTICS (continued) valid over full operating temperature range, TA; CBYPASS = 0.1 μF, VCC = 5 V, unless otherwise specied Characteristic Drift Characteristics Test Conditions A1360 Quiescent Voltage Output Drift Through Temperature Range1 Sensitivity Drift Due to Package Hysteresis1 A1361 VOUT(Q) = 2.5 V; Sens = Sens(min) A1360 A1361 VOUT(Q) = 2.5 V; Sens = Sens(max) A1362 TA = 25°C, after temperature cycling See Characteristic Definitions section. fC varies up...

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A1360, A1361, and A1362-6

Low-Noise Programmable Linear Hall Effect Sensor ICs with Adjustable Bandwidth (50 kHz Maximum) and Analog Output Thermal Characteristics may require derating at maximum conditions Characteristic Package Thermal Resistance Test Conditions* 1-layer PCB with copper limited to solder pads *Additional thermal information available on Allegro website. Power Dissipation versus Ambient Temperature 900 800 Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

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A1360, A1361, and A1362-7

Low-Noise Programmable Linear Hall Effect Sensor ICs with Adjustable Bandwidth (50 kHz Maximum) and Analog Output Characteristic Data BW(max) 10 Guaranteed Range 1 10 100 1000 Capacitance External Capacitor on FILTER Pin, CF (nF) Step Response Sens = 2.2 mV/G Output (mV) 350 G Excitation Signal Allegro MicroSystems, LLC 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

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