A1340
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A1340 High Precision Programmable Linear Hall Effect Sensor IC with EEPROM, Analog Output, and Advanced Output Linearization Not for New Design These parts are in production but have been determined to be NOT FOR NEW DESIGN. This classification indicates that sale of this device is currently restricted to existing customer applications. The device should not be purchased for new design applications because obsolescence in the near future is probable. Samples are no longer available. Date of status change: December 14, 2017 Recommended Substitutions: Contact Allegro Marketing NOTE: For detailed information on purchasing options, contact your local Allegro field applications engineer or sales representative. Allegro MicroSystems, LLC reserves the right to make, from time to time, revisions to the anticipated product life cycle plan for a product to accommodate changes in production capabilities, alternative product availabilities, or market demand. The information included herein is believed to be accurate and reliable. However, Allegro MicroSystems, LLC assumes no responsibility for its use; nor for any infringements of patents or other rights of third parties which may result from its use.

A1340High Precision Programmable Linear Hall Effect Sensor IC with EEPROM, Analog Output, and Advanced Output Linearization DESCRIPTION FEATURES AND BENEFITS • Advanced 32-segment output linearization functionality enables high output accuracy and linearity in the presence of non-linear input magnetic fields • Customer adjustable sensitivity and offset, bandwidth, output clamps, and 1st and 2nd order temperature compensation • Simultaneous programming of all parameters for accurate and efficient system optimization • Factory trimmed magnetic input range (coarse sensitivity) and signal...

High Precision Programmable Linear Hall Effect Sensor IC with EEPROM, Analog Output, and Advanced Output Linearization SELECTION GUIDE Part Number ‘Contact Allegro™ for additional packing options Absolute Maximum Ratings 3 Functional Block Diagram 4 Pin-out Diagram and Terminal List 4 Signal Processing Parameter Setting 14 Digital Signal Processing 14 Digital Output Sensitivity (Gain) Adjustment 16 Output Fine Offset Adjustment 16 Output Signal Clamps Setting 18 Programming Serial Interface 19 Writing the Access Code 19 Writing to Non-Volatile EEPROM 19 Writing...

High Precision Programmable Linear Hall Effect Sensor IC with EEPROM, Analog Output, and Advanced Output Linearization SPECIFICATIONS Absolute Maximum Ratings Rating Forward Supply Voltage Reverse Supply Voltage Forward Supply Current Reverse Supply Current Forward Output Voltage (VOUT Pin) Reverse Output Voltage (VOUT Pin) Forward Output Sink Current (VOUT Pin) Maximum voltage depends on programmed voltage settings Maximum Number of EEPROM Write Cycles Operating Ambient Temperature Maximum Junction Temperature Storage Temperature Thermal Characteristics: May require derating at maximum...

High Precision Programmable Linear Hall Effect Sensor IC with EEPROM, Analog Output, and Advanced Output Linearization Functional Block Diagram Terminal list Table 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

High Precision Programmable Linear Hall Effect Sensor IC with EEPROM, Analog Output, and Advanced Output LinearizationELECTRICAL CHARACTERISTICS: Valid through full operating temperature range, TA , and supply voltage, Vcc , Cbypass = 10 nF, unless otherwise specified Characteristics [1] 1 G (gauss) = 0.1 mT (millitesla). [2] See Protection Features section. [3] Capacitor of 10 nF connected between output and ground. [4] Determined by design. [5] Clarity of a Read Acknowledge message from the device to the controller will be affected by the amount of capacitance and wire inductance on the...

High Precision Programmable Linear Hall Effect Sensor IC with EEPROM, Analog Output, and Advanced Output LinearizationMAGNETIC CHARACTERISTICS: Valid across full operating temperature range, TA , and supply voltage range, Vcc , Cbypass = 10 nF; unless otherwise specified characteristics [1] 1 G (gauss) = 0.1 mT (millitesla). [2] Device performance is optimized for the input magnetic range of SENS_COARSE = 4 and input offset of SIG_OFFSET=0. If a different magnetic input range or signal offset is required, please see the tables in the section EEPROM Customer-Programmable Parameter Reference,...

High Precision Programmable Linear Hall Effect Sensor IC with EEPROM, Analog Output, and Advanced Output Linearization PROGRAMMABLE CHARACTERISTICS: Valid through full operating temperature range, TA , and supply voltage, Vcc , Cbypass = 10 nF, unless otherwise specified Continued on the next page... 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

High Precision Programmable Linear Hall Effect Sensor IC with EEPROM, Analog Output, and Advanced Output LinearizationPROGRAMMABLE CHARACTERISTICS (continued): Valid through full operating temperature range, TA , and supply voltage, Vcc , cBYPASS = 10 nF, unless otherwise specified characteristics Continued on the next page... 115 Northeast Cutoff Worcester, Massachusetts 01615-0036 U.S.A. 1.508.853.5000; www.allegromicro.com

High Precision Programmable Linear Hall Effect Sensor IC with EEPROM, Analog Output, and Advanced Output LinearizationPROGRAMMABLE CHARACTERISTICS (continued): Valid through full operating temperature range, TA , and supply voltage, Vcc , cBYPASS = 10 nF, unless otherwise specified characteristics [1] 1 G (gauss) = 0.1 mT (millitesla). [2] Determined by design. [3] The unit m%/C means: (10-3 * %) / C. [41 The unit m%/C2 means: (10-3 * %) / C2. [5] Clamp_High minimum value trim can not be lower than QVO trim. Clamp_Low maximum value trim can not be higher than QVO trim. 115 Northeast Cutoff...

High Precision Programmable Linear Hall Effect Sensor IC with EEPROM, Analog Output, and Advanced Output Linearization CHARACTERISTIC PERFORMANCE Average Supply Current versus Supply Voltage Average Supply Current (On) versus Temperature 12.0 Supply Current, ICC(av) (mA) Supply Current, ICC(av) (mA) Output Saturation Voltage (Low) versus Average Supply Voltage Output Saturation Voltage, VSAT(L) (mV) Output Saturation Voltage, VSAT(L) (mV) Output Saturation Voltage (Low) versus Average Temperature Output Saturation Voltage, VSAT(H) (mV) Output Saturation Voltage (High) versus Average...