A1391, A1392, A1393, and A1395 Micro Power 3 V Linear Hall Effect Sensors withTri-State Output and User-Selectable Sleep Mode Features and Benefits Description High-impedance output during sleep mode The A139x family of linear Hall effect sensor integrated circuits Compatible with 2.5 to 3.5 V power supplies (ICs) provide a voltage output that is directly proportional to 10 mW power consumption in the active mode an applied magnetic field. Before amplification, the sensitivity Miniature MLP/DFN package of typical Hall effect ICs (measured in mV/G) is directly Ratiometric output scales with the ratiometric supply proportional to the current flowing through the Hall effect reference voltage (VREF pin) transducer element inside the ICs. In many applications, it Temperature-stable quiescent output voltage and is difficult to achieve sufficient sensitivity levels with a Hall sensitivity effect sensor IC without consuming more than 3 mA of current. Wide ambient temperature range: 20C to 85C The A139x minimize current consumption to less than 25 A ESD protection greater than 3 kV through the addition of a user-selectable sleep mode. This makes Solid-state reliability these devices perfect for battery-operated applications such as: Preset sensitivity and offset at final test cellular phones, digital cameras, and portable tools. End users can control the current consumption of the A139x by applying a logic level signal to the S L E E P pin. The outputs of the devices are not valid (high-impedance mode) during sleep mode. The Package: 6 pin MLP/DFN (suffix EH) high-impedance output feature allows the connection of multiple A139x Hall effect devices to a single A-to-D converter input. The quiescent output voltage of these devices is 50 % nominal of the ratiometric supply reference voltage applied to the VREF pin of the device. The output voltage of the device is not ratiometric with respect to the SUPPLY pin. Approximate scale Continued on the next page Functional Block Diagram VCC VREF To all subcircuits R / 2 Ratio Hall Element Regulator R / 2 Ratio OUT Amp Out Gain Offset Programming Logic SLEEP Circuit Reference Current GND 1391-DS, Rev. 3 Dynamic Offset Cancellation FilterMicro Power 3 V Linear Hall Effect Sensors with A1391, A1392, A1393, and A1395 Tri-State Output and User Selectable Sleep Mode Description (continued) Despite the low power consumption of the circuitry in the A139x, offset cancellation circuits. End of line, post-packaging, factory programming allows precise control of device sensitivity and the features required to produce a highly-accurate linear Hall effect offset. IC have not been compromised. Each BiCMOS monolithic circuit integrates a Hall element, improved temperature-compensating These devices are available in a small 2.0 3.0 mm, 0.75 mm nominal circuitry to reduce the intrinsic sensitivity drift of the Hall element, height microleaded package (MLP/DFN). It is Pb (lead) free, with a small-signal high-gain amplifier, and proprietary dynamic 100% matte tin leadframe plating. Selection Guide Sensitivity Part Number Packing (mV / G, Typ.) A1391SEHLT-T 7-in. reel, 3000 pieces/reel 1.25 A1392SEHLT-T 2.50 7-in. reel, 3000 pieces/reel A1393SEHLT-T 5 7-in. reel, 3000 pieces/reel A1395SEHLT-T 10 7-in. reel, 3000 pieces/reel Absolute Maximum Ratings* Supply Voltage V 8V CC Reverse-Supply Voltage V 0.1 V RCC Ratiometric Supply Reference Voltage V 7V REF Reverse-Ratiometric Supply Reference Voltage V 0.1 V RREF Logic Supply Voltage V (V > 2.5 V) 32 V S L E E P CC Reverse-Logic Supply Voltage V 0.1 V RS L E E P Output Voltage V V + 0.1 V OUT CC Reverse-Output Voltage V 0.1 V ROUT Operating Ambient Temperature T Range S 20 to 85 C A Junction Temperature T (MAX) 165 C J StorageTemperature T 65 to 170 C stg *All ratings with reference to ground Terminal List Table Pin-out Diagram Pin Name Function VCC 1 6 VREF 1 VCC Supply OUT 2 5 SLEEP GND34 GND 2 OUT Output 3 GND Ground 4 GND Ground 5 S L E E P Toggle sleep mode 6 VREF Supply for ratiometric reference Allegro MicroSystems, Inc. 2 115 Northeast Cutoff, Box 15036 Worcester, Massachusetts 01615-0036 (508) 853-5000 www.allegromicro.com