AK8789

Monolithic Hall Effect ICs　AK-series AK8789 Shipped in packet-tape reel(10000pcs/Reel) AK8789 is ultra-small Hall effect IC of a single silicon chip composed of Hall element and a signal processing IC. Unipolar Hall Effect Switch Two output for S and N-pole Supply Voltage 1.6～5.5Ｖ Hall Element Pulse Excitation High Sensitivity Bop：2.5mT Output CMOS Two output for S and N-pole SON Notice:It is requested to read and accept "IMPORTANT NOTICE" written on the back of the front cover of this catalogue. ●Features ・High sensitive omnipolar operation ・Dual output ・Micropower operation 　Typ.6.5μA（average:VDD=1.85V） ・Ultra small SON package : 1.1×1.4×t0.37mm 　Halogen free ●Operational Characteristics VOUT1 VOUT2 H VOH S or N H VOH Package top BhN BhS L VOL Package bottom 0 N or S BrpN BopN Magnetic flux density L N S VOL BopS BrpS 0 Magnetic flux density ●Functional Block Diagram 1：VDD Item Switch OSC Dynamic Offset Cancellation 4：OUT1 （N pole） OSC Hall Chopper & Element SW Timing Logic 25 Function Generates operating clock Timing Logic Generates timing signal requires for Chopper SW, AMP and other circuits Hall Element Hall element fabricated by CMOS process 3：OUT2 （S pole） AMP Schmitt Output Trigger Stage & Latch 2：VSS Chopper SW Performs chopping in order to cancel the offset voltage of Hall sensor AMP Reduce offset voltage and amplifies Hall output voltage Schmitt Trigger Hysteresis comparator Latch Logic CMOS output, During the power down mode, output Output Stage is latched in its previous state AK8789 •Please be aware that our products are not intended for use in life support equipment, devices, or systems. Use of our products in such applications requires the advance written approval of our sales staff. Certain applications using semiconductor devices may involve potential risks of personal injury, property damage or loss of life. In order to minimize these risks, adequate design and operating safeguards should be provided by the customer to minimize inherent or procedural hazards. Inclusion of our products in such applications is understood to be fully at the risk of the customer using our devices or systems. a ●Absolute Maximum Ratings Item symbol Min. Max. Unit Power supply voltage VDD ー0.3 ＋6.5 V Output current IOUT ー0.5 ＋0.5 mA Storage temperature TSTG ー55 ＋125 ℃ Note) Stresses beyond these listed values may cause permanent damage to the device. ●Recommended Operating Conditions Item symbol Min. Typ. Max. Unit Power supply voltage VDD 1.6 1.85 5.5 V Operating temperature Ta ー30 ＋85 ℃ f ●Electrical Characteristics（Ta=25℃ VDD =1.85V） Item symbol Current consumption IDD High level output voltage VOH Min. Typ. Max. Unit Note 6.5 9 μA Average VDD ー0.4 V IOUT =ー0.5mA 0.4 V IOUT =＋0.5mA 100 ms Low level output voltage VOL Pulse drive period TPD1 25 50 Pulse drive time TPD2 73 146 292 μs ●Magnetic Characteristics①（Ta=25℃ VDD =1.85V） Item Operating points Releasing points Hysteresis symbol Min. Typ. Max. Unit BopN 1.4 2.5 3.2 mT BopS ー3.2 ー2.5 ー1.4 mT BrpN 1.2 2.0 3.0 mT BrpS ー3.0 ー2.0 ー1.2 mT BhN,BhS 0.1 0.5 k mT Note) The above specifications are guaranteed by design. ●Magnetic Characteristics②（Ta=−30∼＋85℃ VDD =1.6∼5.5V） Item Operating points Releasing points Hysteresis symbol Min. Typ. Max. Unit BopN ＊1.3 2.5 3.9 mT BopS ー3.9 ー2.5 ＊ー1.3 mT BrpN 0.9 2.0 ＊3.7 mT BrpS ＊ー3.7 ー2.0 ー0.9 mT BhN,BhS ＊0.1 0.5 n o mT Note) The characteristics with ＊marks are guaranteed by design. p 26 AK8789 ●Package（Unit:mm) ●Footprint（for reference) 0.80 0.80 0.50 No. 1 2 3 4 Pin name VDD VSS OUT2 OUT1 (0.23) (0.125) 0.37 Sensor Center 0.22 1.70 1.00 0.60 1.40 1.40 0.60 0.35 0.20 1.10 0.22 ※Note 1) Sensitive area position referenced to the center of package within φ0.3mm circle. Note 2) Tolerances of dimension otherwise noted is ±0.05mm. Note 3) Hatched area is plated. Note 4) Center pad area (TAB) should be tied to the VSS or floating 0.50 Function Note Power supply Ground S pole detection output CMOS Output N pole detection output CMOS Output ●IDD Timing Chart ●Functional Timing Chart IDD IDD 50ms（typ.） IDD ON （typ＝1.8mA） 146μs（typ.） t B Bop IDD （typ＝6.5μA） IDD OFF （typ＝1.3μA） VOUT High Time t B Brp 48.8μs（typ.） t Low VOUT High 48.8μs（typ.） Low t Operating Point Timing t Releasing Point Timing Note) Hall effect IC's output is held as internal data just before the internal circuit turns off. And after 48.8ms (typ.) the output changes. 27 t AK8789 a ●Typical Characteristics Data (for reference) 18 6 BopN BrpN 14 12 2 0 -2 10 8 6 4 -4 -6 -30 -20 -10 VDD =1.85V VDD =3.0V VDD =5.5V 16 IDD［μA］ Bop, Brp［mT］ 4 BrpS BopS 2 0 10 20 30 40 50 60 70 80 90 0 -30 -20 -10 0 10 20 30 40 50 60 70 80 90 Ambient Temperature Ta ［℃］ Bop, Brp vs. Ta(VDD=1.85V) Ambient Temperature Ta ［℃］ IDD vs. Ta Temperature dependence of sensitivity Temperature dependence of current consumption（Average） f ●Application Circuit VDD =1.85V CMOS Output（N） VDD OUT1 0.1μF AK8789 VSS OUT2 GND k CMOS Output（S） n o p 28 IMPORTANT NOTICE ● These products and their specifications are subject to change without notice. When you consider any use or application of these products, please make inquiries the sales office of Asahi Kasei Microdevices Corporation (AKM) or authorized distributors as to current status of the products. ● Descriptions of external circuits, application circuits, software and other related information contained in this document are provided only to illustrate the operation and application examples of the semiconductor products. You are fully responsible for the incorporation of these external circuits, application circuits, software and other related information in the design of your equipments. AKM assumes no responsibility for any losses incurred by you or third parties arising from the use of these information herein. AKM assumes no liability for infringement of any patent, intellectual property, or other rights in the application or use of such information contained herein. ● Any export of these products, or devices or systems containing them, may require an export license or other official approval under the law and regulations of the country of export pertaining to customs and tariffs, currency exchange, or strategic materials. ● AKM products are neither intended nor authorized for use as critical componentsNote1) in any safety, life support, or other hazard related device or systemNote2), and AKM assumes no responsibility for such use, except for the use approved with the express written consent by Representative Director of AKM. As used here: Note1) A critical component is one whose failure to function or perform may reasonably be expected to result, whether directly or indirectly, in the loss of the safety or effectiveness of the device or system containing it, and which must therefore meet very high standards of performance and reliability. Note2) A hazard related device or system is one designed or intended for life support or maintenance of safety or for applications in medicine, aerospace, nuclear energy, or other fields, in which its failure to function or perform may reasonably be expected to result in loss of life or in significant injury or damage to person or property. ● It is the responsibility of the buyer or distributor of AKM products, whodistributes, disposes of, or otherwise places the product with a third party, to notify such third party in advance of the above content and conditions, and the buyer or distributor agrees to assume any and all responsibility and liability for and hold AKM harmless from any and all claims arising from the use of said product in the absence of such notification. April 1, 2015