Monolithic Hall Effect ICs AK-series AK8771 Shipped in packet-tape reel(5000pcs/Reel) AK8771 is ultra-small Hall effect IC of a single silicon chip composed of Hall element and a signal processing IC. Bipolar Hall Supply Voltage Power down Effect Latch 1.65.5 Function Output Ultra High Sensitivity Bop1.8mT SON CMOS Notice:It is requested to read and accept "IMPORTANT NOTICE" written on the back of the front cover of this catalogue. Features Precision Bipolar Hall Effect Latch Power manageability through "PDN" pin Current consumption in Power down mode is less than 1A Ultra small SON package : 1.1x1.4xt0.37mm, Halogen free Operational Characteristics Vout H VoH S or N Package top Bh Package bottom L VOL S N or S Brp 0 Bop N Magnetic flux density Functional Block Diagram 1VDD Item 3PDN Switch OSC Function Generates operating clock Dynamic Offset Cancellation Timing logic Generates timing signal requires for Chopper SW, AMP and COMP 4OUT Hall Element Hall element fabricated by CMOS process Chopper SW Performs chopping in order to cancel the offset voltage of Hall sensor OSC Hall Chopper & Element SW Timing Logic 15 AMP Schmitt Trigger & Latch Latch Logic Output Stage 2VSS AMP Reduce offset voltage and amplifies Hall output voltage Schmitt Trigger Hysteresis comparator Output Stage CMOS output, During the power down mode, output is latched in its previous state AK8771 *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. c Absolute Maximum Ratings symbol Min. Max. Power supply voltage VDD 0.3 6.5 V Output current IOUT 0.5 0.5 mA OUT pin Item Unit 0.3 Note Input voltage VIN 0.3 V PDN pin Input IIN 10 10 mA PDN pin TSTG 55 125 current Storage temperature VDD ) Less than +6.5V. Note) Stress 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 3.0 5.5 V Operating temperature Ta 30 85 g Electrical CharacteristicsTa=25 VDD=3.0V Item symbol Current consumption 1 IDD1 Current consumption 2 IDD2 Min. Typ. 2.5 PDN Input current IIN 1 PDN input H voltage VIH 0.7VDD PDN input L voltage VIL High Level output voltage VOH Low level output voltage VOL PDN mode transition time 1 PDN mode transition time 2 Note Max. Unit 1 A PDN=0V 6 mA PDN=VDD 1 A V 0.3 VDD0.4 V V Iout=0.5mA 0.4 V Iout=0.5mA TPD1 100 s ActivePDN TPD2 100 s PDNActive k Magnetic CharacteristicsTa=25 VDD=3.0V Item symbol Operating point Bop Releasing point Brp Hysteresis Bh Min. Typ. Max. Unit 1.8 4.0 mT 4.0 1.8 mT 3.6 mT Magnetic CharacteristicsTa=-3085 VDD=1.65.5V Item symbol Operating point Bop Releasing point Brp Hysteresis Bh Min. Typ. Max. Unit 1.8 4.2 mT 4.2 1.8 mT 3.6 mT n o p Note) The specifications in Magnetic Characteristics are design targets. 16 AK8771 PackageUnit:mm) Footprintfor reference) 0.80 Pin name Function VDD Power supply pin VSS Ground pin PDN Power down pin. H:Device active L:Device power down OUT Output pin 4 0.22 ! 0.220.05 0.500.05 Note 1) Sensitive area position referenced to the center of package within 0.3mm 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 (0.23) (0.125) 0.37 Sensor Center Note CMOS Input. This pin has to be tied to H level when external power control is not used. CMOS Output Function Timing Chart Application Circuit BmT N Bop 0 Brp S VPDNV VDD=3.0V t VDD 100nF 0 CMOS Output OUT AK8771 t TPD2100s VOUTV 0 VSS TPD2100s Undefined t TPD1100s TPD1100s IDDmA 0 t Functional Timing Note1) During power down mode, output is latched in its previous state. Note2) When VDD is supplied, the time from reaching VDD=1.6V to the update of the output state is equal to TPD2. 17 PDN GND CMOS Input 1.70 1.00 0.60 1.40 ! No. 1 2 3 0.350.10 " 0.80 1.40 " 0.50 0.60 0.20 1.10 AK8771 Typical Characteristic Datafor reference 4 4 Bop Brp 3 Bop, BrpmT Bop, BrpmT 1 0 -1 1 0 -1 -2 -2 -3 -3 0 10 20 30 40 50 60 70 80 -4 -30 -20 -10 90 0 Bop Brp 3 40 50 60 70 80 90 Bop Brp 2 Bop, BrpmT Bop, BrpmT 30 3 2 1 0 -1 0 -1 -2 -2 -3 -3 0 10 20 30 40 50 60 70 80 g 1 -4 -30 -20 -10 90 0 10 20 30 40 50 60 70 80 90 Ambient Temperature Ta Bop, Brp vs. Ta(VDD=5.5V) Ambient Temperature Ta Bop, Brp vs. Ta(VDD=2.0V) 5 5 VDD=5.5V VDD=3.0V VDD=2.0V VDD=1.6V -30 0 4 k 25 IDD2mA 4 IDD2mA 20 4 4 3 2 1 0 -30 -20 -10 10 Ambient Temperature Ta Bop, Brp vs. Ta(VDD=3.0V) Ambient Temperature Ta Bop, Brp vs. Ta(VDD=1.6V) -4 -30 -20 -10 c 2 2 -4 -30 -20 -10 Bop Brp 3 85 3 2 1 0 10 20 30 40 50 60 Ambient Temperature Ta IDD2 vs. Ta(in various VDD) 70 80 90 0 1 2 3 4 5 6 VDDV IDD2 vs.VDD Ta(in various Ta) n o p 18 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, who distributes, 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 4, 2012