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[AK8963] ShortDatasheet-E-01 - 1 - 2012/02 AK8963 3-axis Electronic Compass 1. Features A 3-axis electronic compass IC with high sensitive Hall sensor technology. Best adapted to pedestrian city navigation use for cell phone and other portable appliance. Functions:

  • 3-axis magnetometer device suitable for compass application
  • Built-in A to D Converter for magnetometer data out
  • 14-/16-bit selectable data out for each 3 axis magnetic components - Sensitivity: 0.6 µT/LSB typ. (14-bit) 0.15µT/LSB typ. (16-bit)
  • Serial interface - I2C bus interface. Standard mode and Fast mode compliant with Philips I2C specification Ver.2.1 - 4-wire SPI
  • Operation modes: Power-down, Single measurement, Continuous measurement, External trigger measurement, Self test and Fuse ROM access.
  • DRDY function for measurement data ready
  • Magnetic sensor overflow monitor function
  • Built-in oscillator for internal clock source
  • Power on Reset circuit
  • Self test function with built-in internal magnetic source Operating temperatures:
  • -30°C to +85°C Operating supply voltage:
  • Analog power supply +2.4V to +3.6V
  • Digital Interface supply +1.65V to analog power supply voltage. Current consumption:
  • Power-down: 3 µA typ.
  • Measurement: - Average power consumption at 8 Hz repetition rate: 280µA typ. Package: AK8963C 14-pin WL-CSP (BGA): 1.6 mm ´ 1.6 mm ´ 0.5 mm (typ.) AK8963N 16-pin QFN package: 3.0 mm ´ 3.0 mm ´ 0.75 mm (typ.) = Short Datasheet =

[AK8963] ShortDatasheet-E-01 - 2 - 2012/02 2. Overview AK8963 is 3-axis electronic compass IC with high sensitive Hall sensor technology. Small package of AK8963 incorporates magnetic sensors for detecting terrestrial magnetism in the X -axis, Y-axis, and Z-axis, a sensor driving circuit, signal amplifier chain, and an arithmetic circuit for processing the signal from each sensor. Self test function is also incorporated. From its compact foot print and thin package feature, it is suitable for map heading up purpose in GPS-equipped cell phone to realize pedestrian navigation function. AK8963 has the following features: (1) Silicon monolithic Hall-effect magnetic sensor with magnetic concentrator realizes 3-axis magnetometer on a silicon chip. Analog circuit, digital logic, power block and interface block are also integrated on a chip. (2) Wide dynamic measurement range and high resolution with lower current consumption. Output data resolution: 14-bit (0.6 µT/LSB) 16-bit (0.15 µT/LSB) Measurement range: ± 4900 µT Average current at 8Hz repetition rate: 280µA typ. (3) Digital serial interface - I 2C bus interface to control AK8963 functions and to read out the measured data b y external CPU. A dedicated power supply for I2C bus interface can work in low-voltage apply as low as 1.65V . - 4-wire SPI is also supported. A dedicated power supply for SPI can work in low-voltage apply as low as 1.65V . (4) DRDY pin and register inform to system that measurement is end and set of data in registers are ready to be read. (5) Device is worked by on-chip oscillator so no external clock source is necessary. (6) Self test function with internal magnetic source to confirm magnetic sensor operation on end products.

[AK8963] ShortDatasheet-E-01 - 3 - 2012/02 3. Table of Contents

[AK8963] ShortDatasheet-E-01 - 4 - 2012/02 4. Circuit Configuration 4.1. Block Diagram 3-axis Hall sensor MUX SDA/SI DRDY Chopper SW HE-Drive Pre- AMP Integrator & ADC Interface, Logic & Register SCL/SK VDD Voltage Reference Timing Control VID SO OSC1 CSB Magnetic source CAD0 VSS POR FUSE ROM CAD1 TST1 TRIG RSV RSTN OSC2 4.2. Block Function Block Function 3-axis Hall sensor Monolithic Hall elements. MUX Multiplexer for selecting Hall elements. Chopper SW Performs chopping. HE-Drive Magnetic sensor drive circuit for constant-current driving of sensor Pre-AMP Fixed-gain differential amplifier used to amplify the magnetic sensor signal. Integrator & ADC Integrates and amplifies pre-AMP output and performs analog-to-digital conversion. OSC1 Generates an operating clock for sensor measurement. 12MHz(typ.) OSC2 Generates an operating clock for sequencer. 128kHz(typ.) POR Power On Reset circuit. Generates reset signal on rising edge of VDD. Interface Logic & Register Exchanges data with an external CPU. DRDY pin indicates sensor measurement end and data is ready to be read. I2C bus interface using two pins, namely, SCL and SDA. Standard mode and Fast mode are supported. The low-voltage specification can be supported by applying 1.65V to the VID pin. 4-wire SPI is also supported by SK, SI, SO and CSB pins. 4-wire SPI works in VID pin voltage down to 1.65V, too. Timing Control Generates a timing signal required for internal operation from a clock generated by the OSC1. Magnetic Source Generates magnetic field for self test of magnetic sensor. FUSE ROM Fuse for adjustment

[AK8963] ShortDatasheet-E-01 - 5 - 2012/02 4.3. Pin Function QFN Pin No. WLCSP Pin No. Pin name I/O Power supply system Type Function

1 A1 DRDY O VID CMOS

Data Ready output pin. “H” active. Informs measurement ended and data is ready to be read.

2 A2 CSB I VID CMOS

Chip select pin for 4-wire SPI. “L” active. Connect to VID when selecting I2C bus interface. 3 A3 SCL I VID CMOS When the I2C bus interface is selected (CSB pin is connected to VID) SCL: Control data clock input pin Input: Schmidt trigger SK When the 4-wire SPI is selected SK: Serial clock input pin 5 A4 SDA I/O VID CMOS When the I2C bus interface is selected (CSB pin is connected to VID) SDA: Control data input/output pin Input: Schmidt trigger, Output: Open drain SI I When the 4-wire SPI is selected SI: Serial data input pin 15 B1 VDD - - Power Analog Power supply pin.

4 B3 RSV O VID CMOS

Reserved. Keep this pin electrically non-connected.

6 B4 SO O VID CMOS

When the I2C bus interface is selected (CSB pin is connected to VID) Hi-Z output. Keep this pin electrically non-connected. When the 4-wire SPI is selected Serial data output pin 13 C1 VSS - - Power Ground pin.

14 C2 TST1 I VDD CMOS

Test pin. Pulled down by 100kΩ internal resister. Keep this pin electrically non-connected or connect to VSS.

7 C3 TRG I VID CMOS

External trigger pulse input pin. Enabled only in External trigger mode. Pulled down by 100kΩ internal resister. When External trigger mode is not in use, keep this pin electrically non-connected or connect to VSS. 8 C4 VID - - Power Digital interface positive power supply pin.

12 D1 CAD0 I VDD CMOS

When the I2C bus interface is selected (CSB pin is connected to VID) CAD0: Slave address 0 input pin Connect to VSS or VDD. When the 4-wire serial interface is selected Connect to VSS.

11 D2 CAD1 I VDD CMOS

When the I2C bus interface is selected (CSB pin is connected to VID) CAD1: Slave address 1 input pin Connect to VSS or VDD. When the 4-wire serial interface is selected Connect to VSS. 10 D4 RSTN I VID CMOS Reset pin. Resets registers by setting to “L”. Connect to VID when not in use.

[AK8963] ShortDatasheet-E-01 - 6 - 2012/02 5. Overall Characteristics 5.1. Absolute Maximum Ratings Vss=0V Parameter Symbol Min. Max. Unit Power supply voltage (Vdd, Vid) V+ -0.3 +4.3 V Input voltage VIN -0.3 (V+)+0.3 V Input current IIN - ±10 mA Storage temperature TST -40 +125 °C (Note 1) If the device is used in conditions exceeding these values, the device may be destroyed. Normal operations are not guaranteed in such exceeding conditions. 5.2. Recommended Operating Conditions Vss=0V Parameter Remark Symbol Min. Typ. Max. Unit Operating temperature Ta -30 +85 °C Power supply voltage VDD pin voltage Vdd 2.4 3.0 3.6 V VID pin voltage Vid 1.65 Vdd V 5.3. Electrical Characteristics The following conditions apply unless otherwise noted: Vdd=2.4V to 3.6V , Vid=1.65V to Vdd, Temperature range=-30°C to 85°C 5.3.1. DC Characteristics Parameter Symbol Pin Condition Min. Typ. Max. Unit High level input voltage 1 VIH1 CSB RSTN TRG 70%Vid V Low level input voltage 1 VIL1 30%Vid V High level input voltage 2 VIH2 SK/SCL SI/SDA 70%Vid Vid+0.5 V Low level input voltage 2 VIL2 -0.5 30%Vid V High level input voltage 3 VIH3 CAD0 CAD1 70%Vdd V Low level input voltage 3 VIL3 30%Vdd V Input current 1 IIN1 SK/SCL SI/SDA CSB RSTN Vin=Vss or Vid -10 +10 mA Input current 2 IIN2 CAD0 CAD1 Vin=Vss or Vdd -10 +10 mA Input current 3 IIN3 TRG Vin=Vid 100 mA Input current 4 IIN4 TST1 Vin=Vdd 100 mA Hysteresis input voltage (Note 2) VHS SCL SDA Vid³2V 5%Vid V Vid<2V 10%Vid V High level output voltage 1 VOH1 SO DRDY IOH³-100µA 80%Vid V Low level output voltage 1 VOL1 IOL≤+100µA 20%Vid V Low level output voltage 2 (Note 3)(Note 4) VOL2 SDA IOL≤3mA Vid³2V 0.4 V IOL≤3mA Vid<2V 20%Vid V Current consumption (Note IDD1 VDD VID Power-down mode Vdd=Vid=3.0V 3 10 mA IDD2 When magnetic sensor is driven 5 10 mA IDD3 Self-test mode 9 15 mA IDD4 (Note 6) 0.1 5 mA (Note 2) Schmitt trigger input (reference value for design) (Note 3) Maximum load capacitance: 400pF (capacitive load of each bus line applied to the I 2C bus interface) (Note 4) Output is open-drain. Connect a pull-up resistor externally. (Note 5) Without any resistance load (Note 6) (case1)Vdd=ON, Vid=ON, RSTN pin = “L”. (case2)Vdd=ON, Vid=OFF(0V),RSTN pin = “L”.

[AK8963] ShortDatasheet-E-01 - 7 - 2012/02 (case3)Vdd=Off(0V), Vid=On. 5.3.2. AC Characteristics Parameter Symbol Pin Condition Min. Typ. Max. Unit Power supply rise time (Note 7) PSUP VDD VID Period of time that VDD (VID) changes from 0.2V to Vdd (Vid). (Note 8) 50 ms POR completion time (Note 7) PORT Period of time after PSUP to Power-down mode (Note 8) 100 µs Power supply turn off voltage SDV VDD VID Turn off voltage to enable POR to restart (Note 8) 0.2 V Power supply turn on interval (Note 7) PSINT VDD VID Period of time that voltage lower than SDV needed to be kept to enable POR to restart (Note 8) 100 µs Wait time before mode setting Twat 100 ms (Note 7) Reference value for design (Note 8) When POR circuit detects the rise of VDD /VID voltage, it resets internal circuits and initializes the registers. After reset, AK8963 transits to Power-down mode. Parameter Symbol Pin Condition Min. Typ. Max. Unit Trigger input effective pulse width tTRIGH TRG 200 ns Trigger input effective frequency (Note 9) tTRIGf TRG 100 Hz (Note 9) The value when the period of time from the end of the measurement to the next trigger input is 1.3ms. VIH tTRIGH PSINT:100µs PSUP:50ms PORT:100µs Power down mode Powe down mode SDV:0.2V VDD/(VID)

[AK8963] ShortDatasheet-E-01 - 8 - 2012/02 Parameter Symbol Pin Condition Min. Typ. Max. Unit Reset input effective pulse width (“L”) tRSTL RSTN 5 ms VIL tRSTL 5.3.3. Analog Circuit Characteristics Parameter Symbol Condition Min. Typ. Max. Unit Measurement data output bit DBIT BIT = “0” 14 bit BIT = “1” 16 Time for measurement TSM Single measurement mode 7.2 9 ms Magnetic sensor sensitivity BSE Tc=25°C (Note 10) 0.57 0.6 0.63 mT/LSB BIT = “0” BIT = “1” 0.1425 0.15 0.1575 Magnetic sensor measurement range (Note 11) BRG Tc=25°C (Note 10) ±4912 mT Magnetic sensor initial offset (Note 12) Tc=25°C BIT = “0” -500 500 LSB (Note 10) Value after sensitivity is adjusted using sensitivity fine adjustment data stored in Fuse ROM. (Note 11) Reference value for design (Note 12) Value of measurement data register on shipment without applying magnetic field on purpose.

[AK8963] ShortDatasheet-E-01 - 9 - 2012/02 5.3.4. 4-wire SPI 4-wire SPI is compliant with mode 3 Parameter Symbol Condition Min. Typ. Max. Unit CSB setup time Tcs 50 ns Data setup time Ts 50 ns Data hold time Th 50 ns SK high time Twh Vid³2.5V 100 ns 2.5V>Vid³1.65V 150 ns SK low time Twl Vid³2.5V 100 ns 2.5V>Vid³1.65V 150 ns SK setup time Tsd 50 ns SK to SO delay time (Note 13) Tdd 50 ns CSB to SO delay time (Note 13) Tcd 50 ns SK rise time (Note 14) Tr 100 ns SK fall time (Note 14) Tf 100 ns CSB high time Tch 150 ns (Note 13) SO load capacitance: 20pF (Note 14) Reference value for design. [4-wire SPI] CSB SK SI Tcs SO Ts Tsd Tcd Th Tdd Hi-Z Hi-Z Twh Twl Tch [Rise time and fall time] SK Tr Tf 0.9Vid 0.1Vid

[AK8963] ShortDatasheet-E-01 - 10 - 2012/02 5.3.5. I2C Bus Interface CSB pin = “H” I2C bus interface is compliant with Standard mode and Fast mode. Standard/Fast mode is selected automatically by fSCL. (1) Standard mode fSCL£100kHz Symbol Parameter Min. Typ. Max. Unit fSCL SCL clock frequency 100 kHz tHIGH SCL clock "High" time 4.0 ms tLOW SCL clock "Low" time 4.7 ms tR SDA and SCL rise time 1.0 ms tF SDA and SCL fall time 0.3 ms tHD:STA Start Condition hold time 4.0 ms tSU:STA Start Condition setup time 4.7 ms tHD:DAT SDA hold time (vs. SCL falling edge) 0 ms tSU:DAT SDA setup time (vs. SCL rising edge) 250 ns tSU:STO Stop Condition setup time 4.0 ms tBUF Bus free time 4.7 ms (2) Fast mode 100kHz<fSCL£400kHz Symbol Parameter Min. Typ. Max. Unit fSCL SCL clock frequency 400 kHz tHIGH SCL clock "High" time 0.6 ms tLOW SCL clock "Low" time 1.3 ms tR SDA and SCL rise time 0.3 ms tF SDA and SCL fall time 0.3 ms tHD:STA Start Condition hold time 0.6 ms tSU:STA Start Condition setup time 0.6 ms tHD:DAT SDA hold time (vs. SCL falling edge) 0 ms tSU:DAT SDA setup time (vs. SCL rising edge) 100 ns tSU:STO Stop Condition setup time 0.6 ms tBUF Bus free time 1.3 ms tSP Noise suppression pulse width 50 ns [I2C bus interface timing] 1/fSCL SCL VIH2 VIL2 tHIGH SCL SDA VIH2 tLOW tBUF tHD:STA tR tF tHD:DAT tSU:DAT tSU:STA Stop Start Start Stop tSU:STO VIL2 VIH2 VIL2 tSP

[AK8963] ShortDatasheet-E-01 - 11 - 2012/02 6. Functional Explanation 6.1. Power States When VDD and VID are turned on from V dd=OFF (0V) and Vid=OFF (0V), all registers in AK8963 are initialized by POR circuit and AK8963 transits to Power-down mode. All the states in the table below can be set, although the transition from state 2 to state 3 and the transition from state 3 to state 2 are prohibited. Table 6.1 State VDD VID Power state 1 OFF (0V) OFF (0V) OFF (0V). It doesn’t affect external interface. Digital input pins other than SCL and SDA pin should be fixed to “L”(0V). 2 OFF (0V) 1.65V to 3.6V OFF (0V). It doesn’t affect external interface. 3 2.4V to 3.6V OFF (0V) OFF (0V). It doesn’t affect external interface. Digital input pins other than SCL and SDA pin should be fixed to “L” (0V). 4 2.4V to 3.6V 1.65V to Vdd ON 6.2. Reset Functions When the power state is ON, always keep Vid≤Vdd. Power-on reset (POR) works until Vdd reaches to the operation effective voltage (about 1.4V: reference value for design) on power-on sequence. After POR is deactivated, all registers are initialized and transits to power down mode. When Vdd=2.4 ~ 3.6V, POR circuit and VID monitor circuit are active. When Vid=0V, AK8963 is in reset status and it consumes the current of reset state (IDD4). AK8963 has four types of reset; (1) Power on reset (POR) When Vdd rise is detected, POR circuit operates, and AK8963 is reset. (2) VID monitor When Vid is turned OFF (0V), AK8963 is reset. (3) Reset pin (RSTN) AK8963 is reset by Reset pin. When Reset pin is not used, connect to VID. (4) Soft reset AK8963 is reset by setting SRST bit. When AK8963 is reset, all registers are initialized and AK8963 transits to Power-down mode.

[AK8963] ShortDatasheet-E-01 - 12 - 2012/02 6.3. Operation Modes AK8963 has following seven operation modes: (1) Power-down mode (2) Single measurement mode (3) Continuous measurement mode 1 (4) Continuous measurement mode 2 (5) External trigger measurement mode (6) Self-test mode (7) Fuse ROM access mode By setting CNTL1 register MODE[3:0] bits, the operation set for each mode is started. A transition from one mode to another is shown below. MODE[3:0]=“0001” MODE[3:0]=“0000” Transits automatically MODE[3:0]=“0010” MODE[3:0]=“0000” MODE[3:0]=“0110” MODE[3:0]=“0000” MODE[3:0]=“0100” MODE[3:0]=“0000” MODE[3:0]=“1000 MODE[3:0]=“0000” Transits automatically MODE[3:0]=“1111 MODE[3:0]=“0000” Power-down mode Continuous measurement mode 2 Sensor is measured periodically in 100Hz. Transits to Power-down mode by writing MODE[3:0]=“0000”. Self-test mode Sensor is self-tested and the result is output. Transits to Power-down mode automatically. Single measurement mode Sensor is measured for one time and data is output. Transits to Power-down mode automatically after measurement ended. External trigger measurement mode Sensor is measured for one time by external trigger. Waits for next trigger after data is output. Transits to Power-down mode by writing MODE[3:0]=“0000”. Fuse ROM access mode Turn on the circuit needed to read out Fuse ROM. Transits to Power-down mode by writing MODE[3:0]=“0000”. Continuous measurement mode 1 Sensor is measured periodically in 8Hz. Transits to Power-down mode by writing MODE[3:0]=“0000”. Figure 6.1 Operation modes When power is turned ON, AK8963 is in power-down mode. When a specified value is set to MODE[3:0], AK8963 transits to the specified mode and starts operation. When user wants to change operation mode, transit to power-down mode first and then transit to other modes. After power-down mode is set, at least 100ms(Twat) is needed before setting another mode.

[AK8963] ShortDatasheet-E-01 - 13 - 2012/02 7. Example of Recommended External Connection 7.1. I2C Bus Interface <AK8963C> Pins of dot circle should be kept non-connected. <AK8963N> Same as AK8963C. AK8963C (Top view) Interrupt Host CPU I2C i/f Power for i/f VID POWER 1.65V~Vdd VDD POWER 2.4V~3.6V 0.1µF 0.1µF TST2 RSTN VID SO SDA /SI TRG RSV SCL /SK CSB TST1 CAD0 CAD1 VSS VDD DRDY Slave address select CAD1 CAD0 address VSS VSS 0 0 0 1 1 0 0 R/W VSS VDD 0 0 0 1 1 0 1 R/W VDD VSS 0 0 0 1 1 1 0 R/W VDD VDD 0 0 0 1 1 1 1 R/W GPIB 4 3 2 1 D C B A

[AK8963] ShortDatasheet-E-01 - 14 - 2012/02 7.2. 4-wire SPI <AK8963C> Pins of dot circle should be kept non-connected. <AK8963N> Same as AK8963C. AK8963C (Top view) Interrupt Host CPU SPI i/f Power for i/f VID POWER 1.65V~Vdd VDD POWER 2.4V~3.6V 0.1µF 0.1µF TST2 RSTN VID SO SDA /SI TRG RSV SCL /SK CSB TST1 CAD0 CAD1 VSS VDD DRDY GPIB 4 3 2 1 D C B A

[AK8963] ShortDatasheet-E-01 - 15 - 2012/02 8. Package 8.1. Marking <AK8963C>

  • Product name: 8963
  • Date code: X1X2X3X4X5 X1 = ID X2 = Year code X3X4 = Week code X5 = Lot <Top view> <AK8963N>
  • Company logo: AKM
  • Product name: 8963
  • Date code: X1X2X3X4X5 X1 = ID X2 = Year code X3X4 = Week code X5 = Lot <Top view> 8.2. Pin Assignment <AK8963C> 4 3 2 1 D RSTN CAD1 CAD0 C VID TRG TST1 VSS B SO RSV VDD A SDA/SI SCL/SK CSB DRDY <Top view> <AK8963N> SO AK8963N <Top view> TRG VID RSV SCL/SK NC RSTN CAD0 CAD1 CSB TST1 DRDY VSS SDA/SI VDD NC AKM 8963 X1X2X3X4X5 8963 X1X2X3X4X5

[AK8963] ShortDatasheet-E-01 - 16 - 2012/02 8.3. Outline Dimensions <AK8963C> [mm] <AK8963N> [mm] 0.05 C 0.57 max. C 0.40 0.13 0.4 1.2 1.2 0.4 0.24±0.03 4 3 2 1 1.59±0.03 D 1.59±0.03 C B A 1 2 3 4 3.00±0.05 1 4 12 9 3.00±0.05 A B 0.75±0.05 0.05 C 1.8±0.10 4 1 1.8±0.10 0.25 REF. 0.35±0.10 9 12 C0.25

0.10 M C A B

0.45 REF.

[AK8963] ShortDatasheet-E-01 - 17 - 2012/02 8.4. Recommended Foot Print Pattern <AK8963C> [mm] <AK8963N> [mm] 2.25 0.575 0.30 0.50

[AK8963] ShortDatasheet-E-01 - 18 - 2012/02 9. Relationship between the Magnetic Field and Output Code The measurement data increases as the magnetic flux density increases in the arrow directions. <AK8963C> <AK8963N> Important Notice

  • These products and their specifications are subject to change without notice. When you consider any use or application of these produc ts, please make inquiries the sales office of Asahi Kasei Microdevices Corporation (AKM) or authorized distributors as to current status of the products.
  • AKM assumes no liability for infringement of any patent, intellectual property, or other rights in the application or use of any 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.
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