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PDF AK09915 Data sheet ( Hoja de datos )
| Número de pieza | AK09915 | |
| Descripción | 3-axis Electronic Compass | |
| Fabricantes | AKM | |
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[AK09915]
AK09915
3-axis Electronic Compass
1. General Description
AK09915 is 3-axis electronic compass IC with high sensitive Hall sensor technology.
Small package of AK09915 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 smart phone and tablet to realize pedestrian
navigation function.
2. Features
Functions:
3-axis magnetometer device suitable for compass application
Built-in A to D Converter for magnetometer data out
16-bit data out for each 3-axis magnetic component
Sensitivity: 0.15 µT/LSB (typ.)
Serial interface
I2C bus interface
Standard, Fast and High-speed modes (up to 2.5 MHz) compliant with Philips I2C
specification Ver.2.1
4-wire SPI
Operation mode
Power-down, Single measurement, Continuous measurement and Self-test
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 internal magnetic source
Built-in Noise Suppression Filter (NSF)
Selectable sensor drive
Low power drive / Low noise drive
Built-in magnetic sensitivity adjustment circuit
32 FIFO data buffer
Operating temperatures:
-30˚C to +85˚C
Operating supply voltage:
Analog power supply +1.7V to +3.6V
Digital Interface supply +1.65V to analog power supply voltage
Current consumption:
Power-down:
3 µA (typ.)
Measurement:
Average current consumption at 100 Hz repetition rate
Low power drive: 0.9 mA (typ.)
Low noise drive: 1.8 mA (typ.)
Package:
AK09915C 14-pin WL-CSP (BGA): 1.6 mm 1.6 mm 0.5 mm (typ.)
015006484-E-02
-1-
2016/7
1 page  
[AK09915]
5. Pin Configurations and Functions
Pin Pin I/O Power Type
No. name
supply
Function
A1 DRDY O
VID CMOS Data Ready output pin.
“H” active. Informs measurement ended and data is ready to be read.
A2 CSB I VID CMOS Chip select pin for 4-wire SPI.
“L” active. Connect to VID when selecting I2C bus interface.
A3 SCL I VID CMOS When the I2C bus interface is selected (CSB pin is connected to VID).
SCL: Control clock input pin
Input: Schmitt trigger
SK When the 4-wire SPI is selected.
SK: Serial clock input pin.
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: Schmitt trigger, Output: Open-drain
SI I
When the 4-wire SPI is selected.
SI: Serial data input pin
B1 VDD -
- Power Positive power supply pin.
B3 N/C -
-
- Non-connect
Connect to VSS or keep this pin non-connected.
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
C1 VSS -
- Power Ground pin
C2 N/C -
-
- Non-connect
Connect to VSS or keep this pin non-connected.
C3 N/C -
-
- Non-connect
Connect to VSS or keep this pin non-connected.
C4 VID
D1 CAD0
-
I
-
VDD
Power
CMOS
Digital interface positive power supply pin.
When the I2C bus interface is selected (CSB pin is connected to VID)
CAD0:Slave address 0 input pin
Connect to VSS or VDD.
D2 CAD1 I
VDD
CMOS
When the 4-wire serial interface is selected.
Connect to VSS.
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.
D4 RSTN I
VID CMOS Reset pin.
Resets registers by setting to “L”. Connect to VID when not in use.
015006484-E-02
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2016/7
5 Page 
[AK09915]
High-speed mode (Hs-mode)
Cb≤100pF (Cb: load capacitance)
fSCLH≤2.5MHz
Symbol
Parameter
fSCLH
tHIGH
tLOW
SCLH clock frequency
SCLH clock “High” time
SCLH clock “Low” time
tR_CL
SCLH rise time
tR_CL1
SCLH rise time after a repeated START
condition and after an acknowledge bit
tR_DA
SDAH rise time
tF_CL
SCLH fall time
tF_DA
SDAH fall time
tHD:STA
Start Condition hold time
tSU:STA
Start Condition setup time
tHD:DAT SDAH hold time (vs. SCLH falling edge)
tSU:DAT SDAH setup time (vs. SCLH rising edge)
tSU:STO
Stop Condition setup time
tSP Noise suppression pulse width
Cb≤400pF
fSCLH≤1.7MHz
Symbol
Parameter
fSCLH
tHIGH
tLOW
SCLH clock frequency
SCLH clock “High” time
SCLH clock “Low” time
tR_CL
SCLH rise time
tR_CL1
SCLH rise time after a repeated START
condition and after an acknowledge bit
tR_DA
SDAH rise time
tF_CL
SCLH fall time
tF_DA
SDAH fall time
tHD:STA
Start Condition hold time
tSU:STA
Start Condition setup time
tHD:DAT SDAH hold time (vs. SCLH falling edge)
tSU:DAT SDAH setup time (vs. SCLH rising edge)
tSU:STO
Stop Condition setup time
tSP Noise suppression pulse width
Min.
110
220
10
10
10
-
-
160
160
0
10
160
Min.
120
320
20
20
20
-
-
160
160
0
10
160
Typ.
Typ.
Max.
2.5
40
80
80
40
80
10
Max.
1.7
80
160
160
80
160
10
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
015006484-E-02
- 11 -
2016/7
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK09915.PDF ] | |
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