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PDF AK09912 Data sheet ( Hoja de datos )
| Número de pieza | AK09912 | |
| Descripción | 3-axis Electronic Compass | |
| Fabricantes | AKM | |
| Logotipo |  |
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[AK09912]
AK09912
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
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, External trigger measurement, Self-test and
Fuse ROM access
DRDY (Data Ready) 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)
Built-in temperature sensor
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: 1 mA (typ.)
Package:
AK09912C 14-pin WL-CSP (BGA):
1.6 mm 1.6 mm 0.5 mm (typ.)
MS1547-E-02
-1-
2014/7
1 page  
4.1. Block Diagram
4. Circuit Configuration
[AK09912]
3-axis
Hall
sensor
MUX
Chopper
SW
Pre-
AMP
Integrator＆ADC
Signal
Processing
Magnetic Source
HE-Drive
T-Sensor
VREF
OSC1
Timing
Control
OSC2
Interface,
Logic
& Register
RSTN
SCL/SK
SDA/SI
CSB
SO
DRDY
POR
FUSE ROM
CAD0 CAD1 TST1 TST2 TRG
VSS VDD VID
4.2. Block Function
Block
3-axis Hall sensor
MUX
Chopper SW
HE-Drive
Pre-AMP
T-Sensor
Integrator & ADC
OSC1
OSC2
POR
VREF
Interface Logic
&
Register
Signal Processing
Timing Control
Magnetic Source
FUSE ROM
Function
Monolithic Hall elements.
Multiplexer for selecting Hall elements.
Performs chopping.
Magnetic sensor drive circuit for constant-current driving of sensor.
Fixed-gain differential amplifier used to amplify the magnetic sensor signal.
Temperature sensor. Generate a voltage in proportion to temperature.
Integrates and amplifies pre-AMP output or T-sensor output and performs
analog-to-digital conversion.
Generates an operating clock for sensor measurement.
Generates an operating periodic clock for sequencer.
Power On Reset circuit. Generates reset signal on rising edge of VDD.
Generates reference voltage and current.
Exchanges data with an external CPU.
DRDY pin indicates sensor measurement has ended and data is ready to be read.
I2C bus interface using two pins, namely, SCL and SDA. Standard, Fast and
High-speed modes 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 1.65 V, too.
Noise suppression function by the filtering process.
Filtering process can be enabled or disabled.
Generates a timing signal required for internal operation from a clock generated by
the OSC1.
Generates magnetic field for self test of magnetic sensor.
Fuse ROM for adjustment.
MS1547-E-02
-5-
2014/7
5 Page 
[AK09912]
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.
Standard mode
fSCL≤100kHz
Symbol
fSCL
tHIGH
tLOW
tR
tF
Parameter
SCL clock frequency
SCL clock “High” time
SCL clock “Low” time
SDA and SCL rise time
SDA and SCL fall time
Min.
4.0
4.7
Typ.
Max.
100
1.0
0.3
Unit
kHz
µs
µs
µs
µs
tHD:STA
Start Condition hold time
4.0
µs
tSU:STA
Start Condition setup time
4.7
µs
tHD:DAT SDA hold time (vs. SCL falling edge)
0
µs
tSU:DAT SDA setup time (vs. SCL rising edge)
250
ns
tSU:STO
tBUF
Stop Condition setup time
Bus free time
4.0
4.7
µs
µs
Fast mode
100Hz≤fSCL≤400kHz
Symbol
Parameter
fSCL
tHIGH
tLOW
SCL clock frequency
SCL clock “High” time
SCL clock “Low” time
tR SDA and SCL rise time
tF SDA and SCL fall time
tHD:STA
Start Condition hold time
tSU:STA
Start Condition setup time
tHD:DAT
SDA hold time (vs. SCL falling edge)
tSU:DAT
SDA setup time (vs. SCL rising edge)
tSU:STO
Stop Condition setup time
tBUF
Bus free time
tSP Noise suppression pulse width
[I2C bus interface timing]
1/fSCL
Min.
0.6
1.3
0.6
0.6
0
100
0.6
1.3
Typ.
Max.
400
0.3
0.3
50
Unit
kHz
µs
µs
µs
µs
µs
µs
µs
ns
µs
µs
ns
VIH2
SCL
VIL2
SDA
tBUF
tLOW tR
tHIGH tF
SCL
tHD:STA
Stop Start
tHD:DAT
tSU:DAT tSU:STA
Start
VIH2
VIL2
tSP
VIH2
VIL2
tSU:STO
Stop
MS1547-E-02
- 11 -
2014/7
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet AK09912.PDF ] | |
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