3-AXIS ACCELEROMETER ANALOG I/F

BMA145

Manufacturer Part NumberBMA145
Description3-AXIS ACCELEROMETER ANALOG I/F
ManufacturerBosch Sensortec
BMA145 datasheets
 

Specifications of BMA145

AxisX, Y, ZAcceleration Range±4g
Sensitivity300mV/gVoltage - Supply1.8 V ~ 3.5 V
Output TypeAnalogBandwidth1.5kHz
InterfaceParallelMounting TypeSurface Mount
Package / Case16-LGAFor Use With828-1011 - BMA145 DAUGHTERCARD FOR DEV KIT
Lead Free Status / RoHS StatusLead free / RoHS CompliantOther names828-1002-2
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BMA145
Analog, triaxal acceleration sensor
Bosch Sensortec
General description
The BMA145 is an analog, triaxial low-g acceleration
sensor for consumer market applications, available in
a super-flat land-grid array (LGA) package with a very
small footprint of 4mm x 4mm and a height of merely
0.9mm. It allows measurements of static as well as
dynamic accelerations. Due to its three perpendicular
axes it gives the absolute orientation in a gravity field
and enables free-fall detection.
The BMA145 is a two-chip arrangement, which com-
bines an application-specific integrated circuit (ASIC)
with a three-channel silicon accelerometer, to form a
true micro electro mechanical system (MEMS).
Key features BMA145
Triaxial, analog low-g sensor with three
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parallel outputs
±4g range
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Ultra-low power consumption
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Power-saving stand-by mode
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Fast wake-up time
Very wide power supply range
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Additional multiplexed serial analog output
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Internal filtering capability
On-chip gain and offset compensation
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Self-test capability
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Super-flat, small footprint LGA package
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RoHS compliant
This concept and the advanced micromachining tech-
nology have proven their robustness and reliability in
more than 150 million Bosch MEMS sensors per year.
The modular ASIC design provides the flexibility to
react quickly to customer needs for additional sensor
functionality in the future.
The BMA145 provides three parallel analog output
signals in a ±4g acceleration range. In addition to the
parallel X, Y and Z output signals there is the option to
multiplex any axis to a single supplementary output
pin in a freely customized manner.
Leveraging its ultra-low power consumption and its
wake-up feature the BMA145 senses tilt, motion,
shock and vibration in advanced gaming console
applications and all kind of mobile, personal commu-
nication and entertainment devices.
BMA145 applications based on low-g sensing
Gaming
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Virtual reality
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Sports- and life-style wear
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Handhelds
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Healthcare
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Cell phones
Navigation
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Electronic compass compensation
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Technical data
BMA145
Sensitive axes
Measurement range
Package
LGA, 4 mm x 4 mm x
Sensitivity
(factory trimmed)
Non-linearity
±0.5 % FS (typ.)
Cross axis sensitivity
Zero-g offset
±150 mg (max.)
(factory trimmed)
Zero-g offset tempera-
ture drift
RMS-noise
Bandwidth
(1
order LP filtering)
st
Supply voltage
Current consumption
(typ., normal mode)
Idle current
(max.,stand-by mode)
Wake-up time
Temperature range
-40 °C … +85 °C
x/y/z
±4g
0.9 mm
V
/10 [V/g]
DD
0.2 % (typ.)
±1 mg/K (typ.)
220 μg/√Hz
1.5 kHz
1.8 … 3.5 V
200 μA
0.9 μA
1 msec (typ.)

BMA145 Summary of contents

  • Page 1

    ... BMA145 Analog, triaxal acceleration sensor Bosch Sensortec General description The BMA145 is an analog, triaxial low-g acceleration sensor for consumer market applications, available in a super-flat land-grid array (LGA) package with a very small footprint of 4mm x 4mm and a height of merely 0.9mm. It allows measurements of static as well as dynamic accelerations ...

  • Page 2

    ... The return from stand-by mode to normal mode takes less than 1 millisecond wake up time. The BMA145 is ready to use due to test and calibra- tion at factory level. All calibration parameters, e.g. for offset and sensitivity, are stored in an internal EEPROM ...