Zakładka z wyszukiwarką danych komponentów
Selected language     Polish  ▼
Nazwa części
         Szczegóły


ADXRS150 Datasheet(Arkusz danych) 8 Page - Analog Devices

Numer części ADXRS150
Szczegółowy opis  ±150°/s Single Chip Yaw Rate Gyro with Signal Conditioning
Pobierz  12 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
Logo 

 
 8 page
background image
ADXRS150
THEORY OF OPERATION
The ADXRS150 operates on the principle of a resonator gyro.
Two polysilicon sensing structures each contain a dither frame,
which is electrostatically driven to resonance. This produces the
necessary velocity element to produce a Coriolis force during
angular rate. At two of the outer extremes of each frame,
orthogonal to the dither motion, are movable fingers that are
placed between fixed pickoff fingers to form a capacitive pickoff
structure that senses Coriolis motion. The resulting signal is fed
to a series of gain and demodulation stages that produce the
electrical rate signal output. The dual-sensor design rejects
external g-forces and vibration. Fabricating the sensor with the
signal conditioning electronics preserves signal integrity in
noisy environments.
The electrostatic resonator requires 14 V to 16 V for operation.
Since only 5 V is typically available in most applications, a
charge pump is included on-chip. If an external 14 V to 16 V
supply is available, the two capacitors on CP1–CP4 can be omit-
ted and this supply can be connected to CP5 (Pin 7D) with a
100 nF decoupling capacitor in place of the 47 nF.
After the demodulation stage there is a single-pole low-pass
filter consisting of an internal 9 kΩ resistor (RSEN1) and an
external user-supplied capacitor (CMID). A CMID capacitor of
100 nF sets a 400 Hz ±35% low-pass pole and is used to limit
high frequency artifacts before final amplification. Bandwidth
limit capacitor, COUT, sets the pass bandwidth (see Figure 22 and
the Setting Bandwidth section).
AGND
TEMP
ST2
ST1
CP1
CP2
RATEOUT
CP4
PDD
CMID
SUMJ
2.5V
6A
5A
4A
3A
2A
1B
1C
1D
1E
1F
7B
7C
7D
7E
7F
6G
5G
4G
3G
2G
CP5
CP3
100nF
COUT = 22nF
22nF
AVCC
100nF
100nF
PGND
22nF
47nF
5V
NOTE THAT INNER ROWS/COLUMNS OF PINS HAVE BEEN OMITTED
FOR CLARITY BUT SHOULD BE CONNECTED IN THE APPLICATION.
Figure 21. Example Application Circuit (Top View)
Supply and Common Considerations
Only power supplies used for supplying analog circuits are rec-
ommended for powering the ADXRS150. High frequency noise
and transients associated with digital circuit supplies may have
adverse effects on device operation.
Figure 21 shows the recommended connections for the
ADXRS150 where both AVCC and PDD have a separate
decoupling capacitor. These should be placed as close to their
respective pins as possible before routing to the system analog
supply. This will minimize the noise injected by the charge
pump that uses the PDD supply.
It is also recommended to place the charge pump capacitors
connected to the CP1–CP4 pins as close to the part as possible.
These capacitors are used to produce the on-chip high voltage
supply switched at the dither frequency at approximately
14 kHz. Care should be taken to ensure that there is no more
than 50 pF of stray capacitance between CP1–CP4 and ground.
Surface-mount chip capacitors are suitable as long as they are
rated for over 15 V.
5V
+
-
SELF
TEST
AVCC
ST1
ST2
3A
5G
4G
ADXRS150
CP2
CP1
PDD
4A 5A
7E 6G
CHARGE
PUMP/REG.
12V
PTAT
7F
6A 7B 7C
7D
47nF
CP4 CP3 CP5
RATE
SENSOR
2G 1F
1D
CORIOLIS
SIGNAL CHANNEL
AGND
CMID
1C
SUMJ
RATE-
OUT
2.5V
1B
2A
1E
3G TEMP
ROUT
180k
Ω 1%
RESONATOR LOOP
DEMOD
π
2.5V REF
≈9kΩ±35%
100nF
22nF
PGND
100nF
100nF
COUT
RSEN1 RSEN2
22nF
Figure 22. Block Diagram with External Components
Setting Bandwidth
External capacitors CMID and COUT are used in combination
with on-chip resistors to create two low-pass filters to limit the
bandwidth of the ADXRS150’s rate response. The –3 dB
frequency set by ROUT and COUT is:
(
)
OUT
OUT
OUT
C
R
π
/
f
×
×
×
=
2
1
and can be well controlled since ROUT has been trimmed during
manufacturing to be 180 kΩ ±1%. Any external resistor applied
between the RATEOUT (1B, 2A) and SUMJ (1C, 2C) pins will
result in:
(
)(
)
EXT
EXT
OUT
R
kΩ
/
R
kΩ
R
+
×
=
180
180
The –3 dB frequency is set by RSEN (the parallel combination
Rev. A | Page 8 of 12




Html Pages

1  2  3  4  5  6  7  8  9  10  11  12 


Datasheet Download



Powiązane numery części

Numer częściSzczegółowy opis komponentówHtml ViewProducent
ADXRS300±300°/s Single Chip Yaw Rate Gyro with Signal Conditioning 1 2 3 4 5 MoreAnalog Devices
ADXRS401+-75/s Single Chip Yaw Rate Gyro with Signal Conditioning 1 2 3 4 5 MoreAnalog Devices
ADXL05+-1 g to +-5 g Single Chip Accelerometer with Signal Conditioning 1 2 3 4 5 MoreAnalog Devices
ADIS16100+-300°/sec Yaw Rate Gyro with SPI Interface 1 2 3 4 5 MoreAnalog Devices
ADIS16080±80°/sec Yaw Rate Gyro with SPI Interface 1 2 3 4 5 MoreAnalog Devices
ADXRS150EB150/s Single Chip Rate Gyro Evaluation Board 1 Analog Devices
AN5295NK3-ch. sound signal processing single chip IC for TV with I2C bus 1 2 3 4 5 MorePanasonic Semiconductor
TC9284BFCD SINGLE CHIP PROCESSOR WITH BUILT-IN 1BIT DA CONVERTER 1 2 3 4 5 MoreToshiba Semiconductor
LC865520B8-Bit Single Chip Microcontroller with On-Chip 20/16/12/08/04K-Byte ROM and 512-Byte RAM 1 2 3 4 5 MoreSanyo Semicon Device
LC86E56328-Bit Single Chip Microcontroller with the One-Time Programmable UVEPROM 1 2 3 4 5 MoreSanyo Semicon Device

Link URL

Czy Alldatasheet okazała się pomocna?  [ DONATE ]  

O Alldatasheet   |   Reklama   |   Kontakt   |   Polityka prywatności   |   Dodaj do ulubionych   |   Linki   |   Lista producentów
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl