 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
ADIS16133BMLZ Datasheet(PDF) 11 Page - Analog Devices |
|
||||||||||||||||||||||||||||||
ADIS16133BMLZ Datasheet(HTML) 11 Page - Analog Devices |
|
|
11 / 20 page  ADIS16133 Rev. 0 | Page 11 of 20 DIGITAL PROCESSING CONFIGURATION Figure 18 provides a block diagram for the sampling and digital filter stages inside the ADIS16133. Table 15 provides a summary of digital processing registers for sample rate and filter control. Table 15. Digital Processing Registers Register Name Address Description SMPL_PRD 0x1E Sample rate control AVG_CNT 0x20 Digital filtering and range control DEC_RATE 0x22 Decimation rate setting Internal Sample Rate The SMPL_PRD register in Table 16 provides a programmable control for the internal sample rate. Use the following formula to calculate the decimal number for the code to write into this register: SPS 2048 ;1 768 , 32 _ ≤ − = S S f f PRD SMPL The factory default setting for SMPL_PRD sets the internal sample rate to a rate of 1024 SPS; the minimum setting for the SMPL_PRD register is 0x000F, which results in an internal sample rate of 2048 SPS. Table 16. SMPL_PRD Bit Descriptions Bits Description (Default = 0x001F) [15:0] Clock setting bits; sets f S in Figure 18 Input Clock Configuration Set SMPL_PRD = 0x0000 (DIN = 0x9F00, then DIN = 0x9E00) to disable the internal clock and enable CLKIN as a clock input pin. Digital Filtering The AVG_CNT register (see Table 17) provides user controls for the low-pass filter. This filter contains two cascaded averaging filters that provide a Bartlett window FIR filter response (see Figure 17). For example, set AVG_CNT[7:0] = 0x04 (DIN = 0xA004) to set each stage to 16 taps. When used with the default sample rate of 1024 SPS, this establishes a −3 dB bandwidth of approximately 20 Hz for this filter. 0 –20 –40 –60 –80 –100 –120 –140 0.001 0.01 0.1 1 FREQUENCY ( f/fS) N = 2 N = 4 N = 16 N = 64 Figure 17. Bartlett Window FIR Filter Frequency Response (Phase Delay = N Samples) Table 17. AVG_CNT Bit Descriptions Bits Description (Default = 0x0000) [15:3] Don’t care [2:0] Binary; B variable in Figure 18; maximum setting = 110 (binary) = 6 (decimal) Averaging/Decimation Filter The DEC_RATE register (see Table 18) provides user control for the final filter stage (see Figure 18), which averages and decimates the output data. For systems that value lower sample rates, this filter stage provides an opportunity to lower the sample rate while maintaining optimal bias stability performance. The −3 dB bandwidth of this filter stage is approximately one half the output data rate. For example, set DEC_RATE[7:0] = 0x04 (DIN = 0xA204) to reduce the sample rate by a factor of 16. When the factory default 1024 SPS sample rate is used, this decimation setting reduces the output data rate to 64 SPS and the sensor bandwidth to approximately 31 Hz. Table 18. DEC_RATE Bit Descriptions Bits Description (Default = 0x0000) [15:5] Don’t care [4:0] Binary; D variable in Figure 18; maximum setting = 1000 (binary) = 16 (decimal) MEMS GYRO 402Hz 819Hz CLOCK fS CLKIN ÷ND –3dB BANDWIDTH = 335Hz B = AVG_CNT[2:0] NB = 2B NB = NUMBER OF TAPS PER STAGE SP ≥ 15 SP = SMPL_PRD D = DEC_RATE[4:0] ND = 2D ND = NUMBER OF TAPS ND = DATA RATE DIVISOR fS = 32,768 SP + 1 Figure 18. Sampling and Frequency Response Block Diagram |
Similar Part No. - ADIS16133BMLZ |
|
Similar Description - ADIS16133BMLZ |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.NET |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
