Specifications

DATA SHEET QF4A512
Rev D4, Dec 07 66 www.quickfiltertech.com
List of Figures
FIGURE 1. FUNCTIONAL BLOCK DIAGRAM.................................................................................................................................. 11
FIGURE 2. MEMORY MAP ......................................................................................................................................................... 12
FIGURE 3. POWER UP / RESET SEQUENCE ................................................................................................................................ 14
FIGURE 4. EXTENDED INITIALIZATION ........................................................................................................................................ 15
FIGURE 5. QF4A412 INPUT SCHEMATIC ................................................................................................................................... 18
FIGURE 6. MAXIMUM TAPS VS SAMPLE RATE ........................................................................................................................... 23
FIGURE 7. SYSTEM CLOCKS BLOCK DIAGRAM .......................................................................................................................... 24
FIGURE 8. CONFIGURE MODE FORMAT ..................................................................................................................................... 25
FIGURE 9. CONFIGURE MODE TIMING, READ AND WRITE ........................................................................................................... 26
FIGURE 10. CONFIGURE MODE TIMING – MULTIPLE READ/WRITE .............................................................................................. 26
FIGURE 11. RUN MODE FORMAT .............................................................................................................................................. 27
FIGURE 12. RUN MODE TIMING, READ AND WRITE .................................................................................................................... 29
FIGURE 13. COMPARISON OF CONFIGURE AND RUN MODE TIMING............................................................................................. 30
FIGURE 14. APPLICATION CIRCUIT – SINGLE-ENDED, AC COUPLED ............................................................................................. 61
FIGURE 15. APPLICATION CIRCUIT – SINGLE-ENDED, DC COUPLED ............................................................................................. 62
FIGURE 16. APPLICATION CIRCUIT – DIFFERENTIAL, AC COUPLED .............................................................................................. 63
FIGURE 17. APPLICATION CIRCUIT – DIFFERENTIAL, DC COUPLED .............................................................................................. 64
List of Tables
TABLE 1. EXAMPLE SAMPLING RATES AND ENOB ...................................................................................................................... 19
TABLE 2. MAXIMUM ANALOG INPUT FREQUENCY @40MHZ SPI BUS CLOCK ............................................................................... 20
TABLE 3. CHANNEL 1 - FIR FILTER ADDRESS INFORMATION ....................................................................................................... 22
TABLE 4. CHANNEL 2 - FIR FILTER ADDRESS INFORMATION ....................................................................................................... 22
TABLE 5. CHANNEL 3 - FIR FILTER ADDRESS INFORMATION ....................................................................................................... 22
TABLE 6. CHANNEL 4 - FIR FILTER ADDRESS INFORMATION ....................................................................................................... 22
TABLE 7. CONFIGURE MODE, REGISTER ADDRESS DECODING ................................................................................................... 25
TABLE 8. CONFIGURE MODE, REGISTER DATA .......................................................................................................................... 25
TABLE 9. RUN MODE, CONTROL ADDRESS FOR COMMAND WRITES, .......................................................................................... 27
TABLE 10. RUN MODE, CONTROL REGISTER DATA FORMAT ...................................................................................................... 27
TABLE 11. RUN MODE, OUTPUT DATA STRUCTURE ................................................................................................................... 27
TABLE 12. OUTPUT DATA, SECOND LSB .................................................................................................................................. 27
TABLE 13. OUTPUT DATA, MSB ............................................................................................................................................... 28
TABLE 14. EEPROM MEMORY MAP ........................................................................................................................................ 31
TABLE 15. T.E.D.S. (TRANSDUCER ELECTRONIC DATA SHEET, BASIC TEMPLATE) ..................................................................... 32
TABLE 16. CONTROL REGISTER MAP ........................................................................................................................................ 33
TABLE 17. CONTROL REGISTER LISTING (HIGH-LEVEL, EEPROM STARTUP, RUN & STATUS) ..................................................... 34
TABLE 17. CONTROL REGISTER LISTING (GLOBAL CONFIGURATION) .......................................................................................... 40
TABLE 18. CONTROL REGISTER LISTING (GLOBAL MAINTENANCE 1) ........................................................................................... 43
TABLE 19. CHANNEL-SPECIFIC REGISTER MAP ......................................................................................................................... 44
TABLE 21. CONTROL REGISTER LISTING (GLOBAL MAINTENANCE 2) ........................................................................................... 53
TABLE 20. EXAMPLE RESISTOR VALUES FOR AC-COUPLED, SINGLE-ENDED ................................................................................. 61
TABLE 21. EXAMPLE RESISTOR VALUES FOR DC-COUPLED, SINGLE-ENDED ................................................................................. 62
TABLE 22. EXAMPLE RESISTOR VALUES FOR AC-COUPLED, DIFFERENTIAL ................................................................................... 63
TABLE 23. EXAMPLE RESISTOR VALUES FOR DC-COUPLED, DIFFERENTIAL ................................................................................... 64