Specifications

DATA SHEET QF4A512
Rev D4, Dec 07 2 www.quickfiltertech.com
TABLE OF CONTENTS
1. SPECIFICATIONS .............................................................................................................................................................. 4
1.1 ABSOLUTE MAXIMUM RATINGS ........................................................................................................................................ 4
1.2 PACKAGE ASSEMBLY ...................................................................................................................................................... 4
1.3 RECOMMENDED OPERATING CONDITIONS ........................................................................................................................ 4
1.4 ELECTRICAL CHARACTERISTICS ...................................................................................................................................... 5
1.5 TIMING REQUIREMENTS ................................................................................................................................................... 7
1.6 TYPICAL PERFORMANCE CHARACTERISTICS .................................................................................................................... 8
2. PINOUT AND PIN DESCRIPTIONS ................................................................................................................................... 9
2.1 PINOUT ........................................................................................................................................................................... 9
2.2 PIN DESCRIPTIONS .......................................................................................................................................................... 9
3. GENERAL DESCRIPTION ............................................................................................................................................... 11
3.1 ANALOG FRONT END (AFE) .......................................................................................................................................... 11
3.2 ANALOG TO DIGITAL CONVERTER (ADC) ....................................................................................................................... 11
3.3 FINITE IMPULSE RESPONSE FILTER (FIR) ....................................................................................................................... 12
3.4 SERIAL INTERFACE - SERIAL PERIPHERAL INTERFACE (SPI) ........................................................................................... 12
3.5 STARTUP MODES .......................................................................................................................................................... 12
3.6 MEMORY ....................................................................................................................................................................... 12
4. SOFTWARE ...................................................................................................................................................................... 13
4.1 DEVICE CONFIGURATION ............................................................................................................................................... 13
4.2 QUICKFILTER DEVELOPMENT KIT (QF4A512DK) ........................................................................................................... 13
4.3 IN-CIRCUIT (RE)CONFIGURATION .................................................................................................................................... 13
5. STARTUP ......................................................................................................................................................................... 14
5.1 POWER UP / RESET SEQUENCE ...................................................................................................................................... 14
5.2 EXTENDED INITIALIZATION ............................................................................................................................................. 15
5.3 CALIBRATION ................................................................................................................................................................ 16
6. ANALOG FRONT END (AFE) .......................................................................................................................................... 17
6.1 CONFIGURABLE PARAMETERS ....................................................................................................................................... 17
6.2 CHOPPER-STABILIZED AMPLIFIER .................................................................................................................................. 17
6.3 PROGRAMMABLE GAIN AMPLIFIER (PGA) ...................................................................................................................... 17
6.4 INPUT VOLTAGE LEVELS ................................................................................................................................................ 18
6.5 ANTI-ALIASING FILTER (AAF) ....................................................................................................................................... 18
6.6 ENABLING CHANNELS ................................................................................................................................................... 18
7. ANALOG TO DIGITAL CONVERTER ............................................................................................................................. 19
7.1 OVERVIEW .................................................................................................................................................................... 19
7.2 SAMPLING RATES / ENOB ............................................................................................................................................ 19
7.3 AGGREGATE BANDWIDTH .............................................................................................................................................. 19
7.4 SERIAL INTERFACE ........................................................................................................................................................ 20
7.5 DATA FORMAT .............................................................................................................................................................. 20
7.6 ANALOG MUX ............................................................................................................................................................... 20
7.7 GAIN AND OFFSET CALIBRATION ................................................................................................................................... 20
7.8 FACTORY CALIBRATION ................................................................................................................................................. 20
7.9 USER (SYSTEM LEVEL) CALIBRATION ............................................................................................................................. 21
8. FIR FILTERS .................................................................................................................................................................... 22
8.1 FIR OVERVIEW ............................................................................................................................................................. 22
8.2 FIR MEMORY LOCATIONS .............................................................................................................................................. 22
8.3 FIR LATENCY................................................................................................................................................................ 23
8.4 MAXIMUM NUMBER OF TAPS ........................................................................................................................................... 23