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AD1974 Datasheet(PDF) 8 Page - Analog Devices |
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AD1974 Datasheet(HTML) 8 Page - Analog Devices |
8 / 24 page AD1974 Rev. 0 | Page 8 of 24 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 48 47 46 45 44 43 42 41 40 39 38 37 13 14 15 16 17 18 19 20 21 22 23 24 AGND 1 MCLKI/XI 2 MCLKO/XO 3 AGND 4 AVDD 5 NC 6 NC 7 NC NC = NO CONNECT 8 NC 9 PD/RST 10 NC 11 DGND 12 AGND 36 FILTR 35 AGND 34 AVDD 33 AGND 32 NC 31 NC 30 NC 29 NC 28 CLATCH 27 CCLK 26 DGND 25 AD1974 TOP VIEW (Not to Scale) SINGLE-ENDED OUTPUT Figure 2. AD1974 Single-Ended Output, 48-Lead LQFP Pin Configuration Table 10. Pin Function Description Pin No. Type1 Mnemonic Description 1, 4, 32, 34, 36 I AGND Analog Ground. 2 I MCLKI/XI Master Clock Input/Crystal Oscillator Input. 3 O MCLKO/XO Master Clock Output/Crystal Oscillator Output. 5, 33, 37, 48 I AVDD Analog Power Supply. Connect to analog 3.3 V supply. 6 to 9, 11, 16, 28 to 31 NC No Connect. 10 I PD/RST Power-Down/Reset (Active Low). 12, 25 I DGND Digital Ground. 13 I DVDD Digital Power Supply. Connect to digital 3.3 V supply. 14 I/O AUXDATA2 Auxiliary Data Input 2 (From External ADC 2). 15 I/O AUXDATA1 Auxiliary Data Input 1 (From External ADC 1). 17 I/O AUXBCLK Auxiliary Bit Clock. 18 I/O AUXLRCLK Auxiliary Left-Right Framing Clock. 19 I/O ASDATA2 ADC Serial Data Output 2 (ADC 2 Left and ADC 2 Right)/ADC TDM Data Input. 20 O ASDATA1 ADC Serial Data Output 1 (ADC 1 Left and ADC 1 Right)/ADC TDM Data Output. 21 I/O ABCLK Serial Bit Clock for ADCs. 22 I/O ALRCLK Left-Right Framing Clock for ADCs. 23 I CIN Control Data Input (SPI). 24 I/O COUT Control Data Output (SPI). 26 I CCLK Control Clock Input (SPI). 27 I CLATCH Latch Input for Control Data (SPI). 35 O FILTR Voltage Reference Filter Capacitor Connection. Bypass with 10 μF||100 nF to AGND. 38 O CM Common-Mode Reference Filter Capacitor Connection. Bypass with 47 μF||100 nF to AGND. 39 I ADC1LP ADC1 Left Positive Input. 40 I ADC1LN ADC1 Left Negative Input. 41 I ADC1RP ADC1 Right Positive Input. 42 I ADC1RN ADC1 Right Negative Input. 43 I ADC2LP ADC2 Left Positive Input. |
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