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AD7656ABSTZ 데이터시트(PDF) 8 Page - Analog Devices |
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AD7656ABSTZ 데이터시트(HTML) 8 Page - Analog Devices |
8 / 29 page Data Sheet AD7656A PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49 47 AVCC 46 AVCC 45 V5 42 V4 43 AGND 44 AGND 48 V6 41 AVCC 40 AVCC 39 V3 37 AGND 36 V2 35 AVCC 34 AVCC 33 V1 38 AGND 2 DB13 3 DB12 4 DB11 7 DB8/DOUT A 6 DB9/DOUT B 5 DB10/DOUT C 1 DB14/REFBUFEN/DIS 8 DGND 9 VDRIVE 10 DB7/HBEN/DCEN 12 DB5/DCIN A 13 DB4/DCIN B 14 DB3/DCIN C 15 DB2/SEL C 16 DB1/SEL B 11 DB6/SCLK 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 PIN 1 AD7656A TOP VIEW (Not to Scale) Figure 3. Pin Configuration Table 5. Pin Function Descriptions1 Pin No. Mnemonic Description 1 DB14/REFBUFEN/DIS Data Bit 14/Reference Buffer Enable and Disable. When SER/PAR/SEL = 0, this pin acts as a three- state digital input/output pin. 2, 3, 64 DB13, DB12, DB15 Data Bit 13, Data Bit 12, and Data Bit 15. When SER/PAR/SEL = 0, these pins act as three-state parallel digital input/output pins. When CS and RD are low, these pins are used to output the conversion result. When CS and WR are low, these pins are used to write to the control register. When SER/PAR/SEL = 1, tie these pins to DGND. 4 DB11 Data Bit 11/Digital Ground. When SER/PAR/SEL = 0, this pin acts as a three-state parallel digital output pin. When SER/PAR/SEL = 1, tie this pin to DGND. 5 DB10/DOUT C Data Bit 10/Serial Data Output C. When SER/PAR/SEL = 0, this pin acts as a three-state parallel digital output pin. When SER/PAR/SEL = 1 and SEL C = 1, this pin takes on its DOUT C function and outputs serial conversion data. this pin configures the serial interface to have three DOUT x output lines. 6 DB9/DOUT B Data Bit 9/Serial Data Output B. When SER/PAR/SEL = 0, Pin 6 acts as a three-state parallel digital output pin. When SER/PAR/SEL = 1 and SEL B = 1, Pin 6 takes on its DOUT B function and outputs serial conversion data. this pin configures the serial interface to have two DOUT x output lines. 7 DB8/DOUT A Data Bit 8/Serial Data Output A. When SER/PAR/SEL = 0, this pin acts as a three-state parallel digital output pin. When SER/PAR/SEL = 1 and SEL A = 1, this pin takes on its DOUT A function and outputs serial conversion data. 8, 25 DGND Digital Ground. These pins are the ground reference point for all digital circuitry on the AD7656A. Connect both DGND pins to the DGND plane of a system. Ideally, the DGND and AGND voltages are at the same potential and must not be more than 0.3 V apart, even on a transient basis. 9 VDRIVE Logic Power Supply Input. The voltage supplied at this pin determines the operating voltage of the interface. Nominally, it is at the same supply as the supply of the host interface. Decouple this pin to DGND, and place 10 µF and 100 nF decoupling capacitors on the VDRIVE pin. Rev. 0 | Page 7 of 28 |
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