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AD9255BCPZRL7-125 Datasheet(PDF) 11 Page - Analog Devices |
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AD9255BCPZRL7-125 Datasheet(HTML) 11 Page - Analog Devices |
11 / 44 page Data Sheet AD9255 Rev. C | Page 11 of 44 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS 1 2 3 4 5 6 7 8 9 10 11 12 SYNC CLK+ CLK– AVDD AVDD OEB DNC DCO DNC DNC D0 (LSB) D1 DITHER AVDD SVDD CSB SCLK/DFS SDIO/DCS DRVDD DNC OR D13 (MSB) D12 35 AVDD 36 34 33 32 31 30 29 28 27 26 25 AD9255 PARALLEL CMOS TOP VIEW (Not to Scale) PIN 1 INDICATOR NOTES 1. DNC = DO NOT CONNECT. 2. THE EXPOSED THERMAL PAD ON THE BOTTOM OF THE PACKAGE PROVIDES THE ANALOG GROUND FOR THE INPUT. THIS EXPOSED PAD MUST BE CONNECTED TO GROUND FOR PROPER OPERATION. Figure 4. LFCSP Parallel CMOS Pin Configuration (Top View) Table 8. Pin Function Descriptions (Parallel CMOS Mode) Pin No. Mnemonic Type Description ADC Power Supplies 13, 20, 29 DRVDD Supply Digital Output Driver Supply (1.8 V Nominal). 4, 5, 34, 36, 45 AVDD Supply Analog Power Supply (1.8 V Nominal). 33 SVDD Supply SPI Input/Output Voltage 7, 9, 10, 28, 39, 40 DNC Do Not Connect. 0 AGND Ground Analog Ground. The exposed thermal pad on the bottom of the package provides the analog ground for the input. This exposed pad must be connected to ground for proper operation. ADC Analog 42 VIN+ Input Differential Analog Input Pin (+). 43 VIN− Input Differential Analog Input Pin (−). 38 VREF Input/output Voltage Reference Input/Output. 37 SENSE Input Voltage Reference Mode Select. See Table 11 for details. 47 RBIAS Input/output External Reference Bias Resistor. 46 VCM Output Common-Mode Level Bias Output for Analog Inputs. 2 CLK+ Input ADC Clock Input—True. 3 CLK− Input ADC Clock Input—Complement. Digital Input 1 SYNC Input Digital Synchronization Pin. Slave mode only. Digital Outputs 11 D0 (LSB) Output CMOS Output Data. 12 D1 Output CMOS Output Data. 14 D2 Output CMOS Output Data. 15 D3 Output CMOS Output Data. 16 D4 Output CMOS Output Data. 17 D5 Output CMOS Output Data. 18 D6 Output CMOS Output Data. 19 D7 Output CMOS Output Data. 21 D8 Output CMOS Output Data. |
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