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AD9910 数据表(PDF) 10 Page - Analog Devices |
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AD9910 数据表(HTML) 10 Page - Analog Devices |
10 / 60 page AD9910 Rev. 0 | Page 10 of 60 Table 3. Pin Function Descriptions Pin No. Mnemonic I/O1 Description 1, 20, 72, 86, 87, 93, 97 to 100 NC Not Connected. Allow device pins to float. 2 PLL_LOOP_FILTER I PLL Loop Filter Compensation Pin. See the External PLL Loop Filter Components section for details. 3, 6, 89, 92 AVDD (1.8V) Analog Core VDD, 1.8 V Analog Supplies. 74 to 77, 83 AVDD (3.3V) Analog DAC VDD, 3.3 V Analog Supplies. 17, 23, 30, 47, 57, 64 DVDD (1.8V) Digital Core VDD, 1.8 V Digital Supplies. 11, 15, 21, 28, 45, 56, 66 DVDD_I/O (3.3V) Digital Input/Output VDD, 3.3 V Digital Supplies. 4, 5, 73, 78, 79, 82, 85, 88, 96 AGND Analog Ground. 13, 16, 22, 29, 46, 51, 58, 65 DGND Digital Ground. 7 SYNC_IN+ I Synchronization Signal, Digital Input (Rising Edge Active). The synchronization signal from the external master to synchronize internal subclocks. See the Synchronization of Multiple Devices section for details. 8 SYNC_IN− I Synchronization Signal, Digital Input (Rising Edge Active). The synchronization signal from the external master to synchronize internal subclocks. See the Synchronization of Multiple Devices section for details. 9 SYNC_OUT+ O Synchronization Signal, Digital Output (Rising Edge Active). The synchronization signal from the internal device subclocks to synchronize external slave devices. See the Synchronization of Multiple Devices section for details. 10 SYNC_OUT− O Synchronization Signal, Digital Output (Rising Edge Active). The synchronization signal from the internal device subclocks to synchronize external slave devices. See the Synchronization of Multiple Devices section for details. 12 SYNC_SMP_ERR O Synchronization Sample Error, Digital Output (Active High). Sync sample error: a high on this pin indicates that the AD9910 did not receive a valid sync signal on SYNC_IN+/SYNC_IN−. 14 MASTER_RESET I Master Reset, Digital Input (Active High). Master reset: clears all memory elements and sets registers to default values. 18 EXT_PWR_DWN I External Power-Down, Digital Input (Active High). A high level on this pin initiates the currently programmed power-down mode. See the Power-Down Control section of this document for further details. If unused, connect to ground. 19 PLL_LOCK O Clock Multiplier PLL Lock, Digital Output (Active High). A high on this pin indicates the Clock Multiplier PLL has acquired lock to the reference clock input. 24 RAM_SWP_OVR O RAM Sweep Over, Digital Output (Active High). A high on this pin indicates the RAM sweep profile has completed. 25 to 27, 31 to 39, 42 to 44, 48 D<15:0> I Parallel Input Bus (Active High). 49, 50 F<1:0> I Modulation Format Pin. Digital input to determine the modulation format. 40 PDCLK O Parallel Data Clock. This is the digital output (clock). The parallel data clock provides a timing signal for aligning data at the parallel inputs. 41 TxENABLE I Transmit Enable. Digital input (active high). In burst mode communications, a high on this pin indicates new data for transmission. In continuous mode, this pin remains high. 52 to 54 PROFILE<2:0> I Profile Select Pins. Digital inputs (active high). Use these pins to select one of eight phase/frequency profiles for the DDS. Changing the state of one of these pins transfers the current contents of all I/O buffers to the corresponding registers. State changes should be set up on the SYNC_CLK pin. 55 SYNC_CLK O Output Clock Divided-By-Four. A digital output (clock). Many of the digital inputs on the chip, such as I/O_UPDATE and PROFILE<2:0> need to be set up on the rising edge of this signal. |
类似零件编号 - AD9910_07 |
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类似说明 - AD9910_07 |
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