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AD7674 Datenblatt(PDF) 8 Page - Analog Devices |
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AD7674 Datenblatt(HTML) 8 Page - Analog Devices |
8 / 28 page AD7652 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 36 35 34 33 32 31 30 29 28 27 26 25 13 14 15 16 17 18 19 20 21 22 23 24 1 2 3 4 5 6 7 8 9 10 11 12 48 47 46 45 44 39 38 37 43 42 41 40 PIN 1 IDENTIFIER TOP VIEW (Not to Scale) AGND CNVST PD RESET CS RD DGND AGND AVDD NC BYTESWAP OB/2C NC NC NC = NO CONNECT SER/PAR D0 D1 BUSY D15 D14 D13 AD7652 D3/DIVSCLK1 D12 02965-0-002 D2/DIVSCLK0 Figure 4. 48-Lead LQFP (ST-48) and 48-Lead LFCSP (CP-48) Table 6. Pin Function Descriptions Pin No. Mnemonic Type1 Description 1, 36, 41, 42 AGND P Analog Power Ground Pin. 2, 44 AVDD P Input Analog Power Pin. Nominally 5 V. 3, 6, 7, 40 NC No Connect. 4 BYTESWAP DI Parallel Mode Selection (8-/16-bit). When LOW, the LSB is output on D[7:0] and the MSB is output on D[15:8]. When HIGH, the LSB is output on D[15:8] and the MSB is output on D[7:0]. 5 OB/2C DI Straight Binary/Binary Twos Complement. When OB/2C is HIGH, the digital output is straight binary; when LOW, the MSB is inverted, resulting in a twos complement output from its internal shift register. 8 SER/PAR DI Serial/Parallel Selection Input. When LOW, the parallel port is selected; when HIGH, the serial interface mode is selected and some bits of the DATA bus are used as a serial port. 9, 10 D[0:1] DO Bit 0 and Bit 1 of the Parallel Port Data Output Bus. When SER/PAR is HIGH, these outputs are in high impedance. 11, 12 D[2:3]or DIVSCLK[0:1] DI/O When SER/PAR is LOW, these outputs are used as Bit 2 and Bit 3 of the parallel port data output bus. When SER/PAR is HIGH, EXT/INT is LOW, and RDC/SDIN is LOW (serial master read after convert), these inputs, part of the serial port, are used to slow down, if desired, the internal serial clock that clocks the data output. In other serial modes, these pins are not used. 13 D4 or EXT/INT DI/O When SER/PAR is LOW, this output is used as Bit 4 of the parallel port data output bus. When SER/PAR is HIGH, this input, part of the serial port, is used as a digital select input for choosing the internal data clock or an external data clock. With EXT/INT tied LOW, the internal clock is selected on the SCLK output. With EXT/INT set to a logic HIGH, output data is synchronized to an external clock signal connected to the SCLK input. 14 D5 or INVSYNC DI/O When SER/PAR is LOW, this output is used as Bit 5 of the parallel port data output bus. When SER/PAR is HIGH, this input, part of the serial port, is used to select the active state of the SYNC signal. It is active in both master and slave modes. When LOW, SYNC is active HIGH. When HIGH, SYNC is active LOW. 15 D6 or INVSCLK DI/O When SER/PAR is LOW, this output is used as Bit 6 of the parallel port data output bus. When SER/PAR is HIGH, this input, part of the serial port, is used to invert the SCLK signal. It is active in both master and slave modes. Rev. 0 | Page 8 of 28 |
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Ähnliche Beschreibung - AD7674 |
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