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AD7641BCPZ 데이터시트(PDF) 9 Page - Analog Devices |
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AD7641BCPZ 데이터시트(HTML) 9 Page - Analog Devices |
9 / 14 page Preliminary Technical Data AD7631/AD7634 Rev. PrC | Page 9 of 14 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) BIPOLAR CNVST PD RESET CS RD TEN AGND AVDD MODE0 MODE1 D0/OB/2C NC = NO CONNECT D1/A0 D3 D4DIVSCLK[0] BUSY D17/SPPEN D16/SPPCLK D15/SPPDATA AD7631/AD7634 D5/DIVSCLK[1] D14/HW/SW IMPULSE WARP D2/A1 Figure 4. Pin Configuration Table 6. Pin Function Descriptions Pin No. Description Mnemonic Type1 1, 42 AGND P Analog Power Ground Pin. 2, 44 AVDD P Input Analog Power Pins. Nominally 5 V. 3, 4 MODE[0:1] DI Data Output Interface Mode Selection. Interface MODE# MODE1 MODE0 Description 0 0 0 18-bit interface 1 0 1 16-bit interface 2 1 0 8-bit (byte) interface 3 1 1 Serial interface 5 D0/OB/2C DI/O When MODE[1:0] = 0 (18-bit interface mode), this pin is Bit 0 of the parallel port data output bus and the data coding is straight binary. In all other modes, this pin allows the choice of straight 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. 6 WARP DI AD7634: Conversion Mode Selection. When WARP = high and IMPULSE = low, this selects warp mode. In this mode, the maximum throughput is achievable, and a minimum conversion rate must be applied to guarantee full specified accuracy. When WARP = low and IMPULSE = low, this selects normal mode where full accuracy is maintained independent of the minimum conversion rate. AD7631: Connect to DGND. 7 IMPULSE DI AD7634: Conversion Mode Selection. When IMPULSE = high and WARP = low, this input selects impulse mode, a reduced power mode. In this mode, the power dissipation is approximately scaled proportional to the sampling rate. AD7631: Connect to DGND. 8 D1/A0 DI/O When MODE[1:0] = 0, this pin is Bit 1 of the parallel port data output bus. In all other modes, this input pin controls the form in which data is output as shown in Table 7. 9 D2/A1 DI/O When MODE[1:0] = 0, this pin is Bit 2 of the parallel port data output bus. When MODE[1:0] = 1 or 2, this input pin controls the form in which data is output as shown in Table 7. 10 D3 D0 When MODE[1:0] = 0, 1, or 2, this output is used as Bit 3 of the parallel port data output bus. This pin is always an output, regardless of the interface mode. |
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