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AD7911ARM-REEL7 データシート(PDF) 10 Page - Analog Devices |
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AD7911ARM-REEL7 データシート(HTML) 10 Page - Analog Devices |
10 / 28 page AD7911/AD7921 Rev. A | Page 10 of 28 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS VIN1 VIN0 GND VDD 8 7 6 5 DIN 1 SCLK 2 CS 3 DOUT 4 AD7911/ AD7921 8-LEAD TSOT TOP VIEW (Not to Scale) Figure 8. 8-Lead TSOT Pin Configuration VDD GND VIN0 VIN1 8 7 6 5 DOUT 1 CS 2 SCLK 3 DIN 4 AD7911/ AD7921 8-LEAD MSOP TOP VIEW (Not to Scale) Figure 9. 8-Lead MSOP Pin Configuration Table 5. Pin Function Descriptions TSOT Pin No. MSOP Pin No. Mnemonic Function 1 4 DIN Data In. Logic input. The channel to be converted is provided on this input and is clocked into an internal register on the falling edge of SCLK. 2 3 SCLK Serial Clock. Logic input. SCLK provides the serial clock for accessing data from the part. This clock input is also used as the clock source for the AD7911/AD7921’s conversion process. 3 2 CS Chip Select. Active low logic input. This input provides the dual function of initiating conversions on the AD7911/AD7921 and framing the serial data transfer. 4 1 DOUT Data Out. Logic output. The conversion result from the AD7911/AD7921 is provided on this output as a serial data stream. The bits are clocked out on the falling edge of the SCLK signal. For the AD7921, the data stream consists of two leading zeros; the channel identifier bit, which identifies the channel that the conversion result corresponds to; followed by an invalid bit that matches up to the channel identifier bit; followed by the 12 bits of conversion data, with MSB first. For the AD7911, the data stream consists of two leading zeros; the channel identifier bit, which identifies the channel that the conversion result corresponds to; followed by an invalid bit that matches up to the channel identifier bit; followed by the 10 bits of conversion data, with MSB first and two trailing zeros. 5 8 VDD Power Supply Input. The VDD range for the AD7911/AD7921 is from 2.35 V to 5.25 V. 6 7 GND Analog Ground. Ground reference point for all circuitry on the AD7911/AD7921. All analog input signals should be referred to this GND voltage. 7, 8 6, 5 VIN0, VIN1 Analog Inputs. These two single-ended analog input channels are multiplexed into the on-chip track- and-hold amplifier. The analog input channel to be converted is selected by writing to the third MSB on the DIN pin. The input range is 0 to VDD. |
同様の部品番号 - AD7911ARM-REEL7 |
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同様の説明 - AD7911ARM-REEL7 |
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