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AD7686 Folha de dados(PDF) 8 Page - Analog Devices |
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AD7686 Folha de dados(HTML) 8 Page - Analog Devices |
8 / 29 page Data Sheet AD7903 Rev. A | Page 7 of 28 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Figure 4. Pin Configuration Table 6. Pin Function Descriptions Pin No. Mnemonic Type1 Description 1, 6 REF1, REF2 AI Reference Input Voltage. The REFx range is 2.4 V to 5.1 V. These pins are referred to the GND pin, and decouple each pin closely to the GND pin with a 10 µF capacitor. 2, 7 VDD1, VDD2 P Power Supplies. 3, 8 IN1+, IN2+ AI Differential Positive Analog Inputs. 4, 9 IN1−, IN2− AI Differential Negative Analog Inputs. 5, 10 GND P Power Supply Ground. 11, 16 CNV2, CNV1 DI Conversion Inputs. These inputs have multiple functions. On the leading edge, they initiate conversions and select the interface mode of the device: chain mode or active low chip select (CS) mode. In CS mode, the SDOx pins are enabled when the CNVx pins are low. In chain mode, the data must be read when the CNVx pins are high. 12, 17 SDO2, SDO1 DO Serial Data Outputs. The conversion result is output on these pins. The conversion result is synchronized to SCKx. 13, 18 SCK2, SCK1 DI Serial Data Clock Inputs. When the device is selected, the conversion results are shifted out by these clocks. 14, 19 SDI2, SDI1 DI Serial Data Inputs. These inputs provide multiple functions. They select the interface mode of the ADC, as follows: CS mode is selected if the SDIx pins are high during the CNVx rising edge. In this mode, either SDIx or CNVx can enable the serial output signals when low. If SDIx or CNVx is low when the conversion is complete, the busy indicator feature is enabled. 15, 20 VIO2, VIO1 P Input/Output Interface Digital Power. Nominally at the same supply as the host interface (2.5 V or 3.3 V). 1 AI = analog input, DI = digital input, DO = digital output, and P = power. 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 VDD1 IN1+ IN1– VDD2 REF2 GND REF1 SDI1 SCK1 SDO1 SDI2 VIO2 CNV1 GND IN2– IN2+ CNV2 SDO2 SCK2 VIO1 AD7903 TOP VIEW (Not to Scale) |
Nº de peça semelhante - AD7686 |
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Descrição semelhante - AD7686 |
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