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AD7294 データシート(PDF) 8 Page - Analog Devices |
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AD7294 データシート(HTML) 8 Page - Analog Devices |
8 / 45 page AD7294 Preliminary Technical Data Rev. PrB | Page 8 of 45 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 42 41 40 39 38 37 36 35 34 33 32 31 30 29 RS2 (-) RS2(+) NC AVDD1 AGND1 AGND2 AVDD2 D2(-) D2(+) D1(+) D1(-) AGND3 AVDD3 REFOUT / REFIN DAC NC = NO CONNECT PIN 1 INDICATOR AD7294 TOP VIEW (Not to scale) NC ISENSE 1 OVERRANGE ISENSE 2 OVERRANGE DVDD DGND VDRIVE OPGND SCL SDA (I2C) / SDI (SPI) AS0 (I2C) / SDO (SPI) AS1 (I2C) / CSB (SPI) AS2 (I2C) / ALERT (SPI) ALERT (I2C) / AGND6 (SPI) AGND5 Figure 4. Table 4. Pin Function Descriptions Pin No. Mnemonic Description 1, 54 RS2(−), RS1(−) Low-Side Connection for External Sense Resistor. 2, 53 RS2(+), RS1(+) High-Side Connection for External Sense Resistor. 3, 42, 52 NC No Connection 4, 7, 13, 22, 50 AVDD1 to AVDD5 Analog Supply Pins. These pins should be decoupled with a 0.1 µF ceramic capacitor and a 10 µF tantalum capacitor. Operating range is 4.5 V to 5.5 V. 5, 6, 12, 21, 29, 49, 51 AGND 1 to AGND7 Analog Ground Reference Point. All AGND pins should be connected externally to the AGND plane. 8, 11 D2(−), D1(−) Analog Input. Connected to cathodes of the external temperature-sensing diodes. 9, 10 D2(+), D1(+) Analog Input. Connected to anodes of the external temperature-sensing diodes. 14 REFOUT/REFIN DAC The AD7294 contains a REFOUT/REFIN DAC pin common to all four DAC channels. When the internal reference is selected, this pin is the reference output. If the application requires an external reference, it can be applied to this pin, and the internal reference can be disabled via the control register. The default for this pin is a reference input. 15, 20, 23, 28 OFFSET IN A to OFFSET IN D Used to set the desired output range for each DAC channel. Input range is 0 V to 5 V. 16, 19, 24, 27 VOUT A to VOUT D Buffered Analog Outputs for DAC Channels A to D. Each analog output is driven by an output amplifier that can be offset using the offset in pin. DACs provide 12-bit resolution in a 5 V range, providing an output voltage from 0 V to 15 V. Each output is capable of sourcing and sinking 10 mA and driving a 1,000 pF load. 17, 18 DAC OUT GND AB, DAC OUT V+ AB Analog Supply Pins for Output Amplifiers on VOUTA and VOUTB. 25, 26 DAC OUT V+ CD, DAC OUT GND CD Analog Supply Pins for Output Amplifiers on VOUTC and VOUTD. 30 ALERT Digital Output. This pin acts as an out-of-range indicator and becomes active when a conversion result violates the DATAHIGH or DATALOW register values associated with each channel input. 31 to 33 AS2, AS1, AS0 Logic Inputs. These inputs are used to select unique addresses for the AD7294. Device address depends on the voltage applied to these pins. 34 SDA Digital I/O. Serial bus bidirectional data. Open-drain output. 35 SCL Digital Input. Serial bus clock. The data transfer rate in I2C mode is compatible with both 100 kHz |
同様の部品番号 - AD7294 |
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同様の説明 - AD7294 |
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