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AD7993BRU-1 Folha de dados(PDF) 8 Page - Analog Devices |
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AD7993BRU-1 Folha de dados(HTML) 8 Page - Analog Devices |
8 / 27 page AD7994/AD7993 –8– REV. PrF PRELIMINARYTECHNICAL DATA PIN FUNCTION DESCRIPTION Pin Mnemonic Function AGND Analog Ground. Ground reference point for all circuitry on the AD7994/AD7993. All analog input signals should be referred to this GND voltage. V DD Power Supply Input. The VDD range for the AD7994/AD7993 is from +2.7V to +5.5V. REFIN Voltage Reference Input. The External Reference for the AD7994/AD7993 should 0.1 µF capacitor should be placed between the REFIN pin and AGND. VIN1 Analog Input 1. Single-ended analog input channel. The input range is 0V to REFIN. VIN3 Analog Input 3. Single-ended analog input channel. The input range is 0V to REFIN. VIN4 Analog Input 4. Single-ended analog input channel. The input range is 0V to REFIN. VIN2 Analog Input 2. Single-ended analog input channel. The input range is 0V to REFIN. A S Logic Input. Address Select Input which selects one of three I 2C addresses for the AD7994/ AD7993 as shown in Table I. CONVST Logic Input Signal. Convert Start Signal. This is an edge triggered logic input. The rising edge of this signal powers up the part. The power up time for the part is 1 µs. The falling edge of CONVST places the track/hold into hold mode and initiates a conversion. A power up time of at least 1 µs must be allowed for the CONVST high pulse, otherwise the conver- sion result will be invalid. (See Modes of Operation Section) ALERT/BUSY Digital Output, selectable as an ALERT or BUSY output function. When configured as an ALERT output, this pin acts as an Out of Range Indicator, and if enabled becomes active when the conversion result violates the DATAHIGH or DATALOW values. See Limit Registers section. When configured as a BUSY output, this pin becomes active when a conversion is in progress. S D A Digital I/O. Serial Bus Bi-directional Data. Open-drain output. External pull-up resistor required. S C L Digital Input. Serial Bus Clock. External pull-up resistor required. AD7994/AD7993 PIN CONFIGURATION TSSOP AD7994 TOP VIEW 1 2 3 4 13 14 15 16 CONVST SDA SCL VDD AGND VIN4 5 (Not to Scale) ALERT 12 AGND 11 AS 10 9 AGND REFIN 6 VIN1 7 VIN3 8 AGND AGND VIN2 |
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Descrição semelhante - AD7993BRU-1 |
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