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AD7997BRU-0REEL датащи(PDF) 10 Page - Analog Devices |
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AD7997BRU-0REEL датащи(HTML) 10 Page - Analog Devices |
10 / 32 page AD7997/AD7998 Rev. 0 | Page 10 of 32 PIN CONFIGURATION AND PIN FUNCTION DESCRIPTIONS AD7997/ AD7998 TOP VIEW 1 2 3 4 17 18 19 20 SDA SCL VDD AGND VIN4 14 13 VIN2 5 (Not to Scale) ALERT/BUSY 16 VDD 15 AS AGND REFIN 6 VIN1 7 VIN3 8 AGND AGND VIN5 9 VIN7 10 VIN8 12 11 VIN6 CONVST Figure 3. AD7998/AD7997 Pin Configuration Table 5. Pin Function Descriptions Pin No. Mnemonic Function 1, 3, 4, 20 AGND Analog Ground. Ground reference point for all circuitry on the AD7997/AD7998. All analog input signals should be referred to this AGND voltage. 2, 5 VDD Power Supply Input. The VDD range for the AD7997/AD7998 is from 2.7 V to 5.5 V. 6 REFIN Voltage Reference Input. The external reference for the AD7997/AD7998 should be applied to this input pin. The voltage range for the external reference is 1.2 V to VDD. A 0.1 µF and 1 µF capacitors should be placed between REFIN and AGND. See Typical Connection Diagram. 7 VIN1 Analog Input 1. Single-ended analog input channel. The input range is 0 V to REFIN. 8 VIN3 Analog Input 3. Single-ended analog input channel. The input range is 0 V to REFIN. 9 VIN5 Analog Input 5. Single-ended analog input channel. The input range is 0 V to REFIN. 10 VIN7 Analog Input 7. Single-ended analog input channel. The input range is 0 V to REFIN. 11 VIN8 Analog Input 8. Single-ended analog input channel. The input range is 0 V to REFIN. 12 VIN6 Analog Input 6. Single-ended analog input channel. The input range is 0 V to REFIN. 13 VIN4 Analog Input 4. Single-ended analog input channel. The input range is 0 V to REFIN. 14 VIN2 Analog Input 2. Single-ended analog input channel. The input range is 0 V to REFIN. 15 AS Logic Input. Address select input that selects one of three I2C addresses for the AD7997/AD7998, as shown in Table 6. The device address depends on the voltage applied to this pin. 16 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 conversion result is invalid (see the Modes of Operation section). 17 ALERT/BUSY Digital Output. Selectable as an ALERT or BUSY output function. When configured as an ALERT, this pin acts as an out- of-range indicator and, if enabled, becomes active when the conversion result violates the DATAHIGH or DATALOW register values. See the Limit Registers section. When configured as a BUSY output, this pin becomes active when a conversion is in progress. Open-drain output. 18 SDA Digital I/O. Serial bus bidirectional data. Open-drain output. External pull-up resistor required. 19 SCL Digital Input. Serial bus clock. Open-drain input. External pull-up resistor required. Table 6. I2C Address Selection Part Number AS Pin I2C Address AD7997-0 AGND 010 0001 AD7997-0 VDD 010 0010 AD7997-1 AGND 010 0011 AD7997-1 VDD 010 0100 AD7997-x1 Float 010 0000 AD7998-0 AGND 010 0001 AD7998-0 VDD 010 0010 AD7998-1 AGND 010 0011 AD7998-1 VDD 010 0100 AD7998-x1 Float 010 0000 1 If the AS pin is left floating on any of the AD7997/AD7998 parts, the device address is 010 0000. |
Аналогичный номер детали - AD7997BRU-0REEL |
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Аналогичное описание - AD7997BRU-0REEL |
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