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AD7992BRMZ-1 датащи(PDF) 8 Page - Analog Devices |
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AD7992BRMZ-1 датащи(HTML) 8 Page - Analog Devices |
8 / 28 page AD7992 Rev. 0 | Page 8 of 28 PIN CONFIGURATION AND PIN FUNCTION DESCRIPTIONS AD7992 TOP VIEW 1 2 3 4 7 8 9 10 SDA SCL VDD AGND AGND 5 (Not to Scale) ALERT 6 AS VIN1 VIN2/REFIN CONVST Figure 3. AD7992 Pin Configuration Table 5. Pin Function Descriptions Pin No. Mnemonic Function 2, 7 AGND Analog Ground. Ground reference point for all circuitry on the AD7992. All analog input signals should be referred to this GND voltage. 3 VDD Power Supply Input. The VDD range for the AD7992 is from 2.7 V to 5.5 V. 4 VIN2/REFIN Analog Input 2/Voltage Reference Input. In single-channel mode, this pin becomes the reference voltage input; an external reference should be applied at this pin. The external reference input range is 1.2 V to VDD. A 0.1 µF and 1µF capacitor should be tied between this pin and AGND. If Bit D6 is set to 1 in the configuration register, the AD7992 operates in single-channel mode. In dual-channel mode, D6 in the configuration register is 0; in this case, this pin provides the second analog input channel. The reference voltage for the AD7992 is taken from the power supply voltage in dual-channel mode. See the Configuration Register section and Table 10. 5 VIN1 Analog Input 1. Single-ended analog input channel. The input range is 0 V to REFIN. 6 AS Logic Input. Address select input that selects one of three I2C addresses for the AD7992, as shown in Table 6. 1 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-and- 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). 8 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. An external pull-up resistor is required. 9 SDA Digital I/O. Serial bus bidirectional data. Open-drain output. An external pull-up resistor is required. 10 SCL Digital Input. Serial bus clock. Open-drain output. An external pull-up resistor is required. Table 6. I2C Address Selection Part Number AS Pin I2C Address AD7992-0 GND 010 0001 AD7992-0 VDD 010 0010 AD7992-1 GND 010 0011 AD7992-1 VDD 010 0100 AD7992-x1 Float 010 0000 1 If the AS pin is left floating on any of the AD7992 parts, the device address is 010 0000. This gives each AD7992 device three different address options. |
Аналогичный номер детали - AD7992BRMZ-1 |
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Аналогичное описание - AD7992BRMZ-1 |
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