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AD7091R-5 Datasheet(PDF) 8 Page - Analog Devices |
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AD7091R-5 Datasheet(HTML) 8 Page - Analog Devices |
8 / 35 page Data Sheet AD7091R-5 Rev. 0 | Page 7 of 34 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS AD7091R-5 TOP VIEW (Not to Scale) 1 2 3 4 5 6 7 8 9 10 RESET VDD REGCAP MUXOUT GND REFIN/REFOUT AS0 ALERT/BUSY/GPO0 VIN2 VIN0 20 19 18 17 16 15 14 13 12 11 CONVST/GPO1 SCL SDA ADCIN GND AS1 GPO2 VIN3 VIN1 VDRIVE Figure 3. Pin Configuration, 20-Lead TSSOP NOTES 1. EXPOSED PAD. THE EXPOSED PAD IS NOT CONNECTED INTERNALLY. IT IS RECOMMENDED THAT THE PAD BE SOLDERED TO GND. 14 13 12 1 3 4 AS1 15 SDA GND ADCIN 11 VIN1 VDD REFIN/REFOUT 2 REGCAP GND 5 MUXOUT AD7091R-5 TOP VIEW (Not to Scale) Figure 4. Pin Configuration, 20-Lead LFCSP Table 5. Pin Function Descriptions Pin No. Mnemonic Description TSSOP LFCSP 1 19 AS0 I2C Address Bit 0. Together with AS1, the logic state of these two inputs selects a unique I2C address for the AD7091R-5. The device address depends on the logic state of these pins. 2 20 RESET Reset. Logic input. This pin resets the device when pulled low. 3 1 VDD Power Supply Input. The VDD range is from 2.7 V to 5.25 V. Decouple this supply pin to GND. 4 2 REGCAP Decoupling Capacitor Pin for Voltage Output from the Internal Regulator. Decouple this output pin separately to GND using a 2.2 µF capacitor. 5 3 REFIN/REFOUT Voltage Reference Output, 2.5 V. Decouple this pin to GND. The typical recommended decoupling capacitor value is 2.2 µF. The user can either access the internal 2.5 V reference or overdrive the internal reference with the voltage applied to this pin. The reference voltage range for an externally applied reference is 1.0 V to VDD. 6, 15 4, 13 GND Chip Ground Pins. These pins are the ground reference point for all circuitry on the AD7091R-5. 7 5 MUXOUT Multiplexer Output. The output of the multiplexer appears at this pin. If no external filtering or buffering is required, tie this pin directly to the ADCIN pin; otherwise, tie the output of the conditioning network to the ADCIN pin. 8 6 VIN0 Analog Input for Channel 0. Single-ended analog input. The analog input range is 0 V to VREF. 9 7 VIN2 Analog Input for Channel 2. Single-ended analog input. The analog input range is 0 V to VREF. 10 8 ALERT/BUSY/GPO0 This is a multifunction pin determined by the configuration register. Alert Output Pin (ALERT). When functioning as ALERT, this pin is a logic output indicating that a conversion result has fallen outside the limit of the register settings. Busy Output (BUSY). The BUSY pin indicates when a conversion is taking place. General-Purpose Digital Output 0 (GPO0). 11 9 GPO2 General-Purpose Digital Output 2. 12 10 VIN3 Analog Input for Channel 3. Single-ended analog input. The analog input range is 0 V to VREF. 13 11 VIN1 Analog Input for Channel 1. Single-ended analog input. The analog input range is 0 V to VREF. 14 12 ADCIN ADC Input. This pin allows direct access to the ADC. If no external filtering or buffering is required, tie this pin directly to the MUXOUT pin; otherwise, tie the input of the conditioning network to the MUXOUT pin. |
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