AD7991 datasheet(12/25 Pages) AD

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AD7991/AD7995/AD7999

Preliminary Technical Data

Rev.PrB | Page 12 of 25

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

AD7991/

AD7995/

AD7999

TOP VIEW

SDA

SCL

GND

(Not to Scale)

VDD

VIN3/VREF

VIN2

VIN1

VIN0

Figure 3.AD7991/AD7995/AD7999 Pin Configuration

Table 7. Pin Function Descriptions

Pin No.

Mnemonic

Function

SCL

Digital Input. Serial bus clock. External pull-up resistor required.

SDA

Digital I/O. Serial bus bidirectional data. Open-drain output. External pull-up resistor required.

VIN0

Analog Input 1. Single-ended analog input channel. The input range is 0 V to Vref.

VIN1

Analog Input 2. Single-ended analog input channel. The input range is 0 V to Vref.

VIN2

Analog Input 3. Single-ended analog input channel. The input range is 0 V to Vref.

VIN3/VREF

Analog Input 4. Single-ended analog input channel. The input range is 0 V to Vref. Can also be used to input an

external Vref signal.

GND

Analog Ground. Ground reference point for all circuitry on the AD7991/AD7995/AD7999. All analog input

signals should be referred to this AGND voltage.

VDD

Power Supply Input. The VDD range for the AD7991/AD7995/AD7999 is from 2.7 V to 5.5 V.

Table 8. I2C Address Selection

Part Number

I2C Address

AD7991 -0

010 1000

AD7991-1

010 1001

AD7995-0

010 1000

AD7995-1

010 1001

AD7999-0

010 1000

AD7999-1

010 1001

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