Datasheet

AD7991/AD7995/AD7999
Rev. B | Page 12 of 28
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
06461-003
SCL
1
SDA
2
V
IN0
3
V
IN1
4
V
DD
8
GND 7
V
IN3
/V
REF
6
V
IN2
5
AD7991/
AD7995/
AD7999
TOP VIEW
(Not to Scale)
Figure 3. SOT-23 Pin Configuration
Table 7. Pin Function Descriptions
Pin
No.
Mnemonic Description
1 SCL Digital Input. Serial bus clock. External pull-up resistor required.
2 SDA Digital I/O. Serial bus bidirectional data. Open-drain output. External pull-up resistor required.
3 V
IN0
Analog Input 1. Single-ended analog input channel. The input range is 0 V to V
REF
.
4 V
IN1
Analog Input 2. Single-ended analog input channel. The input range is 0 V to V
REF
.
5 V
IN2
Analog Input 3. Single-ended analog input channel. The input range is 0 V to V
REF
.
6 V
IN3
/V
REF
Analog Input 4. Single-ended analog input channel. The input range is 0 V to V
REF
. Can also be used to input an
external V
REF
signal.
7 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.
8 V
DD
Power Supply Input. The V
DD
range for the AD7991/AD7995/AD7999 is from 2.7 V to 5.5 V.
Table 8. I
2
C Address Selection
Part Number I
2
C Address
AD7991-0 010 1000
AD7991-1 010 1001
AD7995-0 010 1000
AD7995-1 010 1001
AD7999-1 010 1001