Datasheet

AD5241/AD5242
Rev. C | Page 7 of 20
PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS
TOP VIEW
(Not to Scale)
14
1
NC = NO CONNECT
W
1
B
1
V
DD
SHDN
SCL
SDA
O
1
NC
O
2
V
SS
DGND
AD1
AD0
A
1
AD5241
2
3
4
5
6
7
13
12
11
10
9
8
00926-003
Figure 6. AD5241 Pin Configuration
TOP VIEW
(Not to Scale)
1
O
1
A
1
W
1
B
1
V
DD
SHDN
SCL
SDA
A
2
W
2
B
2
O
2
V
SS
DGND
AD1
AD0
AD5242
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
00926-004
Figure 7. AD5242 Pin Configuration
Table 4. AD5241 Pin Function Descriptions
Pin No. Mnemonic Description
1 A
1
Resistor Terminal A
1
.
2 W
1
Wiper Terminal W
1
.
3 B
1
Resistor Terminal B
1
.
4 V
DD
Positive Power Supply, Specified for
Operation from 2.2 V to 5.5 V.
5
SHDN
Active low, asynchronous connection of
Wiper W to Terminal B, and open circuit
of Terminal A. RDAC register contents
unchanged. SHDN should tie to V
DD
if not used.
6 SCL Serial Clock Input.
7 SDA Serial Data Input/Output.
8 AD0
Programmable Address Bit for Multiple
Package Decoding. Bit AD0 and Bit AD1
provide four possible addresses.
9 AD1
Programmable Address Bit for Multiple
Package Decoding. Bit AD0 and Bit AD1
provide four possible addresses.
10 DGND Common Ground.
11 V
SS
Negative Power Supply, Specified for
Operation from 0 V to −2.7 V.
12 O
2
Logic Output Terminal O
2
.
13 NC No Connect.
14 O
1
Logic Output Terminal O
1
.
Table 5. AD5242 Pin Function Descriptions
Pin No. Mnemonic Description
1 O
1
Logic Output Terminal O
1
.
2 A
1
Resistor Terminal A
1
.
3 W
1
Wiper Terminal W
1
.
4 B
1
Resistor Terminal B
1
.
5 V
DD
Positive Power Supply, Specified for
Operation from 2.2 V to 5.5 V.
6
SHDN
Active Low, Asynchronous Connection
of Wiper W to Terminal B, and Open
Circuit of Terminal A. RDAC register
contents unchanged. SHDN should
tie to V
DD
, if not used.
7 SCL
Serial Clock Input.
8 SDA
Serial Data Input/Output.
9 AD0
Programmable Address Bit for Multiple
Package Decoding. Bit AD0 and Bit AD1
provide four possible addresses.
10 AD1
Programmable Address Bit for Multiple
Package Decoding. Bit AD0 and Bit AD1
provide four possible addresses.
11 DGND
Common Ground.
12 V
SS
Negative Power Supply, Specified for
Operation from 0 V to −2.7 V.
13 O
2
Logic Output Terminal O
2
.
14 B
2
Resistor Terminal B
2
.
15 W
2
Wiper Terminal W
2
.
16 A
2
Resistor Terminal A
2
.