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AD5222 Datasheet(PDF) 3 Page - Analog Devices

Part No. AD5222
Description  Increment/Decrement Dual Digital Potentiometer
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Maker  AD [Analog Devices]
Homepage  http://www.analog.com
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AD5222
–3–
REV. 0
ABSOLUTE MAXIMUM RATINGS
(TA = 25°C, unless otherwise noted)
VDD to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 V, +7 V
VSS to GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V, –5 V
VDD to VSS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V
VA, VB, VW to GND . . . . . . . . . . . . . . . . . . . . . . . . . . 0 V, VDD
AX – BX, AX – WX, BX – WX . . . . . . . . . . . . . . . . . . .
±20 mA
Digital Input Voltage to GND . . . . . . . . . . . . 0 V, VDD + 0.3 V
Operating Temperature Range . . . . . . . . . . . –40
°C to +85°C
Maximum Junction Temperature (TJ max) . . . . . . . . . . 150
°C
Storage Temperature . . . . . . . . . . . . . . . . . . –65
°C to +150°C
Lead Temperature (Soldering, 10 sec) . . . . . . . . . . . . . 300
°C
Package Power Dissipation . . . . . . . . . . . . . (TJ max – TA)/
θ
JA
Thermal Resistance
θ
JA,
SOIC (SO-14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
°C/W
TSSOP-14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 206
°C/W
tCSS
tCH
tCSH
tUDS
tCL
CS
CLK
U/
D
tDSS
DACSEL
tMDS
MODE
tUDH
tDSH
tMDH
Figure 2. Detail Timing Diagram
Truth Table
CS
CLK
U/
D
Operation
L
t
H
Wiper Increment Toward Terminal A
L
t
L
Wiper Decrement Toward Terminal B
H
X
X
Wiper Position Fixed
Common Mode (MODE = 0) moves both wipers together either
UP or DOWN the resistor array without changing the relative
distance between the wipers. Also, the distance between both
wipers is preserved if either reaches the end of the array. Inde-
pendent Mode (MODE = 1) allows user to control each RDAC
individually: DACSEL = 0 sets RDAC1; DACSEL = 1: sets
RDAC2.
ORDERING GUIDE
Kilo
Package
Package
Model
Ohms Temperature Description Option
AD5222BR10
10
–40
°C/+85°C SO-14
R-14
AD5222BRU10
10
–40
°C/+85°C TSSOP-14
RU-14
AD5222BR50
50
–40
°C/+85°C SO-14
R-14
AD5222BRU50
50
–40
°C/+85°C TSSOP-14
RU-14
AD5222BR100
100
–40
°C/+85°C SO-14
R-14
AD5222BRU100 100
–40
°C/+85°C TSSOP-14
RU-14
AD5222BR1M
1,000
–40
°C/+85°C SO-14
R-14
AD5222BRU1M 1,000
–40
°C/+85°C TSSOP-14
RU-14
The AD5222 die size is 56 mil
× 60 mil, 3360 sq. mil; 1.4224 mm × 1.524 mm,
2.1677 sq. mm. Contains 1503 transistors. Patent Number 5495245 applies.
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection. Although
the AD5222 features proprietary ESD protection circuitry, permanent damage may occur on
devices subjected to high energy electrostatic discharges. Therefore, proper ESD precautions are
recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
PIN FUNCTION DESCRIPTIONS
Pin Name
Description
1
B1
B Terminal RDAC #1.
2
A1
A Terminal RDAC #1.
3
W1
Wiper RDAC #1, DACSEL = 0.
4VSS
Negative Power Supply. Specified for operation
at both 0 V or –2.7 V (Sum of |VDD| + |VSS|
< 5.5 V).
5
W2
Wiper RDAC #2, DACSEL = 1.
6
A2
A Terminal RDAC #2.
7
B2
B Terminal RDAC #2.
8
GND
Ground.
9
MODE
Common MODE = 0, Independent MODE = 1.
10
DACSEL DAC Select determines which wiper is incre-
mented in the Independent MODE = 1.
DACSEL = 0 sets RDAC1, DACSEL = 1 sets
RDAC2.
11
U/
D
UP/DOWN Direction Control.
12
CLK
Serial Clock Input, Negative Edge Triggered.
13
CS
Chip Select Input, Active Low. When
CS is
high, the UP/DOWN counter is disabled.
14
VDD
Positive Power Supply. Specified for operation
at both +3 V or +5 V. (Sum of |VDD| + |VSS|
< 5.5 V).
PIN CONFIGURATION
TOP VIEW
(Not to Scale)
CLK
U/
D
A1
GND
VDD
CS
B1
W1
AD5222
1
2
3
4
5
6
78
9
10
11
12
13
14
DACSEL
MODE
VSS
W2
A2
B2




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