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PDF DS4301 Data sheet ( Hoja de datos )
| Número de pieza | DS4301 | |
| Descripción | Nonvolatile/ 32-Position Digital Potentiometer | |
| Fabricantes | Dallas Semiconducotr | |
| Logotipo |  |
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Rev 0; 8/03
Nonvolatile, 32-Position Digital Potentiometer
General Description
The DS4301 is a single 32-position linear digital poten-
tiometer with 200kΩ end-to-end resistance. The wiper
setting is stored in EEPROM, so the DS4301 powers up
with the last stored setting. The position of the wiper is
controlled through a simple three-terminal
increment/decrement interface. The DS4301 is ideal for
white LED backlight brightness control. Its 8-pin µSOP
package, 2.4V to 5.5V supply range, and 200kΩ end-
to-end resistance are especially suited for portable,
battery-powered applications such as cellular tele-
phones and PDAs.
Applications
White LED Backlight Brightness Control
Portable Battery-Powered Devices such as PDAs
and Cellular Phones
Any Application that Requires a Small, Low-Cost
NV Potentiometer
Features
♦ Single, 32-Position, 200kΩ Linear Nonvolatile (NV)
Potentiometer Ideal for Battery-Powered
Applications
♦ Three-Terminal Increment/Decrement Interface to
Adjust Wiper Position
♦ Wide Voltage Supply Range (2.4V to 5.5V)
♦ Command-Initiated NV Wiper Storage
♦ Operates Over the Industrial Temperature Range
(-40°C to +85°C)
♦ Available in 8-Pin µSOP
Ordering Information
PART
DS4301U-200
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
8 µSOP (118 mil)
TOP VIEW
Pin Configuration
INC 1
U/D 2
H3
GND 4
DS4301
µSOP
8 VCC
7 CS
6L
5W
Typical Operating Circuit
VCC
VCC
VREF VCC
10µH
0.1µF
VCC
H 1µF
10µF
CONTROL
INTERFACE
DS4301 W
CS
INC L
U/D
GND
VCC EXT
ADJ
WHITE LED
CURRENT
CS
REGULATOR FB
GND PGND
MBR0540
1µF
WHITE
LEDs
RFB
______________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
1 page  
Nonvolatile, 32-Position Digital Potentiometer
Typical Operating Characteristics (continued)
(VCC = 5.0V; TA = +25°C, unless otherwise noted.)
END-TO-END RESISTANCE PERCENT
CHANGE FROM +25°C vs. TEMPERATURE
5
4
3
2
1 -37.18ppm/°C = tc
0
-1 -148.38ppm/°C = tc
-2
-3
-4
-5
-40 -20
0 20 40 60
TEMPERATURE (°C)
80
10
8
6
4
2
0
-2
-4
-6
-8
-10
0
TEMPERATURE COEFFICIENT
vs. POTENTIOMETER SETTING
25°C TO 85°C
+25°C TO -40°C
5 10 15 20 25 30
POTENTIOMETER SETTING (DEC)
Pin Description
PIN NAME
FUNCTION
1
INC
Increment/Decrement Wiper Control. When INC transitions from high-to-low, the wiper moves in the
direction established by the state of the U/D pin.
Up/Down Control. Sets the directions of wiper movement. When set to a high state, a high-to-low
2 U/D transition on the INC pin increments the wiper. When set to a low state, a high-to-low transition on the
INC pin decrements the wiper.
3 H High-End Terminal of the Potentiometer
4
GND
Ground Terminal
5 W Wiper Terminal of the Potentiometer
6 L Low-End Terminal of the Potentiometer
7
CS
Chip Select. When set to a low state, the wiper position can be adjusted using U/D and INC. When in
a high-state, activity on INC and U/D does not affect or change the wiper position.
8 VCC Power Supply Terminal
_____________________________________________________________________ 5
5 Page | ||
| Páginas | Total 7 Páginas | |
| PDF Descargar | [ Datasheet DS4301.PDF ] | |
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