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Analog Devices Semiconductor Electronic Components Datasheet

AD5227 Datasheet

64-Position Up/Down Control Digital Potentiometer

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AD5227 pdf
FEATURES
64-position digital potentiometer
10 kΩ, 50 kΩ, 100 kΩ end-to-end terminal resistance
Simple up/down digital or manual configurable control
Midscale preset
Low potentiometer mode tempco = 10 ppm/°C
Low rheostat mode tempco = 35 ppm/°C
Ultralow power, IDD = 0.4 μA typ and 3 μA max
Fast adjustment time, ts = 1 μs
Chip select enable multiple device operation
Low operating voltage, 2.7 V to 5.5 V
Automotive temperature range, −40°C to +105°C
Compact thin SOT-23-8 (2.9 mm × 3 mm) Pb-free package
APPLICATIONS
Mechanical potentiometer and trimmer replacements
LCD backlight, contrast, and brightness controls
Portable electronics level adjustment
Programmable power supply
Digital trimmer replacements
Automatic closed-loop control
GENERAL DESCRIPTION
The AD5227 is Analog Devices’ latest 64-step up/down control
digital potentiometer1. This device performs the same electronic
adjustment function as a 5 V potentiometer or variable resistor.
Its simple 3-wire up/down interface allows manual switching or
high speed digital control. The AD5227 presets to midscale at
power-up. When CS is enabled, the devices changes step at
every clock pulse. The direction is determined by the state of
the U/D pin (see Table 1). The interface is simple to activate by
any host controller, discrete logic, or manually with a rotary
encoder or pushbuttons. The AD5227’s 64-step resolution, small
footprint, and simple interface enable it to replace mechanical
potentiometers and trimmers with typically 6× improved
resolution, solid-state reliability, and design layout flexibility,
resulting in a considerable cost savings in end users’ systems.
64-Position Up/Down
Control Digital Potentiometer
AD5227
FUNCTIONAL BLOCK DIAGRAM
VDD
AD5227
CS
U/D
CLK
6-BIT UP/DOWN
CONTROL
LOGIC
A
W
B
GND
POR
MIDSCALE
WIPER
REGISTER
Figure 1.
The AD5227 is available in a compact thin SOT-23-8 (TSOT-8)
Pb-free package. The part is guaranteed to operate over the
automotive temperature range of −40°C to +105°C.
Users who consider EEMEM potentiometers should refer to
some recommendations in the Applications section.
Table 1. Truth Table
CS CLK
0
0
U/D
0
1
1X
X
Operation1
RWB Decrement
RWB Increment
No Operation
1 RWA increments if RWB decrements and vice versa.
1 The terms digital potentiometer and RDAC are used interchangeably.
Rev. B
Information furnished by Analog Devices is believed to be accurate and reliable.
However, no responsibility is assumed by Analog Devices for its use, nor for any
infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
or otherwise under any patent or patent rights of Analog Devices. Trademarks and
registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703© 2004–2009 Analog Devices, Inc. All rights reserved.


Analog Devices Semiconductor Electronic Components Datasheet

AD5227 Datasheet

64-Position Up/Down Control Digital Potentiometer

No Preview Available !

AD5227 pdf
AD5227* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
View a parametric search of comparable parts.
EVALUATION KITS
AD5227 Evaluation Board
DOCUMENTATION
Application Notes
AN-1291: Digital Potentiometers: Frequently Asked
Questions
AN-686: Implementing an I2C® Reset
AN-711: ADN2847 AC-Coupled Optical Evaluation Kit
Data Sheet
AD5227: 64-Position Up/Down Control Digital
Potentiometer Data Sheet
DESIGN RESOURCES
AD5227 Material Declaration
PCN-PDN Information
Quality And Reliability
Symbols and Footprints
DISCUSSIONS
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SAMPLE AND BUY
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TECHNICAL SUPPORT
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number.
DOCUMENT FEEDBACK
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This page is dynamically generated by Analog Devices, Inc., and inserted into this data sheet. A dynamic change to the content on this page will not
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Part Number AD5227
Description 64-Position Up/Down Control Digital Potentiometer
Maker Analog Devices
Total Page 17 Pages
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