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| 型號(hào)： | AD5227BUJZ50-RL72 |
| 廠(chǎng)商： | Analog Devices, Inc. |
| 元件分類(lèi)： | 數(shù)字電位計(jì) |
| 英文描述： | 64-Position Up/Down Control Digital Potentiometer |
| 中文描述： | 64工位上/下控制數(shù)字電位器 |
| 文件頁(yè)數(shù)： | 1/16頁(yè) |
| 文件大?。?/td> | 331K |
| 代理商： | AD5227BUJZ50-RL72 |
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64-Position Up/Down
Control Digital Potentiometer
AD5227
FEATURES
64-position digital potentiometer
10 k, 50 k, 100 k 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, I
DD
= 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
Rev.
0
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
Fax: 781.326.8703
2004 Analog Devices, Inc. All rights reserved.
www.analog.com
FUNCTIONAL BLOCK DIAGRAM
0
CS
U/D
CLK
GND
V
DD
6-BIT UP/DOWN
CONTROL
LOGIC
POR
MIDSCALE
WIPER
REGISTER
A
W
B
AD5227
Figure 1.
The AD5227 is Analog Devices’ latest 64-step up/down control
digital potentiometer
1
. 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
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.
1
The terms
digital potentiometer
and
RDAC
are used interchangeably.
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
U/D
0
↓
0
0
↓
1
1
X
X
Operation
1
R
WB
Decrement
R
WB
Increment
No Operation
1
R
WA
increments if R
WB
decrements and vice versa.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD5227EVAL | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:64-Position Up/Down Control Digital Potentiometer |
| AD5228 | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:32-Position Manual Up/Down Control Potentiometer |
| AD5228BUJZ10 | 制造商:Analog Devices 功能描述:DGTL POTENTIOMETER 32POS 10KOHM SGL 8PIN TSOT - Bulk |
| AD5228BUJZ100 | 制造商:Analog Devices 功能描述:DGTL POTENTIOMETER 32POS 100KOHM SGL 8PIN TSOT - Bulk |
| AD5228BUJZ1002-R2 | 制造商:AD 制造商全稱(chēng):Analog Devices 功能描述:32-Position Manual Up/Down Control Potentiometer |
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