Datasheet > AD5228BUJ100-R7

AD5228BUJ100-R7

更新时间： 2024-10-28 20:10:35

品牌	Logo	应用领域
亚德诺 - ADI		光电二极管转换器电阻器
页数	文件大小	规格书
20页	337K
描述
IC 100K DIGITAL POTENTIOMETER, PUSH-BUTTON CONTROL INTERFACE, 32 POSITIONS, PDSO8, 2.9 x 3 MM, SOT-23, 8 PIN, Digital Potentiometer

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AD5228BUJ100-R7 数据手册

32-Position Manual Up/Down Control

Potentiometer

AD5228

FUNCTIONAL BLOCK DIAGRAM

FEATURES

32-position digital potentiometer

10 kΩ, 50 kΩ, 100 kΩ end-to-end terminal resistance

Simple manual up/down control

Self-contained, requires only 2 pushbutton tactile switches

Built-in adaptive debouncer

Discrete step-up/step-down control

AD5228

UP/DOWN

CONTROL

LOGIC

R1 R2

DISCRETE

STEP/AUTO

SCAN DETECT

Autoscan up/down control with 4 steps per second

Pin-selectable zero-scale/midscale preset

Low potentiometer mode tempco, 5 ppm/°C

Low rheostat mode tempco, 35 ppm/°C

Digital control compatible

PUSH-UP

BUTTON

ADAPTIVE

DEBOUNCER

ZERO- OR MID-

SCALE PRESET

PUSH-DOWN

BUTTON

PRE

GND

Ultralow power, I_DD= 0.4 μA typ and 3 μA max

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

Figure 1.

The AD5228 can increment or decrement the resistance in

discrete steps or in autoscan mode. When the or button

PU PD

is pressed briefly (no longer than 0.6 s), the resistance of the

AD5228 changes by one step. When the or button is

APPLICATIONS

Mechanical potentiometer and trimmer replacements

LCD backlight, contrast, and brightness controls

Digital volume control

Portable device-level adjustments

Electronic front panel-level controls

Programmable power supply

PU PD

held continuously for more than a second, the device activates

the autoscan mode and changes four resistance steps per

second.

The AD5228 can also be controlled digitally; its up/down

features simplify microcontroller usage. The AD5228 is available

in a compact thin SOT-23-8 (TSOT-8) package. The part is

guaranteed to operate over the automotive temperature range of

−40°C to +105°C.

GENERAL DESCRIPTION

The AD5228 is Analog Devices’ latest 32-step-up/step-down

control digital potentiometer emulating mechanical potenti-

ometer operation¹. Its simple up/down control interface allows

manual control with just two external pushbutton tactile

switches. The AD5228 is designed with a built-in adaptive

debouncer that ignores invalid bounces due to contact bounce

commonly found in mechanical switches. The debouncer is

adaptive, accommodating a variety of pushbutton tactile

switches that generally have less than 10 ms of bounce time

during contact closures. When choosing the switch, the user

should consult the timing specification of the switch to ensure

its suitability in an AD5228 application.

The AD5228’s simple interface, small footprint, and very low

cost enable it to replace mechanical potentiometers and

trimmers with typically 3× improved resolution, solid-state

reliability, and faster adjustment, resulting in considerable cost

saving in end users’ systems.

Users who consider EEMEM potentiometers should refer to the

recommendations in the Applications section.

Table 1. Truth Table

Operation¹

R_WBDecrement

R_WBIncrement

R_WBDecrement

R_WBDoes Not Change

¹R_WAincrements if R_WBdecrements and vice versa.

¹The terms digital potentiometer and RDAC are used interchangeably.

Rev. A

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

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与AD5228BUJ100-R7相关器件

型号	品牌	获取价格	描述	数据表
AD5228BUJZ1002-R2	ADI	获取价格	32-Position Manual Up/Down Control Potentiometer
AD5228BUJZ1002-RL7	ADI	获取价格	32-Position Manual Up/Down Control Potentiometer
AD5228BUJZ100-R2	ADI	获取价格	32-Position Manual Up/Down Control Potentiometer
AD5228BUJZ100-RL7	ADI	获取价格	32-Position Manual Up/Down Control Potentiometer
AD5228BUJZ102-R2	ADI	获取价格	32-Position Manual Up/Down Control Potentiometer
AD5228BUJZ102-RL7	ADI	获取价格	32-Position Manual Up/Down Control Potentiometer
AD5228BUJZ10-R2	ADI	获取价格	32-Position Manual Up/Down Control Potentiometer
AD5228BUJZ10-RL7	ADI	获取价格	32-Position Manual Up/Down Control Potentiometer
AD5228BUJZ50	ADI	获取价格	32-Position Manual Up/Down Control Potentiometer
AD5228BUJZ502-R2	ADI	获取价格	32-Position Manual Up/Down Control Potentiometer

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