AD5220BN100 Analog Devices Inc, AD5220BN100 Datasheet

AD5220BN100

Manufacturer Part Number

AD5220BN100

Description

Digital Potentiometer (Pots) IC

Manufacturer

Analog Devices Inc

Datasheet

1.AD5220BN10.pdf (10 pages)

Specifications of AD5220BN100

Potentiometer Ic Case Style

DIP

Peak Reflow Compatible (260 C)

End To End Resistance

100ohm

No. Of Pots

Single

Leaded Process Compatible

No. Of Pins

Mounting Type

Through Hole

Rohs Status

RoHS non-compliant

Taps

128

Resistance (ohms)

100K

Number Of Circuits

Temperature Coefficient

800 ppm/°C Typical

Memory Type

Volatile

Interface

Up/Down Counter

Voltage - Supply

2.7 V ~ 5.5 V

Operating Temperature

-40°C ~ 85°C

Package / Case

8-DIP (0.300", 7.62mm)

Resistance In Ohms

100K

Lead Free Status / RoHS Status

Contains lead / RoHS non-compliant

Current page: 1 of 10
Download datasheet (266Kb)

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

which may result from its use. No license is granted by implication or

otherwise under any patent or patent rights of Analog Devices.

GENERAL DESCRIPTION

The AD5220 provides a single channel, 128-position digitally

controlled variable resistor (VR) device. This device performs

the same electronic adjustment function as a potentiometer or

variable resistor. These products were optimized for instrument

and test equipment push-button applications. A choice between

bandwidth or power dissipation are available as a result of the

wide selection of end-to-end terminal resistance values.

The AD5220 contains a fixed resistor with a wiper contact that

taps the fixed resistor value at a point determined by a digitally

controlled UP/DOWN counter. The resistance between the

wiper and either end point of the fixed resistor provides a con-

stant resistance step size that is equal to the end-to-end resis-

tance divided by the number of positions (e.g., R

128 = 78 ). The variable resistor offers a true adjustable value

of resistance, between the A terminal and the wiper, or the B

terminal and the wiper. The fixed A-to-B terminal resistance of

10 k , 50 k , or 100 k has a nominal temperature coefficient

of 800 ppm/ C.

The chip select CS, count CLK and U/D direction control

inputs set the variable resistor position. These inputs that con-

trol the internal UP/DOWN counter can be easily generated

with mechanical or push button switches (or other contact closure

devices). External debounce circuitry is required for the nega-

tive-edge sensitive CLK pin. This simple digital interface elimi-

nates the need for microcontrollers in front panel interface designs.

The AD5220 is available in both surface mount (SO-8) and the

8-lead plastic DIP package. For ultracompact solutions selected

models are available in the thin SOIC package. All parts are

guaranteed to operate over the extended industrial temperature

range of –40 C to +85 C. For 3-wire, SPI compatible inter-

face applications, see the AD7376/AD8400/AD8402/AD8403

products.

FEATURES

128 Position

Potentiometer Replacement

10 k , 50 k , 100 k

Very Low Power: 40 A Max

Increment/Decrement Count Control

APPLICATIONS

Mechanical Potentiometer Replacement

Remote Incremental Adjustment Applications

Instrumentation: Gain, Offset Adjustment

Programmable Voltage-to-Current Conversion

Programmable Filters, Delays, Time Constants

Line Impedance Matching

Power Supply Adjustment

STEP

= 10 k /

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781/329-4700

Fax: 781/326-8703

Figure 1. Typical Push-Button Control Application

50mV/DIV

5V/DIV

Figure 2a. Stair-Step Increment Output

Figure 2b. Full-Scale Up/Down Count

FUNCTIONAL BLOCK DIAGRAM

CLK

U/D

UPCOUNT DETAIL

f = 100kHz

f = 60kHz

INCREMENT

UP/DOWN

Increment/Decrement

= 5.5V

= 0V

= 5.5V

= 0V

= 5.5V

World Wide Web Site: http://www.analog.com

Digital Potentiometer

POR

DOWN

CNTR

UP/

CLK

= 60kHz

+5V

AD5220

COUNT

v 3F

U/D

CLK

AD5220

v 00

GND

CLK

Related parts for AD5220BN100

AD5220BN100 Summary of contents

Page 1

FEATURES 128 Position Potentiometer Replacement 100 k Very Low Power Max Increment/Decrement Count Control APPLICATIONS Mechanical Potentiometer Replacement Remote Incremental Adjustment Applications Instrumentation: Gain, Offset Adjustment Programmable Voltage-to-Current Conversion Programmable Filters, ...

Page 2

AD5220–SPECIFICATIONS ELECTRICAL CHARACTERISTICS Parameter DC CHARACTERISTICS RHEOSTAT MODE Specifications Apply to All VRs 2 Resistor Differential NL 2 Resistor Nonlinearity Nominal Resistor Tolerance Resistance Temperature Coefficient Wiper Resistance DC CHARACTERISTICS POTENTIOMETER DIVIDER MODE Specifications Apply to All VRs Resolution 3 ...

Page 3

... C to +85 C AD5220BRM10 10 – +85 C AD5220BN50 50 – +85 C AD5220BR50 50 – +85 C AD5220BRM50 50 – +85 C AD5220BN100 100 – +85 C AD5220BR100 100 – +85 C AD5220BRM100 100 – +85 C NOTE The AD5220 die size is 37 mil 54 mil, 1998 sq mil; 0.938 mm 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 ...

Page 4

Performance Characteristics AD5220 100 128 CODE – Decimal Figure 4. Wiper to End Terminal Resistance vs. Code +5.5V ...

Page 5

C < T < + +5. 10k VERSION 32 25 50k AND 100k VERSION –3 – 112 128 CODE – ...

Page 6

AD5220 + p + CODE = 10pF 4V 10k 100k 1M FREQUENCY ...

Page 7

DUT 1LSB = V+/128 Figure 27. Potentiometer Divider Nonlinearity Error Test Circuit (INL, DNL) NO CONNECT DUT Figure 28. Resistor Position Nonlinearity Error (Rheostat Operation; R-INL, R-DNL) = ...

Page 8

AD5220 OPERATION The AD5220 provides a 128-position digitally controlled vari- able resistor (VR) device. Changing the VR settings is accom- plished by pulsing the CLK pin while CS is active low. The direction of the increment is controlled by the ...

Page 9

PROGRAMMING THE POTENTIOMETER DIVIDER Voltage Output Operation The digital potentiometer easily generates an output voltage proportional to the input voltage applied to a given terminal. For example connecting A Terminal and B Terminal to ground produces an ...

Page 10

AD5220 OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 8-Lead Plastic DIP (N-8) 0.430 (10.92) 0.348 (8.84 0.280 (7.11) 0.240 (6.10 0.325 (8.25) 0.300 (7.62) 0.060 (1.52) PIN 1 0.015 (0.38) 0.210 (5.33) MAX 0.130 (3.30) ...

Related keywords

AD5220BN100 datasheet
AD5220BN100 data sheet
AD5220BN100 pdf datasheet
AD5220BN100 component
AD5220BN100 part
AD5220BN100 distributor
AD5220BN100 RoHS
AD5220BN100 datasheet download