AD5282BRUZ20-REEL7 Analog Devices Inc, AD5282BRUZ20-REEL7 Datasheet

AD5282BRUZ20-REEL7

Manufacturer Part Number

AD5282BRUZ20-REEL7

Description

IC,Digital Potentiometer,TSSOP,16PIN,PLASTIC

Manufacturer

Analog Devices Inc

Datasheet

1.AD5280BRUZ50.pdf (28 pages)

Specifications of AD5282BRUZ20-REEL7

Taps

256

Resistance (ohms)

20K

Number Of Circuits

Temperature Coefficient

30 ppm/°C Typical

Memory Type

Volatile

Interface

I²C, 2-Wire Serial

Voltage - Supply

4.5 V ~ 16.5 V, ±4.5 V ~ 5.5 V

Operating Temperature

-40°C ~ 85°C

Mounting Type

Surface Mount

Package / Case

16-TSSOP

Resistance In Ohms

20K

Number Of Elements

# Of Taps

256

Resistance (max)

20KOhm

Power Supply Requirement

Single/Dual

Interface Type

Serial (2-Wire/I2C)

Single Supply Voltage (typ)

15V

Dual Supply Voltage (typ)

±5V

Single Supply Voltage (min)

4.5V

Single Supply Voltage (max)

16.5V

Dual Supply Voltage (min)

±4.5V

Dual Supply Voltage (max)

±5.5V

Operating Temp Range

-40C to 85C

Operating Temperature Classification

Industrial

Mounting

Surface Mount

Pin Count

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

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FEATURES

AD5280: 1 channel

AD5282: 2 channels

256 positions

+10 V to +15 V single supply; ±5.5 V dual-supply operation

Fixed terminal resistance: 20 kΩ, 50 kΩ, 200 kΩ

Low temperature coefficient: 30 ppm/°C

Power-on midscale preset

Programmable reset

Operating temperature: −40

APPLICATIONS

Multimedia, video, and audio

Communications

Mechanical potentiometer replacement

Instrumentation: gain, offset adjustment

Programmable voltage source

Programmable current source

Line impedance matching

GENERAL DESCRIPTION

The AD5280/AD5282 are single-channel and dual-channel,

256-position, digitally controlled variable resistors (VRs)

The devices perform the same electronic adjustment function

as a potentiometer, trimmer, or variable resistor. Each VR offers

a completely programmable 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 20 kΩ, 50 kΩ, or 200 kΩ has

a 1% channel-to-channel matching tolerance. The nominal

temperature coefficient of both parts is 30 parts per million/

degrees centigrade (ppm/°C). Another key feature is that the

parts can operate up to +15 V or ±5 V.

Wiper position programming defaults to midscale at system

power-on. When powered, the VR wiper position is programmed

by an I

AD5282 feature sleep mode programmability. This allows any

level of preset in power-up and is an alternative to a costly

EEPROM solution. Both parts have additional programmable

Rev. C

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.

Assert shutdown and program the device during power-up, then deassert

the shutdown to achieve the desired preset level.

The terms digital potentiometer, VR, and RDAC are used interchangeably.

C-compatible interface

C-compatible, 2-wire serial data interface. The AD5280/

C to +85

Single/Dual, +15 V/±5 V, 256-Position,

C-Compatible Digital Potentiometer

One Te

Tel: 781.329.4700

Fax: 781.461.3113

logic outputs that enable users to drive digital loads, logic gates,

LED drivers, and analog switches in their system.

The AD5280/AD5282 are available in thin, surface-mounted

14-lead TSSOP and 16-lead TSSOP. All parts are guaranteed to

operate over the extended industrial temperature range of

−40°C to +85°C. For 3-wire SPI-compatible interface applica-

tions, see the

www.analog.com.

SHDN

GND

SDA

SCL

chnology Way, P.O. Box 9106, Norwood, MA 02062-9106,

SHDN

GND

SDA

SCL

ADDRESS

FUNCTIONAL BLOCK DIAGRAMS

CODE

AD0

AD5260/AD5262

RDAC1 REGISTER

ADDRESS

CODE

AD0

RDAC REGISTER

SERIAL INPUT REGISTER

AD1

SERIAL INPUT REGISTER

Figure 1. AD5280

Figure 2. AD5282

AD1

AD5280/AD5282

product information on

RDAC2 REGISTER

OUTPUT REGISTER

PWR ON

RESET

PWR ON

RESET

AD5280

www.analog.com

OUTPUT

AD5282

U.S.A.

Related parts for AD5282BRUZ20-REEL7

AD5282BRUZ20-REEL7 Summary of contents

Page 1

FEATURES AD5280: 1 channel AD5282: 2 channels 256 positions + +15 V single supply; ±5.5 V dual-supply operation Fixed terminal resistance: 20 kΩ, 50 kΩ, 200 kΩ Low temperature coefficient: 30 ppm/°C 1 Power-on midscale preset Programmable reset ...

Page 2

AD5280/AD5282 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagrams ............................................................. 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Electrical Characteristics ............................................................. 3 Absolute Maximum Ratings ............................................................ 5 Thermal Resistance ...................................................................... 5 ESD ...

Page 3

SPECIFICATIONS ELECTRICAL CHARACTERISTICS Table 1. Parameter Symbol DC CHARACTERISTICS–RHEOSTAT MODE 2 Resistor Differential NL R-DNL Resistor Nonlinearity 2 R-INL 3 Nominal Resistor Tolerance ...

Page 4

AD5280/AD5282 Parameter Symbol Total Harmonic Distortion THD V Settling Time Crosstalk CT Analog Crosstalk CTA Resistor Noise Voltage e N_WB INTERFACE TIMING CHARACTERISTICS (applies to all parts) SCL Clock Frequency f SCL t Bus Free Time Between ...

Page 5

ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 2. Parameter V to GND GND GND ...

Page 6

AD5280/AD5282 PIN CONFIGURATIONS AND FUNCTION DESCRIPTIONS AD5280 B TOP VIEW SHDN 5 6 SCL 7 SDA Figure 4. AD5280 Pin Configuration Table 4. AD5280 Pin Function Descriptions Pin No. Mnemonic Description 1 ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS 1.0 0.8 0.6 +5V 0.4 0.2 0 –0.2 ±5V –0.4 +15V –0.6 –0.8 –1 128 CODE (Decimal) Figure 6. R-INL vs. Code vs. Supply Voltages 0.5 0.4 0.3 ±5V +15V 0.2 0.1 0 ...

Page 8

AD5280/AD5282 1.0 AVG +3σ 0.5 AVG AVG –3σ 0 –0.5 –1 – ( Figure 12. INL Over Supply Voltage 2.0 1.5 AVG +3σ 1.0 AVG 0.5 AVG –3σ 0 –0.5 –1.0 –1.5 ...

Page 9

LOGIC 100 5V/ LOGIC (V) IH Figure 18. V Supply Current vs. Digital Input Voltage LOGIC 700 600 500 400 300 20kΩ ...

Page 10

AD5280/AD5282 0 –6 – 50kΩ –18 150kHz – 200kΩ –30 35kHz –36 –42 –48 –54 –60 0 10k FREQUENCY (Hz) Figure 24. −3 dB Bandwidth –6dB R = 200kΩ 100 1k FREQUENCY (Hz) Figure 25. Normalized ...

Page 11

A2 1.0V 33.41µs 1.50µs Figure 30. Digital Feedthrough vs. Time 100 25° 1 20kΩ 50kΩ 200kΩ 128 ...

Page 12

AD5280/AD5282 TEST CIRCUITS Figure 33 to Figure 43 define the test conditions used in the product specification table. DUT 1LSB = V+/ Figure 33. Potentiometer Divider Nonlinearity Error (INL, DNL) NO CONNECT ...

Page 13

CONNECT DUT B V GND Figure 41. Common-Mode Leakage Current V I LOGIC LOGIC SCL SCA DIGITAL INPUT VOLTAGE Figure 42. V Current vs. Digital Input ...

Page 14

AD5280/AD5282 THEORY OF OPERATION The AD5280/AD5282 are single-channel and dual-channel, 256-position, digitally controlled variable resistors (VRs). To program the VR settings, see the Digital Interface section. Both parts have an internal power-on preset that places the wiper at midscale during ...

Page 15

Terminal A and Terminal B is 256 − 256 256 For a more accurate calculation that includes the effect of wiper resistance, V ...

Page 16

AD5280/AD5282 DIGITAL INTERFACE 2-WIRE SERIAL BUS The AD5280/AD5282 are controlled via an I bus. The RDACs are connected to this bus as slave devices. As shown in Figure 45, Figure 46, and Table 6, the first byte of the AD5280/AD5282 ...

Page 17

READBACK RDAC VALUE The AD5280/AD5282 allow the user to read back the RDAC values in read mode. However, for the dual-channel AD5282, the channel of interest is the one that is previously selected in the write mode. When users need ...

Page 18

AD5280/AD5282 LEVEL SHIFT FOR BIDIRECTIONAL INTERFACE While most old systems can be operated at one voltage, a new component can be optimized at another. When two systems operate the same signal at two different voltages, proper level shifting is needed. ...

Page 19

LAYOUT AND POWER SUPPLY BYPASSING good practice to design a layout with compact, minimum lead lengths. The leads to the input should be as direct as possible with a minimum conductor length. Ground paths should have low ...

Page 20

AD5280/AD5282 APPLICATIONS INFORMATION BIPOLAR OPERATION FROM DUAL SUPPLIES The AD5280/AD5282 can be operated from dual supplies enabling control of ground-referenced ac signals or bipolar operation. The ac signal, as high directly across Terminal A ...

Page 21

BIPOLAR DAC OUT +5V +15V REF TRIM GND – ADR425 OP2177 + A 1 –15V Figure 58. 8-Bit Bipolar DAC Figure 58 shows a low ...

Page 22

AD5280/AD5282 PROGRAMMABLE CURRENT SOURCE + (2.048 + SLEEP OUT B REF191 C1 1µF GND A 4 +5V AD5280 V+ OP8510 OP8510 U2 U2 –2.048V ...

Page 23

PROGRAMMABLE LOW-PASS FILTER In analog-to-digital conversion applications common to include an antialiasing filter to band-limit the sampling signal. Dual-channel digital potentiometers can be used to construct a second-order Sallen key low-pass filter (see Figure 63). The design equations ...

Page 24

AD5280/AD5282 RDAC CIRCUIT SIMULATION MODEL The internal parasitic capacitances and the external capacitive loads dominate the ac characteristics of the RDACs. Configured as a potentiometer divider, the −3 dB bandwidth of the AD5280 (20 kΩ resistor) measures 310 kHz at ...

Page 25

OUTLINE DIMENSIONS 4.50 4.40 4.30 PIN 1 1.05 1.00 0.80 0.15 0.05 COPLANARITY 0.10 0.15 0.05 5.10 5.00 4. 6.40 BSC 1 7 0.65 BSC 1.20 0.20 MAX 0.09 8° SEATING 0° 0.30 PLANE 0.19 COMPLIANT TO JEDEC ...

Page 26

... AD5280BRUZ200- AD5282BRU20 2 AD5282BRU20-REEL7 2 AD5282BRU50 2 AD5282BRU50-REEL7 2 AD5282BRU200 2 AD5282BRU200-REEL7 2 2 AD5282BRUZ20 2 2 AD5282BRUZ20-REEL7 2 2 AD5282BRUZ50 2 2 AD5282BRUZ50-REEL7 2 2 AD5282BRUZ200 2 2 AD5282BRUZ200-R7 2 AD5282-EVAL 2 1 Line 1 contains model number, Line 2 contains ADI logo followed by the end-to-end resistance value, and Line 3 contains date code YYWW RoHS Compliant Part. ...

Page 27

NOTES Rev Page AD5280/AD5282 ...

Page 28

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