EVAL-AD5290EBZ

Manufacturer Part NumberEVAL-AD5290EBZ
DescriptionEval Board For AD5290
ManufacturerAnalog Devices Inc
EVAL-AD5290EBZ datasheet
 


Specifications of EVAL-AD5290EBZ

Main PurposeDigital PotentiometerUtilized Ic / PartAD5290
Lead Free Status / RoHS StatusLead free / RoHS CompliantSecondary Attributes-
Embedded-Primary Attributes-
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FEATURES
256 position
10 kΩ, 50 kΩ, 100 kΩ
+20 V to +30 V single-supply operation
±10 V to ±15 V dual-supply operation
3-wire SPI®-compatible serial interface
Low temperature coefficient 35 ppm/
THD 0.006% typical
Midscale preset
Compact MSOP-10 package
o
Automotive temperature range: −40
C to +125
process technology
1
iCMOS™
APPLICATIONS
High voltage DAC
Programmable power supply
Programmable gain and offset adjustment
Programmable filters and delays
Actuator control
Audio volume control
Mechanical potentiometer replacement
GENERAL DESCRIPTION
The AD5290 is one of the few high voltage, high performance,
2, 3
and compact digital potentiometers
in the market at present.
This device can be used as a programmable resistor or resistor
divider. The AD5290 performs the same electronic adjustment
function as mechanical potentiometers, variable resistors, and
trimmers, with enhanced resolution, solid-state reliability, and
superior temperature stability.
1
iCMOS™ Process Technology. For analog systems designers who need high performance ICs at higher voltage levels, iCMOS is a technology platform that enables the
development of analog ICs capable of 30 V and operating at ±15 V supplies while allowing dramatic reductions in power consumption and package size, and
increased ac and dc performance.
2
The terms digital potentiometer and RDAC are used interchangeably.
3
The RDAC segmentation is protected by U.S. Patent Number 5,495,245.
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.
Compact +30 V / ±15 V 256-Position
SDO
o
C typical
SDI
CLK
o
C
CS
With digital rather than manual control, the AD5290 provides
layout flexibility and allows closed-loop dynamic controllability.
The AD5290 is available in MSOP-10 package and has 10 kΩ,
50 kΩ, and 100 kΩ options. All parts are guaranteed to operate
over the –40°C to +125°C extended automotive temperature range.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
Digital Potentiometer
AD5290
FUNCTIONAL BLOCK DIAGRAM
AD5290
Q
8-BIT
8
8
8-BIT
SERIAL
LATCH
REGISTER
D
CK
RS
POR
DGND
Figure 1.
www.analog.com
©2005-2010 Analog Devices, Inc. All rights reserved.
V
DD
A
W
B
V
SS

EVAL-AD5290EBZ Summary of contents

  • Page 1

    FEATURES 256 position 10 kΩ, 50 kΩ, 100 kΩ + +30 V single-supply operation ± ±15 V dual-supply operation 3-wire SPI®-compatible serial interface Low temperature coefficient 35 ppm/ THD 0.006% typical Midscale preset Compact MSOP-10 package ...

  • Page 2

    AD5290 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 Functional Block Diagram .............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications ..................................................................................... 3 Electrical Characteristics—10 kΩ Version ................................ 3 Electrical Characteristics—50 kΩ, 100 kΩ Versions ............... 5 ...

  • Page 3

    SPECIFICATIONS ELECTRICAL CHARACTERISTICS—10 kΩ VERSION ±15 V ± 10 Table 1. Parameter DC CHARACTERISTICS RHEOSTAT MODE 2 Resistor Differential NL 2 Resistor Nonlinearity Nominal Resistor ...

  • Page 4

    AD5290 Parameter DYNAMIC CHARACTERISTICS Bandwidth −3 dB Total Harmonic Distortion V Settling Time W Resistor Noise Voltage 1 Typical represents average reading at +25° Resistor position nonlinearity error R-INL is the deviation from an ideal ...

  • Page 5

    ELECTRICAL CHARACTERISTICS—50 KΩ, 100 KΩ VERSIONS ±15 V ± 10 Table 2. Parameter DC CHARACTERISTICS RHEOSTAT MODE 2 Resistor Differential NL 2 Resistor Nonlinearity Nominal Resistor Tolerance ...

  • Page 6

    AD5290 Parameter DYNAMIC CHARACTERISTICS Bandwidth −3 dB Total Harmonic Distortion V Settling Time W Resistor Noise Voltage 1 Typical represents average reading at +25°C, VDD = +15 V, and VSS = − Resistor position nonlinearity ...

  • Page 7

    INTERFACE TIMING CHARACTERISTICS Table Parameter Clock Frequency Input Clock Pulse Width Data Setup Time Data Hold Time 3 CLK to SDO Propagation Delay CS Setup Time CS High Pulse Width CLK Fall to CS Fall Hold Time ...

  • Page 8

    AD5290 3-WIRE DIGITAL INTERFACE Data is loaded MSB first. Table 4. AD5290 Serial Data-Word Format MSB SDI CLK 0 ...

  • Page 9

    ABSOLUTE MAXIMUM RATINGS T = +25°C, unless otherwise noted. A Table 5. Parameter V to GND GND GND Maximum Current I , ...

  • Page 10

    AD5290 PIN CONFIGURATION AND DESCRIPTIONS Table 6. AD5290 Pin Function Descriptions Pin No. Mnemonic Description Terminal Terminal Negative Supply. Connect for single-supply applications GND Digital ...

  • Page 11

    TYPICAL PERFORMANCE CHARACTERISTICS 1 16.5V DD 0.8 –40°C 0.6 +25°C +125°C 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1 128 CODE (Decimal) Figure 5. Resistance Step Position Nonlinearity Error vs. Code 1 ...

  • Page 12

    AD5290 100 80 10k 50k 60 100k –20 –40 –60 –80 –100 128 CODE (Decimal) Figure 11. (ΔR /R )/ΔT Rheostat Mode Tempco WB WB 100 80 10k 60 50k 100k 40 20 ...

  • Page 13

    V CODE = –40 = ± 15V DC ± 10% p-p AC +PSRR @ –20 = ± 15V DC ± 10% p-p AC –PSRR @ ...

  • Page 14

    AD5290 1000 100 = ±16. DIGITAL INPUT VOLTAGE V Figure 23. Supply Current vs. Digital Input Voltage Figure 24. Digital Feedthrough (V) IH Rev Page 14 of ...

  • Page 15

    THEORY OF OPERATION PROGRAMMING THE VARIABLE RESISTOR Rheostat Operation The part operates in the rheostat mode when only two termi- nals are used as a variable resistor. The unused terminal can be floating or tied to the W terminal as ...

  • Page 16

    AD5290 PROGRAMMING THE POTENTIOMETER DIVIDER Voltage Output Operation The digital potentiometer easily generates a voltage divider at wiper to B and wiper to A proportional to the input voltage Unlike the polarity GND, ...

  • Page 17

    ESD PROTECTION All digital inputs are protected with a series input resistor and a Zener ESD structure, as shown in Figure 30. These structures apply to digital input pins, Pin CS , Pin CLK, Pin SDI, and Pin SDO. 340 ...

  • Page 18

    AD5290 APPLICATIONS HIGH VOLTAGE DAC AD5290 can be configured as a high voltage DAC, with out- put voltage as high The circuit is shown in Figure 33. The output × × ...

  • Page 19

    1μF R1 100kΩ R2 200Ω R4 90kΩ R5 10kΩ AD8541 100kΩ V– Figure 35. Audio Volume Control with Zipper Noise Reduction 1 2 CHANNEL 1 FREQ = 20.25kHz 1.03V p-p Figure 36. ...

  • Page 20

    ... ORDERING GUIDE 1 Model R (kΩ) AB AD5290YRMZ10 10 AD5290YRMZ10-R7 10 AD5290YRMZ50 50 AD5290YRMZ50-R7 50 AD5290YRMZ100 100 AD5290YRMZ100-R7 100 EVAL-AD5290EBZ RoHS Compliant Part. ©2005-2010 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. 3.10 3.00 2.90 5. 3.10 4.90 3.00 4.65 1 2.90 ...