EVAL-AD5246DBZ Analog Devices, EVAL-AD5246DBZ Datasheet

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EVAL-AD5246DBZ

Manufacturer Part Number
EVAL-AD5246DBZ
Description
Digital Potentiometer Development Tools EVALUATION BOARD I.C.
Manufacturer
Analog Devices
Series
AD5246r
Datasheet

Specifications of EVAL-AD5246DBZ

Rohs
yes
Product
Evaluation Boards
Tool Is For Evaluation Of
AD5246
Resistance
5 kOhms/10 kOhms/50 kOhms/100 kOhms
Operating Supply Voltage
5.5 V
Interface Type
I2C
Maximum Operating Temperature
+ 125 C
Factory Pack Quantity
1
For Use With
Sim DAC Web Tool
Data Sheet
FEATURES
128-position
End-to-end resistance 5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
Ultracompact SC70-6 (2 mm × 2.1 mm) package
I
Full read/write of wiper register
Power-on preset to midscale
Single supply 2.7 V to 5.5 V
Rheostat mode temperature coefficient: 45 ppm/°C
Low power, I
Wide operating temperature –40°C to +125°C
APPLICATIONS
Mechanical potentiometer replacement in new designs
Transducer adjustment of pressure, temperature, position,
RF amplifier biasing
Automotive electronics adjustment
Gain control and offset adjustment
GENERAL OVERVIEW
The AD5246 provides a compact 2 mm × 2.1 mm packaged
solution for 128-position adjustment applications. This device
performs the same electronic adjustment function as a variable
resistor. Available in four different end-to-end resistance values
(5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ), these low temperature coefficient
devices are ideal for high accuracy and stability variable
resistance adjustments.
The wiper settings are controllable through the I
digital interface, which can also be used to read back the present
wiper register control word. The resistance between the wiper
and either end point of the fixed resistor varies linearly with
respect to the digital code transferred into the RDAC
Operating from a 2.7 V to 5.5 V power supply and consuming
0.9 µA (3.3 V) allows for usage in portable battery-operated
applications.
1
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.
2
The terms digital potentiometer, VR, and RDAC are used interchangeably
in this document.
C® compatible interface
chemical, and optical sensors
DD
= 0.9 µA at 3.3 V typical
2
C compatible
1
latch.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113© 2003–2012 Analog Devices, Inc. All rights reserved.
128-Position I
SDA
SCL
FUNCTIONAL BLOCK DIAGRAM
I
2
C INTERFACE
REGISTER
WIPER
GND
Figure 1.
V
DD
Digital Resistor
2
C-Compatible
A
www.analog.com
AD5246
W
B

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EVAL-AD5246DBZ Summary of contents

Page 1

... 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 ...

Page 2

... Changes to Features and General Description Sections .............. 1 Changes to I Parameters, Table 1 ................................................ 3 DD Changes to I Parameters, Table 2 ................................................ 4 DD Changes to Figure 10 ........................................................................ 9 Removed Evaluation Board Section ............................................. 15 Changes to Ordering Guide .......................................................... 16 8/09—Rev Rev. B Changes to Power Supply Sensitivity Parameter .......................... 3 Updated Outline Dimensions ........................................................ 16 Changes to Ordering Guide ........................................................... 16 7/05—Rev Rev. A Changes to Table 1 ............................................................................ 3 Changes to Table 2 ...

Page 3

Data Sheet SPECIFICATIONS ELECTRICAL CHARACTERISTICS—5 kΩ VERSION ± 10 ± 10 Table 1. Parameter DC CHARACTERISTICS—RHEOSTAT MODE Resistor Differential Nonlinearity 2 Resistor Integral Nonlinearity 2 Nominal Resistor Tolerance ...

Page 4

AD5246 ELECTRICAL CHARACTERISTICS—10 kΩ, 50 kΩ, 100 kΩ VERSIONS ± 10 ± 10 Table 2. Parameter DC CHARACTERISTICS, RHEOSTAT MODE Resistor Differential Nonlinearity 2 Resistor Integral Nonlinearity ...

Page 5

Data Sheet TIMING CHARACTERISTICS ± 10 ± 10 Table 3. Parameter INTERFACE TIMING CHARACTERISTICS SCL Clock Frequency t Bus Free Time Between STOP and ...

Page 6

AD5246 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 4. Parameter V to GND GND A W Terminal Current, A–B, A–W, B–W Pulsed 1 Continuous Digital Inputs and Output Voltage to GND ...

Page 7

Data Sheet PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic GND 3 SCL 4 SDA AD5246 GND W 2 TOP VIEW 5 ...

Page 8

AD5246 TYPICAL PERFORMANCE CHARACTERISTICS 1.0 0.8 0 2.7V DD 0.4 0 5.5V DD –0.2 –0.4 –0.6 –0.8 –1 CODE (Decimal) Figure 3. R-INL vs. Code vs. Supply Voltages 0.5 ...

Page 9

Data Sheet 100 DIGITAL INPUTS = 0V CODE = 0x40 10 1 0.1 0.01 –40 –25 – TEMPERATURE (° Figure 9. Supply Current vs. Temperature 100 5V 2. ...

Page 10

AD5246 0 –6 –12 –18 100kΩ –24 –30 –36 –42 –48 –54 –60 1k 10k 100k FREQUENCY (Hz) Figure 15. –3 dB Bandwidth @ Code = 0x80 0. 5.5V DD CODE = 0x55 0. ...

Page 11

Data Sheet TEST CIRCUITS Figure 21 Figure 25 to define the test conditions used in the product Specification tables. DUT Figure 21. Test Circuit for Resistor Position Nonlinearity Error (Rheostat Operation; R-INL, R-DNL ...

Page 12

AD5246 I C INTERFACE 2 Table 6. Write Mode Slave Address Byte Table 7. Read Mode Slave Address Byte S = Start Condition Stop Condition. A ...

Page 13

Data Sheet OPERATION The AD5246 is a 128-position, digitally controlled variable resistor (VR) device. PROGRAMMING THE VARIABLE RESISTOR Rheostat Operation The nominal resistance of the RDAC between Terminal A and Terminal B is available in 5 kΩ, 10 kΩ, 50 ...

Page 14

AD5246 A repeated write function gives the user flexibility to update the RDAC output a number of times after addressing the part only once. For example, after the RDAC has acknowledged its slave address in write mode, the RDAC output ...

Page 15

Data Sheet LAYOUT AND POWER SUPPLY BYPASSING good practice to use a compact, minimum lead-length layout design. The leads to the inputs should be as direct as possible with a minimum conductor length. Ground paths should have ...

Page 16

... AD5246BKSZ10-RL7 10 AD5246BKSZ50-RL7 50 AD5246BKSZ100-R2 100 AD5246BKSZ100-RL7 100 EVAL-AD5246DBZ RoHS Compliant Part. 2 The evaluation board is shipped with the 10 kΩ R Purchase of licensed components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I Rights to use these components ...

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