EVAL-AD5245EBZ Analog Devices Inc, EVAL-AD5245EBZ Datasheet
EVAL-AD5245EBZ
Specifications of EVAL-AD5245EBZ
Related parts for EVAL-AD5245EBZ
EVAL-AD5245EBZ Summary of contents
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... Single supply: 2 5.5 V Low temperature coefficient 45 ppm/°C Low power µA DD Wide operating temperature: –40°C to +125°C Evaluation board available APPLICATIONS Mechanical potentiometer replacement in new designs LCD panel V adjustment COM LCD panel brightness and contrast control Transducer adjustment of pressure, temperature, position, ...
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... Changes to Figure 40..................................................................... 14 Moved Power-Up Sequence Section to Page ............................. 14 Moved Layout and Power Supply Bypassing Section to Page . 15 Added Constant Bias to Retain Resistance Setting Section..... 15 Added Figure 42 ............................................................................ 15 Added Evaluation Board Section ................................................ 15 Added Figure 43 ............................................................................ 15 2 Moved I C Interface Section to Page........................................... 16 Changes to I2C Compatible 2-Wire Serial Bus Section ........... 16 Moved Table 5 and Table 6 to Page ...
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ELECTRICAL CHARACTERISTICS 5 kΩ VERSION ± 10 ± 10 Table 1. Parameter DC CHARACTERISTICS—RHEOSTAT MODE 2 Resistor Differential Nonlinearity 2 Resistor Integral Nonlinearity 3 Nominal Resistor Tolerance ...
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AD5245 10 kΩ, 50 kΩ, 100 kΩ VERSIONS ± 10 ± 10 Table 2. Parameter DC CHARACTERISTICS—RHEOSTAT MODE 2 Resistor Differential Nonlinearity 2 Resistor Integral Nonlinearity 3 ...
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TIMING CHARACTERISTICS 5 KΩ, 10 KΩ, 50 KΩ, 100 KΩ VERSIONS ± 10 ± 10 Table 3. Parameter INTERFACE TIMING CHARACTERISTICS SCL Clock Frequency ...
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AD5245 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 4. Parameter V to GND GND Terminal Current ...
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PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 5. Pin Function Descriptions Pin No. Mnemonic Description Terminal. GND ≤ Positive Power Supply GND Digital Ground. 4 SCL Serial Clock Input. Positive edge triggered. Pull-up ...
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AD5245 TYPICAL PERFORMANCE CHARACTERISTICS 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1 128 CODE (Decimal) Figure 4. R-INL vs. Code vs. Supply Voltages 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 ...
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CODE (Decimal) Figure 10. R-INL vs. Code vs. Temperature, V 1.0 0.8 0.6 0.4 0.2 0 –0.2 –0.4 –0.6 –0.8 –1.0 0 ...
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AD5245 200 150 100 50 0 – 128 CODE (Decimal) Figure 16. Rheostat Mode Tempco ∆R 160 140 120 100 – 128 CODE (Decimal) Figure 17. Potentiometer ...
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REF LEVEL /DIV –5.000dB 0.500dB –5.5 –6.0 –6.5 –7.0 –7.5 –8.0 –8 50kΩ –9 10kΩ 100kΩ –9.5 –10.0 –10.5 10k 100k 1M START 1 000.000Hz STOP 1 000 000.000Hz Figure 22. –3 ...
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AD5245 TEST CIRCUITS Figure 28 to Figure 34 illustrate the test circuits that define the test conditions used in the product specification tables (Table 1 through Table 3). DUT Figure 28. Test Circuit for Potentiometer Divider ...
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THEORY OF OPERATION The AD5245 is a 256-position digitally controlled variable resistor (VR) device. An internal power-on preset places the wiper at midscale during power-on, which simplifies the fault condition recovery at power-up. PROGRAMMING THE VARIABLE RESISTOR Rheostat Operation The ...
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AD5245 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, which must be DD ...
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... EVALUATION BOARD An evaluation board, along with all necessary software, is available to program the AD5245 from any PC running Windows® 98/2000/XP. The graphical user interface, as shown in Figure 43, is straightforward and easy to use. More detailed information is available in the user manual, which is provided with the board ...
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AD5245 I C INTERFACE C-COMPATIBLE 2-WIRE SERIAL BUS 2 The 2-wire I C serial bus protocol operates as follows: 1. The master initiates data transfer by establishing a START condition, which is when a high-to-low transition on ...
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Table 8 . Write Mode AD0 Slave Address Byte Table 9. Read Mode AD0 Slave Address Byte S = START condition P ...
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AD5245 Multiple Devices on One Bus Figure 47 shows two AD5245 devices on the same serial bus. Each has a different slave address because the states of their AD0 pins are different. This allows the RDAC within each device to ...
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... AD5245BRJ100-R2 –40°C to +125°C AD5245BRJ100-RL7 –40°C to +125°C 1 AD5245BRJZ100-R2 –40°C to +125°C 1 AD5245BRJZ100-RL7 –40°C to +125°C 2 AD5245EVAL Pb-free part. 2 The evaluation board is shipped with the 10 kΩ R 2.90 BSC 1.60 BSC 2.80 BSC PIN 1 0.65 BSC 1.95 1 ...
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AD5245 NOTES 2 Purchase of licensed I C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the 2 purchaser under the Philips I C Patent Rights to use these components ...