AD5243 AD [Analog Devices], AD5243 Datasheet
AD5243
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AD5243 Summary of contents
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... RF amplifier biasing Automotive electronics adjustment Gain control and offset adjustment GENERAL DESCRIPTION The AD5243 and AD5248 provide a compact 3 mm × 4.9 mm packaged solution for dual 256-position adjustment applica- tions. These devices perform the same electronic adjustment function as a 3-terminal mechanical potentiometer (AD5243 2-terminal variable resistor (AD5248). Available in four different end-to-end resistance values (2.5 kΩ ...
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... AD5243/AD5248 TABLE OF CONTENTS Electrical Characteristics—2.5 kΩ Version ................................... 3 Electrical Characteristics—10 kΩ, 50 kΩ, 100 kΩ Versions ....... 4 Timing Characteristics—All Versions ........................................... 5 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configurations and Function Descriptions ........................... 7 Typical Performance Characteristics ............................................. 8 Test Circuits..................................................................................... 12 Theory of Operation ...................................................................... 13 Programming the Variable Resistor and Voltage.................... 13 Programming the Potentiometer Divider ...
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... V rms kHz ±1 LSB error band 1.25 kΩ N_WB WB S Rev Page AD5243/AD5248 1 Min Typ −2 ±0.1 −6 ±0.75 −20 35 160 −1.5 ±0.1 −2 ±0.6 15 −10 −2 GND ...
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... AD5243/AD5248 ELECTRICAL CHARACTERISTICS—10 kΩ, 50 kΩ, 100 kΩ VERSIONS ± 10 ± 10 Table 2. Parameter DC CHARACTERISTICS—RHEOSTAT MODE 2 Resistor Differential Nonlinearity Resistor Integral Nonlinearity 2 3 Nominal Resistor Tolerance Resistance Temperature Coefficient R (Wiper Resistance CHARACTERISTICS—POTENTIOMETER DIVIDER MODE (Specifications Apply to All VRs) ...
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... After this period, the first clock pulse is 2 generated the SCL signal. LOW Rev Page AD5243/AD5248 1 Min Typ Max Unit 0 400 kHz 1.3 µs 0.6 µs 1.3 µs 0.6 µs 0.6 µs 0.9 µs 100 ns 300 ...
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... AD5243/AD5248 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 4. Parameter V to GND GND Terminal Current Bx Wx Pulsed Continuous Digital Inputs and Output Voltage to GND Operating Temperature Range Maximum Junction Temperature (T ) JMAX Storage Temperature Lead Temperature (Soldering, 10 sec) θ ...
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... AD5243 TOP VIEW GND 4 7 SDA V 6 SCL 5 DD Figure 3. AD5243 Pin Configuration Table 5. AD5243 Pin Function Descriptions Pin No. Mnemonic Description Terminal Terminal Terminal. 4 GND Digital Ground Positive Power Supply SCL Serial Clock Input ...
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... AD5243/AD5248 TYPICAL PERFORMANCE CHARACTERISTICS 2.0 1.5 1 2. 5.5V DD –0.5 –1.0 –1.5 –2 128 160 CODE (DECIMAL) Figure 5. R-INL vs. Code vs. Supply Voltages 0.5 0.4 0.3 0 2.7V DD 0.1 0 –0.1 –0 5.5V DD –0.3 –0.4 –0 128 160 CODE (DECIMAL) Figure 6. R-DNL vs. Code vs. Supply Voltages 0.5 0 –40°C, +25°C, +85°C, +125° ...
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... R = 10kΩ 0.1 224 256 –40 120 R = 10kΩ AB 100 – 110 125 Rev Page AD5243/AD5248 R = 10kΩ 2.7V 2. 5.5V 5. –25 – TEMPERATURE (°C) Figure 14. Zero-Scale Error vs. Temperature ...
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... AD5243/AD5248 2. –40°C TO +85°C, –40°C TO +125° – 5. –40°C TO +85°C, –40°C TO +125°C A –20 – 128 160 CODE (DECIMAL) Figure 17. Potentiometer Mode Tempco ∆V 0 0x80 –6 0x40 –12 0x20 – ...
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... DIGITAL INPUT VOLTAGE (V) Figure 23. I vs. Input Voltage SCL Figure 24. Digital Feedthrough Figure 25. Digital Crosstalk T = 25° 4.0 4.5 5 SCL Rev Page AD5243/AD5248 Figure 26. Analog Crosstalk Figure 27. Midscale Glitch, Code 0x80 to 0x7F Figure 28. Large Signal Settling Time ...
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... AD5243/AD5248 TEST CIRCUITS Figure 29 through Figure 35 illustrate the test circuits that define the test conditions used in the product specification tables DUT 1LSB = V+/ Figure 29. Test Circuit for Potentiometer Divider Nonlinearity Error (INL, DNL) NO CONNECT DUT Figure 30. Test Circuit for Resistor Position Nonlinearity Error (Rheostat Operation ...
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... THEORY OF OPERATION The AD5243/AD5248 are 256-position digitally controlled variable resistor (VR) devices. 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 AND VOLTAGE Rheostat Operation The nominal resistance of the RDAC between Terminals A and B is available in 2.5 kΩ ...
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... Figure 40. This applies to the digital input pins SDA, SCL, AD0, and AD1 (AD5248 only). with AB TERMINAL VOLTAGE OPERATING RANGE The AD5243/AD5248 V boundary conditions for proper 3-terminal digital potentiome- ter operation. Supply signals present on Terminals A, B, and W that exceed V biased diodes (see Figure 41). ...
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... GND lower cost and smaller size offered by the AD5243/AD5248. If and when total power is lost, the user should be provided with a means to adjust the setting accordingly. EVALUATION BOARD ...
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... R/ W bit (this bit deter- mines whether data is read from or written to the slave device). The AD5243 has a fixed slave address byte, while the AD5248 has two configurable address bits AD0 and AD1 (see Table 9). ...
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... Figure 45 Interface Detailed Timing Diagram R ACK BY AD5243 FRAME 2 INSTRUCTION BYTE Figure 46. Writing to the RDAC Register—AD5243 Rev Page AD5243/AD5248 Data Byte Data Byte ...
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... MASTER SLAVE ADDRESS BYTE 1 SCL 0 SDA START BY MASTER SLAVE ADDRESS BYTE Figure 48. Reading Data from a Previously Selected RDAC Register in Write Mode—AD5243 1 SCL 0 SDA START BY MASTER SLAVE ADDRESS BYTE Figure 49. Reading Data from a Previously Selected RDAC Register in Write Mode—AD5248 Multiple Devices on One Bus (Applies Only to AD5248) Figure 50 shows four AD5248 devices on the same serial bus ...
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... Model R AB AD5243BRM2.5 2.5 kΩ AD5243BRM2.5-RL7 2.5 kΩ AD5243BRM10 10 kΩ AD5243BRM10-RL7 10 kΩ AD5243BRM50 50 kΩ AD5243BRM50-RL7 50 kΩ AD5243BRM100 100 kΩ AD5243BRM100-RL7 100 kΩ AD5243EVAL See Note 1 AD5248BRM2.5 2.5 kΩ AD5248BRM2.5-RL7 2.5 kΩ AD5248BRM10 10 kΩ AD5248BRM10-RL7 10 kΩ AD5248BRM50 50 kΩ ...
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... AD5243/AD5248 NOTES Purchase of licensed components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I 2 Patent Rights to use these components © 2004 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. ...