ad5258 Analog Devices, Inc., ad5258 Datasheet
ad5258
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ad5258 Summary of contents
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... Automotive electronics adjustment Gain control and offset adjustment Fiber to the home systems Electronics level settings GENERAL DESCRIPTION The AD5258 provides a compact, nonvolatile 3 mm × 4.9 mm packaged solution for 64-position adjustment applications. These devices perform the same electronic adjustment function as 1 mechanical potentiometers or variable resistors, but with enhanced resolution and solid-state reliability ...
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... AD5258 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 Functional Block Diagrams............................................................. 1 General Description ......................................................................... 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Electrical Characteristics............................................................. 3 Timing Characteristics ................................................................ 5 Absolute Maximum Ratings............................................................ 6 ESD Caution.................................................................................. 6 Pin Configuration and Function Descriptions............................. 7 Typical Performance Characteristics ............................................. 8 Test Circuits..................................................................................... 13 Theory of Operation ...................................................................... 14 Programming the Variable Resistor......................................... 14 Programming the Potentiometer Divider ............................... 14 ...
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... GND, code = 0x20 Rev Page AD5258 1 Min Typ Max Unit LSB −1.5 ±0.3 +1.5 −0.25 ±0.1 +0.25 LSB −5 ±0.5 +5 −0.5 ±0.1 +0.5 −0.25 ±0.1 +0.25 0.9 1.5 kΩ −30 +30 ...
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... AD5258 Parameter POWER SUPPLIES Power Supply Range Positive Supply Current Logic Supply Logic Supply Current Programming Mode Current (EEPROM) Power Dissipation Power Supply Rejection Ratio DYNAMIC CHARACTERISTICS Bandwidth −3 dB Total Harmonic Distortion V Settling Time W Resistor Noise Voltage Density 1 Typical values represent average readings at 25°C and V ...
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... JEDEC Std. 22, Method A117. Retention lifetime based on an activation energy of 0.6 eV derates Figure Interface Timing Diagram Rev Page AD5258 Min Typ Max 0 400 1.3 0.6 1.3 0.6 0.6 0 0.9 100 300 300 0.6 26 300 and GND. ...
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... AD5258 ABSOLUTE MAXIMUM RATINGS T = 25°C, unless otherwise noted. A Table 3. Parameter V to GND GND MAX 1 Pulsed Continuous Digital Inputs and Output Voltage to GND Operating Temperature Range Maximum Junction Temperature (T ) JMAX Storage Temperature Reflow Soldering Peak Temperature Time at Peak Temperature ...
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... Programmable Pin 1 for Multiple Package Decoding. State is registered on power-up. Serial Data Input/Output. Serial Clock Input. Positive edge triggered. Logic Power Supply. Digital Ground. Positive Power Supply. B Terminal, GND ≤ V ≤ Terminal, GND ≤ V ≤ Rev Page AD5258 ...
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... AD5258 TYPICAL PERFORMANCE CHARACTERISTICS 5 kΩ 25°C, unless otherwise noted. DD LOGIC AB A 0.5 0.4 0.3 0.2 0.1 0 5.5V –0.1 –0.2 –0.3 –0.4 –0 CODE (Decimal) Figure 5. R-INL vs. Code vs. Supply Voltages 0.25 0.20 0.15 0.10 0.05 0 –0.05 –0.10 –0.15 –0.20 –0. CODE (Decimal) Figure 6. R-DNL vs. Code vs. Supply Voltages ...
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... – Figure 16. Logic Supply Current vs. Temperature vs. V Rev Page AD5258 ZSE @ V = 2.7V DD ZSE @ V = 5.5V DD – TEMPERATURE (°C) Figure 14. Zero-Scale Error vs. Temperature V = 5.5V DD – TEMPERATURE (°C) Figure 15. Supply Current vs. Temperature ...
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... AD5258 250 200 150 1k 100 50k 50 10k 0 –50 100k –100 –150 CODE (Decimal) Figure 17. Rheostat Mode Tempco (ΔR ×10 AB 120 100 50k 20 0 10k 100k – CODE (Decimal) Figure 18. Potentiometer Mode Tempco (ΔV W 350 300 ...
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... Figure 26. Power Supply Rejection Ratio vs. Frequency Rev Page LOGIC LOGIC (V) IH Figure 25. Logic Supply Current vs. Input Voltage = LOGIC B PSRR @ ± 10% p-p AC LOGIC PSRR @ ± 10% p-p AC LOGIC 1k 10k 100k FREQUENCY (Hz) AD5258 5 1M ...
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... AD5258 SCL 2 400ns/DIV Figure 27. Digital Feedthrough 1µs/DIV Figure 28. Midscale Glitch, Code 0×7F to Code 0× Figure 29. Large-Signal Settling Time Rev Page SCL 200ns/DIV ...
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... V MS Figure 33. Test Circuit for Power Supply Sensitivity (PSS, PSSR) DUT + AD8610 B OFFSET GND –5V +2.5V Figure 34. Test Circuit for Gain vs. Frequency 0. DUT CODE = 0x00 GND Figure 35. Test Circuit for Common-Mode Leakage Current AD5258 % % V OUT ...
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... AD5258 THEORY OF OPERATION The AD5258 is a 64-position digitally controlled variable resistor (VR) device. The wipers default value prior to pro- gramming the EEPROM is midscale. PROGRAMMING THE VARIABLE RESISTOR Rheostat Operation The nominal resistance ( the RDAC between Terminal A AB and Terminal B is available in 1 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ. ...
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... If different instructions are needed, the write/read mode must restart with a new slave address, instruction, and data byte. Similarly, a repeated read function of the RDAC is also allowed. Rev Page AD5258 th clock th clock pulse and raises SDA high to ...
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... AD5258 BYTE FORMATS The following generic, write, read, and store/restore control registers for the AD5258 refer to the device addresses listed in Table 5, and following is the mode/condition reference key. • Start Condition • Stop Condition • Slave Acknowledge • Master Acknowledge • ...
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... Slave Address Byte ↑ Repeat Start Rev Page Read-back Data Read-back Data Instruction Byte Instruction Byte AD5258 ...
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... SIGN SEVEN BITS FOR AN INTEGER NUMBER Figure 39. Format of Stored Tolerance in Sign Magnitude Format with Bit Position Descriptions The AD5258 features a patented R tolerance storage in the AB nonvolatile memory. Tolerance is stored in the memory during factory production and can be read by users at any time. The ...
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... GND DD MULTIPLE DEVICES ON ONE BUS V LOGIC The AD5258 has two configurable address pins, AD0 and AD1. SCL The state of these two pins is registered upon power-up and decoded into a corresponding I SDA Table 5). This allows up to four devices on the bus to be written to or read from independently ...
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... AD5258 DISPLAY APPLICATIONS CIRCUITRY A special feature of the AD5258 is its unique separation of the V and V supply pins. The reason for doing this is LOGIC DD to provide greater flexibility in applications that do not always provide the needed supply voltages. In particular, LCD panels often require a V the range The circuit in Figure 44 is the rare exception in which supply is available to power the digital potentiometer ...
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... OUTLINE DIMENSIONS ORDERING GUIDE Model R (kΩ AD5258BRMZ1 1 1 AD5258BRMZ1-R7 1 AD5258BRMZ10 AD5258BRMZ10- AD5258BRMZ50 50 1 AD5258BRMZ50- AD5258BRMZ100 100 1 AD5258BRMZ100-R7 100 2 AD5258EVAL Z = RoHS Compliant Part The evaluation board is shipped with the 10 kΩ R 3.10 3.00 2. 5.15 3.10 4.90 3.00 4.65 2. PIN 1 0.50 BSC 0.95 0.85 1.10 MAX ...
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... AD5258 NOTES Rev Page ...
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... NOTES Rev Page AD5258 ...
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... AD5258 NOTES 2 Purchase of licensed I C components of Analog Devices or one of its sublicensed Associated Companies conveys a license for the purchaser under the Philips I 2 Rights to use these components system, provided that the system conforms to the I ©2005–2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners ...