Digital Potentiometers Overview

1. Digital PotentiometersOverview Customer Overview Presentation December 2003 www.analog.com/DigitalPOTs

2. ADI’s DigiPOT Technology Leadership Non-Volatile 11 OTPOne-Time-Programmable 5 Volatile 27 Number of products offered by Analog Devices, 3Q 2003

3. Developing Cores for Key Markets DIGITAL POTENTIOMETERS Hi Voltage Cores Low Voltage, Compact Cores Nonvolatile Cores OTP Cores ATE Optical Comms Inst & Medical Comms Automotive Industrial Consumer Computer Key Target Market Segments

4. Digitally Controlled Resistors Summary ADI Value Proposition • The Best Resolution • Smallest Package Size • Lowest Tempco (Includes NV parts) 35ppm/ºC • Complete Portfolio • All voltages (2.7 V to 30 V) in dual supplies ±5 to ±15V • Most resistor options (1K to 1M Ω) • Best Reliability (Shipped 10 M pcs into automotive apps) • Competitive Pricing Role of Digital Potentiometers • The fundamental need that digital POTs provide are the electronic adjustment of imperfect sensors and actuators • Digital POTs are used to perform calibration of position, temperature, timing, frequency, lumens, contrast, brightness, gain and offset errors • Digital POTs avoid the inherent problems associated with mechanical potentiometers: Wiper Contamination, noise, contact resistance, vibration sensitivity, wear-out, screwdriver access, physical size

5. Digitally Controlled Resistors Summary ADI Value Proposition • Best Resolution • Smallest Package Size • Lowest Tempco (Includes NV parts) 35ppm/ºC • Complete Portfolio • All voltages (2.7 V to 30 V) in dual supplies ±5 to ±15V • Most resistor options (1K to 1M Ω) • Best Reliability (Shipped 10 M pcs into automotive apps) • Competitive Pricing Role of Digital Potentiometers • The fundamental need that digital POTs provide are the electronic adjustment of imperfect sensors and actuators • Perform calibration of position, temperature, timing, frequency, lumens, contrast, brightness, gain and offset errors • Digital POTs avoid the inherent problems associated with mechanical potentiometers: Wiper Contamination, noise, contact resistance, vibration sensitivity, wear-out, screwdriver access, physical size • High Resolution, Remote Controllable, Minimum Drift, No Mechanical Wear-out, Insensitive to Vibration, High Density Multi-Channels, Daisy Chainable, Less Bulky, Fast Adjustment Time, Ease of Layout, Scalable Resistance and Resolution, Permanent Settings and Additional Information Can be Saved In EEMEM, Make Automation Possible

6. General Purpose Applications Sensor Calibration System Gain and Offset Adjustments Programmable Gain Amplifiers Programmable Filters Programmable Set Point Digital-to-Analog Conversion Voltage-to-Current Conversion Line Impedance Matching Computer & Networking Equipments Programmable Power Supplies Power Supply Margining Battery Charger Set-point Temperature Control Set-point LCD Displays LCD Backlight Adjustment Display Contrast & Brightness Adjustments LCD Panel Vcom Adjustment Programmable Gamma Correction LCD Projector Reference Generator Consumer Electronics PDA Backlight Adjustment Portable Electronics Volume Control RF Communications RF Power Amplifier Biasing DDS/PLL Amplitude Adjustment VCXO Frequency Tuning Varactor Diode Biasing Logarithmic Amplifier Slope and Intercept Adjustments Quadrature Demodulator Gain and Phase Adjustments RFID Reader Calibration Industrial and Instrumentation System Calibration Floating References DAC Programmable 4m-to-20mA Current Transmitter Optical Communications Laser Bias Current Adjustment Laser Modulation Current Adjustment Optical Receiver Signal Conditioning Optical Attenuator Wavelength Control Automotive Engine Control Unit Set-point Sensors Calibrations Actuators Controls Instrumentations Controls Navigation/Entertainment Display Adjustments Applications At A Glance

7. Power Management Systems Parameters Adjustments DC-DC Converter Boost Regulator LDO ADP3171 ADP3031 ADP3334 FB * FB ADJ Adjustable Output Adjustable Output REF Adjustable Output * Beware Output limit Battery Charger ADR421 ADP3811 TRIM VCTRL V Adjustable Current For Various Charge Time Requirements Output Precision Trimming

8. AD8302 VMAG MSET PSET VPHS GAIN PHASE Communication System Parameter Adjustments Using Digital Pot LogAmp RF/IF Gain/Phase Detector RF Detector AD8307 AD8314 INT OFS VSET V Intercept and Offset Adjustments Adjustable Mag and Phase Slope Adjust to Enhance Receiving Signal Sensitivity PLL Quadrature Demodulator DDS ADF4252 AD8348 AD9832 RSET IOFS QOFS FS_ADJ V Charge Pump Current Adjust for Loop Open and Closing for Adjusting/Locking on the fly Full Scale Current Adjust to achieve best for SFDR Adjustable I-Ch & Q-Ch Offset

9. LCD Panel Programmable Vcom

10. LCD Backlight Control

11. Automotive – Navigator LCD Controls AD5253 DigiPOT for I2C interface Apps

12. Digital Potentiometer Product Families • OTP (One Time Programmable) Family • EEMEM Nonvolatile Memory Family • Compact & Low Power Family • High Voltage Family

13. High Voltage Low Tempco CTRL Permanently Set OTP +15V or ±5V Operation New Digital Potentiometers Built-in Memory Ultra Compact (2 x 2.1 mm) One Time Programmable Family • Set & Forget permanent wiper setting • 64-position SOT23-8 • AD5273 • 64-position, low TC SOT23-8 • AD5171 • 256-position, low TC MSOP-10, 2nd Chance • AD5170 • Dual, 256-position, low TC MSOP-10 • AD5172/73 Nonvolatile Memory Family • Holds wiper setting, can be reprogrammed • Dual/Quad 64-position, I2C • AD5251/53* • Dual/Quad 256-position, I2C • AD5252/54* • Dual 9-bit + 7-bit + 256-bytes, I2C • AD5255* Ultra Compact Family • Volatile parts midscale preset • 256-position, SOT23-8, SPI • AD5160 • 256-position, SOT23-8, I2C • AD5245 • 128-position SC70-6 Rheostat/DigiPOT • AD5246/AD5247 • Dual, 256-position MSOP-10, SPI • AD5162* • Dual, 256-position MSOP-10, I2C • AD5243/48* • Up/Down Control SOT23-8 • AD5227* • Push-Button Up/Down SOT23-8 • AD5228* High Voltage, +15V or ±5V, Low Tempco Family • Volatile parts for Industrial & LCD control • Single/Dual 256-Position, SPI • AD5260/62 • Single/Dual 256-Position, I2C • AD5280/82 • Quad 256-Position, SPI / I2C Selectable • AD5263 *Parts in Development Four New DigiPOT Families In FY2003/04 Development & Introduction [NOTE: Analog devices 2003 developments & 2004 Intros are focused in these 4 areas.]

14. Summary • The Applications of Digital Pots are Endless. • Digital Pot is Targeted to Replace Mechanical Pot as well as Filling the Gap of DACs. • Digital Pot Creates Unique Solutions in Some Cases and Should no Longer be Considered an Accessory. • We are Looking Forward for Product Ideas!

15. Appendix

16. AD5273 / AD5171 Evaluation Kits 1. Install Software 2. Open AD5273 program and adjust the resistance setting Parallel Port Interface Board 4. Provide Power Supply +5V GND 3. Connect Network Data Cable W B Testing Digital Pots in Minutes ! 5. Measure Result Eval Board

17. OTP Family of Digital Pots with Software Provides Total Solution Installable at the Factory, Runs on Win98 to XP, and No Programming Skills Needed !

18. OPT – Factory Programming Solution PCB Layout W VDD DGND SCL A B A0 SDA Pogo Pins Connected to Factory PC

19. Digital Potentiometer Selection guide Blue colored parts have a TC of 30 ppm/°C

20. Blue colored parts have a TC of 30 ppm/°C

21. Nonvolatile Portfolio – Resolution Vs #CH Parts in BLUE are under development

22. Comprehensive Introduction toDigital Potentiometers Literature Order Number: BRO3709-10-4/03 (0) Available from ADI Literature Dept

23. Battery Depletion Over Time