AD5173:  256-Position One-Time Programmable Dual-Channel I2C Compatible Digital Potentiometer

The AD5172/AD5173 are dual-channel, 256-position, one-time programmable (OTP) digital potentiometers1 that employ fuse link technology to achieve memory retention of resistance settings. OTP is a ...More

AD5173:  256-Position One-Time Programmable Dual-Channel I2C Compatible Digital Potentiometer

Product Description

The AD5172/AD5173 are dual-channel, 256-position, one-time programmable (OTP) digital potentiometers1 that employ fuse link technology to achieve memory retention of resistance settings. OTP is a cost-effective alternative to EEMEM for users who do not need to program the digital potentiometer setting in memory more than once. These devices perform the same electronic adjustment function as mechanical potentiometers or variable resistors with enhanced resolution, solid-state reliabil-ity, and superior low temperature coefficient performance.

The AD5172/AD5173 are programmed using a 2-wire, I2C®-compatible digital interface. Unlimited adjustments are allowed before permanently setting the resistance value. During OTP activation, a permanent blow fuse command freezes the wiper position (analogous to placing epoxy on a mechanical trimmer).

Unlike traditional OTP digital potentiometers, the AD5172/ AD5173 have a unique temporary OTP overwrite feature that allows for new adjustments even after a fuse is blown. However, the OTP setting is restored during subsequent power-up condi-tions. This allows users to treat these digital potentiometers as volatile potentiometers with a programmable preset.

Applications

  • Systems calibration
  • Electronics level setting
  • Mechanical trimmers replacement in new designs
  • Permanent factory PCB setting
  • Transducer adjustment of pressure, temperature, position, chemical, and optical sensors
  • RF amplifier biasing
  • Automotive electronics adjustment
  • Gain control and offset adjustment

    • 1 The terms digital potentiometer, VR, and RDAC are used interchangeably.

    Data Sheet, Rev. F, 7/08

    Features

    • 2-channel, 256-position potentiometers
    • One-time programmable (OTP) set-and-forget resistance setting provides a low cost alternative to EEMEM
    • Unlimited adjustments prior to OTP activation
    • OTP overwrite allows dynamic adjustments with user-defined preset
    • End-to-end resistance: 2.5 kΩ, 10 kΩ, 50 kΩ, 100 kΩ
    • Compact 10-lead MSOP (3 mm × 4.9 mm) package
    • Fast settling time: tS = 5 μs typical in power-up
    • See Data Sheet for Additional Information

    Diagrams

    AD5173 Diagram
    Functional Block Diagram for AD5173

    Specifications

    # Channels 2
    # Positions 256
    Memory Type One Time Programmable
    Interface I2C
    Resistor Values (kOhms) 2.5, 10, 50, 100
    Voltage Range (V) +5.5V
    Supply Current (max) 3.5µA
    Temp. Range -40 °C to.. 125Deg
    Absolute Tempco (ppm/°C) 35ppm/C
    Package MSOP

    Explore Other Products

    Part# # Channels # Positions Memory Type Interface Resistor Values (kOhms) Bipolar Voltage Range (V) Voltage Range (V) Supply Current (max) Temp. Range -40 °C to.. Absolute Tempco (ppm/°C) Price* (1000-4999)
    ADN2860 3 512 Non-Volatile I2C 25, 250 ±2.75 - 10µA 85 15 $5.97
    AD5228 1 32 Volatile Pushbutton 10, 50, 100 - +5.5 0.4µA 105 35 $0.34
    AD5201 1 33 Volatile SPI 10, 50 ±3 +5.5 15µA 85 500 $0.50
    AD5227 1 64 Volatile Up/Down 10, 50, 100 - +5.5 0.4µA 105 35 $0.36
    AD5246 1 128 Volatile I2C 5, 10, 50, 100 - +5.5 3µA 125 35 $0.45
    AD5247 1 128 Volatile I2C 5, 10, 50, 100 - +5.5 3µA 125 35 $0.45
    AD5220 1 128 Volatile Up/Down 10, 50, 100 - +5.5 15µA 85 800 $0.90
    AD7376 1 128 Volatile SPI 10, 50, 100, 1M ±15 +28 10µA 85 35 $2.86
    AD5160 1 256 Volatile SPI 5, 10, 50, 100 - +5.5 3µA 125 35 $0.64
    AD5165 1 256 Volatile SPI 100 - +5.5 0.05µA 125 35 $0.58
    AD5245 1 256 Volatile I2C 5, 10, 50, 100 - +5.5 3µA 125 35 $0.64
    AD5161 1 256 Volatile I2C, SPI 5, 10, 50, 100 - +5.5 3µA 125 35 $0.65
    AD5241 1 256 Volatile I2C 10, 100, 1M ±3 +5.5 0.1µA 105 30 $0.93
    AD5200 1 256 Volatile SPI 10, 50 ±3 +5.5 15µA 85 500