AD5233:  Nonvolatile, Quad, 64-Position Digital Potentiometer

The AD5233 is a quad-channel nonvolatile memory,* digitally controlled potentiometer** with a 64-step resolution. The device performs the same electronic adjustment function as a mechanical ...More

AD5233:  Nonvolatile, Quad, 64-Position Digital Potentiometer

Product Description

The AD5233 is a quad-channel nonvolatile memory,* digitally controlled potentiometer** with a 64-step resolution. The device performs the same electronic adjustment function as a mechanical potentiometer with enhanced resolution, solid-state reliability, and remote controllability. The AD5233 has versatile program-ming using a serial peripheral interface (SPI) for 16 modes of operation and adjustment, including scratchpad programming, memory storing and restoring, increment/decrement, ±6 dB/step log taper adjustment, wiper setting readback, and extra EEMEM for user-defined information such as memory data for other components, look-up tables, or system identification information.

In the scratchpad programming mode, a specific setting can be programmed directly to the RDAC register, which sets the resistance between Terminal W to Terminal A and Terminal W to Terminal B. This setting can be stored into the EEMEM and is transferred automatically to the RDAC register during system power-on.

The EEMEM content can be restored dynamically or through external PR strobing. A WP function protects EEMEM contents. To simplify the programming, independent or simultaneous increment or decrement commands can be used to move the RDAC wiper up or down, one step at a time. For logarithmic ±6 dB step changes in wiper settings, the left or right bit shift command can be used to double or halve the RDAC wiper setting.

The AD5233 is available in a thin 24-lead TSSOP package. The part is guaranteed to operate over the extended industrial temperature range of −40°C to +85°C.

Applications

  • Mechanical potentiometer replacement
  • Instrumentation: gain, offset adjustment
  • Programmable voltage-to-current conversion
  • Programmable filters, delays, time constants
  • Programmable power supply
  • Sensor calibration

    • * The terms nonvolatile memory and EEMEM are used interchangeably.
    ** The terms digital potentiometer and RDAC are used interchangeably.

    Data Sheet, Rev. B, 5/08

    Features

    • Nonvolatile Memory Preset Maintains Wiper Settings
    • 4-channel independent programmable
    • 64-position resolution
    • Power-on refreshed with EEMEM settings
    • EEMEM restore time: 140 μs typical
    • Full monotonic operation
    • 10 kΩ, 50 kΩ, and 100 kΩ terminal resistance
    • See Data Sheet for Additional Information

    Diagrams

    AD5233 Diagram
    Functional Block Diagram for AD5233

    Specifications

    # Channels 4
    # Positions 64
    Memory Type Non-Volatile
    Interface SPI
    Resistor Values (kOhms) 10, 50, 100
    Bipolar Voltage Range (V) ±3V
    Voltage Range (V) +5.5V
    Supply Current (max) 3.5µA
    Temp. Range -40 °C to.. 85Deg
    Absolute Tempco (ppm/°C) 600ppm/C
    Package TSSOP

    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 $0.89
    AD8400 1