Overview
The AD5207BRU50-REEL7, produced by Analog Devices Inc., is a 2-channel, 256-position digital potentiometer. This device performs the same electronic adjustment function as a mechanical potentiometer or variable resistor. Each channel contains a fixed resistor with a wiper contact that taps the fixed resistor value at a point determined by a digital code loaded into the SPI-compatible serial-input register. The AD5207 is available in a 1.1mm thin TSSOP-14 package, making it suitable for PCMCIA applications, and operates over an extended industrial temperature range of -40°C to +125°C.
Key Specifications
| Parameter | Value | Notes |
|---|---|---|
| Number of Channels | 2 | |
| Number of Positions | 256 | |
| Resistor Values | 10 kΩ, 50 kΩ, 100 kΩ | Nominal resistance between Terminals A and B |
| Temperature Range | -40°C to +125°C | Extended industrial temperature range |
| Power Supply | +2.7V to +5.5V (Single Supply), ±2.7V (Dual Supply) | |
| Package Type | TSSOP-14 | 1.1mm thin package |
| Shutdown Current | < 5µA | During shutdown mode |
| Digital Interface | 3-Wire SPI Compatible | Serial Data Input (SDI), Chip Select (CS), Serial Clock (CLK) |
Key Features
- Dual Channel Operation: Each channel is a 256-position digitally controlled variable resistor.
- Programmable Resistance: The resistance between the wiper and either end point of the fixed resistor varies linearly with respect to the digital code.
- Power Shutdown: The SHDN pin forces an open circuit on Terminal A and shorts the wiper to Terminal B, achieving a microwatt power shutdown state.
- SPI Compatible Interface: Standard three-wire serial input control interface with clock, chip select, and serial data input pins.
- Low Power Consumption: Minimal leakage current during shutdown, maintaining previous resistance values when resumed.
- ESD Protection: Digital inputs are protected with a series input resistor and parallel Zener ESD structure.
Applications
- Mechanical Potentiometer Replacement: Replaces mechanical potentiometers in various applications.
- Stereo Channel Audio Level Control: Used for adjusting audio levels in stereo channels.
- Instrumentation: For gain and offset adjustments in instrumentation systems.
- Programmable Voltage to Current Conversion: Used in voltage to current conversion circuits.
- Programmable Filters, Delays, Time Constants: Used in filter, delay, and time constant circuits.
- Line Impedance Matching: For impedance matching in various circuits).
- Automotive Electronics Adjustment: Used in automotive electronics for various adjustments).
Q & A
- What is the AD5207BRU50-REEL7 used for?
The AD5207BRU50-REEL7 is a 2-channel, 256-position digital potentiometer used to replace mechanical potentiometers and for various electronic adjustments in different applications.
- What are the available resistor values for the AD5207?
The AD5207 is available with nominal resistance values of 10 kΩ, 50 kΩ, and 100 kΩ between Terminals A and B.
- What is the operating temperature range of the AD5207?
The AD5207 operates over an extended industrial temperature range of -40°C to +125°C.
- How does the power shutdown feature work on the AD5207?
The SHDN pin forces an open circuit on Terminal A and shorts the wiper to Terminal B, achieving a microwatt power shutdown state. The previous resistance values are maintained during shutdown.
- What type of digital interface does the AD5207 use?
The AD5207 uses a 3-wire SPI compatible serial input control interface with clock, chip select, and serial data input pins.
- Is the AD5207 protected against ESD?
Yes, the digital inputs of the AD5207 are protected with a series input resistor and parallel Zener ESD structure.
- What package type is the AD5207 available in?
The AD5207 is available in a 1.1mm thin TSSOP-14 package.
- Can the AD5207 update both channels simultaneously?
No, the AD5207 cannot update both channels simultaneously; two separate 10-bit data words must be clocked in to change both VR settings.
- What is the power supply range for the AD5207?
The AD5207 can operate with a single supply from +2.7V to +5.5V or a dual supply of ±2.7V.
- What are some common applications of the AD5207?
The AD5207 is used in mechanical potentiometer replacement, stereo channel audio level control, instrumentation, programmable voltage to current conversion, programmable filters and delays, line impedance matching, and automotive electronics adjustments).
