The **AD5247BKS5-R2** is a specific model of a digital potentiometer (digipot) manufactured by Analog Devices. It is designed to replace mechanical potentiometers with a digitally controlled integrated circuit, allowing for precise, automated adjustments of resistance. --- ## 1. Core Technical Specifications The following table summarizes the key electrical and physical characteristics of the AD5247BKS5-R2: | Parameter | Specification | | :--- | :--- | | **Resistance (End-to-End)** | 5 kΩ | | **Interface** | I²C (2-wire serial) | | **Number of Positions** | 128 Taps (7-bit resolution) | | **Supply Voltage (Vdd)** | 2.7V to 5.5V | | **Package Type** | SC-70-6 (6-lead Small Outline Transistor) | | **Memory Type** | Volatile (Resets to mid-scale upon power-up) | | **Operating Temperature** | -40°C to +125°C | --- ## 2. Pin Configuration The AD5247BKS5-R2 uses a compact 6-pin layout. Below is the functional mapping for each pin: 1. **VDD**: Positive power supply (2.7V to 5.5V). 2. **GND**: Ground reference. 3. **SCL**: Serial Clock Input for I²C communication. 4. **SDA**: Serial Data I/O for I²C communication. 5. **W (Wiper)**: The "middle" terminal of the potentiometer, whose position is controlled by the digital value. 6. **B**: The "bottom" terminal of the resistor string. (Note: The AD5247 is a rheostat configuration, meaning it typically connects between W and B). --- ## 3. Key Features & Functionality ### I²C Digital Control Unlike analog potentiometers turned by hand, this device is adjusted via software commands. It uses the I²C protocol, which allows multiple devices to be controlled using only two wires (SDA and SCL). ### Volatile Memory The "wiper" position is stored in volatile registers. When the device loses power, it forgets its position. Upon a cold boot, the device automatically resets the wiper to **mid-scale** (position 64). ### Low Power Consumption The device is designed for battery-operated applications, consuming very low current (typically less than 5 µA) when the digital interface is idle. --- ## 4. Common Applications * **LCD Contrast Adjustment**: Controlling the bias voltage for displays. * **Programmable Filters/Gain**: Adjusting the gain of an operational amplifier (Op-Amp) circuit. * **Sensor Calibration**: Digitally trimming the offset or sensitivity of sensors. * **Power Supply Adjustment**: Fine-tuning the output voltage of a DC-DC converter. ---