## Technical Overview of AD5246BKSZ100-R2 The **AD5246BKSZ100-R2** is a high-resolution, I2C-compatible digital potentiometer manufactured by Analog Devices. It is designed to replace mechanical potentiometers and variable resistors in space-constrained applications. --- ### 1. Key Specifications The following table highlights the primary electrical and physical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Analog Devices Inc. | | **Resistance** | 100 kΩ | | **Resolution** | 128 Taps (7-bit) | | **Interface** | I2C (2-wire) | | **Supply Voltage (Vdd)** | 2.7V to 5.5V | | **Package / Case** | SC-70-6 (Ultra-compact) | | **Tolerance** | ±20% | | **Temperature Coefficient** | 35 ppm/°C (typical) | --- ### 2. Functional Description The AD5246 acts as a variable resistor where the wiper position is controlled digitally via the I2C bus. - **Digital Control:** Unlike manual trimpots, this device allows for automated calibration and adjustments via a microcontroller (MCU). - **Power-on Reset:** Upon power-up, the wiper is automatically preset to the mid-scale position (Code 0x40). - **Volatile Memory:** The device uses volatile registers, meaning it does not "remember" its position after power is removed unless programmed by the MCU during the boot sequence. --- ### 3. Pin Configuration The SC-70-6 package is extremely small, featuring 6 pins: 1. **VDD:** Positive Power Supply. 2. **GND:** Ground. 3. **SCL:** Serial Clock Input. 4. **SDA:** Serial Data Input/Output. 5. **W:** Wiper Terminal. 6. **B:** Bottom Terminal of the Resistor. *(Note: The "A" terminal is internally connected to VDD in the AD5246 series, making it a rheostat configuration).* --- ### 4. Typical Applications * **LCD Contrast Control:** Adjusting the bias voltage of small displays. * **Programmable Filters:** Tuning the cutoff frequency of analog filters. * **Sensor Calibration:** Automated offset and gain adjustment for sensors. * **Volume Control:** Digital audio level attenuation. --- ### 5. Part Number Breakdown * **AD5246:** Base Model Number. * **BKSZ:** Package Code (SC-70). * **100:** Nominal Resistance (100 kΩ). * **R2:** Reel size/Quantity (typically 250 units on a 7-inch reel).