Overview
The AD5247BKSZ50-RL7, produced by Analog Devices Inc., is a digital potentiometer that offers a compact and versatile solution for 128-position adjustment applications. This device functions similarly to a mechanical potentiometer or a variable resistor, providing high accuracy and stability in variable resistance adjustments. It operates on a single supply voltage ranging from 2.7 V to 5.5 V, making it suitable for battery-powered applications and other low-power systems. The device is packaged in a 6-lead SC70 package, measuring 2 mm × 2.1 mm, and is I2C-compatible, allowing for easy control and readback of the wiper settings through a digital interface.
Key Specifications
| Parameter | Symbol | Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|---|
| Power Supply Range | VDD | 2.7 | 5.5 | V | ||
| Supply Current | IDD | VDD = 3.3 V | 0.9 | 2 | µA | |
| Operating Temperature Range | TA | -40 | 125 | °C | ||
| End-to-End Resistance | RAB | 50 | 50 | kΩ | ||
| Resistor Differential Nonlinearity | R-DNL | VA = no connect | -1 | ±0.1 | +1 | LSB |
| Input Logic High | VIH | VDD = 5 V | 2.4 | V | ||
| Input Logic Low | VIL | VDD = 5 V | 0.8 | V | ||
| Bandwidth –3 dB | BW | RAB = 50 kΩ, code = 0x40 | 100 | kHz |
Key Features
- 128-position digital potentiometer with I2C-compatible interface for wiper control and readback.
- Single-supply operation from 2.7 V to 5.5 V, suitable for battery-powered applications.
- Low power consumption: typical supply current of 0.9 µA at 3.3 V.
- Wide operating temperature range: -40°C to +125°C.
- Low temperature coefficient: 45 ppm/°C in rheostat mode.
- Available in four different end-to-end resistance values: 5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- Compact 6-lead SC70 package measuring 2 mm × 2.1 mm.
Applications
- Mechanical potentiometer replacement in new designs.
- Transducer adjustment for pressure, temperature, position, chemical, and optical sensors.
- RF amplifier-biasing.
- LCD brightness and contrast adjustment.
- Automotive electronics adjustment.
- Gain control and offset adjustment.
Q & A
- What is the operating voltage range of the AD5247BKSZ50-RL7?
The AD5247BKSZ50-RL7 operates on a single supply voltage ranging from 2.7 V to 5.5 V.
- What is the typical supply current of the AD5247BKSZ50-RL7 at 3.3 V?
The typical supply current is 0.9 µA at 3.3 V.
- What are the available end-to-end resistance values for the AD5247?
The AD5247 is available in four different end-to-end resistance values: 5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the temperature coefficient of the AD5247 in rheostat mode?
The temperature coefficient is 45 ppm/°C in rheostat mode.
- What interface does the AD5247 use for wiper control and readback?
The AD5247 uses an I2C-compatible interface for wiper control and readback.
- What is the operating temperature range of the AD5247BKSZ50-RL7?
The operating temperature range is -40°C to +125°C.
- What are some common applications of the AD5247?
Common applications include mechanical potentiometer replacement, transducer adjustment, RF amplifier-biasing, LCD brightness and contrast adjustment, automotive electronics adjustment, and gain control and offset adjustment.
- What is the package type and size of the AD5247BKSZ50-RL7?
The device is packaged in a 6-lead SC70 package measuring 2 mm × 2.1 mm.
- How many positions does the digital potentiometer of the AD5247 have?
The digital potentiometer has 128 positions.
- What is the bandwidth of the AD5247BKSZ50-RL7 at -3 dB?
The bandwidth at -3 dB is 100 kHz for the 50 kΩ version.
