Overview
The AD5247BKSZ100-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 scenarios. The device is packaged in a 6-lead SC70 package, measuring 2 mm × 2.1 mm, and is designed for use in a wide operating temperature range of −40°C to +125°C.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Power Supply Range | VDD | 2.7 | 5.5 | V | ||
| Supply Current | IDD | VDD = 3.3 V | 0.9 | 2 | µA | |
| End-to-End Resistance | RAB | 100 | 100 | kΩ | ||
| Resistor Differential Nonlinearity | R-DNL | VA = no connect | -1 | ±0.1 | +1 | LSB |
| Resistor Integral Nonlinearity | R-INL | VA = no connect | 0 | 0.5 | 1 | LSB |
| Input Logic High | VIH | VDD = 5 V | 2.4 | V | ||
| Input Logic Low | VIL | VDD = 5 V | 0.8 | V | ||
| Output Logic Low (SDA) | VOL | IOL = 3 mA | 0.4 | 0.6 | V | |
| Bandwidth –3 dB | BW | RAB = 100 kΩ, code = 0x40 | 40 | kHz |
Key Features
- I2C-Compatible Digital Interface: Allows for control and readback of the wiper register through a digital interface.
- Low Temperature Coefficient: Ensures high accuracy and stability with a temperature coefficient of 45 ppm/°C.
- Low Power Consumption: Typical supply current of 0.9 µA at 3.3 V, making it suitable for battery-powered applications.
- Compact Packaging: 6-lead SC70 package measuring 2 mm × 2.1 mm.
- Wide Operating Temperature Range: From −40°C to +125°C.
- Multiple End-to-End Resistance Values: Available in 5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ options.
Applications
- Mechanical Potentiometer Replacement: In new designs where digital control is preferred.
- Transducer Adjustment: For pressure, temperature, position, chemical, and optical sensors.
- RF Amplifier-Biasing: Adjusting bias levels in RF amplifiers.
- LCD Brightness and Contrast Adjustment: Controlling display settings in LCDs.
- Automotive Electronics Adjustment: Various adjustments in automotive systems.
- Gain Control and Offset Adjustment: In electronic circuits requiring precise gain and offset adjustments.
Q & A
- What is the primary function of the AD5247BKSZ100-RL7?
The AD5247BKSZ100-RL7 functions as a digital potentiometer, providing the same electronic adjustment as a mechanical potentiometer or a variable resistor. - What is the operating voltage range of the AD5247BKSZ100-RL7?
The device operates on a single supply voltage ranging from 2.7 V to 5.5 V. - What is the typical supply current of the AD5247BKSZ100-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 5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ options. - What is the temperature coefficient of the AD5247BKSZ100-RL7?
The temperature coefficient is 45 ppm/°C. - What interface does the AD5247BKSZ100-RL7 use for control and readback?
The device uses an I2C-compatible digital interface. - What is the operating temperature range of the AD5247BKSZ100-RL7?
The device operates from −40°C to +125°C. - What are some common applications of the AD5247BKSZ100-RL7?
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 AD5247BKSZ100-RL7?
The device is packaged in a 6-lead SC70 package measuring 2 mm × 2.1 mm. - How many positions can the wiper be adjusted to in the AD5247BKSZ100-RL7?
The wiper can be adjusted to 128 positions.
