Overview
The AD5245BRJZ50-R2, produced by Analog Devices Inc., is a 256-position I2C-compatible digital potentiometer. This device is designed to replace mechanical potentiometers or variable resistors, offering enhanced resolution, solid-state reliability, and superior low temperature coefficient performance. It is packaged in a compact 8-lead SOT-23 package, measuring 2.9 mm × 3 mm. The AD5245 operates from a single supply voltage of 2.7 V to 5.5 V and consumes less than 8 µA, making it suitable for portable battery-operated applications.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| End-to-end Resistance | - | - | - | - | 50 kΩ | - |
| Power Supply Range | VDD | - | 2.7 V | - | 5.5 V | V |
| Supply Current | IDD | VIH = 5 V or VIL = 0 V | - | 8 µA | - | µA |
| Operating Temperature Range | - | - | -40°C | - | +125°C | °C |
| Temperature Coefficient | - | - | - | - | 45 ppm/°C | - |
| Bandwidth (-3 dB) | BW_5K | RAB = 5 kΩ, code = midscale | - | 1.2 MHz | - | MHz |
| Total Harmonic Distortion | THDW | VA = 1 V rms, VB = 0 V, f = 1 kHz | - | 0.1 % | - | % |
Key Features
- 256-position digital potentiometer with I2C-compatible digital interface
- Compact SOT-23-8 package (2.9 mm × 3 mm)
- Single supply operation: 2.7 V to 5.5 V
- Low power consumption: IDD = 8 µA
- Wide operating temperature range: –40°C to +125°C
- Fast settling time: tS = 5 µs typ on power-up
- Full read/write of wiper register
- Power-on preset to midscale
- Extra package address decode pin AD0 for multiple device addressing
Applications
- Mechanical potentiometer replacement in new designs
- LCD panel VCOM adjustment and brightness/contrast control
- Transducer adjustment for pressure, temperature, position, chemical, and optical sensors
- RF amplifier biasing
- Automotive electronics adjustment
- Gain control and offset adjustment
Q & A
- What is the AD5245BRJZ50-R2 used for? The AD5245BRJZ50-R2 is used as a digital potentiometer to replace mechanical potentiometers or variable resistors in various applications.
- What is the operating voltage range of the AD5245BRJZ50-R2? The device operates from a single supply voltage of 2.7 V to 5.5 V.
- How much current does the AD5245BRJZ50-R2 consume? The device consumes less than 8 µA.
- What is the temperature coefficient of the AD5245BRJZ50-R2? The temperature coefficient is 45 ppm/°C.
- What is the bandwidth of the AD5245BRJZ50-R2? The bandwidth is 1.2 MHz at RAB = 5 kΩ and code = midscale.
- Can multiple AD5245 devices be used on the same I2C bus? Yes, the AD0 pin allows for multiple device addressing on the same bus.
- What is the settling time of the AD5245BRJZ50-R2 on power-up? The settling time is typically 5 µs on power-up.
- What are some common applications of the AD5245BRJZ50-R2? Common applications include LCD panel adjustments, transducer adjustments, RF amplifier biasing, and automotive electronics adjustments.
- What package type is the AD5245BRJZ50-R2 available in? The device is packaged in an 8-lead SOT-23 package.
- Is an evaluation board available for the AD5245BRJZ50-R2? Yes, an evaluation board is available for the AD5245.
