Overview
The AD5245BRJZ50-RL7, produced by Analog Devices Inc., is a 256-position digital potentiometer that offers a compact and reliable solution for various adjustment applications. This device functions similarly to mechanical potentiometers or variable resistors but with enhanced resolution, solid-state reliability, and a superior low temperature coefficient performance. It operates within a single supply range 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 |
|---|---|---|---|---|---|---|
| Power Supply Range | VDD | 2.7 | 5.5 | V | ||
| Supply Current | IDD | VIH = 5 V or VIL = 0 V | 3 | 8 | µA | |
| Operating Temperature Range | –40 | +125 | °C | |||
| Maximum Junction Temperature | TJMAX | 150 | °C | |||
| End-to-end Resistance | 50 kΩ | Ω | ||||
| Bandwidth –3 dB | BW_5K | RAB = 5 kΩ, code = midscale | 1.2 | MHz | ||
| Total Harmonic Distortion | THDW | VA = 1 V rms, VB = 0 V, f = 1 kHz | 0.1 | % | ||
| Interface | I2C |
Key Features
- 256-position digital potentiometer with end-to-end resistance options of 5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ.
- Compact SOT-23-8 (2.9 mm × 3 mm) package.
- Fast settling time: 5 µs typical on power-up.
- Full read/write of wiper register through an I2C-compatible digital interface.
- Power-on preset to midscale.
- Extra package address decode pin AD0 for multiple device addressing.
- Single supply operation: 2.7 V to 5.5 V.
- Low power consumption: IDD = 8 µA.
- Low temperature coefficient: 45 ppm/°C.
- Wide operating temperature range: –40°C to +125°C.
- Command bits for midscale reset and shutdown to zero power consumption.
Applications
- Mechanical potentiometer replacement in new designs.
- LCD panel VCOM adjustment, brightness, and 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-RL7 used for?
The AD5245BRJZ50-RL7 is used as a digital potentiometer, replacing mechanical potentiometers or variable resistors in various applications, including LCD panel adjustments, sensor transducer adjustments, and automotive electronics.
- What is the operating voltage range of the AD5245BRJZ50-RL7?
The device operates within a single supply range of 2.7 V to 5.5 V.
- What is the typical supply current of the AD5245BRJZ50-RL7?
The typical supply current is 3 µA to 8 µA.
- What interface does the AD5245BRJZ50-RL7 use?
The device uses an I2C-compatible digital interface.
- What is the end-to-end resistance of the AD5245BRJZ50-RL7?
The end-to-end resistance for this specific model is 50 kΩ.
- What is the temperature coefficient of the AD5245BRJZ50-RL7?
The temperature coefficient is 45 ppm/°C.
- Can multiple AD5245 devices be placed on the same bus?
- What is the settling time of the AD5245BRJZ50-RL7 on power-up?
The settling time is typically 5 µs on power-up.
- What are the command bits used for in the AD5245BRJZ50-RL7?
The command bits are used to reset the wiper position to midscale or to shut down the device into a state of zero power consumption.
- What is the maximum junction temperature of the AD5245BRJZ50-RL7?
The maximum junction temperature is 150°C.
- Is the AD5245BRJZ50-RL7 suitable for portable battery-operated applications?
