Overview
The AD5245BRJ10-RL7 is a 256-position digitally controlled variable resistor (VR) or digital potentiometer produced by Analog Devices Inc. This device is designed to provide a compact and reliable solution for various adjustment applications, replacing traditional mechanical potentiometers with enhanced resolution and solid-state reliability. It operates within a single supply voltage range of 2.7 V to 5.5 V and is packaged in an 8-lead SOT-23, making it suitable for space-constrained designs.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| End-to-end Resistance | - | - | 10 kΩ | - |
| Number of Positions | - | - | 256 | - |
| Operating Supply Voltage | 2.7 V | - | 5.5 V | V |
| Operating Supply Current | - | - | 8 µA | µA |
| Operating Temperature Range | -40°C | - | +125°C | °C |
| Temperature Coefficient | - | - | 45 ppm/°C | ppm/°C |
| Differential Nonlinearity (DNL) | -1.5 LSB | - | +1.5 LSB | LSB |
| Integral Nonlinearity (INL) | -1.5 LSB | - | +1.5 LSB | LSB |
| Full-Scale Error | -6 LSB | - | +2.5 LSB | LSB |
| Zero-Scale Error | 0 LSB | - | +6 LSB | LSB |
| Shutdown Supply Current | - | - | 1 µA | µA |
| Digital Interface | - | - | I2C | - |
Key Features
- 256-position digital potentiometer with end-to-end resistances of 10 kΩ, 50 kΩ, 100 kΩ, and other configurations.
- Compact SOT-23-8 package (2.9 mm × 3 mm).
- Fast settling time: 5 µs typical on power-up.
- Full read/write of wiper register through 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.
- Wide operating temperature range: –40°C to +125°C.
- Low temperature coefficient: 45 ppm/°C.
- Command bits for midscale reset and shutdown.
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 AD5245BRJ10-RL7?
The AD5245BRJ10-RL7 is a 256-position digitally controlled variable resistor or digital potentiometer from Analog Devices Inc.
- What is the operating supply voltage range of the AD5245BRJ10-RL7?
The device operates within a single supply voltage range of 2.7 V to 5.5 V.
- What is the package type of the AD5245BRJ10-RL7?
The device is packaged in an 8-lead SOT-23.
- What is the temperature coefficient of the AD5245BRJ10-RL7?
The temperature coefficient is 45 ppm/°C.
- How many positions does the AD5245BRJ10-RL7 have?
The device has 256 positions.
- What is the digital interface used by the AD5245BRJ10-RL7?
The device uses an I2C-compatible digital interface.
- What are some common applications of the AD5245BRJ10-RL7?
Common applications include mechanical potentiometer replacement, LCD panel adjustments, transducer adjustments, RF amplifier biasing, and automotive electronics.
- What is the power consumption of the AD5245BRJ10-RL7?
The device consumes less than 8 µA of current.
- Can multiple AD5245BRJ10-RL7 devices be addressed on the same bus?
Yes, the device has an extra package address decode pin (AD0) that allows up to two devices to be placed on the same bus.
- What is the operating temperature range of the AD5245BRJ10-RL7?
The device operates from –40°C to +125°C.
- Is there an evaluation board available for the AD5245BRJ10-RL7?
Yes, an evaluation board is available for the AD5245BRJ10-RL7.
