Overview
The AD5263BRUZ20, manufactured by Analog Devices Inc., is a quad-channel, 256-position digital potentiometer. It is the industry’s first device of its kind with a selectable digital interface, allowing it to perform the same electronic adjustment functions as mechanical potentiometers or variable resistors but with enhanced resolution, solid-state reliability, and superior low temperature coefficient performance. Each channel offers a completely programmable value of resistance between the A terminal and the wiper or between the B terminal and the wiper. The device operates over a wide temperature range of –40°C to +125°C and can be powered from +4.5 V to +15 V or at ±5 V.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 4 | - |
| Positions per Channel | 256 | - |
| End-to-End Resistance | 20 kΩ, 50 kΩ, 200 kΩ | Ω |
| Temperature Coefficient (Rheostat Mode) | 30 ppm/°C | ppm/°C |
| Temperature Coefficient (Voltage Divider Mode) | 5 ppm/°C | ppm/°C |
| Operating Temperature Range | –40°C to +125°C | °C |
| Single Supply Voltage Range | +4.5 V to +15 V | V |
| Dual Supply Voltage Range | ±5 V | V |
| Interface | 3-wire SPI or 2-wire I2C-compatible | - |
| Package Type | 24-lead TSSOP | - |
Key Features
- Selectable digital interface: 3-wire SPI or 2-wire I2C-compatible
- Completely programmable resistance between A terminal and wiper or B terminal and wiper
- Fixed A-to-B terminal resistance with nominal temperature coefficient of ±30 ppm/°C and ±1% channel-to-channel matching tolerance
- Power-on preset to midscale
- Additional programmable logic outputs in I2C mode to drive digital loads, logic gates, and analog switches
- Wide operating temperature range of –40°C to +125°C
- Low power consumption and high reliability
Applications
- Mechanical potentiometer replacement
- Optical network adjustment
- Instrumentation: gain, offset adjustment
- Stereo channel audio level control
- Automotive electronics adjustment
- Programmable power supply
- Programmable filters, delays, time constants
- Line impedance matching
- Low resolution DAC/trimmer replacement
- Base station power amp biasing
- Sensor calibration
Q & A
- What is the AD5263BRUZ20 used for?
The AD5263BRUZ20 is used as a digital potentiometer to replace mechanical potentiometers or variable resistors in various applications, including instrumentation, audio level control, and automotive electronics adjustment.
- What are the key interfaces supported by the AD5263BRUZ20?
The device supports both 3-wire SPI and 2-wire I2C-compatible interfaces.
- What is the operating temperature range of the AD5263BRUZ20?
The device operates over a temperature range of –40°C to +125°C.
- What are the available end-to-end resistance values for the AD5263BRUZ20?
The end-to-end resistance values are 20 kΩ, 50 kΩ, and 200 kΩ.
- How many channels does the AD5263BRUZ20 have?
The device has four channels.
- What is the power-on default state of the wiper position?
The wiper position presets to midscale upon power-on.
- Can the AD5263BRUZ20 be used in automotive applications?
Yes, it is suitable for automotive electronics adjustment and operates over the automotive temperature range.
- What package type is the AD5263BRUZ20 available in?
The device is available in a 24-lead TSSOP package.
- What is the temperature coefficient of the AD5263BRUZ20 in rheostat mode?
The temperature coefficient in rheostat mode is 30 ppm/°C.
- Can the AD5263BRUZ20 be used for sensor calibration?
Yes, it can be used for sensor calibration due to its precise and programmable resistance settings.
