Overview
The AD5161BRM50-RL7 is a digital potentiometer produced by Analog Devices Inc. This component 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 10-lead MSOP (3 mm × 4.9 mm) and operates with a single supply voltage ranging from 2.7 V to 5.5 V.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| End-to-end Resistance | 50 kΩ | Ω |
| Number of Positions | 256 | - |
| Interface | SPI/I2C compatible | - |
| Power Supply Voltage | 2.7 V to 5.5 V | V |
| Operating Temperature | −40°C to +125°C | °C |
| Temperature Coefficient | 45 ppm/°C | ppm/°C |
| Wiper Resistance | 50 to 120 Ω | Ω |
| Differential Nonlinearity (DNL) | −1.5 to +1.5 LSB | LSB |
| Integral Nonlinearity (INL) | −1.5 to +1.5 LSB | LSB |
| Bandwidth (−3dB) | 100 kHz (for 50 kΩ) | kHz |
| Total Harmonic Distortion (THD) | 0.05 % | % |
| Settling Time | 2 µs | µs |
Key Features
- Compact MSOP-10 package (3 mm × 4.9 mm)
- Pin selectable SPI/I2C compatible interface
- Extra package address decode pin AD0 for I2C mode
- Full read/write of wiper register
- Power-on preset to midscale
- Low power consumption (IDD = 8 μA)
- Wide operating temperature range (−40°C to +125°C)
- SDO output allows multiple device daisy-chaining in SPI mode
- Evaluation board available
Applications
- Mechanical potentiometer replacement in new designs
- Transducer adjustment of pressure, temperature, position, chemical, and optical sensors
- RF amplifier biasing
- Gain control and offset adjustment
Q & A
- What is the primary function of the AD5161BRM50-RL7?
The AD5161BRM50-RL7 is a digital potentiometer that performs the same electronic adjustment function as mechanical potentiometers or variable resistors.
- What are the available end-to-end resistance values for the AD5161?
The AD5161 is available with end-to-end resistances of 5 kΩ, 10 kΩ, 50 kΩ, and 100 kΩ. The AD5161BRM50-RL7 specifically has a 50 kΩ end-to-end resistance.
- What interface options are available for the AD5161?
The AD5161 offers pin selectable SPI and I2C compatible digital interfaces.
- What is the operating temperature range of the AD5161BRM50-RL7?
The operating temperature range is −40°C to +125°C.
- How many positions does the AD5161 digital potentiometer have?
The AD5161 has 256 positions.
- What is the typical power consumption of the AD5161?
The typical power consumption is less than 5 μA.
- Can multiple AD5161 devices be daisy-chained?
- What is the temperature coefficient of the AD5161?
The temperature coefficient is 45 ppm/°C.
- What is the settling time of the AD5161?
The settling time is 2 µs.
- What are some common applications of the AD5161?
