Overview
The AD5161BRMZ50, produced by Analog Devices Inc., is a digital potentiometer designed to replace mechanical potentiometers or variable resistors in various applications. This device offers enhanced resolution, solid-state reliability, and superior low temperature coefficient performance. It operates on a single supply voltage ranging from 2.7 V to 5.5 V, making it suitable for battery-powered applications. The compact MSOP-10 package (3 mm × 4.9 mm) and low power consumption of 8 μA further enhance its usability in a wide range of designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Positions | 256 | - |
| End-to-End Resistance | 50 kΩ | Ω |
| Package Type | MSOP-10 | - |
| Interface | SPI/I2C Selectable | - |
| Supply Voltage | 2.7 V to 5.5 V | V |
| Temperature Coefficient | 45 ppm/°C | ppm/°C |
| Current Consumption | 8 μA | μA |
| Operating Temperature | −40°C to +125°C | °C |
| Bandwidth (−3dB) | 100 kHz (at 50 kΩ) | kHz |
| Total Harmonic Distortion | 0.05 % (at 1 kHz, 1 V rms) | % |
| Settling Time | 2 μs (±1 LSB error band) | μs |
| Resistor Noise Voltage Density | 9 nV/√Hz (at 5 kΩ) | nV/√Hz |
Key Features
- Pin selectable SPI or I2C compatible digital interface
- Full read/write of wiper register
- Power-on preset to midscale
- SDO output allows multiple device daisy-chaining in SPI mode
- Address pin AD0 for up to two devices on the same I2C bus
- Command bits for resetting wiper position to midscale or shutting down the device
- Low power consumption and wide operating temperature range
- 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 operating voltage range of the AD5161BRMZ50?
The AD5161BRMZ50 operates on a single supply voltage ranging from 2.7 V to 5.5 V.
- What is the number of positions available on the AD5161BRMZ50?
The device has 256 positions.
- What types of interfaces does the AD5161BRMZ50 support?
The device supports both SPI and I2C interfaces, selectable via a pin.
- What is the temperature coefficient of the AD5161BRMZ50?
The temperature coefficient is 45 ppm/°C.
- How much current does the AD5161BRMZ50 consume?
The device consumes 8 μA of current.
- What is the operating temperature range of the AD5161BRMZ50?
The device operates from −40°C to +125°C.
- Can multiple AD5161BRMZ50 devices be daisy-chained?
Yes, multiple devices can be daisy-chained using the SDO output in SPI mode.
- What is the bandwidth of the AD5161BRMZ50 at 50 kΩ?
The bandwidth is 100 kHz at 50 kΩ.
- What is the total harmonic distortion of the AD5161BRMZ50?
The total harmonic distortion is 0.05 % at 1 kHz, 1 V rms.
- What is the settling time of the AD5161BRMZ50?
The settling time is 2 μs within a ±1 LSB error band.
