Overview
The AD5231BRU100, manufactured by Analog Devices Inc., is a nonvolatile memory, 1024-position digital potentiometer. This device is designed to operate as a true variable resistor replacement for analog signals, offering enhanced resolution, solid-state reliability, and remote controllability. It features a 3-wire SPI-compatible serial interface and can operate on a single supply from 2.7 V to 5.5 V or a dual supply from ±2.25 V to ±2.75 V. The AD5231BRU100 is housed in a 16-lead TSSOP package and is guaranteed to operate over the extended industrial temperature range.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Number of Positions | - | - | - | - | 1024 | - |
| Resistance | - | - | - | - | 100 kΩ | - |
| Supply Voltage (Single) | VDD | VSS = 0 V | 2.7 | - | 5.5 | V |
| Supply Voltage (Dual) | VDD/VSS | - | ±2.25 | - | ±2.75 | V |
| Interface | - | - | - | - | SPI-compatible | - |
| Memory Type | - | - | - | - | Non-Volatile | - |
| Temperature Range | TA | - | -40°C | - | +85°C | - |
| Package | - | - | - | - | 16-lead TSSOP | - |
Key Features
- SPI-compatible serial interface for 16 modes of operation and adjustment.
- 1024-step resolution with linear-step increment or decrement commands.
- ±6 dB/step log taper adjustment capability.
- 28 bytes of extra nonvolatile memory for user-defined data.
- 100-year typical data retention at TA = 55°C.
- Scratchpad programming, memory storing and restoring, and wiper setting readback.
- Cascade pin for multi-device operation.
- Temperature coefficient of 600 ppm/°C.
Applications
- Mechanical potentiometer replacement.
- Instrumentation: gain and offset adjustment.
- Programmable voltage to current conversion.
- Programmable filters, delays, and time constants.
- Programmable power supply.
- Low resolution DAC replacement.
- Sensor calibration.
Q & A
- What is the AD5231BRU100 used for?
The AD5231BRU100 is used as a digital potentiometer to replace mechanical potentiometers in various applications, including instrumentation, programmable voltage to current conversion, and sensor calibration.
- What is the resolution of the AD5231BRU100?
The AD5231BRU100 has a resolution of 1024 positions.
- What type of interface does the AD5231BRU100 use?
The AD5231BRU100 uses an SPI-compatible serial interface.
- What is the operating voltage range of the AD5231BRU100?
The AD5231BRU100 operates on a single supply from 2.7 V to 5.5 V or a dual supply from ±2.25 V to ±2.75 V.
- What type of memory does the AD5231BRU100 have?
The AD5231BRU100 has nonvolatile memory (EEMEM) with 28 bytes for user-defined data.
- What is the typical data retention time for the AD5231BRU100?
The typical data retention time is 100 years at TA = 55°C.
- What is the package type of the AD5231BRU100?
The AD5231BRU100 is housed in a 16-lead TSSOP package.
- What are some common applications of the AD5231BRU100?
Common applications include mechanical potentiometer replacement, instrumentation, programmable voltage to current conversion, and sensor calibration.
- Can the AD5231BRU100 be used in multi-device configurations?
Yes, the AD5231BRU100 has a cascade pin that allows for multi-device operation.
- What is the temperature coefficient of the AD5231BRU100?
The temperature coefficient is 600 ppm/°C.
