Overview
The AD5231BRUZ100-RL7, produced by Analog Devices Inc., is a nonvolatile memory, digitally controlled potentiometer with 1024-step resolution. 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 standard 3-wire SPI-compatible serial interface and supports both single-supply (3 V to 5 V) and dual-supply (±2.5 V) operations. The AD5231BRUZ100-RL7 is packaged in a 16-lead TSSOP and is guaranteed to operate over the extended industrial temperature range of −40°C to +85°C.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Terminal Resistance | - | - | 10 kΩ, 50 kΩ, 100 kΩ | - | - | - |
| Resolution | - | - | 1024 steps | - | - | - |
| Single-Supply Power Range | VDD | VSS = 0 V | 2.7 | - | 5.5 | V |
| Dual-Supply Power Range | VDD/VSS | - | ±2.25 | - | ±2.75 | V |
| Positive Supply Current | IDD | VIH = VDD or VIL = GND | 2.7 | - | 10 | µA |
| Negative Supply Current | ISS | VIH = VDD or VIL = GND, VDD = +2.5 V, VSS = −2.5 V | 0.5 | - | 10 | µA |
| EEMEM Store Mode Current | IDD (store) | VIH = VDD or VIL = GND, VSS = GND, ISS ≈ 0 | - | - | 40 | mA |
| Clock Cycle Time | tCYC | - | 20 | - | - | ns |
| CS Setup Time | t2 | - | 10 | - | - | ns |
Key Features
- SPI-compatible serial interface for 16 modes of operation and adjustment, including scratchpad programming, memory storing and restoring, increment/decrement, and ±6 dB/step log taper adjustment.
- Nonvolatile memory maintains wiper setting with 100-year typical data retention at TA = 55°C.
- Power-on refresh with EEMEM setting and EEMEM restore time of 140 μs typical.
- Full monotonic operation and permanent memory write protection.
- Extra 28 bytes of nonvolatile memory for user-defined data.
- Wiper setting readback capability.
- Operating temperature range of −40°C to +85°C.
Applications
- Mechanical potentiometer replacement.
- Instrumentation: gain, offset adjustment.
- Programmable voltage to current conversion.
- Programmable filters, delays, time constants.
- Programmable power supply.
- Low resolution DAC replacement.
- Sensor calibration).
Q & A
- What is the resolution of the AD5231BRUZ100-RL7 digital potentiometer?
The AD5231BRUZ100-RL7 has a resolution of 1024 steps).
- What are the power supply options for the AD5231BRUZ100-RL7?
The device can operate with a single supply from 3 V to 5 V or with a dual supply of ±2.5 V).
- What is the purpose of the nonvolatile memory in the AD5231BRUZ100-RL7?
The nonvolatile memory maintains the wiper setting even after power is turned off, with a typical data retention of 100 years at TA = 55°C).
- How does the AD5231BRUZ100-RL7 communicate with external devices?
The device uses a standard 3-wire SPI-compatible serial interface for communication).
- What are some common applications of the AD5231BRUZ100-RL7?
Common applications include mechanical potentiometer replacement, instrumentation for gain and offset adjustment, programmable voltage to current conversion, and sensor calibration).
- What is the operating temperature range of the AD5231BRUZ100-RL7?
The device operates over an extended industrial temperature range of −40°C to +85°C).
- Does the AD5231BRUZ100-RL7 have any additional memory for user-defined data?
Yes, the device has 28 bytes of extra nonvolatile memory for user-defined data).
- How long does it take to store data in the EEMEM of the AD5231BRUZ100-RL7?
The storing of EEMEM data takes approximately 25 ms).
- Is the AD5231BRUZ100-RL7 protected against unintended memory writes?
Yes, the device has permanent memory write protection).
- What package type is the AD5231BRUZ100-RL7 available in?
The device is packaged in a 16-lead TSSOP).
