Overview
The AD5231BRU10-REEL7, produced by Analog Devices Inc., is a nonvolatile memory, digitally controlled 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 1024-step resolution, making it suitable for a wide range of applications where precise electronic adjustments are necessary.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Resolution | - | - | - | 1024 | - | Positions |
| Terminal Resistance | - | - | 10 kΩ, 50 kΩ, 100 kΩ | - | - | Ω |
| Power Supply Range | VDD/VSS | Single-Supply | 2.7 | - | 5.5 | V |
| Power Supply Range | VDD/VSS | Dual-Supply | ±2.25 | - | ±2.75 | V |
| Operating Temperature Range | TA | - | -40°C | - | +85°C | °C |
| Input Current | IIL | VIN = 0 V or VDD | - | - | ±2.5 µA | µA |
| Output Current | IO1, IO2 | VDD = 5 V, VSS = 0 V, TA = 25°C | - | - | 50 mA | mA |
| EEMEM Store Mode Current | IDD (store) | VIH = VDD or VIL = GND, VSS = GND, ISS ≈ 0 | - | - | 40 mA | mA |
Key Features
- Nonvolatile Memory: Maintains wiper setting even after power-off.
- 1024-Position Resolution: High resolution for precise adjustments.
- Power-on Refresh with EEMEM Setting: Automatically restores the wiper position from EEMEM during power-on.
- EEMEM Restore Time: Approximately 140 μs typical.
- Full Monotonic Operation: Ensures consistent and predictable performance.
- Linear and Log Taper Adjustments: Includes predefined linear increment/decrement and ±6 dB/step log taper increment/decrement instructions.
- SPI-Compatible Serial Interface: Standard 3-wire serial interface for versatile programming.
- Wiper Setting Readback: Allows for the current wiper position to be read back.
- Extra EEMEM for User-Defined Information: Can store additional data such as memory for other components, look-up tables, or system identification information.
- Permanent Memory Write Protection: WP function protects EEMEM contents.
Applications
- Mechanical Potentiometer Replacement: Offers solid-state reliability and remote controllability.
- Instrumentation: Suitable for gain and offset adjustments.
- Programmable Voltage to Current Conversion: Can be used in various conversion applications.
- Programmable Filters, Delays, Time Constants: Useful in signal processing and timing applications.
- Programmable Power Supply: Can be integrated into power supply systems for adjustable voltage settings.
- Low Resolution DAC Replacement: Can replace low-resolution digital-to-analog converters in certain applications.
- Sensor Calibration: Ideal for calibrating sensors with precise adjustments.
Q & A
- What is the resolution of the AD5231BRU10-REEL7?
The AD5231BRU10-REEL7 has a 1024-step resolution.
- What is the operating temperature range of the AD5231BRU10-REEL7?
The device operates over an extended industrial temperature range of −40°C to +85°C.
- What types of power supply can the AD5231BRU10-REEL7 use?
The device can operate with a single-supply range of 2.7 V to 5.5 V or a dual-supply range of ±2.25 V to ±2.75 V.
- How does the EEMEM restore its settings during power-on?
The EEMEM settings are automatically transferred to the RDAC register during system power-on, restoring the wiper position.
- What is the purpose of the WP function in the AD5231BRU10-REEL7?
The WP (Write Protect) function protects the EEMEM contents from unintended changes.
- Can the AD5231BRU10-REEL7 be used as a replacement for mechanical potentiometers?
Yes, it is designed to replace mechanical potentiometers with enhanced resolution and solid-state reliability.
- What is the typical EEMEM restore time for the AD5231BRU10-REEL7?
The typical EEMEM restore time is approximately 140 μs.
- Does the AD5231BRU10-REEL7 support linear and log taper adjustments?
Yes, it includes predefined linear increment/decrement and ±6 dB/step log taper increment/decrement instructions.
- What type of serial interface does the AD5231BRU10-REEL7 use?
The device uses an SPI-compatible serial interface.
- Can the AD5231BRU10-REEL7 store additional user-defined information?
Yes, it has extra EEMEM for storing user-defined information such as memory data for other components, look-up tables, or system identification information.
