Overview
The AD5274BCPZ-100-RL7, produced by Analog Devices Inc., is a single-channel digital rheostat that offers high-performance variable resistor functionality combined with nonvolatile memory. This device is part of the AD5272/AD5274 series, which features 256-position resolution and is available in various nominal resistance values, including 20 kΩ, 50 kΩ, and 100 kΩ. The AD5274 is designed for precision applications, ensuring less than 1% end-to-end resistor tolerance error and a low temperature coefficient of 5 ppm/°C in rheostat mode. It operates on a single supply voltage of 2.7 V to 5.5 V or dual supply voltages of ±2.5 V to ±2.75 V, making it versatile for various circuit designs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 256 positions | |
| Nominal Resistance | 100 kΩ | Ω |
| Resistor Tolerance Error | ±1% | |
| Temperature Coefficient (Rheostat Mode) | 5 ppm/°C | |
| Supply Voltage (Single Supply) | 2.7 V to 5.5 V | V |
| Supply Voltage (Dual Supply) | ±2.5 V to ±2.75 V | V |
| Memory Type | 50-times programmable (50-TP) nonvolatile memory | |
| Interface | I²C-compatible | |
| Package | 10-lead LFCSP (3 mm × 3 mm × 0.8 mm) | |
| Operating Temperature Range | −40°C to +125°C | °C |
Key Features
- Single-channel, 256-position digital rheostat with high-resolution variable resistor performance.
- Low resistor tolerance error of ±1%, ensuring precision in applications.
- 50-times programmable (50-TP) nonvolatile memory for wiper settings.
- I²C-compatible digital interface for easy control and readback of wiper settings.
- Compact package options including 10-lead LFCSP and MSOP.
- Extended industrial temperature range of −40°C to +125°C.
- No external voltage supply required for fuse blow and permanent programming.
Applications
- Mechanical rheostat replacements.
- Op-amp variable gain control.
- Instrumentation: gain and offset adjustment.
- Programmable voltage to current conversions.
- Programmable filters, delays, and time constants.
- Programmable power supply.
- Sensor calibration.
Q & A
- What is the resolution of the AD5274BCPZ-100-RL7?
The AD5274BCPZ-100-RL7 has a resolution of 256 positions.
- What are the nominal resistance values available for the AD5274 series?
The AD5274 series is available with nominal resistance values of 20 kΩ, 50 kΩ, and 100 kΩ.
- What is the resistor tolerance error of the AD5274BCPZ-100-RL7?
The resistor tolerance error is ±1%.
- What type of memory does the AD5274BCPZ-100-RL7 use?
The device uses 50-times programmable (50-TP) nonvolatile memory.
- What interface does the AD5274BCPZ-100-RL7 support?
The device supports an I²C-compatible digital interface.
- What are the package options for the AD5274BCPZ-100-RL7?
The device is available in a 10-lead LFCSP (3 mm × 3 mm × 0.8 mm) and a 10-lead MSOP package.
- What is the operating temperature range of the AD5274BCPZ-100-RL7?
The operating temperature range is −40°C to +125°C.
- Does the AD5274BCPZ-100-RL7 require an external voltage supply for programming?
No, the device does not require an external voltage supply for fuse blow and permanent programming.
- What are some common applications of the AD5274BCPZ-100-RL7?
Common applications include mechanical rheostat replacements, op-amp variable gain control, instrumentation adjustments, and sensor calibration.
- How does the AD5274BCPZ-100-RL7 ensure precision in variable resistor applications?
The device ensures precision through its low resistor tolerance error of ±1% and a low temperature coefficient of 5 ppm/°C in rheostat mode.
