Overview
The AD5272BRMZ-20-RL7, produced by Analog Devices Inc., is a single-channel digital rheostat that combines high-performance variable resistor functionality with nonvolatile memory (NVM) in a compact package. This device is part of the AD5272/AD5274 series, offering 1024-position resolution and a nominal resistance of 20 kΩ. It features an I2C-compatible digital interface, allowing for precise control and readback of the wiper settings. The device is designed for applications requiring high accuracy and reliability, with a maximum ±1% nominal resistor tolerance error and a rheostat mode temperature coefficient of 5 ppm/°C.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Resolution | Number of positions | 1024 positions |
| Nominal Resistance | Resistance value | 20 kΩ |
| Resistor Tolerance Error | Maximum error | ±1% |
| Temperature Coefficient | Rheostat mode temperature coefficient | 5 ppm/°C |
| Supply Voltage | Single-supply operation range | 2.7 V to 5.5 V |
| Dual-Supply Operation | Dual-supply operation range for ac or bipolar operations | ±2.5 V to ±2.75 V |
| Interface | Type of digital interface | I2C-compatible |
| Memory | Type and number of programmable memory | 50-times programmable (50-TP) wiper memory |
| Package | Type and dimensions of the package | MSOP, 10-lead, 3 mm × 4.9 mm × 1.1 mm |
Key Features
- High Resolution: 1024-position resolution for precise control.
- Low Resistor Tolerance Error: Maximum ±1% nominal resistor tolerance error.
- Nonvolatile Memory: 50-times programmable (50-TP) wiper memory.
- I2C Interface: I2C-compatible digital interface for easy communication and control.
- Compact Package: Available in MSOP and LFCSP packages for space-saving designs.
- Wide Supply Voltage Range: Single-supply operation from 2.7 V to 5.5 V and dual-supply operation for ac or bipolar operations.
- Low Temperature Coefficient: Rheostat mode temperature coefficient of 5 ppm/°C.
Applications
- Mechanical Rheostat Replacements: Ideal for replacing mechanical potentiometers in various applications.
- Op-Amp Variable Gain Control: Used for variable gain control in operational amplifier circuits.
- Instrumentation: Suitable for gain and offset adjustments in instrumentation systems.
- Programmable Voltage to Current Conversions: Used in applications requiring programmable voltage to current conversions.
- Programmable Filters, Delays, Time Constants: Can be used in filter circuits and other applications requiring adjustable time constants.
- Programmable Power Supply: Used in power supply circuits that require adjustable voltage or current settings.
- Sensor Calibration: Useful for calibrating sensors in various measurement systems.
Q & A
- What is the resolution of the AD5272BRMZ-20-RL7?
The AD5272BRMZ-20-RL7 has a resolution of 1024 positions.
- What is the nominal resistance of the AD5272BRMZ-20-RL7?
The nominal resistance is 20 kΩ.
- What is the maximum resistor tolerance error of the AD5272BRMZ-20-RL7?
The maximum resistor tolerance error is ±1%.
- What type of digital interface does the AD5272BRMZ-20-RL7 use?
The device uses an I2C-compatible digital interface.
- What is the temperature coefficient of the AD5272BRMZ-20-RL7 in rheostat mode?
The temperature coefficient in rheostat mode is 5 ppm/°C.
- What is the supply voltage range for the AD5272BRMZ-20-RL7?
The device operates on a single supply from 2.7 V to 5.5 V and supports dual-supply operation for ac or bipolar operations from ±2.5 V to ±2.75 V.
- What type of memory does the AD5272BRMZ-20-RL7 have?
The device has 50-times programmable (50-TP) wiper memory.
- In what package types is the AD5272BRMZ-20-RL7 available?
The device is available in MSOP and LFCSP packages.
- What are some common applications of the AD5272BRMZ-20-RL7?
Common applications include mechanical rheostat replacements, op-amp variable gain control, instrumentation, programmable voltage to current conversions, programmable filters, delays, time constants, programmable power supply, and sensor calibration.
- How does the I2C interface work on the AD5272BRMZ-20-RL7?
The I2C interface operates in standard (100 kHz) and fast (400 kHz) modes, with a 7-bit target address and support for repeated start conditions. The controller initiates data transfer by establishing a start condition, followed by the address byte and acknowledge bit.
