Overview
The AD5274BRMZ-20-RL7, produced by Analog Devices Inc., is a single-channel, 256-position digital rheostat. This device combines industry-leading variable resistor performance with nonvolatile memory (NVM) in a compact package. It is designed to offer high precision and reliability, making it suitable for a variety of applications that require adjustable resistance.
The AD5274 features a 20 kΩ nominal resistance, with a maximum ±1% nominal resistor tolerance error. It operates over a wide temperature range of −40°C to +125°C and supports both single-supply (2.7 V to 5.5 V) and dual-supply (±2.5 V to ±2.75 V) operations. The device is controlled through an I²C-compatible digital interface, allowing for precise adjustments and permanent programming of the wiper position using 50-times programmable (50-TP) memory.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 256 positions | |
| Nominal Resistance | 20 kΩ | |
| Nominal Resistor Tolerance Error | ±1% | |
| Temperature Coefficient | 5 ppm/°C | |
| Supply Voltage (Single-Supply) | 2.7 V to 5.5 V | |
| Supply Voltage (Dual-Supply) | ±2.5 V to ±2.75 V | |
| Operating Temperature Range | −40°C to +125°C | |
| Package Type | 10-Lead MSOP | |
| Interface | I²C-compatible | |
| 50-TP Memory | 50 times programmable |
Key Features
- Precision Resistance Control: Offers less than 1% end-to-end resistor tolerance error, ensuring high accuracy in applications.
- Nonvolatile Memory: Features 50-times programmable (50-TP) memory, allowing for permanent programming of the wiper position without external voltage supply.
- I²C Interface: Controlled through an I²C-compatible digital interface, enabling easy communication and adjustments.
- Compact Packaging: Available in a 10-lead MSOP package, providing a compact solution for various applications.
- Wide Operating Range: Operates over an extended industrial temperature range of −40°C to +125°C.
- Dual-Supply Capability: Supports both single-supply and dual-supply operations, making it versatile for different circuit configurations.
Applications
- Mechanical Rheostat Replacements: Ideal for replacing mechanical rheostats due to its digital control and precision.
- Op-Amp Variable Gain Control: Used in op-amp circuits for variable gain control, enhancing the flexibility of amplifier designs.
- Instrumentation: Suitable for gain and offset adjustments in instrumentation applications.
- Programmable Voltage to Current Conversions: Can be used in circuits that require programmable voltage to current conversions.
- Programmable Filters, Delays, Time Constants: Useful in filter circuits and other applications requiring adjustable time constants.
- Programmable Power Supply: Can be integrated into power supply designs to provide adjustable output voltages.
- Sensor Calibration: Used for calibrating sensors in various measurement systems.
Q & A
- What is the nominal resistance of the AD5274BRMZ-20-RL7?
The nominal resistance of the AD5274BRMZ-20-RL7 is 20 kΩ.
- What is the maximum nominal resistor tolerance error of the AD5274BRMZ-20-RL7?
The maximum nominal resistor tolerance error is ±1%.
- What type of interface does the AD5274BRMZ-20-RL7 use?
The device uses an I²C-compatible digital interface.
- What is the operating temperature range of the AD5274BRMZ-20-RL7?
The operating temperature range is −40°C to +125°C.
- What type of memory does the AD5274BRMZ-20-RL7 have?
The device features 50-times programmable (50-TP) nonvolatile memory.
- What are the package options for the AD5274BRMZ-20-RL7?
The device is available in a 10-lead MSOP package.
- Can the AD5274BRMZ-20-RL7 be used in dual-supply configurations?
Yes, it supports both single-supply and dual-supply operations.
- What is the temperature coefficient of the AD5274BRMZ-20-RL7?
The temperature coefficient is 5 ppm/°C.
- What are some common applications of the AD5274BRMZ-20-RL7?
Common applications include mechanical rheostat replacements, op-amp variable gain control, instrumentation, programmable voltage to current conversions, and sensor calibration.
- Does the AD5274BRMZ-20-RL7 require an external voltage supply for programming?
No, it does not require an external voltage supply to facilitate fuse blow and permanent programming.
