Overview
The AD5274BRMZ-20, 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 AD5274BRMZ-20 specifically has a nominal resistance of 20 kΩ and 256 taps. It operates within a single-supply range of 2.7 V to 5.5 V or a dual-supply range of ±2.5 V to ±2.75 V, making it versatile for various applications. The device is controlled through an I²C-compatible digital interface, allowing for precise and flexible control over the wiper settings.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 256 positions | |
| Nominal Resistance | 20 kΩ | Ω |
| Nominal Resistor Tolerance Error | ±1% | % |
| Temperature Coefficient (Rheostat Mode) | 5 ppm/°C | 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 |
| Operating Temperature Range | −40°C to +125°C | °C |
| Package Type | 10-Lead MSOP | |
| Interface | I²C-compatible | |
| 50-TP Memory | 50 times programmable |
Key Features
- Single-channel, 256-position digital rheostat with high-resolution variable resistor performance.
- Maximum ±1% nominal resistor tolerance error, ensuring high precision.
- 50-times programmable (50-TP) wiper memory for permanent settings.
- Rheostat mode temperature coefficient of 5 ppm/°C for stable performance over temperature changes.
- Operates in single-supply (2.7 V to 5.5 V) or dual-supply (±2.5 V to ±2.75 V) configurations.
- I²C-compatible digital interface for easy control and communication.
- Compact 10-lead MSOP package, suitable for space-constrained applications.
- Guaranteed operation over an extended industrial temperature range of −40°C to +125°C.
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 nominal resistance of the AD5274BRMZ-20?
The nominal resistance of the AD5274BRMZ-20 is 20 kΩ.
- What is the resolution of the AD5274BRMZ-20?
The AD5274BRMZ-20 has a resolution of 256 positions.
- What is the temperature coefficient of the AD5274BRMZ-20 in rheostat mode?
The temperature coefficient in rheostat mode is 5 ppm/°C.
- What is the operating temperature range of the AD5274BRMZ-20?
The operating temperature range is −40°C to +125°C.
- What type of interface does the AD5274BRMZ-20 use?
The AD5274BRMZ-20 uses an I²C-compatible digital interface.
- How many times can the wiper memory be programmed in the AD5274BRMZ-20?
The wiper memory can be programmed 50 times (50-TP).
- What package types are available for the AD5274BRMZ-20?
The AD5274BRMZ-20 is available in a 10-lead MSOP package.
- Does the AD5274BRMZ-20 require an external voltage supply for fuse blow?
No, the AD5274BRMZ-20 does not require an external voltage supply for fuse blow.
- What are some common applications of the AD5274BRMZ-20?
Common applications include mechanical rheostat replacements, op-amp variable gain control, instrumentation adjustments, and sensor calibration.
- How does the AD5274BRMZ-20 ensure precision and stability?
The AD5274BRMZ-20 ensures precision and stability through its low nominal resistor tolerance error (±1%) and a temperature coefficient of 5 ppm/°C.
