Overview
The AD5272BRMZ-20, produced by Analog Devices Inc., is a single-channel digital rheostat that offers high-performance variable resistor functionality combined with nonvolatile memory (NVM). This device is part of the AD5272/AD5274 series, which features 1024-position resolution and a maximum ±1% nominal resistor tolerance error. It is designed to operate in a compact package, making it suitable for a variety of applications requiring precise resistance control.
The AD5272BRMZ-20 supports both single-supply (2.7 V to 5.5 V) and dual-supply (±2.5 V to ±2.75 V) operations, making it versatile for different system requirements. The device is controlled through an I2C-compatible digital interface, allowing for unlimited adjustments before programming the resistance value into the 50-times programmable (50-TP) memory.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Resolution | 1024 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, 1024-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 resistance setting.
- I2C-compatible digital interface for easy control and readback of wiper settings.
- Power on refresh from 50-TP memory, ensuring consistent settings.
- Compact packaging options: 10-lead LFCSP (3 mm × 3 mm × 0.8 mm) and 10-lead MSOP (3 mm × 4.9 mm × 1.1 mm).
- Extended industrial temperature range operation: −40°C to +125°C.
Applications
- Mechanical rheostat replacements.
- Variable gain control in op-amp circuits.
- Gain and offset adjustment in instrumentation.
- Programmable voltage to current conversions.
- Programmable filters, delays, and time constants.
- Programmable power supply applications.
- Sensor calibration.
Q & A
- What is the resolution of the AD5272BRMZ-20?
The AD5272BRMZ-20 has a resolution of 1024 positions.
- What is the nominal resistance of the AD5272BRMZ-20?
The nominal resistance of the AD5272BRMZ-20 is 20 kΩ.
- What is the maximum nominal resistor tolerance error of the AD5272BRMZ-20?
The maximum nominal resistor tolerance error is ±1%.
- What is the temperature coefficient of the AD5272BRMZ-20 in rheostat mode?
The temperature coefficient is 5 ppm/°C.
- What are the supply voltage ranges for the AD5272BRMZ-20?
The device operates on a single-supply from 2.7 V to 5.5 V and on a dual-supply from ±2.5 V to ±2.75 V.
- What interface does the AD5272BRMZ-20 use for control?
The device uses an I2C-compatible digital interface.
- How many times can the wiper position be programmed permanently in the AD5272BRMZ-20?
The wiper position can be programmed permanently 50 times (50-TP memory).
- What is the operating temperature range of the AD5272BRMZ-20?
The operating temperature range is −40°C to +125°C.
- In what package types is the AD5272BRMZ-20 available?
The device is available in 10-lead LFCSP and 10-lead MSOP packages.
- Does the AD5272BRMZ-20 require an external voltage supply for fuse blow?
No, the AD5272BRMZ-20 does not require an external voltage supply to facilitate fuse blow.
