Overview
The AD5274BCPZ-20-RL7 is a digital rheostat produced by Analog Devices Inc. This component is part of the AD5272/AD5274 series, which offers high precision and flexibility in resistor adjustment. The device features a single-channel, 256-position resolution, making it suitable for various applications requiring precise resistance control.
It operates with a nominal resistance of 20 kΩ and supports a wide range of supply voltages from 2.7 V to 5.5 V. The device is controlled through an I2C-compatible digital interface, allowing for easy integration into complex systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Nominal Resistance | 20 kΩ | |
| Resolution | 256 positions | |
| Nominal Resistor Tolerance Error | ±1% | |
| Wiper Memory | 50-times programmable (50-TP) | |
| Temperature Coefficient (Rheostat Mode) | 5 ppm/°C | |
| Supply Voltage Range | 2.7 V to 5.5 V | |
| Serial Clock Frequency | Standard mode: 100 kHz, Fast mode: 400 kHz | |
| Wiper Resistance (Code = zero scale) | 35 Ω to 70 Ω | |
| Capacitance (measured to GND, code = half scale) | 90 pF (A), 40 pF (W) |
Key Features
- Single-channel, 256-position resolution for precise resistance control.
- Nominal resistance of 20 kΩ with ±1% tolerance error.
- 50-times programmable (50-TP) wiper memory for flexible settings.
- I2C-compatible digital interface for easy control and communication.
- Operating voltage range of 2.7 V to 5.5 V, suitable for various power supply conditions.
- Low temperature coefficient of 5 ppm/°C in rheostat mode, ensuring stable performance over temperature variations.
- Support for standard (100 kHz) and fast (400 kHz) data transfer modes.
Applications
- Audio and video equipment: For volume control, tone adjustment, and other audio/video settings.
- Industrial control systems: For precise resistance adjustments in control loops and feedback mechanisms.
- Medical devices: For calibration and adjustment in medical equipment such as ECG machines and patient monitoring systems.
- Aerospace and defense: For applications requiring high precision and reliability in resistance control.
- Automotive systems: For various control and adjustment needs in automotive electronics.
Q & A
- What is the nominal resistance of the AD5274BCPZ-20-RL7?
The nominal resistance is 20 kΩ.
- What is the resolution of the AD5274BCPZ-20-RL7?
The resolution is 256 positions.
- What is the tolerance error of the nominal resistor?
The nominal resistor tolerance error is ±1%.
- How many times can the wiper memory be programmed?
The wiper memory is 50-times programmable (50-TP).
- What is the temperature coefficient in rheostat mode?
The temperature coefficient in rheostat mode is 5 ppm/°C.
- What is the operating voltage range of the AD5274BCPZ-20-RL7?
The operating voltage range is from 2.7 V to 5.5 V.
- What are the supported serial clock frequencies?
The device supports standard mode (100 kHz) and fast mode (400 kHz) serial clock frequencies.
- How is the device controlled?
The device is controlled through an I2C-compatible digital interface.
- What are some common applications of the AD5274BCPZ-20-RL7?
Common applications include audio and video equipment, industrial control systems, medical devices, aerospace and defense, and automotive systems.
- Can multiple AD5274 devices be used on the same bus?
