Overview
The AD5220BRMZ100-R7, produced by Analog Devices Inc., is a single-channel, 128-position digitally controlled variable resistor (VR) device. This component functions as a digital potentiometer, offering the same electronic adjustment capabilities as a mechanical potentiometer or variable resistor. It is optimized for use in instrument and test equipment, particularly in push-button applications. The device is available in various packages, including the 8-lead MSOP package for this specific model.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Number of Positions | 128 | - |
| Nominal Resistor Values | 10 kΩ, 50 kΩ, 100 kΩ | - |
| Operating Temperature Range | -40°C to +85°C | °C |
| Resistance Temperature Coefficient | 800 | ppm/°C |
| Resistor Tolerance | ±30% | % |
| Power Supply Range | 2.7 V to 5.5 V | V |
| Supply Current | 15 µA to 40 µA | µA |
| Bandwidth (-3 dB) | 650 kHz (10 kΩ), 142 kHz (50 kΩ), 69 kHz (100 kΩ) | kHz |
| Input Logic High | 2.4 V (VDD = 5 V), 2.1 V (VDD = 3 V) | V |
| Input Logic Low | 0.8 V (VDD = 5 V), 0.6 V (VDD = 3 V) | V |
| Input Current | ±1 µA | µA |
| Input Capacitance | 5 pF | pF |
Key Features
- Single-channel, 128-position digitally controlled variable resistor.
- Available in 10 kΩ, 50 kΩ, and 100 kΩ nominal resistor values.
- Low power consumption: 40 µA maximum.
- Increment/decrement count control via UP/DOWN and CLK inputs.
- Simple digital interface eliminates the need for microcontrollers in front panel designs.
- Qualified for automotive applications with controlled manufacturing.
- Available in 8-lead MSOP, PDIP, and SOIC packages.
Applications
- Mechanical potentiometer replacement.
- Remote control and incremental adjustment applications.
- Instrumentation: gain and offset adjustment.
- Programmable voltage-to-current conversion.
- Programmable filters, delays, and time constants.
- Line impedance matching.
- Power supply adjustment.
Q & A
- What is the AD5220BRMZ100-R7 used for? The AD5220BRMZ100-R7 is used as a digitally controlled variable resistor, replacing mechanical potentiometers in various applications.
- What are the nominal resistor values available for the AD5220? The nominal resistor values are 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the operating temperature range of the AD5220BRMZ100-R7? The operating temperature range is -40°C to +85°C.
- How is the wiper position controlled in the AD5220? The wiper position is controlled by pulsing the CLK pin while CS is active low, with the direction controlled by the U/D input pin.
- What is the power supply range for the AD5220BRMZ100-R7? The power supply range is from 2.7 V to 5.5 V.
- Is the AD5220BRMZ100-R7 suitable for automotive applications? Yes, the AD5220W models, including this one, are qualified for automotive applications with controlled manufacturing.
- What packages are available for the AD5220? The AD5220 is available in 8-lead MSOP, PDIP, and SOIC packages.
- What is the bandwidth of the AD5220BRMZ100-R7? The bandwidth is 650 kHz for 10 kΩ, 142 kHz for 50 kΩ, and 69 kHz for 100 kΩ.
- Does the AD5220 require external debounce circuitry? Yes, external debounce circuitry is required for the negative-edge sensitive CLK pin.
- What is the maximum supply current of the AD5220BRMZ100-R7? The maximum supply current is 40 µA.
