Overview
The AD5220BRMZ10, manufactured by Analog Devices Inc., is a single-channel, 128-position digitally controlled variable resistor (VR) device. This component functions as an electronic replacement for mechanical potentiometers, offering precise and programmable resistance adjustments. It is optimized for use in instrument and test equipment, particularly in push-button applications. The device features a three-wire serial input interface with clock (CLK), chip select (CS), and UP/DOWN (U/D) control inputs, allowing for easy integration into various systems without the need for microcontrollers.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Resistance | RAB | - | - | 10 kΩ | - | Ω |
| Number of Positions | - | - | - | 128 | - | - |
| Supply Voltage | VDD | - | 2.7 V | - | 5.5 V | V |
| Supply Current | IDD | VDD = 5 V | 15 µA | - | 40 µA | µA |
| Operating Temperature | - | - | -40°C | - | 85°C | °C |
| Temperature Coefficient | ∆RAB/∆T | - | - | 800 ppm/°C | - | ppm/°C |
| Wiper Resistance | RW | VDD = 3 V or 5 V | 40 Ω | - | 100 Ω | Ω |
| Input Logic High | VIH | VDD = 5 V | - | 2.4 V | - | V |
| Input Logic Low | VIL | VDD = 5 V | - | 0.8 V | - | V |
| Input Current | IIL | VIN = 0 V or 5 V | - | ±1 µA | - | µA |
Key Features
- Single-channel, 128-position digitally controlled variable resistor (VR) device.
- Three-wire serial input interface with clock (CLK), chip select (CS), and UP/DOWN (U/D) control inputs.
- Low power consumption: maximum supply current of 40 µA.
- Available in 10 kΩ, 50 kΩ, and 100 kΩ end-to-end resistance values.
- Operating temperature range: -40°C to +85°C.
- Qualified for automotive applications with controlled manufacturing processes.
- Available in 8-lead MSOP, SOIC, and PDIP packages.
- True adjustable resistance between the wiper and either end point of the fixed resistor.
- Nominal temperature coefficient of 800 ppm/°C.
Applications
- Replacement for mechanical potentiometers.
- Incremental adjustment applications in instrumentation (e.g., gain, offset adjustment).
- Programmable voltage-to-current conversion.
- Programmable filters, delays, and time constants.
- Line impedance matching.
- Power supply adjustment.
- Remote control and push-button applications.
Q & A
- What is the AD5220BRMZ10 used for?
The AD5220BRMZ10 is used as a digitally controlled variable resistor, replacing mechanical potentiometers in various applications.
- What are the available resistance values for the AD5220BRMZ10?
The AD5220BRMZ10 is available in 10 kΩ, 50 kΩ, and 100 kΩ end-to-end resistance values.
- What is the operating temperature range of the AD5220BRMZ10?
The operating temperature range is -40°C to +85°C.
- How many positions does the AD5220BRMZ10 have?
The AD5220BRMZ10 has 128 positions.
- What is the supply voltage range for the AD5220BRMZ10?
The supply voltage range is 2.7 V to 5.5 V.
- Is the AD5220BRMZ10 suitable for automotive applications?
Yes, the AD5220BRMZ10 is qualified for automotive applications with controlled manufacturing processes.
- What packages are available for the AD5220BRMZ10?
The AD5220BRMZ10 is available in 8-lead MSOP, SOIC, and PDIP packages.
- What is the typical wiper resistance of the AD5220BRMZ10?
The typical wiper resistance is 40 Ω to 100 Ω.
- Does the AD5220BRMZ10 require external debounce circuitry?
Yes, external debounce circuitry is required for the negative-edge sensitive CLK pin.
- What is the temperature coefficient of the AD5220BRMZ10?
The nominal temperature coefficient is 800 ppm/°C.
