Overview
The AD5220BRZ50, produced by Analog Devices Inc., is a single-channel, 128-position digitally controlled variable resistor (VR) device. This device 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 AD5220BRZ50 is available in an 8-lead SOIC package and operates over an extended industrial temperature range of -40°C to +85°C.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| End-to-End Resistance | RAB | - | - | 50 kΩ | - | Ω |
| Resistor Differential Nonlinearity | R-DNL | RWB, VA = NC, RAB = 50 kΩ | -0.5 | ±0.1 | 0.5 | LSB |
| Resistor Integral Nonlinearity | R-INL | RWB, VA = NC, RAB = 50 kΩ | -0.5 | ±0.1 | 0.5 | LSB |
| Nominal Resistor Tolerance | ∆R | TA = +25°C | -30 | - | 30 | % |
| Resistance Temperature Coefficient | ∆RAB/∆T | VAB = VDD, Wiper = No Connect | - | - | 800 | ppm/°C |
| Wiper Resistance | RW | IW = VDD/R, VDD = +3 V or +5 V | 40 | - | 100 | Ω |
| Input Logic High | VIH | VDD = +5 V/+3 V | 2.4/2.1 | - | - | V |
| Input Logic Low | VIL | VDD = +5 V/+3 V | 0.8/0.6 | - | - | V |
| Input Current | IIL | VIN = 0 V or +5 V | - | - | ±1 | µA |
| Power Supply Range | VDD | - | 2.7 | - | 5.5 | V |
| Supply Current | IDD | VIH = +5 V or VIL = 0 V, VDD = +5 V | 15 | - | 40 | µA |
| Power Dissipation | PDISS | VIH = +5 V or VIL = 0 V, VDD = +5 V | 75 | - | 200 | µW |
Key Features
- Digital Potentiometer: Provides 128-position digitally controlled variable resistance, mimicking the function of a mechanical potentiometer or variable resistor.
- Low Power Consumption: Very low power dissipation with a maximum supply current of 40 µA.
- Increment/Decrement Control: Features a three-wire serial input interface with clock (CLK), chip select (CS), and up/down (U/D) control pins.
- Temperature Stability: Nominal resistance temperature coefficient of 800 ppm/°C.
- Compact Packaging: Available in 8-lead SOIC, MSOP, and PDIP packages for various design needs.
- Automotive Grade: Qualified for automotive applications with controlled manufacturing to support quality and reliability requirements.
Applications
- Mechanical Potentiometer Replacement: Ideal for replacing mechanical potentiometers in various applications.
- Instrumentation: Suitable for gain, offset adjustment, and other incremental adjustment applications in instrumentation.
- Programmable Voltage-to-Current Conversion: Can be used in programmable voltage-to-current conversion circuits.
- Programmable Filters, Delays, Time Constants: Useful in programmable filter, delay, and time constant applications.
- Line Impedance Matching: Can be used for line impedance matching due to its adjustable resistance.
- Power Supply Adjustment: Suitable for adjusting power supply settings in various electronic systems.
Q & A
- What is the AD5220BRZ50 used for?
The AD5220BRZ50 is used as a digital potentiometer, providing 128-position digitally controlled variable resistance, similar to a mechanical potentiometer or variable resistor.
- What are the available resistance values for the AD5220BRZ50?
The AD5220BRZ50 is available with end-to-end resistance values of 10 kΩ, 50 kΩ, and 100 kΩ.
- What is the temperature range for the AD5220BRZ50?
The AD5220BRZ50 operates over an extended industrial temperature range of -40°C to +85°C.
- How is the resistance controlled in the AD5220BRZ50?
The resistance is controlled through a three-wire serial input interface with clock (CLK), chip select (CS), and up/down (U/D) control pins.
- Is the AD5220BRZ50 suitable for automotive applications?
Yes, the AD5220BRZ50 is qualified for automotive applications with controlled manufacturing to support quality and reliability requirements.
- What are the power supply requirements for the AD5220BRZ50?
The AD5220BRZ50 operates with a power supply range of 2.7 V to 5.5 V.
- What is the maximum supply current for the AD5220BRZ50?
The maximum supply current for the AD5220BRZ50 is 40 µA.
- Does the AD5220BRZ50 require external debounce circuitry?
Yes, external debounce circuitry is required for the negative-edge sensitive CLK pin.
- In what packages is the AD5220BRZ50 available?
The AD5220BRZ50 is available in 8-lead SOIC, MSOP, and PDIP packages.
- What are some common applications of the AD5220BRZ50?
Common applications include mechanical potentiometer replacement, instrumentation, programmable voltage-to-current conversion, programmable filters, delays, time constants, line impedance matching, and power supply adjustment.
