Overview
The AD5220BNZ100, produced 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 and variable resistors, offering precise digital control over resistance settings. It is optimized for use in instrumentation, test equipment, and various applications requiring incremental adjustments.
Key Specifications
| Parameter | Symbol | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Resistor Differential Nonlinearity | R-DNL | RWB, VA = NC, RAB = 10 kΩ | -1 | ±0.4 | +1 | LSB |
| Resistor Integral Nonlinearity | R-INL | RWB, VA = NC, RAB = 10 kΩ | -1 | ±0.5 | +1 | 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 | ||
| Input Capacitance | CIL | 5 | pF | |||
| 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 | |
| Bandwidth -3 dB | BW_10K | RAB = 10 kΩ, Code = 40H | 650 | kHz |
Key Features
- Single-channel, 128-position digitally controlled variable resistor.
- Available in 10 kΩ, 50 kΩ, and 100 kΩ end-to-end resistance values.
- Low power consumption: maximum 40 µA supply current.
- Increment/Decrement count control via a three-wire serial interface (CLK, CS, and UP/DOWN).
- Operates over an extended industrial temperature range of -40°C to +85°C.
- Available in various packages including SO-8, 8-lead plastic DIP, and thin μSOIC.
- Qualified for automotive applications.
Applications
- Mechanical potentiometer replacement.
- Remote 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 AD5220BNZ100 used for? The AD5220BNZ100 is used as a digitally controlled variable resistor, replacing mechanical potentiometers and variable resistors in various applications.
- What are the available resistance values for the AD5220BNZ100? The device is available in 10 kΩ, 50 kΩ, and 100 kΩ end-to-end resistance values.
- How is the resistance adjusted in the AD5220BNZ100? The resistance is adjusted using a three-wire serial interface with CLK, CS, and UP/DOWN inputs.
- What is the power consumption of the AD5220BNZ100? The device has a low power consumption with a maximum supply current of 40 µA.
- What temperature range does the AD5220BNZ100 operate in? The device operates over an extended industrial temperature range of -40°C to +85°C.
- Is the AD5220BNZ100 suitable for automotive applications? Yes, the AD5220BNZ100 is qualified for automotive applications.
- What packages are available for the AD5220BNZ100? The device is available in SO-8, 8-lead plastic DIP, and thin μSOIC packages.
- What is the bandwidth of the AD5220BNZ100? The bandwidth varies depending on the resistance value, e.g., 650 kHz for 10 kΩ at code 40H.
- How does the AD5220BNZ100 handle input logic levels? The device supports input logic high (VIH) of 2.4/2.1 V and input logic low (VIL) of 0.8/0.6 V for VDD = +5 V/+3 V.
- What is the wiper resistance of the AD5220BNZ100? The wiper resistance is between 40 Ω and 100 Ω.
