AD5273BRJZ1-R2

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The AD5273BRJZ1-R2 is a component of the digital potentiometer (DigiPOT(TM)) product series from Analog Devices. This new part combines both digital and analog capabilities into a single device and makes them ideal for a variety of applications, particularly those that require precise control of analog signals in a cost-effective, compact form factor.

The AD5273BRJZ1-R2 is a digitally controlled resistor element that provides a linear resistance range from 0 ohms to 5 kOhm. It supports both non-volatile, programmable memory for storing configurations and a voltage input range of 0 V to 5 V for adjusting resistance levels. The device employs a 12-bit SMFET (silicon-metal-Field-Effect-transistor) resistor array, which provides a very precise and linear resistance approximation when driven by a digital control. With a single-channel configuration, the AD5273BRJZ1-R2 can achieve up to a 1 Ohm resolution. Through a combination of the device’s control and analog output pins, users can adjust the resistance by either a digital control pin or an analog voltage input.

The AD5273BRJZ1-R2 is designed to offer exceptional accuracy and reliability for a wide range of applications. Its flexibility and small size make it an ideal solution for systems that require precise control over analog signals. Typical applications for the AD5273BRJZ1-R2 include:

• Adjustment of motor speed in motor drives
• Low-noise control of voltage regulators for improved power delivery
• Adjustment of voltage reference levels for high precision measurement
• Precision control of other adjustable power supplies and load currents
• Adjustment of logic levels to reduce timing uncertainties in logic circuits

The working principle of the AD5273BRJZ1-R2 is based on the concept of a digitally controlled potentiometer. This type of component uses the properties of Field-Effect Transistors (FETs) to provide an analog voltage output based on an externally supplied digital control signal. To understand how this works, consider the AD5273BRJZ1-R2, which features a 12-bit SMFET resistor array. By connecting the control voltage inputs from 0V to 5V, the resistance of the array can be programmed to a resolution of 1 ohm. This provides a very precise and linear approximation of the desired resistance based on the digital input.

The operation of a digital potentiometer can be divided into two parts: the program-mode operation and the runtime operation. During the programming-mode, the digital control signal can be used to adjust the resistance of the device until the desired level is achieved. Once the programming-mode is complete, the device will enter the runtime-mode, in which the device will operate based on the programmed settings. During the runtime-mode, the resistance can be adjusted by either the external control voltage or by the digital control signal.

In summary, the AD5273BRJZ1-R2 is an ideal solution for applications that require precise control over analog signals. Its compact form factor and ability to offer a linear and precise resistance approximation, makes it the perfect device for motor speed control, voltage regulation, logic levels, and other adjustable power supplies and load currents. By leveraging its programming and runtime modes, users can adjust both the resistance and the control signal for optimized performance.

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