604-00010

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Digital potentiometer ICs such as 604-00010 from Analog Devices are used in a wide variety of applications. They feature non-volatile memory for storing resistance values and are used to control the resistance levels in applications such as potentiometers, remote sensing, and analog to digital conversion.

Digital potentiometer ICs generally consists of a wiper driven by a digital or analog control signal, and two sides or end-stops, forming a three terminal device. The digital potentiometer IC may be used in two main modes, either as a conventional potentiometer with the digital control range (referred to as a “potentiometer” mode) or as a variable resistor with the static digital control (referred to as a “resistor” mode). The wiper is the middle connection of the three terminals, and when the wiper is moved across the resistor elements it forms a variable resistor. By controlling the stop points and the speed of the wiper, the resulting resistance can be programmed to match a desired resistance value.

In “potentiometer” mode, the digital potentiometer IC is used as a voltage divider controlled by a digital control signal. The resistance value between the two end-stops is set by the digital control interface, which in the 604-00010 is selectable between 1 bit to 16 bit resolution for the pot control range. This allows for both a coarse and fine control over the resistance value. The wiper moves in a linear fashion between the two stops, and the resistance will be linearly proportional to the digital control value.

In “resistor” mode, the digital potentiometer IC is used to set a fixed resistance value that is programmed via the digital control interface. This mode of operation is suitable for applications such as trimming errors out of an analog signal or defining the gain of a difference amplifier. The digitally controlled wiper allows for a precise and repeatable adjustment, and the resistance will be proportional to the digital control value.

A major advantage of the use of digital potentiometer ICs is that once programmed, the resistance values of the IC do not forget the value, being non-volatile. This can be particularly useful in applications such as automotive or medical device where very accurate changes in resistance levels are required over time. Additionally, the use of digital potentiometer ICs saves time and money by reducing the need for manual pot making and trimming.

The 604-00010 from Analog Devices is a 4-channel, 16-bit digital potentiometer IC that provides both fine and coarse control of resistances using non-volatile memory. This IC provides a wide variety of digital control interfaces, including SPI, I2C and PWM, as well as analog interfaces. This makes it a popular choice for application in a variety of embedded systems. Additionally, the 604-00010 has a temperature coefficient of 1 ppm/°C to reduce temperature related drift of resistance value, and the on-chip EEPROM allows for a fast and easy programming of resistance values.

Digital potentiometer ICs such as the 604-00010 from Analog Devices are widely used in a variety of applications. The digitally controlled wiper allows for precise and repeatable adjustment as well as non-volatile memory for storing resistance values, making them ideal for applications in remote sensing, potentiometers, and analog to digital conversion.

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