MCP4821-E/P

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Data Acquisition - Digital to Analog Converters (DAC) are used for the conversion of digital signals into analog signals in order to accurately transmit information. It is used in a wide range of applications, such as medical equipment, automotive, robotics, industrial control, and audio equipment. The popularity of DACs is due to the need for accuracy and the potential for increasing levels of complexity in a very small amount of hardware. The MCP4821-E/P is a single channel, 12-bit Digital-to-Analog Converter (DAC) that has both an adjustable voltage output and a current output.

The MCP4821-E/P DAC chip has two main application fields: voltage output and current output. In voltage output applications, it can provide an accurate adjustable DC output voltage. It is suitable for various analog control applications, such as the output of a precision reference voltage, amplifier gain setting, and the control of potentiometers, trimmers, or other voltage output devices. For current output applications, it can provide a precise controllable current. This current can be used for the control of LEDs, for example.

The key features of the MCP4821-E/P are its high precision and low noise. The device has an industry leading 12-bit resolution, with a maximum accuracy of ±0.5%, a 1 LSB Maximum Integral Nonlinearity (INL), and 0.03%. Its linearity error is extremely low, and Power Supply Rejection Ratio (PSRR) is 75 dB. The device also features a wide supply voltage range of 2.7 to 5.5V.

The MCP4821-E/P operates in two modes: double-buffered and single-buffered. In double-buffered mode, data is loaded into a register before being output to the DAC. This eliminates errors due to a transient response time, which can influence the accuracy of the output. In single-buffered mode, the device will output data when it is loaded into the register. This is useful for applications where a fast conversion time is required.

The MCP4821-E/P has an internal oscillator and four output settling resistors which can be used to create a low-cost thermal compensation circuit. This circuit can be used to reduce the output offset drift due to temperature changes. The oscillator can also be used to create a data clock, which can be used to clock out the data at different speeds.

The MCP4821-E/P has a configurable, temperature compensated reference voltage as well as a power-down output, allowing the device to be powered down when not in use in order to save energy. The configurable reference voltage can be used to create different voltage levels depending on the application requirements. It also has adjustable shutdown and write protect pins, for additional flexibility.

The MCP4821-E/P is an excellent performing, low power, and cost-effective DAC for a wide range of applications. It is suitable for precision control applications, as well as for LED control, and its flexibility and low noise make it a great choice for any application. It has adjustable voltage and current outputs, a configurable reference voltage, and temperature compensating circuitry, making it an ideal solution for a variety of applications.

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