MAX5803ATB+T

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Data acquisition is the process of sampling signals that measure real world physical conditions and converting it into digital numeric values that can be manipulated by a computer or other embedded information processing device. Digital to Analog Converters (DAC) are a key component in this acquisition process, converting discrete digital values into an analog output signal. The MAX5803ATB+T is an 8-bit DAC designed to provide a cost-effective solution with an accuracy of 4.9% up to 8-bit.

The MAX5803ATB+T is primarily used in portable, battery-powered equipment, providing accurate control for low-performance motor control systems and motor protection, audio level control, LED brightness control and other current- or voltage-based output applications. The device is a low power, tiny 8-bit DAC with a single buffered voltage output, an internal voltage reference and a temperature compensation option. It is available in an extremely small 1.6mm x 2.75mm SOT-23-5 package.

The MAX5803ATB+T is equipped with an on-board 60ppm/°C temperature compensated bandgap voltage reference, which is required when higher accuracy is demanded. The output structure includes an active out-of-range indicator (OR), and an adjustment range of 0V to 4.096V for output voltage control. The DAC includes an on-chip 1MΩ input resistance, 0 to 4.096V output range and a good linearity of up to 8 bits.

The working principle of MAX5803ATB+T is to convert digital input data into a corresponding analog output voltage. It starts by detecting an incoming 8-bit binary data code and then decoding it into an equivalent analog voltage value. This analog output is a voltage whose magnitude is proportional to the input code and reverse proportional to the maximum input range of the DAC, that is to say, the MAX5803ATB+T has a precision range of 0 to 4.096V. To ensure that the analog output is correct, the DAC contains an on-chip reference voltage which is used as a reference against which the input binary code is compared. The voltage reference can be adjusted as reflected in the output voltage. The internal input resistance on MAX5803ATB+T ensures that the input code is converted to the desired voltage when the Data input line is provided.

The MAX5803ATB+T provides the user with flexibility. The input binary code can be updated with 8-bit serial data. The user has the option to choose between two modes of operation - constant power mode or voltage mode. The key features which make MAX5803ATB+T an ideal choice for easy and accurate control are: high power conversion speed, low quiescent current, flexible chip select configuration and temperature compensation option.

In conclusion, the MAX5803ATB+T is an 8-bit DAC providing a cost-effective solution with an accuracy of 4.9% up to 8-bits. It is mainly used in portable, battery-powered equipment where high precision is not required. It is equipped with an on-board and temperature compensated bandgap voltage reference and it can operate in two modes: constant power mode or voltage mode. The operation of the DAC is simple in that it detects an incoming 8-bit binary data code and decodes it into a corresponding analog output voltage.

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