DAC725KP

Reference Type:	Internal
Base Part Number:	DAC725
Supplier Device Package:	28-PDIP
Package / Case:	28-DIP (0.600", 15.24mm)
Operating Temperature:	0°C ~ 70°C
Architecture:	--
INL/DNL (LSB):	--
Voltage - Supply, Digital:	5V
Voltage - Supply, Analog:	±11.4 V ~ 16.5 V
Series:	--
Data Interface:	Parallel, SPI
Differential Output:	No
Output Type:	Voltage - Buffered
Settling Time:	8µs
Number of D/A Converters:	2
Number of Bits:	16
Part Status:	Obsolete
Packaging:	Tube

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Data Acquisition - Digital to Analog Converters (DAC)

Digital-to-Analog Converters (DACs) are devices designed to convert digital signals into analog signals. The DAC725KP is a low-noise, low-jitter, 8-bit Digital-to-Analog Converter (DAC) from Texas Instruments. It is designed to provide high output accuracy and stability for precision audio and system control applications.

Application Field

The DAC725KP is ideally suited for a range of applications in the audio, video, telecommunications, and industrial control. For example, it can be used in audio systems, as well as in medical imaging and communications systems, to convert digital signals into analog signals. It can also be used in industrial systems to convert digital commands into analog signals needed to control actuators and sensors. The DAC725KP offers reliable performance and accuracy across the full dynamic range. Its low-noise and low-jitter design helps ensure high signal fidelity and stability in a variety of applications. Its low-noise linearity also provides excellent dynamic range and excellent signal-to-noise ratio.

Working Principle

The output of the DAC725KP is a binary coded digital signal that is converted to a stable analog voltage. The process of converting a digital signal to an analog signal is called digital-to-analog conversion.The digital signal consists of a sequence of 1s and 0s, also known as a digital word. This digital word has a value that is related to the voltage output of the DAC. The digital word of the DAC725KP is an 8-bit digital word that can represent 256 different levels of voltage.When the DAC725KP is activated, it sends a digital code (a voltage) to its output. The precision of this voltage is determined by the number of data bits in the digital word sent to the DAC. The accuracy is determined by the reference voltage used. Once the digital word is sent to the DAC, it is converted to its corresponding analog voltage through a process called voltage scaling. Voltage scaling is a process in which the digital word is used as an input to a multiplier/accumulator (M/A) circuit, which calculates the analog output voltage level. The M/A circuit used in the DAC725KP is a multiplying DAC (MDAC).Once the analog output voltage is determined, it is compared to the reference voltage. If the output voltage is lower than the reference voltage, the output of the DAC is increased until it matches the reference voltage. If the output voltage is greater than the reference voltage, the output of the DAC is decreased until it matches the reference voltage. The reference voltage is provided by an external voltage source or by an internal voltage source. Once the analog output voltage has been adjusted to match the reference voltage, the DAC725KP is ready to receive and convert the next digital word. This process is repeated every time the DAC receives a digital word.The DAC725KP can operate in single-ended, differential, and ground referenced output modes. In single-ended mode, the output voltage is referenced to the ground reference voltage. In differential mode, the output voltage is related to the difference between the two input voltages.

Conclusion

The DAC725KP is a reliable and accurate 8-bit Digital-to-Analog Converter (DAC) from Texas Instruments. Its low-jitter and low-noise design enables it to be used in high-fidelity audio and system control applications. The DAC725KP is also highly suitable for medical imaging and communications systems, as well as in industrial systems, to convert digital signals into analog signals. By using an M/A circuit and a reference voltage, the DAC725KP can quickly and accurately convert digital signals into analog signals.

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