AD7224KP

Reference Type:	External
Base Part Number:	AD7224
Supplier Device Package:	20-PLCC (9x9)
Package / Case:	20-LCC (J-Lead)
Operating Temperature:	-40°C ~ 85°C
Architecture:	R-2R
INL/DNL (LSB):	±1 (Max), ±1 (Max)
Voltage - Supply, Digital:	14.25 V ~ 15.75 V
Voltage - Supply, Analog:	11.4 V ~ 16.5 V, ±5V
Series:	--
Data Interface:	Parallel
Differential Output:	No
Output Type:	Voltage - Buffered
Settling Time:	20µs
Number of D/A Converters:	1
Number of Bits:	8
Part Status:	Obsolete
Packaging:	Tube

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AD7224KP Data Acquisition - Digital to Analog Converters (DAC) Application Field and Working Principle
Data acquisition is a primary endeavour in the technological world. As part of this endeavour, a variety of digital to analog converters (DAC) have been developed over time to allow the various processes in question to be completed. Similarly, the AD7224KP, a 12 bit multiplying DAC which is produced by Texas Instruments, has found its place as a formidable device in this endeavour.The AD7224KP DAC is most often used in the industry to facilitate operations such as signal conditioning as well as controlling a variety of analog functions. Specifically, the device can be used in both industry and consumer electronics for common functions such as the generation of analog Voltage values for the application of signals in general. Additionally, the device is often used to drive digital potentiometers, which are devices that allow the user to create a thick digital divider current to be used for signal conditioning purposes.Underneaath the hood, the AD7224KP works via the integration of a 12-bit read-only memory (ROM), which consists of an 8-bit address and fixed data that is stored within the ROM format. From there, the ROM provides analog signal to one of the four channels present in the system. As the outputs of the four channels are always equal in terms of value, it allows differential signals to be output.Other features of the AD7224KP DAC include a power-on reset line, a set of zero-scale calibration pins, and a power down control line. The power-on reset line allowed users to reset the device at any time during operations, while the zero-scale calibration pins are indicated to allow the user to set the output at zero volts, regardless of the device\'s operating conditions. Finally, the power down control is a feature which allows the device to be placed into a state of sleep upon low current draw, where it can be awoken via a low to high transition on the line. The AD7224KP is powered by a single 5V supply and draws very low current, typically 100μA (microamps). Being symmetrical supplied with a single supply, it has both positive and negative voltage references that generate the required output voltages as well as producing a zero-level output when no input signals are applied. Overall, the AD7224KP is a robust DAC, and with its 12-bit resolution allows for more precision in the conversion of the digital signal to its correct output, which often results in less noise and smoother curves. Its power-on reset line and zero scale pins allow for a good amount of flexibility when it comes to resetting and setting the device output to the correct levels, while its low power consumption helps reduce energy draw. Accordingly, the AD7224KP has been a mainstay in the data acquisition field for quite some time, and is likely to continue to be so for foreseeable future.

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