AD7225KP-REEL

Reference Type:	External
Base Part Number:	AD7225
Supplier Device Package:	28-PLCC (11.51x11.51)
Package / Case:	28-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:	4µs
Number of D/A Converters:	4
Number of Bits:	8
Part Status:	Obsolete
Packaging:	Tape & Reel (TR)

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AD7225KP-REEL Data Acquisition – Digital to Analog Converters (DAC)Digital to analog converters (DACs) are analog-output integrated circuits composed of an array of amplifiers and switched-capacitors. The AD7225KP-REEL is an example of a DAC that includes an array of 16 DAC cells arranged in a 4 × 4 configuration. Each of these cells contains an amplifier and an array of switched-capacitors to realize the conversion of a digital value to an analog output voltage.Application FieldThe AD7225KP-REEL is primarily designed for digitizing analog signals and providing a digital or analog output voltage. It can be used to accurately convert digital signals from sources such as a microcontroller or microprocessor into an analog output voltage or digital output.The AD7225KP-REEL is most commonly used in audio, video, and telecommunication products to convert digital audio and video signals into analog form for further processing. It is designed to be used in automobiles for audio and video applications. It is also useful in industrial instrumentation, medical imaging, and measurement situations where accurate voltage conversion is required.Working PrincipleThearray of amplifiers and switched-capacitors used in the AD7225KP-REEL is used to convert a digital input signal into an analog output voltage. Each DAC cell includes an operational amplifier that is used to provide an analog output voltage proportional to the digital input code. This analog output voltage is the desired signal after conversion.The operational amplifier in each cell amplifies the digital signal. This reference voltage is then compared to the ground voltage level, which is used as the midpoint for the switching operations of the capacitors. The capacitors are then switched on and off in sequence to provide a voltage level that corresponds to the value of the digital code. This voltage is then amplified by the operational amplifier to form the required analog output voltage.The precision of the analog output is determined by the resolution of the digital input code. The digital input code can be 8, 10, or 12-bits for the AD7225KP-REEL, depending on the required resolution. The AD7225KP-REEL can also be used in bipolar and unipolar modes, which provides a reverse polarity output.The use of the AD7225KP-REEL DAC can provide multiple benefits over other analog signal converters. The use of amplifiers and switched-capacitors provides greater accuracy and faster response times, while also conserving power. The DAC is also protected against static charges, making it suitable for use in harsh environments.In conclusion, the AD7225KP-REEL is a versatile and compact data acquisition device that can store and convert digital signals into analog outputs. Its use of an array of amplifiers and switched-capacitors provides several advantages over other signal conversion methods. The AD7225KP-REEL provides accuracy and fast response times in various applications such as audio and video processing, automobile audio and video applications, industrial instrumentation and medical imaging.

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