AD7872TQ

Number of A/D Converters:	1
Base Part Number:	AD7872
Supplier Device Package:	16-CDIP
Package / Case:	16-CDIP (0.300", 7.62mm)
Operating Temperature:	-55°C ~ 125°C
Features:	--
Voltage - Supply, Digital:	±5V
Voltage - Supply, Analog:	±5V
Reference Type:	Internal
Architecture:	SAR
Series:	--
Ratio - S/H:ADC:	1:1
Configuration:	S/H-ADC
Data Interface:	SPI, Parallel
Input Type:	Single Ended
Number of Inputs:	1
Sampling Rate (Per Second):	83k
Number of Bits:	14
Part Status:	Active
Packaging:	Tube

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AD7872TQ is an integrated, low-cost, low-power AD converter which contains an 8-bit successive approximation register (SAR). This integrated device is specifically designed to provide a low-cost, low-power mixing of an analog signal with a digital signal. It integrates a low-power and high-speed SAR, an 8-bit digital-to-analog converter (DAC), and an on-chip sample and hold (S/H) circuit. The AD7872TQ is ideal for applications that require low power and a small form factor for data conversion. Application FieldThe AD7872TQ is commonly used for applications that involve data acquisition, signal conversion, and signal processing from an analog signal. It can be used for signal conditioning, signal translation, and data aggregation applications that require low-resolution AD conversion. It is suitable for applications in process control, environmental sensing, industrial automation, and data acquisition. Due to its low power characteristics and its feature of small form factor, it is also used in battery powered applications, such as medical devices, portable systems, and handheld computing. Additionally, the AD7872TQ is suited for applications in consumer, automotive, and military applications, such as regulated power supplies, precision measurement and control systems, and integrated storage and control systems. Working PrincipleThe AD7872TQ operates on a single 3.0V to 5.25V supply, and has a low operating current, enabling it to provide a low power performance in a wide variety of applications. The device features an 8-bit SAR and an 8-bit DAC with up to ±20V minimum input and output range. The SAR consists of a comparator, a register, and a reference voltage, which are used to convert an analog input voltage into a corresponding digital output. The output of the SAR is then fed into the DAC, which then converts the digital input into an analog output. The AD7872TQ features two external clock inputs, which allow it to control the rate at which the SAR and DAC operate. The Rising Edge Clock (REC) is used to sample the analog input and convert it to a digital output. The Falling Edge Clock (FEC) is used to convert the digital output to an analog output. Additionally, the device has a sample and hold (S/H) circuit that maintains the output voltage when the SAR or DAC are inactive. In order to convert the analog input voltage into a corresponding digital output, it is necessary to determine the difference between the input voltage and a reference voltage. The AD7872TQ can operate in two modes: the Free-Run Mode and the Single-Step Mode. In the Free-Run Mode, the SAR continuously samples the analog input and converts it to a digital output until the process is paused or stopped. In the Single-Step Mode, the SAR samples the analog input and converts it to a digital output only once, after which the process is paused or stopped. ConclusionThe AD7872TQ is a low power, low-cost, high-speed integrated AD converter. It features an 8-bit SAR, an 8-bit DAC, and a sample and hold circuit. It is suitable for applications that require low-resolution AD conversion, such as data aggregation, signal conditioning, signal translation, and data acquisition. Additionally, it can be used for battery powered applications where form factor is important, as well as for consumer, automotive, and military applications. Due to its low power operation, the AD7872TQ is capable of high-speed operation, allowing it to provide low power performance in a wide range of applications. The device offers two clock modes, a Free-Run Mode, and a Single-Step Mode, allowing the user to choose between continuous sampling and single-shot sampling of an analog input voltage.

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