Analog to Digital Converter

A/D, ADC, or A to D are ways to express a device known as an analog to digital converter. An ADC is a kind of integrated circuit that converts analog signals such as temperature, pressure, intensity, into a digital representation of these signals. The output of ADC is then fed to a device that registers its input only in digital signals. This device reads, evaluates, and performs specific tasks depending on these signals. There are numerous A/D's, each having its own specification. One such type of an analog to digital converter is AD9244BSTZ-65.

The AD9244BSTZ-65 is a monolithic, 14 bit, Single 5 volt supply ADC. It comes in both 40/65 Mega samples per second (MSPS) and has a voltage reference and a high-performance sample and hold amplifier (SHA). The AD9244BSTZ-65 guarantees no missing codes over its operating temperature range by using a multistage differential pipelined architecture. This structure uses output error correction to provide 14-bit accuracy at data rates of 40 MSPS/65 MSPS. The AD9244BSTZ-65 has a built-in programmable voltage reference with the option to attach an external reference to better suit any desired application. All internal conversion cycles of the AD9244BSTZ-65 are controlled using either differential or single-ended clock input. The AD9244BSTZ-65 can represent the digital output data in straight binary format or two complement formats. The AD9244BSTZ-65 determines its low or high overflow condition using an Out of range (OTR) signal. The AD9244BSTZ-65 is also available in other variants for operations over industrial temperature ranges (–40°C to 85°C).

 

The AD9244BSTZ-65 has a low power mode that enables high-speed solutions to consume only a fraction of the power compared to other analog to digital converters in the market. This low power mode allows the AD9244BSTZ-65 to operate at 550mW. The AD9244BSTZ-65 can operate at a sampling rate of 65MSPS at an input frequency of 100 MHz. The AD9244BSTZ-65 ensures excellent compatibility by providing seamless migration from the 12 bit, 65 MSPS. The built-in sample and hold amplifier in the AD9244BSTZ-65 can be configured for either differential or single-ended inputs. The out-of-range (OTR) indicator in the AD9244BSTZ-65 gives an error when the input signal exceeds the input range. The analog input bandwidth of the AD9244BSTZ-65 is up to 750 MHz, and it offers a differential full-scale analog input of a range between 1 V to 2 V p-p simplifying its system power supply design by using a single 5 V power supply system. The AD9244BSTZ-65 accommodates both 3.3 V and 5 V logic families by featuring a separate digital output driver supply.

 

These features of the AD9244BSTZ-65 make it suitable for various applications such as communication subsystems (picocell, microcell), medical and high-end imaging equipment, and test and measurement equipment.

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