AD7249BN

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The AD7249BN Digital to Analog Converter (DAC) is a high-performance, precision voltage output device with excellent linearity, stability and smoothness. A wide range of applications, including automotive, industrial, audio, communications, medical and consumer, can benefit from its low power consumption, high accuracy and fast settling time.

This 6-bit DAC is capable of producing both positive and negative output voltages with a maximum resolution of 0.25mV/bit. Its accuracy of 0.01% maximizes performance while its low power consumption of 7mA (at 5V) makes it suitable for many battery operated applications. The AD7249B has a fast settling time of 10µs and a wide supply voltage range of ±4.5V to ±15V.

The AD7249BN application is limited only by the imagination, from controlling motor speed and direction, to adding a foot pedal control to a theatrical performance, to controlling amplifiers and VFOs in audio and communications applications. Data acquisition and control applications, such as anti-lock braking systems and flow/pressure sensing, can also take advantage of the versatility and fast settling time of the AD7249B.

The working principle of the AD7249B is fairly straightforward. The device accepts digital inputs in parallel and converts them into an analog voltage that is accurately proportional to the digital input. The device has two parts: the digital input section, which processes the parallel digital inputs, and the output section, which generates the output voltage.

The digital inputs are first decoded into an analog control voltage, which is then amplified and filtered to provide a stable and precise output voltage. The output voltage is held within 3σ of accuracy for an extended period of time, ensuring a high degree of accuracy in the final analog output. As the digital inputs are varied, the output voltage is changed accordingly.

The AD7249B has a high-impedance output, meaning that no buffers or drivers are required to drive a large load or line. Additionally, the device can handle larger slew rates, allowing it to respond quickly to rate changes in the digital inputs. Finally, the device has an open-collector temperature sensor that allows temperature compensation, ensuring overall accuracy and stability.

In summary, the AD7249BN is an excellent device for a wide range of applications where accuracy, linearity, and stability are important. Its low power consumption and wide supply voltage range make it suitable for battery operated applications, and its fast settling time make it ideal for data acquisition and control applications. Finally, its open-collector temperature compensation ensures accuracy and stability.

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