AD7847AR

Reference Type:	External
Base Part Number:	AD7847
Supplier Device Package:	24-SOIC
Package / Case:	24-SOIC (0.295", 7.50mm Width)
Operating Temperature:	-40°C ~ 85°C
Architecture:	R-2R
INL/DNL (LSB):	±1 (Max), ±1 (Max)
Voltage - Supply, Digital:	--
Voltage - Supply, Analog:	±14.25 V ~ 15.75 V
Series:	--
Data Interface:	Parallel
Differential Output:	No
Output Type:	Voltage - Buffered
Settling Time:	5µs
Number of D/A Converters:	2
Number of Bits:	12
Part Status:	Obsolete
Packaging:	Tube

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AD7847AR application field and working principle

Data Acquisition - Digital to Analog Converters (DAC) are used in a variety of applications to convert a digital stimulus into an analog output. The AD7847AR is a family of high-performance 8-bit, single-supply DACs from Analog Devices Inc. (ADI). It is available in various packages, including a small 8-lead SOIC, a 16-lead QSOP, a 20-lead TSSOP, and a 32-lead TQFN. It is optimized for low-power applications and performs rail-to-rail analog output. The AD7847AR\'s wide voltage range and fast settling time make it an excellent choice for low-voltage applications.The device offers several features, including on-chip rail-to-rail buffers, low power operation, an internally trimmed reference, and a programmable output buffer to extend the output range of the device. The AD7847AR also has an on-chip power-on reset circuit and an on-chip voltage reference, eliminating the need for an external reference and simplifying the design process. Additionally, the device has several other features that make it suitable for a wide range of applications. These include a temperature range of -40°C to +85°C, a calibration register, power-down features, and low-voltage battery operation.The AD7847AR family of DACs is capable of converting analog input signals into a digital representation of the analog signal for the purpose of conversion back to an analog output voltage. To do this, it uses a variety of methods, including pulse-width modulation (PWM), delta-sigma modulation (DSM), and hybrid methods. These various methods enable the device to provide appropriate resolution, dynamic range, and speed for a given application.PWM is used to convert analog input signals into PWM signals, while DSM uses oversampled, noise-shaping techniques to convert analog input signals into digital representations. The AD7847AR is capable of operating in both PWM and DSM modes. Additionally, the device can be used in a hybrid mode, which combines both techniques to further improve the resolution and accuracy of the device.The AD7847AR incorporates several features to ensure excellent performance and reliability. The device is capable of up to 8-bit resolution and is designed to minimize thermal distortion and minimize offset drifts. In order to meet the desired specifications, the device also features low power consumption and fast settling time, as well as a calibration register for optimization.The AD7847AR is typically used in applications such as digital potentiometers, programmable logic controllers (PLCs), analog-to-digital converters (ADCs)/digital-to-analog converters (DACs), remote controls, and medical equipment. Additionally, it has been used in battery-powered systems to provide a low-voltage, liquid analog output and control in a wide range of operating temperatures. The device is also suitable for use in portable electronic applications, such as cell phone signal processing, where its low-power consumption and fast settling time makes it ideal.Overall, the AD7847AR is a highly capable 8-bit DAC. Thanks to its fast settling time, low power consumption, and wide voltage range, it is an excellent choice for applications demanding a low-voltage, rail-to-rail analog output. With its reliability, low distortion, and calibration register, it can meet the specific requirements of a wide range of applications.

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