AD7834ANZ

Reference Type:	External
Base Part Number:	AD7834
Supplier Device Package:	28-PDIP
Package / Case:	28-DIP (0.600", 15.24mm)
Operating Temperature:	-40°C ~ 85°C
Architecture:	R-2R
INL/DNL (LSB):	±2 (Max), ±0.9 (Max)
Voltage - Supply, Digital:	5V
Voltage - Supply, Analog:	±11.4 V ~ 15.75 V
Series:	--
Data Interface:	SPI
Differential Output:	No
Output Type:	Voltage - Buffered
Settling Time:	10µs (Typ)
Number of D/A Converters:	4
Number of Bits:	14
Part Status:	Active
Packaging:	Tube

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AD7834ANZ Application Field and Working Principle

Data Acquisition - Digital to Analog Converters (DAC) have become increasingly important in the modern world of industrial automation. The AD7834ANZ is one such device that offers enhanced features and improved performance. It is a high-performance 8-bit current-output DAC with a SPI-compatible serial digital interface. This device is suitable for a wide range of industrial applications, such as process control, motor control, digital potentiometers, and pressure and flow sensors.

Device Overview

The AD7834ANZ is a single 8-bit digital-to-analog current output device. It is housed in a 24-lead LFCSP (Leadless Fine-Pitch Ceramic Quad Flat Pack) and provides the flexibility to implement a variety of circuits with a small footprint. The device has a 4-wire serial interface to an external digital controller. The device provides a bidirectional serial port that allows the user to program the current source and read back the current code. The AD7834ANZ also provides a 3-wire interface that provides the user with the ability to toggle between the internal reference and external reference pins.

Features and Benefits

The AD7834ANZ offers some useful features, such as a flexible 4-wire serial interface, a 3-wire reference selection interface, an internal linearity error of ±0.3%, and a 14-bit wide onboard control and programming register. Additionally, the device is optimized for very low power consumption and offers a low voltage tolerance of ±2.5V from 0V to 5V. The device also supports a wide temperature range of -55°C to +125°C.

Applications and Advantages

Parameters such as high linearity, low power consumption, and wide temperature range make the AD7834ANZ a device suitable for use in a wide range of industrial applications. Such applications include process control, motor control, pressure and flow sensors, and digital potentiometers. The device\'s flexibility and low power consumption offer advantages such as reduced PCB cost and improved circuit performance.

Working Principle

The AD7834ANZ operates on the principle of a Dot-Demux architecture. This architecture makes efficient use of a single, small memory block to power both the current output and the 3-wire reference selection interface. The Dot-Demux architecture is designed to provide the desired output voltage by converting the received digital code into the precise current source required. An internal voltage regulator is also incorporated, which provides precise control and sustained stability over the entire operating temperature range.

Conclusion

The AD7834ANZ is a highly integrated, high-performance 8-bit current output digital to analog converter (DAC). Its features and capabilities make it suitable for a variety of industrial applications, such as process control, motor control, pressure and flow sensors, and digital potentiometers. Its flexible 4-wire serial interface and 3-wire reference selection interface, along with its low power consumption and wide temperature range, offer numerous benefits to users, such as improved circuit performance and reduced PCB cost. The device operates on the principle of Dot-Demux architecture, which uses a single small memory block to power both the current output and the 3-wire reference selection interface. Overall, the AD7834ANZ is an ideal choice for a wide range of industrial applications that demand high performance and low power consumption.

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