DAC7725N

Digital To Analog Converters Overview

The DAC7725N is a 12-bit quad voltage output digital-to-analog converter manufactured by Texas Instruments. It features four independent channels with R-2R architecture and buffered voltage outputs. The device accepts 12-bit parallel input data and supports double-buffered DAC input logic for simultaneous updates. An asynchronous reset function clears all registers to a zero-scale code of 000H. It operates from a single +15V supply or dual ±15V supplies, with a digital supply of +5V. Key electrical parameters include a settling time of 10 μs to 0.012%, linearity error of ±2 LSB, and differential nonlinearity of ±1 LSB. The component is housed in a 28-pin PLCC package and functions within a temperature range of -40°C to +85°C.

Digital To Analog Converters Feature Summary

• Double-buffered data inputs allow simultaneous updating of all DAC channels via the LDAC signal.
• Asynchronous reset capability sets all DAC outputs to zero-scale (code 000H) when activated.
• Internal input registers support a readback mode for diagnostic verification of written data.
• Guaranteed 12-bit monotonic performance across the specified industrial temperature range.

Digital To Analog Converters Applications

• Data acquisition systems requiring multi-channel analog generation
• Closed-loop servo-control applications
• Automatic test equipment

Digital To Analog Converters Procurement Notes

Verify the specific ordering suffix against current manufacturer documentation, as status classifications may change. Confirm that the PLCC-28 package availability aligns with current design requirements. Ensure compatibility with existing PCB footprints before finalizing procurement decisions.

Digital To Analog Converters Selection Notes

Select this component when a quad-channel 12-bit DAC with parallel interface and buffered outputs is required. Consider the DAC7724 if mid-scale reset is preferred over zero-scale reset. Verify power supply configurations match the single or dual supply requirements of the target application.

Digital To Analog Converters Part Context

The DAC7725 belongs to the DAC772x family of high-performance digital-to-analog converters. It shares architectural similarities with the DAC7724, differing primarily in the reset behavior. Both devices utilize an R-2R ladder structure and are designed for precision analog control tasks in industrial environments.

Digital To Analog Converters Replacement Considerations

The DAC7725NB serves as a direct replacement offering improved linearity specifications while maintaining the same pinout and functionality. Designers should verify that the enhanced accuracy meets system requirements without necessitating layout changes.

Digital To Analog Converters FAQ

What is the default state of the DAC outputs upon an asynchronous reset?

An asynchronous reset clears all internal registers and sets the DAC outputs to a zero-scale code of 000H.

How does the double-buffered architecture benefit system operation?

It allows individual DAC input registers to be written at any time while enabling all DAC outputs to update simultaneously when the LDAC signal is asserted low.

What is the maximum settling time specification for the DAC7725N?

The settling time is specified as 10 μs to 0.012% of the full-scale output step.