DAC0832LCN/NOPB

Digital To Analog Converters Overview

The DAC0832LCN/NOPB is an 8-bit digital-to-analog converter featuring a double-buffered architecture and R-2R resistor ladder network. It operates on a single power supply ranging from 5 VDC to 15 VDC with a maximum power dissipation of 20 mW. The device provides current outputs (IOUT1, IOUT2) and utilizes an external reference voltage input spanning ±10 VDC. Key electrical specifications include a typical current settling time of 1 µs, a linearity error of 0.2% FSR, and a gain error of ±1% FSR. It supports parallel digital data inputs compatible with TTL logic levels.

Digital To Analog Converters Feature Summary

• Double-buffered digital data inputs allow simultaneous updating of multiple converters in a system.
• Microprocessor-compatible interface directly supporting popular architectures like 8080, 8048, and Z80.
• Enables full four-quadrant multiplication using a wide range bipolar reference voltage.
• Pin-compatible with the 12-bit DAC1230 series for easy resolution upgrades.

Digital To Analog Converters Applications

• Direct interfacing with microprocessors such as 8080, 8048, and Z80.
• Current switching applications requiring virtual ground connections.
• Voltage switching mode circuits utilizing external operational amplifiers.
• Multiplexed analog signal control systems.

Digital To Analog Converters Procurement Notes

Verify the specific suffix 'LCN' confirms the PDIP-20 through-hole package and commercial temperature range (0°C to +70°C). Confirm that the '/NOPB' designation indicates lead-free compliance and RoHS adherence. Ensure the source document matches the SNAS534B revision date to validate the electrical characteristics against the manufacturer's standard warranty.

Digital To Analog Converters Selection Notes

Select this component when an 8-bit resolution with double buffering is required for direct microprocessor integration. It is suitable for applications needing pin compatibility with the 12-bit DAC1230 family. Consider the unbuffered current output nature and the necessity for an external op-amp if a voltage output is desired. Verify that the 1 µs settling time meets the system's throughput requirements.

Digital To Analog Converters Part Context

This part belongs to the Texas Instruments MICRO-DAC family, specifically the 8-bit members designed for microprocessor compatibility. It shares architectural similarities with the DAC0830 but differs in linearity specifications. The device represents an advanced CMOS/Si-Cr technology offering low power consumption and low output leakage current errors compared to earlier discrete implementations.

Digital To Analog Converters Replacement Considerations

The DAC1230 is a pin-compatible 12-bit upgrade option within the same family. Substitution requires tying address bit A0 to the ILE pin to manage the two-byte write instruction. No hardware or software changes are needed for basic addressing if configured correctly.

Digital To Analog Converters FAQ

How does the double-buffering feature benefit multi-DAC systems?

It allows one register to hold the current data while the next word is loaded into the second register, enabling simultaneous updates of any number of DACs via a common strobe signal.

What is the purpose of the internal Rfb resistor?

The internal 15 kΩ feedback resistor should always be used with an external op-amp because it matches and tracks the on-chip R-2R ladder resistors over temperature, ensuring better linearity than external resistors.

Can the DAC0832 operate with a 5V supply while using a higher reference voltage?

Yes, the device can operate with a VCC of 5VDC while accepting a reference voltage (VREF) up to ±10VDC due to the silicon-chromium thin film R-2R ladder design.