AD7245JP

Overview

The AD7245JP is a 12-bit CMOS digital-to-analog converter (DAC) from the DACPORT family, fabricated using LC2MOS technology. It integrates a voltage output amplifier and a buried Zener voltage reference on a single monolithic chip. The device features a parallel data interface with double-buffered logic, accepting 12-bit data via DB0–DB11. Key electrical specifications include a settling time of 7 µs to within ±1/2 LSB, a relative accuracy of ±3/4 LSB at 25°C, and operation from dual supplies ranging from +10.8 V to +16.5 V for VDD and –10.8 V to –16.5 V for VSS. The part supports unipolar (0 V to 5 V, 0 V to 10 V) and bipolar (±5 V) output ranges.

Feature Summary

• 12-bit resolution with integrated output amplifier and internal 5 V reference
• Parallel interface with asynchronous LDAC and CLR control signals
• Settling time of 7 µs max for positive full-scale change
• Relative accuracy of ±3/4 LSB max over temperature range

Applications

• Microprocessor-controlled analog signal generation
• Programmable power supply regulation
• Industrial process control systems requiring precise voltage references

Procurement Notes

Verify the specific package option associated with the 'JP' suffix against the manufacturer's ordering guide, as standard listings typically specify N (Plastic DIP), Q (Cerdip), P (PLCC), or R (SOIC). Confirm that the required temperature grade and linearity accuracy match the intended application environment before procurement.

Selection Notes

Select this component when a single-chip solution for 12-bit conversion is required without external trimming. Ensure the system design accommodates the specified supply voltage range of 10.8 V to 16.5 V. Consider the parallel interface timing requirements, specifically the 30 ns typical data setup time, for compatibility with the host microprocessor.

Part Context

The AD7245A/AD7248A series represents an enhanced version of the industry-standard AD7245/AD7248. Improvements include operation from 12 V to 15 V supplies, faster interface times, and extended temperature ranges for commercial and industrial grades. The AD7245A variant specifically utilizes an 8+4 bit parallel loading structure.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.