AD7245JP-REEL

Overview

The AD7245JP-REEL is a 12-bit DACPORT digital-to-analog converter manufactured by Analog Devices Inc. It integrates a voltage output amplifier and an internal Zener reference on a monolithic CMOS chip, eliminating the need for external user trims. The device features a parallel loading structure with high-speed data latches and double-buffered interface logic. It operates from single or dual supplies within a range of +10.8 V to +16.5 V for VDD and -10.8 V to -16.5 V for VSS. Key performance metrics include a settling time of 7 µs (A/B versions) or 10 µs (T version), ±1/2 LSB relative accuracy for the B grade, and low power consumption of 65 mW typical in single supply mode.

Feature Summary

• 12-bit resolution with ±1/2 LSB relative accuracy (B Grade) and guaranteed monotonicity.
• Integrated 5 V buried Zener diode reference and buffered voltage output amplifier.
• Parallel interface with asynchronous LDAC and CLR signals for flexible control.
• Extended temperature range operation from –40°C to +85°C.

Applications

• Microprocessor-compatible systems requiring direct interfacing.
• Industrial process control applications needing precise analog outputs.
• Test and measurement equipment utilizing fast settling times.
• Systems requiring power-on reset functionality via the CLR pin.

Procurement Notes

Verify the specific suffix 'JP' against official documentation, as standard listings typically utilize 'AN', 'AB', 'AR', or 'AQ'. Confirm package availability, as the datasheet specifies DIP, SOIC, PLCC, and LCCC options. Check for military processing requirements if '/883B' is needed. Ensure supply voltage ranges match the application's single or dual supply configuration.

Selection Notes

Select the AD7245A variant for an 8+4 bit parallel data structure. Choose the B grade for improved linearity (±1/2 LSB) over the A grade (±3/4 LSB). Consider the T version for extended temperature ranges (-55°C to +125°C) if required. Ensure the output voltage range (0-5V, 0-10V, or ±5V) matches the system requirements by configuring ROFS and RFB pins appropriately.

Part Context

The AD7245A is part of the DACPORT family, representing an enhanced version of the industry-standard AD7245. Improvements include operation from 12 V to 15 V supplies, faster interface times (30 ns typical data setup), and better full-scale/reference variations with VDD. It is fabricated in linear compatible CMOS (LC2MOS) technology, combining precision bipolar circuits with low-power CMOS logic.

Replacement Considerations

The AD7248A is a related model with an 8-bit wide data bus loading structure. For higher accuracy, verify if the B-grade version is available in the desired package. No direct cross-model substitutes are listed in the provided documentation; consult Analog Devices for current equivalents.