AD7845JRZ-REEL

Overview

The AD7845JRZ-REEL is a 12-bit CMOS multiplying digital-to-analog converter (MDAC) with an integrated output amplifier, fabricated on the LC2MOS process. It features full 4-quadrant multiplication capability and includes three on-chip application resistors for gain ranging and offset adjustment. The device accepts parallel digital inputs compatible with TTL and 5 V CMOS logic. Key electrical specifications include a maximum settling time of 5 µs to 0.01% of full-scale range, a typical slew rate of 11 V/µs, and a unity gain small-signal bandwidth of 600 kHz. It operates within a supply voltage range of ±14.25 V to ±15.75 V.

Feature Summary

• Integrated 12-bit MDAC with on-chip output amplifier supporting full 4-quadrant multiplication
• Three internal application resistors (RA, RB, RC) facilitate gain ranging and offset adjustments
• Guaranteed monotonic operation across the entire specified temperature range
• Parallel digital interface with TTL and 5 V CMOS compatibility

Applications

• Automatic Test Equipment
• Digital Attenuators
• Programmable Power Supplies
• Programmable Gain Amplifiers
• Digital-to-4–20 mA Converters

Procurement Notes

Verify that the ordering suffix -REEL indicates reel packaging rather than tube packaging. Confirm the specific temperature grade associated with the base model number, as performance parameters vary between commercial, industrial, and extended ranges. Ensure the component meets required ESD handling protocols during assembly due to sensitivity to electrostatic discharge.

Selection Notes

Select this component when a single-chip solution combining a multiplying DAC and buffer amplifier is required to reduce board space. Verify that the parallel interface timing requirements align with the microprocessor system. Consider the on-chip application resistors if gain scaling or offset trimming functionality is needed without external components.

Part Context

The AD7845 series represents Analog Devices' first 4-quadrant multiplying DAC with an integrated amplifier. The JRZ variant specifically denotes the SOIC-24 surface-mount package option within the broader AD7845 family, which also includes DIP and PLCC packages. This integration allows for precision linear components and digital circuitry to be implemented on the same chip using the LC2MOS process.

Replacement Considerations

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