AD7945BR-REEL

Overview

The AD7945BR-REEL is a 12-bit multiplying digital-to-analog converter (DAC) from Analog Devices, featuring a parallel interface. It operates on a single +5 V supply with guaranteed linearity of ±0.5 LSBs INL and DNL. The device delivers a typical power consumption of 5 mW and achieves a settling time of 600 ns to 0.01%. Key specifications include a 40 ns write pulsewidth, low glitch impulse of 60 nV-s, and an operating temperature range of -40°C to +85°C.

Feature Summary

• 12-bit resolution with ±0.5 LSB max INL and DNL
• Parallel data interface with 40 ns write pulsewidth
• Low power consumption: 5 mW typical at +5 V
• Fast settling time: 600 ns to 0.01% full-scale

Applications

• Battery-powered instrumentation
• Laptop computers
• Upgrades for all 754x series DACs in 5 V designs

Procurement Notes

Verify the reel packaging suffix against the specific manufacturing lot requirements. Confirm that the B grade temperature range (-40°C to +85°C) aligns with the system's thermal constraints. Ensure the parallel interface timing parameters meet the host controller's setup and hold time specifications.

Selection Notes

Select this component when a 12-bit parallel input is required for high-speed updating. The AD7945 is suitable for replacing legacy AD7545 devices in existing 5 V systems. Consider the AD7943 if a serial interface is preferred, or the AD7948 for byte-wide parallel access.

Part Context

This part belongs to the AD7943/AD7945/AD7948 family of fast 12-bit multiplying DACs. While the AD7943 uses a serial interface and the AD7948 uses an 8-bit byte interface, the AD7945 specifically utilizes a 12-bit parallel bus for direct data loading.

Replacement Considerations

Publicly confirmed substitutes include AD7945BN, AD7945BRS, AD7945ARS-B, and AD7945TQ.