LTC2634CUD-HMI12#TRPBF

Overview

The LTC2634CUD-HMI12#TRPBF is a quad 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, double-buffered data latches, and an SPI/MICROWIRE compatible 3-wire serial interface supporting clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a settling time of 4.8µs at ±1LSB, and a power-on reset to mid-scale in internal reference mode. It is housed in a 16-lead 3mm × 3mm QFN package.

Feature Summary

• Quad 12-bit resolution with integrated 4.096V precision reference
• SPI/MICROWIRE compatible 3-wire serial interface with 50MHz clock rate
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s)
• Power-on reset to mid-scale in internal reference mode

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment

Procurement Notes

Verify the #TRPBF suffix indicates a 2,500-piece tape and reel packaging configuration. Confirm the H-grade temperature range (-40°C to 125°C) matches system requirements. Ensure the 4.5V minimum supply voltage aligns with the design's power architecture. Check for AEC-Q100 automotive qualification if applicable, noting that specific automotive reliability reports may require direct factory contact.

Selection Notes

Select this part for applications requiring four independent 12-bit channels with high accuracy and low drift. The H-grade variant supports a wider operating temperature range compared to C or I grades. Consider the 4.5V to 5.5V supply constraint; use the L-grade variant if a 2.7V to 5.5V supply range is necessary. Verify that the 16-lead QFN package footprint fits the PCB layout constraints.

Part Context

This component belongs to the LTC2634 family of quad DACs, which also includes 10-bit and 8-bit variants. The 'H' designation specifies the 4.096V full-scale output and extended temperature range, while 'UD' denotes the 16-lead QFN package. The 'MI' suffix indicates the power-on reset behavior to mid-scale in internal reference mode.

Replacement Considerations

Direct substitutes within the same family include LTC2634CUD-HMX12#TRPBF (external reference reset) or LTC2634IUD-HMI12#TRPBF (industrial temperature grade). Cross-package replacements like the MSOP version require pinout adaptation.