LTC2634IUD-HZ8#TRPBF

Overview

The LTC2634IUD-HZ8#TRPBF is a quad 8-bit voltage output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 2.5V and operates on a single 2.7V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the -40°C to 85°C industrial temperature range, and a power-on reset to zero-scale. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. It is housed in a 16-lead 3mm × 3mm QFN package.

Feature Summary

• Quad 8-bit resolution with integrated 2.5V full-scale reference
• Rail-to-rail output buffers with guaranteed monotonicity
• Power-on reset to zero-scale for consistent initialization
• Industrial temperature grade (-40°C to 85°C)

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging containing 2,500 pieces. Confirm the 'I' designation corresponds to the industrial temperature range of -40°C to 85°C. Ensure the 'H' in the internal reference code denotes the 2.5V full-scale option and 'Z' confirms the zero-scale power-on reset behavior as defined in the ordering information table.

Selection Notes

Select this part when four independent 8-bit DAC channels are required with low power consumption and high accuracy. The 2.5V full-scale output is suitable for single-supply systems operating between 2.7V and 5.5V. Choose this model over the 12-bit or 10-bit variants if cost or speed is prioritized, noting that the 8-bit version offers ±0.5 LSB INL/DNL performance.

Part Context

This component belongs to the LTC2634 family, which also includes 10-bit and 12-bit resolutions. The IUD package variant specifically utilizes the 16-lead QFN form factor. Other suffixes in the family may offer different reset behaviors (mid-scale) or higher voltage references (4.096V), but this specific part number is configured for zero-scale reset and 2.5V operation.

Replacement Considerations

Direct pin-compatible replacements within the same family include LTC2634IUD-LZ8#TRPBF (mid-scale reset) or LTC2634IUD-HZ8#TRPBF (4.096V full-scale). Verify that the system can tolerate the different power-on output states or reference voltage scaling before substituting.