LTC2634IUD-HMI12#PBF

Overview

The LTC2634IUD-HMI12#PBF 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, guaranteed monotonicity over the –40°C to 85°C industrial temperature range, and communicates via a 50MHz SPI/MICROWIRE compatible 3-wire serial interface. Power-on reset defaults to mid-scale in internal reference mode.

Feature Summary

• Quad 12-bit resolution with ±2.5 LSB maximum integral nonlinearity error
• Integrated 4.096V full-scale reference with 10ppm/°C drift
• 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 package type matches the design requirements, as this part uses a 16-lead QFN. Confirm the operating temperature range aligns with the industrial grade specification. Ensure the power supply sequencing respects the REF pin voltage limits relative to VCC during startup to prevent damage.

Selection Notes

Select this model for applications requiring four independent 12-bit channels with high accuracy and low noise. The H suffix indicates a 4.096V full-scale output suitable for higher dynamic range needs compared to the L variant. The MI suffix ensures outputs initialize to mid-scale upon power-up, which may be required for specific downstream circuit safety.

Part Context

This component belongs to the LTC2634 family, which offers 12-, 10-, and 8-bit resolutions in both QFN and MSOP packages. The IUD designation specifies the Industrial temperature grade and 16-lead QFN packaging. Other variants include different reset behaviors and full-scale voltages to suit various system initialization and signal range requirements.

Replacement Considerations

LTC2634IUD-LMI12#PBF: Same package and temp grade but resets to mid-scale in external reference mode. LTC2634IUD-HZ12#PBF: Same package and temp grade but resets to zero-scale.