LTC2634CUD-HMX8#TRPBF

Overview

The LTC2634CUD-HMX8#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 utilizes a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Key electrical parameters include a settling time of 3.3µs, maximum integral nonlinearity (INL) of ±0.5 LSB, and differential nonlinearity (DNL) of ±0.5 LSB. It incorporates double-buffered data latches and offers ultralow crosstalk between DAC channels. The part is housed in a 16-lead 3mm × 3mm QFN package.

Feature Summary

• Quad 8-bit resolution with rail-to-rail output buffers guaranteed monotonic over the operating temperature range.
• Integrated 10ppm/°C precision reference providing a 2.5V full-scale output.
• Ultralow DAC-to-DAC crosstalk of 2.4nV•s typical value.
• Power-on reset configured to mid-scale in external reference mode.

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates a tape and reel packaging format containing 2,500 pieces. Confirm the C temperature grade corresponds to the commercial range of 0°C to 70°C. Ensure the HMX power-on reset configuration matches system initialization requirements for mid-scale output in external reference mode.

Selection Notes

Select this component when a quad 8-bit DAC with low power consumption and high speed is required. The HMX variant is suitable for systems requiring a defined mid-scale output upon power-up using an external reference. Verify that the 2.7V to 5.5V supply range and 3-wire serial interface are compatible with the host controller.

Part Context

This part belongs to the LTC2634 family, which includes 12-, 10-, and 8-bit variants. The CUD designation specifies the Commercial temperature grade and 16-lead QFN package. The HMX suffix defines the power-on reset behavior as mid-scale in external reference mode, while Z12/Z10/Z8 would indicate zero-scale reset.

Replacement Considerations

Direct replacements within the same family include LTC2634CUD-LMX8#TRPBF (internal reference reset), LTC2634CUD-HZ8#TRPBF (zero-scale reset), or higher resolution variants like LTC2634CUD-HMX10#TRPBF if pin compatibility and performance margins allow.