LTC2634HUD-LMX8#TRPBF

Overview

The LTC2634HUD-LMX8#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 125°C temperature range, and low noise characteristics. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. This specific variant utilizes a 16-lead QFN package and is supplied in tape and reel format.

Feature Summary

• Quad 8-bit resolution with integrated 2.5V full-scale precision reference
• Rail-to-rail output buffers with ultralow crosstalk between DACs
• SPI/MICROWIRE compatible 3-wire serial interface operating up to 50MHz
• Power-on reset to mid-scale in external reference mode

Applications

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

Procurement Notes

Verify the #TRPBF suffix indicates a 2,500-piece tape and reel packaging configuration. Confirm the H-grade designation corresponds to the automotive temperature range of -40°C to 125°C. Ensure the L suffix specifies the 2.5V full-scale internal reference and the MX suffix defines the mid-scale power-on reset behavior in external reference mode.

Selection Notes

Select this component for applications requiring four independent 8-bit channels with high accuracy and low power consumption. The H-grade ensures operation across the extended automotive temperature range. Verify that the 2.5V full-scale output aligns with system requirements, as the H-suffix variants require a 4.5V to 5.5V supply while L-suffix variants operate from 2.7V to 5.5V.

Part Context

This part belongs to the LTC2634 family of quad DACs available in 12-, 10-, and 8-bit resolutions. The HUD package denotes a 16-lead 3mm x 3mm QFN form factor. The L suffix indicates a 2.5V full-scale output capability, distinguishing it from H-suffix parts which offer 4.096V full-scale output. The MX suffix specifies the power-on reset state relative to external reference usage.

Replacement Considerations

LTC2634CUD-LMX8#PBF: Commercial grade version with identical electrical specifications but limited to 0°C to 70°C operating temperature.

FAQ

What is the power-on reset behavior for the LTC2634HUD-LMX8?

The MX suffix indicates that upon power-up, the DAC outputs reset to mid-scale when operating in external reference mode.

What is the maximum serial clock frequency supported by this DAC?

The LTC2634 supports SPI/MICROWIRE compatible serial interfaces with clock rates up to 50MHz.

Does this device guarantee monotonicity?

Yes, the LTC2634 is guaranteed monotonic over the entire operating temperature range of -40°C to 125°C.