LTC2634HMSE-HMX12#PBF

Overview

The LTC2634HMSE-HMX12#PBF is a quad 12-bit voltage-output digital-to-analog converter (DAC) in a 10-lead MSOP package. It features an integrated precision reference with a full-scale output of 4.096V and operates from a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, guaranteed monotonicity over the -40°C to 125°C temperature range, and a maximum integral nonlinearity error of ±2.5 LSB. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Power-on reset defaults to mid-scale in external reference mode.

Feature Summary

• Quad 12-bit resolution with integrated 4.096V precision reference
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s)
• SPI/MICROWIRE compatible 3-wire serial interface operating at 50MHz
• Guaranteed monotonic operation from -40°C to 125°C

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive

Procurement Notes

Verify the specific ordering suffix HMX12 against the manufacturer's current documentation to confirm power-on reset behavior and reference mode configuration. Ensure the 10-lead MSOP package variant matches the design requirements for thermal dissipation and pin compatibility. Confirm that the automotive-grade qualification aligns with the intended application environment.

Selection Notes

Select this component when a quad-channel DAC with high accuracy and low noise is required in a compact surface-mount package. The 4.096V internal reference simplifies design by eliminating external reference components. Consider the 4.5V minimum supply requirement and the mid-scale power-on reset characteristic for system initialization constraints.

Part Context

This part belongs to the LTC2634 family, which offers various resolutions (8-, 10-, and 12-bit) and package options (QFN and MSOP). The HMSE suffix indicates the H-grade temperature range (-40°C to 125°C), MSOP package, and MX power-on reset configuration. Other variants include L-grade for lower voltage operation and different reset behaviors.

Replacement Considerations

Direct replacements within the same family include LTC2634IMSE-HMX12#PBF for industrial temperature range or LTC2634CUD-LMX12#PBF for commercial range in QFN packages. Verify pinout compatibility and electrical specifications before substitution.

FAQ

What is the power-on reset state for the LTC2634HMSE-HMX12#PBF?

The device resets to mid-scale in external reference mode upon power-up.

What is the maximum integral nonlinearity error for the 12-bit version?

The maximum INL error is ±2.5 LSB.

Can the LTC2634HMSE-HMX12#PBF operate with an external reference?

Yes, it can operate with an external reference, which sets the full-scale output to the external reference voltage.