LTC2634CMSE-HZ12#PBF

Overview

The LTC2634CMSE-HZ12#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, requiring a supply voltage between 4.5V and 5.5V. The device includes rail-to-rail output buffers and guarantees monotonicity over the operating temperature range. Communication occurs via a 3-wire SPI/MICROWIRE compatible interface with clock rates up to 50MHz. Upon power-up, the outputs reset to zero-scale. Key electrical specifications include a maximum integral nonlinearity error of ±2.5 LSB and a settling time of 4.8µs at 5V.

Feature Summary

• Quad 12-bit resolution with integrated 4.096V precision reference
• Rail-to-rail output buffers guaranteed monotonic from -40°C to 125°C
• 3-wire SPI/MICROWIRE serial interface supporting up to 50MHz clock
• Power-on reset circuit forces outputs to zero-scale

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment

Procurement Notes

Verify the specific ordering suffix #PBF indicates lead-free construction compliant with RoHS standards. Confirm the MSE package designation corresponds to the 10-lead plastic MSOP form factor. Ensure the H-grade suffix matches the required 4.5V to 5.5V supply range and automotive temperature capabilities if applicable to the design environment.

Selection Notes

Select this component when four independent 12-bit channels are required in a compact surface-mount package. The internal 4.096V reference eliminates external reference components but restricts operation to supplies above 4.5V. Choose this variant over QFN packages if board space constraints favor the 10-lead MSOP footprint or if specific thermal dissipation characteristics of the MSOP package are preferred for the application.

Part Context

This part belongs to the LTC2634 family, which offers 12-, 10-, and 8-bit resolutions in both 16-lead QFN and 10-lead MSOP packages. The CMSE designation identifies the commercial temperature grade (0°C to 70°C) combined with the MSOP package and H-grade internal reference voltage. Other variants in the family differ by resolution, package type, temperature range, and power-on reset behavior.

Replacement Considerations

Direct pin-compatible replacements within the same package and resolution include other LTC2634-MSE variants such as LTC2634IMSE-HZ12#PBF for industrial temperature range or LTC2634HMSE-HZ12#PBF for extended automotive temperature range. Cross-package substitutes like the LTC2634CUD-HZ12#PBF require PCB redesign due to the 16-lead QFN footprint.