LTC2634IMSE-LZ12#TRPBF

Overview

The LTC2634IMSE-LZ12#TRPBF is a quad 12-bit voltage output digital-to-analog converter (DAC) in a 10-lead MSOP package. It features an integrated precision reference providing a 2.5V full-scale output with a temperature coefficient of 10ppm/°C. The device operates from a single 2.7V to 5.5V supply and includes rail-to-rail output buffers guaranteed monotonic over the –40°C to 85°C industrial temperature range. Communication is handled via a 3-wire SPI/MICROWIRE compatible interface supporting clock rates up to 50MHz. Power-on reset defaults to zero-scale, and it incorporates double-buffered data latches for synchronized updates.

Feature Summary

• Quad 12-bit resolution with ±2.5 LSB maximum integral nonlinearity error
• Integrated 10ppm/°C precision reference yielding 2.5V full-scale output
• Rail-to-rail output buffers with ultralow crosstalk (2.4nV•s)
• Power-on reset to zero-scale in internal reference mode

Applications

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

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging containing 2,500 pieces. Confirm the IMSE designation corresponds to the 10-lead MSOP package type. Ensure the LZ12 code matches the required 12-bit resolution, 2.5V full-scale, and zero-scale power-on reset configuration for the intended application environment.

Selection Notes

Select this part when a quad DAC configuration is required with a fixed 2.5V internal reference. The LZ suffix ensures outputs initialize to zero upon power-up, which is critical for protecting downstream circuits during system startup. Choose the MSE package for space-constrained designs requiring surface mount technology in a small footprint compared to the QFN option.

Part Context

This component belongs to the LTC2634 family, which offers variations in resolution (8, 10, or 12 bits), full-scale voltage (2.5V or 4.096V), and power-on reset behavior. The IMSE-LZ12 variant specifically targets applications needing 12-bit accuracy with a lower 2.5V span and safe zero-state initialization, distinguishing it from mid-scale reset or higher voltage variants within the same series.

Replacement Considerations

Direct pin-compatible substitutes within the same package include other LTC2634 variants such as LTC2634IMSE-LMI12#TRPBF or LTC2634IMSE-HZ12#TRPBF, provided the power-on reset state and full-scale voltage requirements align with the system design constraints.