LTC2636HMS-LZ12#PBF

Overview

The LTC2636HMS-LZ12#PBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc., housed in a 16-lead MSOP package. It features an integrated precision reference with a full-scale output of 4.096V and a temperature coefficient of 10ppm/°C. The device operates on a single supply voltage ranging from 4.5V to 5.5V. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a settling time of 4.8µs at 5V, and ultralow DAC-to-DAC crosstalk below 2.4nV•s. It communicates via a 3-wire SPI/MICROWIRE-compatible interface supporting clock rates up to 50MHz.

Feature Summary

• Octal 12-Bit Resolution: Provides eight independent 12-bit DAC channels with guaranteed monotonicity over the operating temperature range.
• Integrated Precision Reference: Features an internal 4.096V reference with a low drift of 10ppm/°C; supports external reference input for flexible full-scale configuration.
• High Performance: Delivers a maximum INL error of ±2.5 LSB, settling time of 4.8µs, and ultralow crosstalk (<2.4nV•s) between channels.
• Power-On Reset Options: Configurable to reset outputs to zero-scale or mid-scale upon power-up, ensuring predictable system initialization.

Applications

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

Procurement Notes

Verify the specific suffix 'LZ12' indicates zero-scale power-on reset and 12-bit resolution. Confirm the 'H' grade meets automotive temperature requirements (-40°C to 125°C). Ensure the MSOP package variant matches the PCB footprint design. Check for RoHS compliance documentation as indicated by the '#PBF' designation.

Selection Notes

Select this part when eight independent 12-bit DAC channels are required in a compact surface-mount package. Choose the 'H' grade for applications requiring operation up to 125°C. The 'LZ' suffix is critical if zero-scale output is desired at power-up. Ensure the supply voltage remains within the 4.5V to 5.5V range specified for the H-grade internal reference mode.

Part Context

This component belongs to the LTC2636 family of octal DACs, which also includes 10-bit and 8-bit variants. The family shares similar pinouts and interfaces but differs in resolution, accuracy, and power-on reset behavior. The MSOP package offers a larger footprint compared to the DFN option, providing additional pins for LDAC and CLR control functions not available in the smaller package.

Replacement Considerations

Direct substitutes within the same family include LTC2636HMS-LZ10#PBF (10-bit) and LTC2636HMS-LZ8#PBF (8-bit), provided lower resolution is acceptable. For different reset behaviors, consider LTC2636HMS-HMI12#PBF (mid-scale reset). Verify thermal resistance and current drive capabilities when replacing with other octal DAC families.