LTC2637IMS-LMX8#PBF

Overview

The LTC2637IMS-LMX8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) in a 16-lead MSOP package. It features an integrated precision reference with a full-scale output of 2.5V and a temperature coefficient of 10ppm/°C. The device operates on a single supply from 2.7V to 5.5V and communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical parameters include a maximum integral nonlinearity (INL) error of ±0.5 LSB, a settling time of 3.5µs at ±1 LSB for 8-bit resolution, and a power-on reset function configured to mid-scale in external reference mode.

Feature Summary

• Octal 8-Bit Architecture: Provides eight independent DAC channels with rail-to-rail buffered outputs.
• Integrated Precision Reference: Includes a 2.5V internal reference with 10ppm/°C drift; supports external reference input.
• I2C Interface: Compatible with standard (100kHz) and fast (400kHz) clock rates.
• Power-On Reset: Configurable to reset all DAC outputs to mid-scale upon power-up.

Applications

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

Procurement Notes

Verify the specific suffix 'LMX8' corresponds to the 8-bit resolution, mid-scale power-on reset, and external reference configuration as defined in the manufacturer's ordering guide. Confirm the 'MS' package designation matches the required 16-lead MSOP footprint. Ensure the '#PBF' suffix indicates lead-free compliance before procurement.

Selection Notes

Select this component when eight low-channel-count DACs are required in a compact surface-mount package. The L-series variant is suitable for systems powered by 2.7V to 5.5V supplies. Choose the MX suffix if the application requires outputs to initialize at mid-scale rather than zero-scale or mid-scale in internal reference mode.

Part Context

This part belongs to the LTC2637 family of octal DACs, which also includes 10-bit and 12-bit variants (e.g., LTC2637-10, LTC2637-12). The family shares identical pinouts and interface protocols but differs in resolution, linearity specifications, and internal reference voltage options (2.5V for L-series, 4.096V for H-series).

Replacement Considerations

Direct substitutes within the same family include LTC2637IMS-LMI8#PBF (internal reference reset to mid-scale) or LTC2637IMS-LZ8#PBF (reset to zero-scale). Cross-resolution replacements like LTC2637IMS-LMX10#PBF are pin-compatible but offer higher resolution.