LTC2637IMS-LZ12#TRPBF

Overview

The LTC2637IMS-LZ12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a temperature coefficient of 10ppm/°C, providing a full-scale output of 2.5V. The device operates on a single supply ranging from 2.7V to 5.5V and utilizes a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity error of ±2.5 LSB, low noise performance of 0.75mVP-P (0.1Hz to 200kHz), and rail-to-rail output buffers. It incorporates double-buffered data latches and power-on reset options.

Feature Summary

• Octal architecture with 8 independent 12-bit DAC channels in a 16-lead MSOP package
• Integrated 10ppm/°C precision reference yielding a 2.5V full-scale output
• I2C-compatible serial interface with selectable slave addresses via CA0, CA1, and CA2 pins
• Power-on reset configurable to zero-scale or mid-scale in internal reference mode

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment
• Automotive applications
• Optical networking devices

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the IMS designation corresponds to the 16-lead MSOP package type and the LZ12 suffix specifies the 12-bit resolution with zero-scale power-on reset behavior. Ensure the component meets the required industrial temperature range specifications for the target application environment.

Selection Notes

Select this part when multiple isolated voltage outputs are required within a compact footprint. The 12-bit resolution provides high accuracy suitable for precision instrumentation. Consider the 2.5V internal reference limit; if higher output spans are needed, the H-grade variant offering 4.096V should be evaluated instead. Verify that the I2C bus speed requirements align with the device's support for both standard and fast modes.

Part Context

This component belongs to the LTC2637 family, which includes variants with different resolutions (8-bit, 10-bit, 12-bit) and package types (DFN, MSOP). The IMS-LZ12 configuration specifically denotes the industrial grade version housed in a 16-lead MSOP package with 12-bit resolution and zero-scale reset functionality. Other family members may offer different full-scale voltages or external reference capabilities.

Replacement Considerations

Direct replacements within the same family include LTC2637IMS-LZ10#TRPBF for 10-bit resolution or LTC2637IMS-LZ8#TRPBF for 8-bit resolution, maintaining identical pinouts and interfaces. For higher voltage spans, the H-grade equivalents such as LTC2637IMS-HZ12#TRPBF provide 4.096V full-scale output but require a minimum supply voltage of 4.5V.