LTC2637IDE-LZ12#TRPBF

Overview

The LTC2637IDE-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 10ppm/°C temperature coefficient, 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 (INL) error of ±2.5 LSB, a settling time of 4.5µs at 3V, and low power consumption of 100µA per DAC channel at 3V. The unit incorporates double-buffered data latches and guarantees monotonicity over the industrial temperature range of –40°C to 85°C.

Feature Summary

• Octal architecture with 12-bit resolution and rail-to-rail buffered outputs
• Integrated 2.5V precision reference with 10ppm/°C drift
• I²C interface with selectable internal or external reference modes
• Power-on reset configured to zero-scale in internal reference mode

Applications

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

Procurement Notes

Verify that the #TR suffix confirms the tape and reel packaging format containing 2500 pieces. Confirm the IDE suffix corresponds to the Industrial temperature grade (-40°C to 85°C) and the MS package type. Ensure the LZ12 designation matches the required zero-scale power-on reset behavior and 2.5V full-scale output specification for the design.

Selection Notes

Select this part when eight independent 12-bit channels are required within a compact footprint. The internal 2.5V reference simplifies board layout by eliminating external components. Verify that the 2.7V to 5.5V supply range aligns with the system power rails. Consider the 4.5µs settling time for bandwidth requirements and ensure the I²C bus speed supports the application's update rate.

Part Context

This component belongs to the LTC2637 family, which includes 8-bit, 10-bit, and 12-bit variants. The specific ordering suffixes determine the package style (DFN or MSOP), temperature grade, full-scale voltage, and power-on reset state. The 'IDE' indicates the Industrial grade in a 16-lead MSOP package, while 'LZ12' specifies the 2.5V reference, zero-scale reset, and 12-bit resolution.

Replacement Considerations

Direct substitutes within the same family include LTC2637IMS-LZ12#TRPBF (same specs, different manufacturer source if applicable) or other LTC2637 variants with adjusted resolution or reset states. Cross-family replacements require verifying pin compatibility and I²C address configurations.