LTC2637CMS-HMX12#TRPBF

Overview

The LTC2637CMS-HMX12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 4.096V full-scale output with an integrated precision reference exhibiting a 10ppm/°C drift coefficient. The device operates on a single 4.5V to 5.5V supply and communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) of ±2.5 LSB, a settling time of 5µs at ±1LSB, and ultralow DAC-to-DAC crosstalk below 3nV•s. The unit incorporates double-buffered data latches and a power-on reset function configured to initialize outputs to mid-scale in external reference mode.

Feature Summary

• Octal architecture providing eight independent 12-bit voltage outputs in a compact package
• Integrated high-accuracy reference yielding a 4.096V full-scale output with 10ppm/°C temperature stability
• Ultralow inter-channel crosstalk performance specified at less than 3nV•s
• Power-on reset circuitry defaults outputs to mid-scale when utilizing external reference configurations

Applications

• Mobile communications systems requiring multi-channel signal generation
• Process control and industrial automation instrumentation
• Automatic test equipment demanding precise analog output control
• Portable battery-operated devices necessitating low power consumption
• Automotive electronic subsystems operating within extended temperature ranges
• Optical networking infrastructure components

Procurement Notes

Verify the specific ordering suffix HMX12#TRPBF against official manufacturer documentation to confirm the tape and reel packaging quantity and exact power-on reset behavior. Ensure the design supports the required 4.5V to 5.5V supply range for the H-grade variant. Confirm that the MSOP-16 or DFN-14 footprint matches the selected package option during procurement planning.

Selection Notes

Select this component when an octal configuration is required alongside 12-bit resolution and high DC accuracy. The H-grade designation indicates suitability for automotive applications spanning –40°C to 125°C. Designers must ensure the supply voltage remains within the 4.5V to 5.5V window for proper operation of the internal reference. Consider the 5µs settling time for bandwidth requirements and verify I2C bus compatibility with the host microcontroller.

Part Context

This part belongs to the LTC2637 family, which offers 8-bit, 10-bit, and 12-bit resolutions in both L-grade (2.5V FS) and H-grade (4.096V FS) variants. The CMS suffix denotes the commercial temperature grade (0°C to 70°C), while the HMX12 specifies the 12-bit resolution and mid-scale reset behavior for external reference modes. The #TRPBF suffix indicates a lead-free tape and reel product format.

Replacement Considerations

Direct functional substitutes within the same family include the LTC2637CMS-HMI12#TRPBF, which shares identical electrical characteristics but utilizes a zero-scale power-on reset instead of mid-scale. Other resolution options such as the LTC2637CMS-HMX10#TRPBF or LTC2637CMS-HMX8#TRPBF are pin-compatible but offer lower bit depths.