LTC2637IDE-HMX10#PBF

Overview

The LTC2637IDE-HMX10#PBF is an octal 10-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 4.096V. 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) error of ±1 LSB, a settling time of 4.3µs, and ultralow DAC-to-DAC crosstalk below 3nV•s. The part incorporates double-buffered data latches and a power-on reset circuit configured to initialize outputs to mid-scale when using the internal reference.

Feature Summary

• Octal 10-bit resolution with rail-to-rail buffered voltage outputs
• Integrated 4.096V full-scale reference with ±10ppm/°C drift
• I2C interface with selectable slave addresses via CA0-CA2 pins
• Power-on reset to mid-scale in external 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 the specific ordering suffix HMX against the manufacturer's current documentation to confirm the power-on reset behavior. Ensure the application environment remains within the specified industrial temperature range of –40°C to 85°C. Confirm that the system power supply voltage stays between 4.5V and 5.5V to maintain guaranteed performance specifications.

Selection Notes

Select this component for designs requiring multiple low-drift voltage outputs controlled by a microcontroller. The HMX suffix indicates initialization to mid-scale during external reference operation, which differs from other variants. Consider the 14-lead DFN package dimensions for PCB layout constraints and ensure adequate thermal management for the exposed pad ground connection.

Part Context

This part belongs to the LTC2637 family, which includes 8-bit, 10-bit, and 12-bit variants. The 'I' designation specifies the industrial temperature grade, while 'H' denotes the 4.096V internal reference configuration. The 'MX' suffix defines the power-on reset state relative to external reference usage, distinguishing it from zero-scale or internal-reference reset options.

Replacement Considerations

Direct parameter-equivalent substitutes within the same family include the LTC2637IDE-HMI10#PBF and LTC2637IDE-HZ10#PBF. These alternatives share identical electrical characteristics but differ in their power-on reset configurations. Verify that the chosen replacement matches the required initial output state for the specific application context.