LTC2637CDE-HMX10#PBF

Overview

The LTC2637CDE-HMX10#PBF is an octal 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices Inc. It features a 14-lead DFN package and operates on a single 2.7V to 5.5V supply. The device includes an integrated precision reference with a full-scale output of 2.5V and a temperature coefficient of 10ppm/°C. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Power-on reset defaults to mid-scale in external reference mode.

Feature Summary

• Octal architecture with 10-bit resolution per channel
• Integrated 2.5V precision reference (10ppm/°C)
• Rail-to-rail buffered outputs guaranteed monotonic over -40°C to 125°C
• Ultralow DAC-to-DAC crosstalk (<3nV•s)

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment

Procurement Notes

Verify the specific ordering suffix HMX, which configures the power-on reset behavior to mid-scale for external reference applications. Confirm the C-grade designation aligns with commercial temperature requirements (0°C to 70°C). Ensure the DFN package footprint matches the PCB layout constraints.

Selection Notes

Select this part when eight independent voltage outputs are required within a compact 14-lead DFN form factor. The HMX suffix is critical if the system relies on an external reference and requires a defined mid-scale startup state. For internal reference operation, consider the MI or Z suffixes instead.

Part Context

This component belongs to the LTC2637 family, which offers 8-, 10-, and 12-bit resolutions. The 'C' indicates the commercial temperature grade, while 'DE' specifies the 14-lead DFN package. The '#PBF' denotes lead-free construction compliant with RoHS standards.

Replacement Considerations

LTC2637CDE-MI10#PBF: Identical specifications except power-on reset defaults to mid-scale in internal reference mode.

FAQ

What is the maximum integral nonlinearity error for this device?

The maximum INL error is ±1 LSB.

How does the HMX suffix affect the device initialization?

The HMX suffix ensures that upon power-up, the DAC outputs reset to mid-scale when operating in external reference mode.

What is the typical settling time for this DAC?

The typical settling time to ±1 LSB is 4.3 µs at VCC = 3V.