LTC2637HMS-LMX10#PBF

Overview

The LTC2637HMS-LMX10#PBF is an octal, 10-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a high-accuracy internal reference with a 4.096V full-scale output and operates on a single 4.5V to 5.5V supply. The device communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical characteristics include a maximum integral nonlinearity (INL) of ±1 LSB, a settling time of 4.3µs at 3V (typical), and ultralow DAC-to-DAC crosstalk below 3nV•s. It incorporates double-buffered data latches and a power-on reset circuit configured to initialize outputs to mid-scale when using an external reference.

Feature Summary

• Octal architecture with 10-bit resolution and rail-to-rail buffered outputs
• Integrated 4.096V precision reference with 10ppm/°C drift coefficient
• Ultralow crosstalk between channels (<3nV•s)
• Power-on reset to mid-scale in external reference mode

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Automotive systems
• Optical networking

Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging and RoHS compliance. Confirm the MSOP package type matches the target PCB footprint. Ensure the H-grade temperature rating (-40°C to 125°C) aligns with environmental requirements. Check for availability of development tools like the DC1534A demonstration board if hardware validation is needed.

Selection Notes

Select this part for applications requiring multiple synchronized analog outputs with minimal channel interference. The LMX10 variant is appropriate when an external reference voltage is used and mid-scale initialization upon power-up is required. Compare against the LTC2637-L series if a lower supply voltage (2.7V) or 2.5V full-scale output is preferred. Consider the H-grade specification for operation up to 125°C.

Part Context

This component belongs to the LTC2637 family of octal DACs available in 8-, 10-, and 12-bit resolutions. The 'H' designation specifies the automotive temperature grade (-40°C to 125°C) and 4.096V internal reference capability. The 'MS' indicates the 16-lead MSOP package, while 'LMX' defines the external reference mode with mid-scale power-on reset behavior.

Replacement Considerations

Direct substitutes within the same family include LTC2637HMS-LMI10#PBF (internal reference mode) and LTC2637HMS-LZ10#PBF (zero-scale reset). For different resolutions, consider LTC2637HMS-LMX12#PBF or LTC2637HMS-LMX8#PBF. Cross-family replacements require verification of pin compatibility and interface protocols.