LTC2637IMS-HMX8#PBF

Overview

The LTC2637IMS-HMX8#PBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 10ppm/°C internal reference and operates on a single 4.5V to 5.5V supply, providing a full-scale output of 4.096V. The device 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 ±0.5 LSB, a settling time of 3.9µs, and a typical power consumption of 1mA. It incorporates double-buffered data latches and ultralow crosstalk between DAC channels.

Feature Summary

• Octal 8-Bit Architecture: Contains eight independent DAC channels with rail-to-rail buffered outputs in a 16-lead MSOP package.
• Precision Internal Reference: Integrated 4.096V reference with low drift of 10ppm/°C for stable performance.
• I2C Interface: Supports standard and fast mode clock rates up to 400kHz for efficient serial communication.
• Power-On Reset Configuration: Configured for mid-scale reset upon power-up when using external reference mode.

Applications

• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Battery-Powered Equipment

Procurement Notes

Verify the specific suffix #PBF indicates lead-free packaging and tube distribution. Confirm the H-grade designation matches the required -40°C to +125°C operating temperature range. Ensure the MX suffix aligns with the system's power-on reset requirements for external reference configurations.

Selection Notes

Select this part for applications requiring multiple low-resolution channels with precise timing. The H-grade variant supports higher supply voltages (4.5V–5.5V) compared to the L-grade. Verify that the I2C address pins (CA0, CA1, CA2) are configured correctly to avoid bus conflicts in multi-device systems.

Part Context

This component belongs to the LTC2637 family, which offers 8-, 10-, and 12-bit resolutions. The IMS package denotes the 16-lead MSOP form factor, while the H suffix specifies the automotive-grade temperature range and 4.096V full-scale output capability.

Replacement Considerations

Direct substitutes within the same family include LTC2637IMS-HMI8#PBF (different power-on reset behavior) or LTC2637IMS-LMX8#PBF (lower voltage operation). Cross-family replacements require verifying pin compatibility and interface protocols.