LTC2637HMS-LZ8#TRPBF

Overview

The LTC2637HMS-LZ8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device includes rail-to-rail output buffers, double-buffered data latches, and a power-on reset circuit that initializes outputs to zero-scale. Communication is handled via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. It is housed in a 16-lead MSOP package.

Feature Summary

• Octal 8-Bit Resolution: Provides eight independent DAC channels with guaranteed monotonicity over the operating temperature range.
• Integrated Precision Reference: Features a 4.096V internal reference with a low drift of 10ppm/°C for high accuracy.
• I2C Interface: Communicates using a standard 2-wire serial interface compatible with both 100kHz and 400kHz clock rates.
• Power-On Reset: Includes a circuit to reset all DAC outputs to zero-scale upon power-up.

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems

Procurement Notes

Verify the specific suffix #TRPBF indicates tape and reel packaging containing 2500 pieces. Confirm the H-grade designation ensures operation within the –40°C to 125°C automotive temperature range. Ensure the LZ8 code corresponds to the 8-bit resolution and zero-scale power-on reset configuration as defined in the manufacturer's ordering guide.

Selection Notes

Select this part when eight independent voltage outputs are required in a compact surface-mount package. The H-grade variant is necessary for applications requiring operation up to 125°C. The 4.096V full-scale output requires a minimum supply voltage of 4.5V. Verify that the I2C bus speed requirements align with the device's support for standard and fast modes.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also offers 10-bit and 12-bit resolutions. Variants within the family differ by full-scale voltage (2.5V or 4.096V), power-on reset behavior, and temperature grades. The MSOP package provides a compact footprint suitable for space-constrained designs compared to larger leaded packages.

Replacement Considerations

Direct substitutes include other LTC2637 variants with matching pinouts and electrical characteristics, such as LTC2637HMS-HMX8#TRPBF or LTC2637HMS-LMI8#TRPBF, provided the specific resolution, reset behavior, and temperature grade requirements are met.