LTC2637IMS-LZ8#TRPBF

Overview

The LTC2637IMS-LZ8#TRPBF is an octal 8-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a rail-to-rail output buffer and an integrated precision reference with a full-scale output of 2.5V. The device operates on a single 2.7V to 5.5V supply and communicates via a 2-wire I2C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key specifications include a maximum integral nonlinearity (INL) error of ±0.5 LSB, guaranteed monotonicity over the operating temperature range, and low power consumption of 100µA per DAC at 3V. The part is housed in a 16-lead MSOP package.

Feature Summary

• Octal 8-Bit Resolution: Provides eight independent 8-bit DAC channels within a single component.
• Integrated Precision Reference: Includes a 2.5V full-scale internal reference with a low drift of 10ppm/°C.
• I2C Interface: Supports standard mode (100kHz) and fast mode (400kHz) communication protocols.
• Power-On Reset: Configurable reset behavior; the 'Z' suffix ensures reset to zero-scale in internal reference mode.

Applications

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

Procurement Notes

Verify the specific ordering suffix 'LZ8' corresponds to the 8-bit resolution and zero-scale power-on reset configuration. Confirm the 'MS' designation indicates the 16-lead MSOP package type. Ensure the '#TRPBF' suffix matches the required tape and reel packaging format for automated assembly processes.

Selection Notes

Select this component when multiple low-resolution voltage outputs are required in a compact form factor. The 2.7V to 5.5V supply range accommodates various system voltages. Consider the external reference option if a different full-scale voltage than 2.5V is needed. Verify that the I2C address pins (CA0, CA1, CA2) can be configured to avoid bus conflicts in multi-device systems.

Part Context

This part belongs to the LTC2637 family, which offers 8-, 10-, and 12-bit resolutions in both DFN and MSOP packages. The 'IMS' prefix denotes the industrial temperature grade (-40°C to 85°C). The 'L' suffix specifies the 2.5V full-scale internal reference variant, distinct from the 'H' variant which provides 4.096V.

Replacement Considerations

Direct substitutes within the same family include LTC2637IMS-LZ10#TRPBF (10-bit) and LTC2637IMS-LZ12#TRPBF (12-bit), provided higher resolution is acceptable. For different package types, the DE package variants (e.g., LTC2637IDE-LZ8#TRPBF) offer pin-compatible alternatives in a 14-lead DFN footprint.