LTC2637IMS-LMX12#TRPBF

Overview

The LTC2637IMS-LMX12#TRPBF is an octal 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features a 16-lead MSOP package and communicates via a 2-wire I2C-compatible serial interface. The device operates with an external reference, setting the full-scale output to the REF pin voltage, and includes a power-on reset function that initializes outputs to mid-scale. Key electrical specifications include a maximum integral nonlinearity error of ±2.5 LSB, a supply voltage range of 2.7V to 5.5V, and rail-to-rail output buffers guaranteed monotonic over the industrial temperature range of –40°C to 85°C.

Feature Summary

• Octal architecture providing eight independent 12-bit DAC channels in a single package
• I2C-compatible serial interface supporting standard mode (100kHz) and fast mode (400kHz)
• External reference configuration allowing full-scale output to match the REF pin voltage
• Power-on reset circuit configured to initialize all DAC outputs to mid-scale

Applications

• Process control and industrial automation systems
• Portable equipment requiring multi-channel signal generation
• Automatic test equipment applications
• Mobile communications infrastructure

Procurement Notes

Verify the specific ordering suffix LMX12#TRPBF against official manufacturer documentation to confirm the external reference mode and tape-and-reel packaging quantity. Ensure the design supports the required I2C bus pull-up resistors and external reference voltage stability for specified performance.

Selection Notes

Select this part when multiple low-power voltage outputs are needed with precise I2C control. The LMX suffix indicates operation with an external reference rather than the internal 2.5V or 4.096V options. Confirm that the external reference source meets the 1V to VCC input range requirement and that the system timing accommodates the 400kHz SCL clock limit.

Part Context

This component belongs to the LTC2637 family of octal DACs, which also includes variants with internal references (LMI, LZ suffixes) and different resolution options (8-bit, 10-bit). The IMS designation identifies the 16-lead MSOP package, while the I grade specifies the industrial operating temperature range. Other family members offer alternative power-on reset behaviors and fixed internal reference voltages.

Replacement Considerations

Direct replacements within the same family require matching the channel count, resolution, and package type. Variants like LTC2637IMS-LMI12 share the physical footprint but differ in reference configuration and power-on reset behavior. Verify that any substitute maintains compatibility with the existing I2C addressing scheme and external reference circuitry.