LTC2640CTS8-LM12#TRMPBF

Overview

The LTC2640CTS8-LM12#TRMPBF is a single-channel, 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference providing a full-scale output of 2.5V and operates on a single supply voltage ranging from 2.7V to 5.5V. The device utilizes a SPI/MICROWIRE compatible 3-wire serial interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a typical settling time of 4.1µs at ±1LSB, and a supply current of 180µA at 3V. It incorporates a power-on reset circuit that sets the output to mid-scale upon initialization.

Feature Summary

• Integrated 10ppm/°C precision reference with 2.5V full-scale output
• SPI/MICROWIRE compatible 3-wire serial interface supporting up to 50MHz clock
• Power-on reset to mid-scale for consistent system initialization
• Rail-to-rail output buffer guaranteed monotonic over temperature

Applications

• Mobile communications systems
• Process control and industrial automation
• Automatic test equipment
• Portable battery-powered equipment

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-piece tape and reel packaging configuration as defined in the manufacturer's documentation. Confirm the 'C' grade corresponds to the commercial operating temperature range of 0°C to 70°C. Ensure compatibility with the required supply voltage range of 2.7V to 5.5V for the specified 2.5V full-scale output configuration.

Selection Notes

Select this component when a 12-bit resolution with a 2.5V internal reference is required in an 8-lead TSOT-23 package. The LM suffix designates a mid-scale power-on reset state, which differs from the LZ suffix that resets to zero-scale. This part is suitable for applications requiring low power consumption (180µA typical) and rail-to-rail output swing within the specified supply voltage limits.

Part Context

This part belongs to the LTC2640 family of single DACs available in 12-, 10-, and 8-bit resolutions. The CTS8 designation identifies the commercial temperature grade and the 8-lead plastic TSOT-23 (ThinSOT) surface-mount package. The LM12 suffix specifies the mid-scale reset option and 12-bit resolution with the 2.5V internal reference variant.

Replacement Considerations

Direct replacements within the same family include LTC2640CTS8-LZ12#TRMPBF for zero-scale reset or LTC2640ITS8-LM12#TRMPBF for extended industrial temperature range (-40°C to 85°C). Verify pinout compatibility and thermal characteristics when substituting between C, I, and H grades.