LTC2640ITS8-LM12#TRMPBF

Overview

The LTC2640ITS8-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 ranging from 2.7V to 5.5V. The device utilizes a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Key electrical specifications include a typical settling time of 4.1µs, a maximum integral nonlinearity (INL) error of ±2.5 LSB, and a power consumption of 180µA at 3V. It incorporates a power-on reset circuit that initializes the output to mid-scale.

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
• Optical networking devices

Procurement Notes

Verify the specific suffix #TRMPBF indicates a 500-piece tape and reel packaging configuration as defined in the manufacturer's ordering guide. Confirm the 'I' grade designation matches the required industrial operating temperature range of –40°C to 85°C for the target application environment.

Selection Notes

Select this part when a 12-bit resolution with a 2.5V internal reference is required in an 8-lead TSOT-23 package. Choose the 'M' suffix variant if mid-scale power-on reset is preferred over zero-scale. Ensure the supply voltage remains within the 2.7V to 5.5V range specified for the 'L' grade full-scale voltage.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 12-, 10-, and 8-bit resolutions. The family shares a common 8-lead TSOT-23 footprint and SPI interface but varies by accuracy grade, reference voltage, and power-on reset behavior. The 'ITS8' designation identifies the Industrial temperature grade and ThinSOT package type.

Replacement Considerations

Direct functional substitutes within the same family include the LTC2640ITS8-LZ12#TRMPBF, which offers identical electrical performance but resets to zero-scale upon power-up instead of mid-scale.