LTC2640ITS8-LM10#TRMPBF

Overview

The LTC2640ITS8-LM10#TRMPBF is a single-channel, 10-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 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Key electrical specifications include a typical settling time of 3.8µs at ±1LSB for a 10-bit resolution, a maximum integral nonlinearity (INL) of ±1LSB, and a supply current of 180µA at 3V. The part includes power-on reset functionality 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 code
• Rail-to-rail output buffer guaranteed monotonic over temperature

Applications

• Mobile communications
• Process control and industrial automation
• Automatic test equipment
• Portable equipment
• Optical networking

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 'I' grade designation corresponds to the industrial temperature range of –40°C to 85°C. Ensure compatibility with the 8-lead TSOT-23 package dimensions for PCB layout requirements.

Selection Notes

Select this component when a 10-bit resolution with mid-scale power-on reset is required. The LM suffix denotes the 2.5V internal reference mode suitable for 2.7V to 5.5V supplies. Consider the H-grade variant if operation up to 125°C or a 4.096V full-scale output is necessary. Verify that the system logic levels are compatible with the CMOS/TTL inputs.

Part Context

This part 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 package and core architecture but varies by accuracy grade, reference voltage, and power-on reset behavior. The ITS8-LM10 variant specifically targets applications requiring moderate precision with low power consumption in compact form factors.

Replacement Considerations

Direct pin-compatible substitutes within the same family include the LTC2640ITS8-HM10#TRMPBF (4.096V FSR, H-grade) and LTC2640ITS8-LZ10#TRMPBF (Zero-scale reset). Cross-family replacements require verification of pinout, supply voltage ranges, and serial interface timing compatibility.