LTC2640ACTS8-LZ12#TRPBF

Overview

The LTC2640ACTS8-LZ12#TRPBF is a single-channel, 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices. It features an integrated precision reference with a full-scale output of 2.5V and operates on a single supply voltage ranging from 2.7V to 5.5V. The device incorporates a rail-to-rail output buffer guaranteed monotonic over temperature. Key electrical parameters include a maximum integral nonlinearity (INL) error of ±1 LSB for the A-grade variant, a typical settling time of 4.1µs at 3V, and a supply current of 180µA at 3V. It utilizes a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz.

Feature Summary

• Integrated 10ppm/°C precision reference with 2.5V full-scale output
• Rail-to-rail output buffer guaranteed monotonic over temperature
• Power-on reset circuit clears DAC output to zero-scale
• Asynchronous CLR pin for immediate zero-scale reset

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates a 2,500-piece tape and reel packaging configuration as defined in the datasheet. Confirm that the 'C' temperature grade corresponds to the commercial range of 0°C to 70°C. Ensure the 'A' electrical grade matches the requirement for ±1LSB maximum INL error. Cross-reference the lead-free designation and RoHS compliance status with current manufacturer documentation.

Selection Notes

Select this component when a single-channel 12-bit DAC with low power consumption and high accuracy is required. The C-grade temperature range (0°C to 70°C) suits commercial applications. The LZ12 suffix ensures a zero-scale power-on reset and 2.5V internal reference. Consider the I or H grades if operation below 0°C or above 70°C is necessary. Verify that the 2.7V minimum supply voltage aligns with the system power architecture.

Part Context

This part belongs to the LTC2640 family of single voltage-output DACs available in 8-lead TSOT-23 packages. The family offers combinations of 12-, 10-, and 8-bit resolutions with varying power-on reset options and full-scale voltages. The LTC2640ACTS8-LZ12#TRPBF specifically denotes the A-grade accuracy, commercial temperature range, zero-scale reset, and 2.5V internal reference configuration within this series.

Replacement Considerations

Direct replacements within the same package and functionality include other LTC2640 variants such as LTC2640ACS8-LZ12#TRMPBF (500-unit reel) or different temperature grades like LTC2640IS8-LZ12. Ensure compatibility with the 3-wire serial interface timing and voltage levels when substituting.