LTC2640ACTS8-LZ12#TRMPBF

Overview

The LTC2640ACTS8-LZ12#TRMPBF 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 2.7V to 5.5V supply. The device incorporates a rail-to-rail output buffer guaranteed monotonic over temperature, with a maximum integral nonlinearity (INL) error of ±1 LSB. It utilizes a 3-wire SPI/MICROWIRE compatible serial interface supporting clock rates up to 50MHz. Power-on reset clears the DAC output to zero-scale. The component is housed in an 8-lead TSOT-23 package.

Feature Summary

• Integrated 10ppm/°C precision reference providing 2.5V full-scale output
• Maximum INL error of ±1 LSB for high accuracy applications
• Rail-to-rail output buffer guaranteed monotonic over temperature
• Power-on reset circuit clears DAC output to zero-scale

Applications

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

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-piece tape and reel packaging quantity as defined in the manufacturer's documentation. Confirm that the 'A' electrical grade designation corresponds to the ±1LSB maximum INL specification required for the design. Ensure the C temperature grade meets the operational environment requirements of 0°C to 70°C.

Selection Notes

Select this part when a compact 8-lead TSOT-23 footprint is required alongside high linearity performance. The internal 2.5V reference simplifies board layout by eliminating external reference components. Choose the LZ variant if system initialization requires the DAC output to default to zero volts upon power-up rather than mid-scale.

Part Context

This component belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The LTS8 package denotes the 8-lead plastic TSOT-23 form factor. The 'C' suffix identifies the commercial temperature range, while 'L' specifies the 2.5V full-scale voltage configuration derived from the internal reference.

Replacement Considerations

Direct pin-compatible replacements within the same series include other resolution variants such as LTC2640ACS8-LZ10 or LTC2640ACS8-LZ8, provided the lower bit depth is acceptable. For higher accuracy requirements, verify if the H-grade automotive version fits the thermal constraints.