LTC2640ITS8-LM12#TRPBF

Overview

The LTC2640ITS8-LM12#TRPBF 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 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 ±1LSB, and a power 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
• Optical networking devices

Procurement Notes

Verify the specific ordering suffix #TRPBF indicates a 2,500-piece tape and reel packaging configuration. Confirm the 'I' grade designation matches the required industrial operating temperature range of –40°C to 85°C for the application environment. Ensure compatibility with the 2.7V to 5.5V supply voltage constraints.

Selection Notes

Select this part when a 12-bit resolution with ±1LSB maximum INL is required in a compact 8-lead TSOT-23 package. Choose the 'M' suffix variant if a mid-scale power-on reset state is preferred over zero-scale. This component is suitable for designs requiring low power consumption (180µA typical) and bidirectional reference capabilities via the REF pin.

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 in accuracy grades, power-on reset behaviors, and internal reference full-scale voltages (2.5V or 4.096V).

Replacement Considerations

Direct functional substitutes within the same package and specification profile include other variants from the LTC2640 family, such as the LTC2640ITS8-LZ12#TRPBF (zero-scale reset) or LTC2640ITS8-HM12#TRPBF (4.096V full-scale). Verify pinout compatibility and thermal characteristics when substituting.