LTC2640AITS8-LM12#TRPBF

Overview

The LTC2640AITS8-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 SPI/MICROWIRE compatible 3-wire serial interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±1 LSB, a typical settling time of 4.1µs at 3V, and a supply current of 180µA at 3V. It is housed in an 8-lead TSOT-23 package.

Feature Summary

• Integrated Precision Reference: Provides a stable 2.5V full-scale output with a temperature coefficient of 10ppm/°C.
• High Accuracy: Guaranteed monotonic operation with a maximum INL error of ±1 LSB for the A-grade device.
• Low Power Consumption: Typical supply current of 180µA at 3V, reducing to 1.8µA maximum in power-down mode.
• Flexible Reset Options: Power-on reset circuitry allows configuration to reset to either zero-scale or mid-scale.

Applications

• Mobile Communications
• Process Control and Industrial Automation
• Automatic Test Equipment
• Portable Equipment
• Automotive Systems

Procurement Notes

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

Selection Notes

Select this part when a single-channel DAC with high accuracy (±1 LSB INL) and low power consumption is required. The LM suffix indicates a mid-scale power-on reset, which may be suitable if downstream circuits can tolerate a non-zero initial output. For applications requiring a zero-scale start-up, consider the LZ suffix variant instead.

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 package and SPI interface but varies in accuracy grades (C, I, H), reset behaviors (M, Z), and full-scale voltages (L for 2.5V, H for 4.096V).

Replacement Considerations

Public confirmed substitute part numbers are not provided in the source material. When evaluating alternatives, ensure compatibility with the 3-wire SPI interface, 12-bit resolution, and 2.5V full-scale output requirement.