LTC2640HTS8-HM12#TRPBF

Overview

The LTC2640HTS8-HM12#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 4.096V and operates on a single supply voltage ranging from 4.5V to 5.5V. The device utilizes a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Key electrical characteristics include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a settling time of 4.6µs at ±1LSB, and a typical supply current of 200µA at 5V. It incorporates a power-on reset circuit that defaults the output to mid-scale.

Feature Summary

• Integrated 10ppm/°C precision reference yielding a 4.096V full-scale output
• 12-bit resolution with guaranteed monotonicity over temperature
• Power-on reset to mid-scale for consistent system initialization
• Low power consumption: 200µA typical supply current at 5V

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 format. Confirm the H-grade designation corresponds to the automotive temperature range of –40°C to +125°C. Ensure the HM12 suffix aligns with the required 12-bit resolution and mid-scale power-on reset configuration before procurement.

Selection Notes

Select this component when a 4.096V rail-to-rail output is required within a 4.5V to 5.5V supply domain. The mid-scale reset option (HM) is suitable for applications where downstream circuits remain active during power-up and cannot tolerate zero-scale outputs. For lower supply voltages or different reset behaviors, consider alternative suffixes such as LZ for zero-scale reset or L grades for 2.7V operation.

Part Context

This part belongs to the LTC2640 family of single-channel DACs available in 8-lead TSOT-23 packages. The family offers combinations of 8-, 10-, and 12-bit resolutions with either 2.5V or 4.096V internal references. The HTS8 variant specifically denotes the high-temperature grade (H), ThinSOT package (TS8), and mid-scale reset (M) configuration.

Replacement Considerations

Direct pin-compatible substitutes within the same family include LTC2640HTS8-LM12#TRPBF for 2.5V operation or LTC2640HTS8-HZ12#TRPBF for zero-scale reset. Cross-family replacements require verification of interface compatibility and pinout alignment.