LTC2640ITS8-HZ12#TRPBF

Overview

The LTC2640ITS8-HZ12#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 within a supply voltage range of 4.5V to 5.5V. The device incorporates a rail-to-rail output buffer guaranteed monotonic over temperature. It utilizes a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Key functional attributes include a power-on reset circuit configured to set the output to zero-scale upon initialization and an asynchronous DAC clear pin for immediate output resetting.

Feature Summary

• 12-bit resolution with maximum integral nonlinearity (INL) error of ±2.5 LSB
• Integrated 10ppm/°C precision reference yielding 4.096V full-scale output
• Power-on reset defaults to zero-scale output for consistent system initialization
• Asynchronous CLR pin allows immediate clearing of registers and output to zero

Applications

• Process control and industrial automation systems
• Automatic test equipment requiring precise voltage generation
• Portable battery-powered instrumentation
• Optical networking signal conditioning

Procurement Notes

Verify the specific suffix #TRPBF indicates a 2,500-piece tape and reel packaging configuration as defined in the datasheet ordering information. Confirm that the H-grade designation aligns with the required automotive temperature range of –40°C to 125°C for the intended application environment. Ensure the supply voltage infrastructure supports the minimum 4.5V requirement for the internal reference mode operation.

Selection Notes

Select this component when a 4.096V output span is required, necessitating a supply voltage between 4.5V and 5.5V. Choose the H-grade variant if operation beyond 85°C is necessary, as it supports temperatures up to 125°C. The Z-suffix is critical for designs requiring the DAC output to initialize at zero volts upon power-up, preventing transient errors in downstream circuits during startup sequences.

Part Context

This part belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The family distinguishes itself through integrated low-drift references and compact 8-lead TSOT-23 packaging. Variants are categorized by full-scale voltage (2.5V or 4.096V), power-on reset behavior (zero or mid-scale), and temperature grades (C, I, or H).

Replacement Considerations

Direct replacements within the same package and functionality include other LTC2640 variants such as LTC2640ITS8-LZ12#TRPBF for lower voltage applications or LTC2640ITS8-HM12#TRPBF if mid-scale power-on reset is acceptable instead of zero-scale.