LTC2640CTS8-HZ10#TRMPBF

Overview

The LTC2640CTS8-HZ10#TRMPBF is a single-channel, 10-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 settling time of 4.2µs at 5V, and a typical supply current of 180µA at 3V. It incorporates a power-on reset circuit that defaults the output to zero-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 zero-scale for consistent system initialization
• Rail-to-rail output buffer guaranteed monotonic over temperature

Applications

• Mobile communications systems
• Process control and industrial automation
• Portable battery-powered equipment

Procurement Notes

Verify the specific ordering suffix #TRMPBF indicates a 500-unit tape and reel packaging configuration. Confirm the C-grade temperature range (0°C to 70°C) aligns with the target application environment requirements before procurement.

Selection Notes

Select this part when a 10-bit resolution with a 2.5V internal reference is required in an 8-lead TSOT-23 package. Ensure the operating supply voltage remains within the 2.7V to 5.5V range. Consider the H-grade variant if operation below 0°C or above 70°C is necessary.

Part Context

This component belongs to the LTC2640 family of single-channel DACs. Variants differ by resolution (8, 10, or 12 bits), power-on reset behavior (Zero or Mid-Scale), and full-scale voltage options (2.5V or 4.096V). The 'H' designation in the base model refers to the full-scale voltage setting, while 'Z' specifies the zero-scale reset function.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Verify pin compatibility and electrical specifications against alternative single-channel SPI DACs if sourcing constraints exist.

FAQ

What is the default output state after power-up?

The LTC2640CTS8-HZ10#TRMPBF resets the DAC output to zero-scale upon power-up due to the 'Z' suffix indicating the Zero-Scale reset option.

Can the internal reference be bypassed?

Yes, the REF pin can be used as an input for an external reference voltage to set the full-scale output, overriding the internal 2.5V reference.

What is the maximum serial clock frequency?

The SPI/MICROWIRE compatible serial interface supports clock rates up to 50MHz.