LTC2640ITS8-HZ12#TRMPBF

Overview

The LTC2640ITS8-HZ12#TRMPBF 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 and utilizes a 3-wire SPI/MICROWIRE compatible serial interface with clock rates up to 50MHz. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±2.5 LSB, a typical settling time of 4.6µs at ±1LSB, and a power-down current of 4µA maximum. The part includes a power-on reset circuit that defaults the output to zero-scale and is housed in an 8-lead TSOT-23 package.

Feature Summary

• Integrated 10ppm/°C precision reference yielding a 4.096V full-scale output
• Power-on reset to zero-scale via asynchronous CLR pin (Pin 8)
• Rail-to-rail output buffer with guaranteed monotonicity over temperature
• Low power consumption: 200µA typical supply current at 5V; 4µA max in power-down mode

Applications

• Process control and industrial automation systems
• Portable battery-powered equipment
• Automatic test equipment
• Optical networking devices

Procurement Notes

Verify the specific suffix #TRMPBF indicates a 500-unit tape and reel packaging configuration as defined in the manufacturer's ordering guide. Confirm the H-grade designation corresponds to the automotive temperature range of –40°C to 125°C. Ensure the Z suffix requirement for zero-scale power-on reset aligns with system initialization needs. Cross-reference the ITS8 package code with the 8-lead TSOT-23 physical dimensions for PCB layout compatibility.

Selection Notes

Select this component when a 4.096V internal reference is required without external components. The H-grade is necessary for applications operating between –40°C and 125°C. The Z suffix is mandatory if the system requires the DAC output to initialize to zero upon power-up. For lower voltage requirements (2.7V–5.5V), the L-grade variant should be considered instead. Verify that the 50MHz serial clock speed meets the host microcontroller's interface capabilities.

Part Context

This part belongs to the LTC2640 family of single-channel DACs available in 8-, 10-, and 12-bit resolutions. The family differentiates variants by resolution (12), power-on reset behavior (Z for Zero, M for Mid-Scale), full-scale voltage (H for 4.096V, L for 2.5V), and temperature grade (H for Automotive, I for Industrial, C for Commercial). The ITS8 identifier specifies the 8-lead ThinSOT (TSOT-23) plastic package type used across the series.

Replacement Considerations

Direct functional substitutes within the same family include the LTC2640ITS8-LZ12#TRMPBF for 2.5V full-scale operation or the LTC2640ITS8-HM12#TRMPBF for mid-scale power-on reset. External reference versions such as the LTC2640ITS8-HZ12#TRM are available for 2,500-unit reels.