LTC2633CTS8-HI12#TRMPBF

Overview

The LTC2633CTS8-HI12#TRMPBF is a dual 12-bit voltage-output digital-to-analog converter (DAC) from Analog Devices, housed in an 8-lead TSOT-23 package. It features an integrated precision reference with a full-scale output of 4.096V and operates on a single 4.5V to 5.5V supply. The device communicates via a 2-wire I²C-compatible serial interface supporting standard (100kHz) and fast (400kHz) modes. Key electrical specifications include a maximum integral nonlinearity (INL) error of ±1.5 LSB, a settling time of 4.7µs at 5V, and a supply current of 0.5mA at 5V. It includes a power-on reset circuit configured to initialize outputs to mid-scale.

Feature Summary

• Dual 12-bit DACs with rail-to-rail output buffers and guaranteed monotonicity over the operating temperature range.
• Integrated high-accuracy reference providing a 4.096V full-scale output with a temperature coefficient of 10ppm/°C.
• I²C-compatible serial interface with selectable internal or external reference inputs.
• Power-on reset options including zero-scale, mid-scale, or high-impedance states for controlled startup.

Applications

• Mobile communications systems requiring precise signal generation.
• Process control and industrial automation instrumentation.
• Portable equipment with limited power budgets.
• Automotive electronic control units.

Procurement Notes

Verify the #TRMPBF suffix indicates a 500-unit tape and reel packaging configuration, distinct from the standard 2500-unit #TRPBF reel. Confirm the C-grade designation aligns with commercial temperature requirements (0°C to 70°C) rather than the H-grade automotive specification (-40°C to 125°C). Ensure the HI12 code corresponds to the specific mid-scale power-on reset behavior for the internal reference mode.

Selection Notes

Select this component when a dual-channel 12-bit DAC is required in a compact TSOT-23 footprint. The H-grade internal reference necessitates a minimum supply voltage of 4.5V; verify system power rails meet this threshold. For applications requiring lower supply voltages (2.7V–5.5V), consider the L-grade variant with a 2.5V full-scale output. The C-grade temperature range limits suitability for harsh environmental conditions compared to the H-grade option.

Part Context

This part belongs to the LTC2633 family of dual DACs, which also includes 10-bit and 8-bit resolutions. The 'A' suffix denotes an enhanced accuracy grade with ±1.5 LSB maximum INL, superior to the standard ±2.5 LSB found in non-A variants. The 'H' indicates the 4.096V full-scale range, while 'I' specifies the mid-scale power-on reset configuration.

Replacement Considerations

Direct pin-compatible replacements within the same package include other LTC2633 variants such as LTC2633CTS8-LI12#TRMPBF for 2.5V operation or LTC2633HTS8-HI12#TRMPBF for extended temperature ranges. Cross-family alternatives like the LTC2635 offer quad channels but require different packaging.