3V fixed reference with ±0.5% initial accuracy
The LT6660KCDC-3#TRMPBF from Analog Devices is a precision series voltage reference delivering a fixed 3V output with ±0.5% initial tolerance. It accepts a wide input range from 5.5V to 30V, making it suitable for systems with unregulated or varying supply rails. Output current is rated at 20 mA, enough to bias multiple ADC inputs or a small sensor array without an external buffer. Noise performance is specified at 4 ppm p-p (0.1 Hz to 10 Hz) and 4 ppm rms (10 Hz to 10 kHz), a clean enough floor for 12- to 14-bit SAR converters. The temperature coefficient of 50 ppm/°C keeps the output within a few millivolts across the 0°C to 70°C commercial range. Housed in a 3-WFDFN with exposed pad (3-DFN, 2x2 mm), the part is a surface-mount fit for compact PCBs where board area is tight. The exposed pad helps thermal management when sourcing the full 20 mA at high input voltage.
Active lifecycle — no end-of-life risk for new designs
This reduces supply-chain risk for both prototyping and volume manufacturing. The part is ROHS3 compliant, meeting the latest EU restriction standards.
Package and mounting — 3-DFN with exposed pad
The LT6660KCDC-3#TRMPBF uses a 3-WFDFN exposed-pad package (supplier device package: 3-DFN, 2x2 mm). The small footprint suits space-constrained designs, but the exposed pad requires a thermal via pattern under the part to dissipate heat when sourcing high output current at elevated input voltage. Mounting is surface-mount only. Cut tape (CT) is also available for smaller quantities.