12-bit current-steering DAC — 20 ns settling buys you real bandwidth
The LTC1666CG#PBF is a 12-bit, current-steering digital-to-analog converter from Linear Technology, in a 28-SSOP package. It delivers a differential current output with a typical settling time of 20 ns — fast enough for direct digital synthesis in communications IF chains, arbitrary waveform generators, and high-speed automatic test equipment. The current-steering architecture and parallel interface make it a direct fit for designs that need a clean, fast analog output from a digital data stream without the latency of serial conversion.
Supply rails and temperature grade — fit check for the BOM
The analog supply is ±5 V — a bipolar rail is mandatory. This is not a single-supply part; the current-steering core requires the negative rail for the output compliance range. The digital supply is not explicitly listed in the spec summary, but the parallel interface is TTL/CMOS-compatible at 5 V logic levels. Operating temperature is 0°C to 70°C — commercial grade, suitable for benchtop instruments, lab equipment, and indoor telecom infrastructure. Not rated for industrial or automotive environments.
Active lifecycle — no LTB risk on this line item
The LTC1666CG#PBF carries an Active lifecycle status. There is no last-time-buy notice, no NRND flag, and no successor part pushed by the manufacturer. It can be specified into new designs with normal supply-chain confidence. The ROHS3 compliance is current — no exemptions expiring.