The LTC ®1448 is a dual rail-to-rail voltage output, 12-bit digital-to-analog converter (DAC). It includes rail-to-rail output buffer amplifiers and an easy-to-use 3-wire serial interface. It is available in 8-pin SO and PDIP packages and provides the smallest footprint of any dual 12-bit DAC. The LTC1448 has an external reference input pin (REF) and its outputs swing from 0V to REF. The REF input can be tied to VCC providing rail-to-rail operation from supplies of 2.7V to 5.5V. (For devices with internal reference see the LTC1446 data sheet.) The LTC1448 dissipates 2.5mW from a 5V supply. The low power supply current and the small SO-8 package make the LTC1448 i an excellent choice for high performance low power applications.
The LTC1448 is a dual 12‑bit rail‑to‑rail voltage‑output DAC with a 3‑wire serial interface, low power consumption and buffered outputs that can source or sink 5 mA. It operates from 2.7 V to 5.5 V supplies and is suited for battery‑powered and industrial applications.
The handbook details the device’s features, absolute maximum ratings, electrical characteristics, pin descriptions, timing diagrams, typical performance data, and example circuits, helping designers integrate the DAC into their systems.
| Resolution | 12 bits |
|---|---|
| Supply Voltage Range | 2.7 V to 5.5 V |
| Supply Current | 450 pA to 700 pA |
| Maximum DNL Error | 0.5 LSB |
| Full‑Scale Output Voltage | 4.096 V |
| Output Current Capability | 5 mA |
| Output Impedance | 30 Ω |
The device operates from 2.7 V to 5.5 V supply voltage.
Typical supply current is between 450 pA and 700 pA.
The maximum DNL error is 0.5 LSB.
It uses a 3‑wire serial interface with a Schmitt‑triggered clock input.