The LTC1257 is a complete single supply, 12-bit voltage output digital-to-analog converter (DAC) in an SO-8 package. It includes an output buffer amplifier, 2.048V voltage reference, and an easy to use three-wire cascadable serial interface. It is suitable for industrial process control and automatic test equipment. The LTC1257 features small size, low power consumption, and other characteristics.
The LTC1257 is a complete single‑supply, 12‑bit voltage‑output DAC offered in an 8‑pin SO‑8 package. It includes a built‑in 2.048 V reference, an output buffer amplifier, and a three‑wire cascaded serial interface, making it suitable for battery‑powered and space‑constrained applications.
The datasheet provides absolute maximum ratings, detailed electrical characteristics, typical performance curves, pin definitions, and application notes such as daisy‑chaining multiple devices and driving the part with optoisolators.
| Resolution | 12 bits |
|---|---|
| Supply Voltage Range | 4.75 V to 15.75 V |
| Output Voltage Swing | within 2.7 V of VEE |
| Output Current Capability | 2 mA |
| Differential Nonlinearity (DNL) | +0.5 LSB |
| Integral Nonlinearity (INL) | +3.5 LSB |
| Reference Output Voltage | 2.048 V |
| Maximum Clock Frequency | 14 MHz |
The device operates from a positive supply voltage of 4.75 V to 15.75 V.
The LTC1257 comes in an 8‑lead SO‑8 package.
The maximum clocking rate is 1.4 MHz, with a specified maximum clock frequency of 14 MHz.
The internal reference voltage is 2.048 V.