The DAC121C081/ DAC121C085 is a 12-bit micro power digital-to-analog converter (DAC) with an I2C-compatible interface. It provides a wide dynamic output range and fast settling time. The DAC121C081 uses the supply voltage as the reference and has low power consumption. The DAC121C085 provides more address options and uses an external reference voltage. Both have a 2-wire I2C-compatible serial interface and power management features.
The DAC121C081 and DAC121C085 are 12‑bit, single‑channel, voltage‑output digital‑to‑analog converters that operate from a +2.7 V to +5.5 V supply. They use an I²C‑compatible 2‑wire interface with three speed modes (standard 100 kHz, fast 400 kHz, high‑speed 3.4 MHz) and provide rail‑to‑rail output swing. The DAC121C081 offers three pin‑selectable address options, while the DAC121C085 offers nine address options and uses an external reference.
Key specifications include a 12‑bit resolution, 8.5 µs settling time, ultra‑low power consumption (as low as 0.5 pW in power‑down), and operation over an industrial temperature range of –40 °C to +125 °C. The devices are available in 6‑lead TSOT, 6‑lead LLP, and 8‑lead MSOP packages and are suited for industrial process control, portable instruments, and test equipment.
| Resolution | 12 bits |
|---|---|
| Supply Voltage Range | +2.7 V to +5.5 V |
| Operating Temperature Range | -40 °C to +125 °C |
| Settling Time | 8.5 µs (max) |
| Normal Power Consumption (3 V) | 380 pW (typ) |
| Power‑Down Consumption (3 V) | 0.5 pW (typ) |
| Address Options | 3 for DAC121C081, 9 for DAC121C085 |
| Low Power Operation | 156 pA max @ 3.3 V |
The DAC121C081 provides three pin‑selectable address options.
Typical normal‑operation power consumption is 380 pW at 3 V.
They operate from –40 °C to +125 °C.