TI DAC121C081CISD/NOPB

The DAC121C081 is a 12-bit, single-channel, voltage-output digital-to-analog converter (DAC) that operates from a 2.7 V to 5.5 V supply. The output amplifier allows rail-to-rail output swing and has an 8.5-µs settling time. The DAC121C081 uses the supply voltage as the reference to provide the widest dynamic output range, and typically consumes 132 µA while operating at 5 V. It is available in 6-pin SOT and WSON packages, and provides three address options (pin selectable).

As an alternative, the DAC121C085 provides nine I²C addressing options and uses an external reference. It has the same performance and settling time as the DAC121C081, and is available in an 8-lead VSSOP.

The DAC121C081 and DAC121C085 use a 2-wire, I²C-compatible serial interface that operates in all three speed modes, including high-speed mode (3.4 MHz). An external address selection pin allows up to three DAC121C081 or nine DAC121C085 devices per 2-wire bus. Pin compatible alternatives to the DAC121C081 are available that provide additional address options.

The DAC121C081 and DAC121C085 each have a 16-bit register that controls the mode of operation, the powerdown condition, and the output voltage. A power-on reset circuit ensures that the DAC output powers up to 0V. A power-down feature reduces power consumption to less than a microWatt. Their low power consumption and small packages make these DACs an excellent choice for use in battery-operated equipment. Each DAC operates over the extended industrial temperature range of -40°C to +125°C.

The DAC121C081 and DAC121C085 are each part of a family of pin compatible DACs that also provide 8 and 10 bit resolution. For 8-bit DACs see the DAC081C081 and DAC081C085. For 10-bit DACs see the DAC101C081 and DAC101C085.

• Ensured Monotonicity to 12-Bits
• Low Power Operation: 156-µA Maximum at 3.3 V
• Extended Power Supply Range (2.7 V to 5.5 V)
• I2C-Compatible 2-Wire Interface Which Supports Standard (100-kHz), Fast (400-kHz), and High Speed (3.4-MHz) Modes
• Rail-to-Rail Voltage Output
• Very Small Package
• Resolution: 12 bits
• INL: ±8 LSB (Maximum)
• DNL: 0.6 / –0.5 LSB (Maximum)
• Settling Time: 8.5 µs (Maximum)
• Zero Code Error: 10 mV (Maximum)
• Full-Scale Error: -0.7% FS (Maximum)
• Supply Power Normal: 380 µW (3 V) / 730 µW (5 V) (Typical) Power Down: 0.5 µW (3 V) / 0.9 µW (5 V) (Typical)

• Industrial Process Control
• Portable Instruments
• Digital Gain and Offset Adjustment
• Programmable Voltage and Current Sources
• Test Equipment