DAC081C081 - 8-Bit Micro Power Digital-to-Analog Converter with an I2C-Compatible Interface

The DAC081C08x device is an 8-bit, single-channel, voltage-output digital-to-analogconverter (DAC) that operates from a 2.7-V to 5.5-V supply. The output amplifier allowsrail-to-rail output swing and has an 4.5-µsec settling time. The DAC081C081 uses the supply voltageas the reference to provide the widest dynamic output range and typically consumes 132 µA whileoperating at 5 V. It is available in 6-lead SOT and WSON packages and provides three addressoptions (pin selectable).

As an alternative, the DAC081C085 provides nine I²C addressingoptions and uses an external reference. It has the same performance and settling time as theDAC081C081. It is available in an 8-lead VSSOP.

The DAC081C081 and DAC081C085 use a 2-wire, I²C-compatibleserial interface that operates in all three speed modes, including high-speed mode (3.4 MHz). Anexternal address selection pin allows up to three DAC081C081 or nine DAC081C085 devices per 2-wirebus. Pin-compatible alternatives to the DAC081C081 are available that provide additional addressoptions.

The DAC081C081 and DAC081C085 each have a 16-bit register that controls the mode ofoperation, the power-down condition, and the output voltage. A power-on reset circuit ensures thatthe DAC output powers up to zero volts. A power-down feature reduces power consumption to less thana microWatt. Their low power consumption and small packages make these DACs an excellent choice foruse in battery-operated equipment. Each DAC operates over the extended industrial temperature rangeof −40°C to +125°C.

The DAC081C081 and DAC081C085 are each part of a family of pin-compatible DACs that alsoprovide 12- and 10-bit resolution. For 12-bit DACs see theDAC121C081 andDAC121C085. For 10-bit DACssee the DAC101C081 andDAC101C085.

• Ensured Monotonicity to 8-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 8 Bits
• INL ±0.6 LSB (Maximum)
• DNL ±0.1 LSB (Maximum)
• Settling Time 4.5 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

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