1 Features

• 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)

2 Applications

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

3 Description

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.

1. For all available packages, see the orderable addendum at the end of the data sheet.

Block Diagram