Product details


Resolution (Bits) 12 Number of DAC channels (#) 1 Interface type I2C Output type Buffered Voltage Settling time (µs) 8.5 Features Cost Optimized, Low Power Reference type Ext Architecture String Rating Catalog Output range (Max) (mA/V) 5.5 Output range (Min) (mA/V) 0 Operating temperature range (C) -40 to 125 open-in-new Find other Precision DACs (<=10MSPS)

Package | Pins | Size

VSSOP (DGK) 8 15 mm² 3 x 4.9 open-in-new Find other Precision DACs (<=10MSPS)


  • 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)
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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 power-down condition, and the output voltage. A power-on reset circuit ensures that the DAC output powers up to 0 V. 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.

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Technical documentation

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Type Title Date
* Data sheet DAC121C081 and DAC121C085 12-Bit Micro Power Digital-to-Analog Converter With an I2C-Compatible Interface datasheet (Rev. F) Oct. 03, 2016
User guide DAC121C085EVM Booster Pack User’s Guide Nov. 05, 2014
Application note AN-2001 Daisy Chaining Precision DACs (Rev. A) May 01, 2013
User guide 8/10/12-Bit Micro Power D/A Converter with I2C Interface Eval Bd User Guide Jan. 25, 2012

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The DAC121C085EVM is a demonstration kit for the DAC121C085, a 12-bit, 1-channel, 8.5us settling time, 2-wire interface digital-to-analog converter. The EVM allows users to evaluate the operation and performance of the DAC121C085 data converter. The EVM features a small size layout that directly (...)

  1. LaunchPad booster pack
  2. Power by USB

Design tools & simulation

PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SPICE-based analog simulation program
TINA-TI TINA-TI provides all the conventional DC, transient and frequency domain analysis of SPICE and much more. TINA has extensive post-processing capability that allows you to format results the way you want them. Virtual instruments allow you to select input waveforms and probe circuit nodes voltages (...)
document-generic User guide
Analog engineer's calculator
ANALOG-ENGINEER-CALC — The Analog Engineer’s Calculator is designed to speed up many of the repetitive calculations that analog circuit design engineers use on a regular basis. This PC-based tool provides a graphical interface with a list of various common calculations ranging from setting op-amp gain with feedback (...)
  • Expedites circuit design with analog-to-digital converters (ADCs) and digital-to-analog converters (DACs)
    • Noise calculations
    • Common unit translation
  • Solves common amplifier circuit design problems
    • Gain selections using standard resistors
    • Filter configurations
    • Total noise for common amplifier configurations
  • (...)

CAD/CAE symbols

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VSSOP (DGK) 8 View options

Ordering & quality

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