Features • Guaranteed Monotonicity to 12-bits • Low Power Operation: 156 µA max @ 3.3V • Extended power supply range (+2.7V to +5.5V) • I 2C-Compatible 2-wire Interface which supports standard (100kHz), fast (400kHz), and high speed (3.4MHz) modes • Rail-to-Rail Voltage Output • Very Small Package Description The DAC121C081 is a 12-bit, single channel, voltage-output digital-to-analog converter (DAC) that operates from a +2.7V to 5.5V supply. The output amplifier allows rail-to-rail output swing and has an 8.5µsec settling time. The DAC121C081 uses the supply voltage as the reference to provide the widest dynamic output range and typically consumes 132µA while operating at 5.0V. It is available in 6-lead TSOT and LLP packages and provides three address options (pin selectable). As an alternative, the DAC121C085 provides nine I 2C addressing options and uses an external reference. It has the same performance and settling time as the DAC121C081. It is available in an 8-lead MSOP. The DAC121C081 and DAC121C085 use a 2-wire, I 2C-compatible serial interface that operates in all three speed modes, including high speed mode (3.4MHz). 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 zero volts. 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. Key Specification Resolution 12 bits INL ±8 LSB (max) DNL +0.6 / -0.5 LSB (max) Settling Time 8.5 µs (max) Zero Code Error +10 mV (max) Full-Scale Error −0.7 %FS (max) Supply Power Normal 380 µW (3V) / 730 µW (5V) typ Power Down 0.5 µW (3V) / 0.9 µW (5V) typ Applications • Industrial Process Control • Portable Instruments • Digital Gain and Offset Adjustment • Programmable Voltage & Current Sources • Test Equipment

Typical bus configuration MY BRIEFCASE                                       Click any "Briefcase" icon to add an item

Typical Application click for larger image Typical bus configuration	Block Diagram click for larger image Block Diagram
Typical Performance click for larger image INL vs. Code

Datasheet

Title		Size	Date	Other Language
	DAC121C081/ DAC121C085 12-Bit Micro Power Digital-to-Analog Converter with an I2C-Compatible Interface	689 Kbytes	13-Mar-08	日本語

Featured Application Notes

Title		Size	Date	Other Language
	AN-293: Application Note 293 Control Applications of CMOS DACs	385 Kbytes	4-Oct-04

More Application Notes

Title		Size	Date	Other Language
	AN-269: Application Note 269 Circuit Applications of Multiplying CMOS D to A Converters	295 Kbytes	4-Oct-04

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
DAC121C085CIMM	CMOS7	0	18406	0	0	1089000	4	309006723
DAC121C085CIMMX	CMOS7	0	18406	0	0	1089000	4	309006723

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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