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

Datasheets

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

Part Number(s) (NSID)	Top View	Availability	Current Reported Stock	Budgetary Pricing	Standard Pack Size
DAC121C081CIMK/NOPB DAC121C081CIMK RoHS Status	TSOT	Full production Lead Time: 6 weeks	Distributor Region Qty ARROW Worldwide 1000 AVNET-EM Worldwide 1000 DIGIKEY Worldwide 1723 FUTURE Worldwide 1100 NEWARK Americas 720 RS COMPONENTS Worldwide 991	$1.15 each at 1K+ pcs	reel of 1000
DAC121C081CIMKX/NOPB DAC121C081CIMKX RoHS Status	TSOT	Full production Lead Time: 12 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$1.15 each at 1K+ pcs	reel of 3000
DAC121C081CISD/NOPB DAC121C081CISD RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 324	$1.15 each at 1K+ pcs	reel of 1000
DAC121C081CISDX/NOPB DAC121C081CISDX RoHS Status	LLP	Full production Lead Time: 6 weeks	Distributor Region Qty DIGIKEY Worldwide 0	$1.15 each at 1K+ pcs	reel of 4500

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

Part Number(s) (NSID)	Top View	Type	Pins	MSL Rating	Peak Reflow	RoHS Status	CAD Symbols	Models	Package Marking Format
DAC121C081CIMK/NOPB DAC121C081CIMK		TSOT	6	1 1	260 260	Detail	Download	N/A	X84C XTT
DAC121C081CIMKX/NOPB DAC121C081CIMKX		TSOT	6	1 1	260 260	Detail	Download	N/A	X84C XTT
DAC121C081CISD/NOPB DAC121C081CISD		LLP	6	1 1	260 260	Detail	Download	N/A	XTT X87
DAC121C081CISDX/NOPB DAC121C081CISDX		LLP	6	1 1	260 260	Detail	Download	N/A	XTT X87

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.

CAD Symbols and Models Download DAC121C081 CAD Symbols

Models N/A

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
DAC121C081CIMK	CMOS7	0	18406	0	0	1089000	4	309006723
DAC121C081CIMKX	CMOS7	0	18406	0	0	1089000	4	309006723
DAC121C081CISD	CMOS7	0	18406	0	0	1089000	4	309006723
DAC121C081CISDX	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.

For more information on Reliability Metrics, please click here.

All information pertaining to the RoHS Compliance Standard can be found at http://www.national.com/packaging/leadfree.

A RoHS compliance or an IPC 1752 report can be acquired at http://www.national.com/quality/green.

National's certificate of product compliance is located at RoHS Status.