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DAC101C081 Dataheets PDF



Part Number DAC101C081
Manufacturers National Semiconductor
Logo National Semiconductor
Description 12-Bit Micro Power Digital-to-Analog Converter
Datasheet DAC101C081 DatasheetDAC101C081 Datasheet (PDF)

DAC121C081/ DAC121C085 12-Bit Micro Power Digital-to-Analog Converter with an I2C-Compatible Interface www.DataSheet4U.com December 20, 2007 DAC121C081/ DAC121C085 12-Bit Micro Power Digital-to-Analog Converter with an I2C-Compatible Interface General 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 8.5usec settling time. The DAC12.

  DAC101C081   DAC101C081


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DAC121C081/ DAC121C085 12-Bit Micro Power Digital-to-Analog Converter with an I2C-Compatible Interface www.DataSheet4U.com December 20, 2007 DAC121C081/ DAC121C085 12-Bit Micro Power Digital-to-Analog Converter with an I2C-Compatible Interface General 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 8.5usec settling time. The DAC121C081 uses the supply voltage as the reference to provide the widest dynamic output range and typically consumes 132uA 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 I2C 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, I2C-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 powerdown 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. Features ■ ■ ■ ■ Guaranteed Monotonicity to 12-bits Low Power Operation: 156 µA max @ 3.3V Extended power supply range (+2.7V to +5.5V) I2C-Compatible 2-wire Interface which supports standard (100kHz), fast (400kHz), and high speed (3.4MHz) modes ■ Rail-to-Rail Voltage Output ■ Very small 6-pin TSOT and LLP Packages Key Specifications ■ ■ ■ ■ ■ ■ ■ Resolution INL DNL Settling Time Zero Code Error Full-Scale Error Supply Power — Normal — Power Down 12 bits ±8 LSB (max) +0.6 / -0.5 LSB (max) 8.5 µs (max) +10 mV (max) −0.7 %FS (max) 380 µW (3V) / 730 µW (5V) typ 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 Pin-Compatible Alternatives All devices are fully pin and function compatible. Resolution TSOT-6 and LLP-6 MSOP-8 Package w/ Packages External Reference 12-bit 10-bit 8-bit DAC121C081 DAC101C081 DAC081C081 DAC121C085 DAC101C085 DAC081C085 Connection Diagrams 30004901 30004902 30004910 I2C® is a registered trademark of Phillips Corporation. © 2007 National Semiconductor Corporation 300049 www.national.com DAC121C081/ DAC121C085 Ordering Information Order Code DAC121C081CIMK DAC121C081CIMKX DAC121C081CISD DAC121C081CISDX DAC121C085CIMM DAC121C085CIMMX DAC121C08XEB Temperature Range −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C −40°C ≤ TA ≤ +125°C Package TSOT TSOT Tape-and-Reel LLP LLP Tape-and-Reel MSOP MSOP Tape-and-Reel Evaluation Board www.DataSheet4U.com Top Mark X84C X84C X87 X87 X90C X90C Block Diagram 30004903 www.national.com 2 DAC121C081/ DAC121C085 Pin Descriptions Symbol VOUT VA GND Type Analog Output Supply Ground Digital Input/Output Equivalent Circuit Analog Output Voltage. www.DataSheet4U.com Description Power supply input. For the TSOT and LLP versions, this supply is used as the reference. Must be decoupled to GND. Ground for all on-chip circuitry. Serial Data bi-directional connection. Data is clocked into or out of the internal 16-bit register relative to the clock edges of SCL. This is an open drain data line that must be pulled to the supply (VA) by an external pull-up resistor. Serial Clock Input. SCL is used together with SDA to control the transfer of data in and out of the device. Tri-state Address Selection Input. Sets the two Least Significant Bits (A1 & A0) of the 7-bit slave address. (see Table 1) Tri-state Address Selection Input. Sets Bits A6 & A3 of the 7-bit slave address. (see Table 1) Unbufferred reference voltage. For the MSOP-8, this supply is used as the reference. VREF must be free of noise and decoupled to GND. Exposed die attach pad can be connected to ground or left floating. Soldering the pad to the PCB offers optimal thermal performance and enhances package selfalignment during reflow. SDA SCL Digital Input Digital Input, three levels Digital Input, t.


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