DAC121S101 Datasheet | National Semiconductor

Description The DAC121S101 is a full-featured, general purpose 12-bit voltage-output digital-to-analog converter (DAC) that can operate from a single +2.7V to 5.5V supply and consumes just 177 µA of current at 3.6 Volts. The on-chip output amplifier allows rail-to-rail output swing and the three wire serial interface operates at clock rates up to 30 MHz over the specified supply voltage range and is patible with standard SPI™, QSPI, MICROWIRE and DSP interfaces. petitive devices are limited to 20 MHz clock rates at supply voltages in the 2.7V to 3.6V range. The supply voltage for the DAC121S101 serves as its voltage reference, providing the widest possible output dynamic range. A power-on reset circuit ensures that the DAC output powers up to zero volts and remains there until there is a valid write to the device. A power-down feature reduces power consumption to less than a micro Watt. The low power consumption and small packages of the DAC121S101 make it an excellent choice for use in battery operated equipment. The DAC121S101 is a direct replacement for the AD5320 and the DAC7512 and is one of a family of pin patible DACs, including the 8-bit DAC081S101 and the 10-bit DAC101S101. The DAC121S101 operates over the extended industrial temperature range of - 40˚C to +105˚C. Features n n n n n n n n Guaranteed Monotonicity Low Power Operation Rail-to-Rail Voltage Output Power-on Reset to Zero Volts Output SYNC Interrupt Facility Wide power supply range (+2.7V to +5.5V) Small Packages Power Down Feature Key Specifications n n n n n n Resolution 12 bits DNL +0.25, -0.15 LSB (typ) Output Settling Time 8 µs (typ) Zero Code Error 4 m V (typ) Full-Scale Error - 0.06 %FS (typ) Power Consumption - Normal Mode 0.64m W (3.6V) / 1.43m W (5.5V) typ - Pwr Down Mode 0.14µW (3.6V) / 0.39µW (5.5V) typ Applications n n n n Battery-Powered Instruments Digital Gain and Offset Adjustment Programmable Voltage & Current Sources Programmable Attenuators Pin...