|DAC122S085 12-Bit Micro Power DUAL Digital-to-Analog Converter with Rail-to-Rail Output
The is a full-featured, general purpose DUAL 12-bit voltage-output digital-to-analog converter (DAC) that can operate from a single to 5.5V supply and uses at 3V and at 5V. The DAC122S085 is packaged a 10-lead MSOP package. The on-chip output amplifier allows rail-to-rail output swing and the three wire serial interface operates at clock rates to 40 MHz over the entire supply voltage range. Competitive devices are limited to 25 MHz clock rates at supply voltages in the to 3.6V range. The serial interface is compatible with standard SPITM, QSPI, MICROWIRE and DSP interfaces. The reference for the DAC122S085 serves all four channels and can vary in voltage between 1V and VA, providing the widest possible output dynamic range. The DAC122S085 has a 16-bit input shift register that controls the outputs to be updated, the mode of operation, the powerdown condition, and the binary input data. Both outputs can be updated simultaneously or individually depending on the setting of the two mode of operation bits. 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 microWatt with three different termination options. The low power consumption and small packages of the DAC122S085 make it an excellent choice for use in battery operated equipment. The DAC122S085 is one of a family of pin compatible DACs, including the 8-bit DAC082S085 and the 10-bit DAC102S085. The DAC122S085 operates over the extended industrial temperature range to +105�C.Features
Guaranteed Monotonicity Low Power Operation Rail-to-Rail Voltage Output Power-on Reset to 0V Simultaneous Output Updating Wide power supply range to +5.5V) Power Down Modes
Resolution INL DNL Settling Time Zero Code Error Full-Scale Error Supply Current Normal Pwr Down 12 bitsApplications
Battery-Powered Instruments Digital Gain and Offset Adjustment Programmable Voltage & Current Sources Programmable Attenuators
Order Numbers DAC122S085CIMMX DAC122S085EVAL Temperature Range TA +105�C Package MSOP Tape-and-Reel Evaluation Board (MSOP) Top Mark X72C
MSOP Pin No. Symbol VA VOUTA VOUTB NC GND VREFIN Ground Analog Input Type Supply Analog Output Analog Output Description Power supply input. Must be decoupled to GND. Channel A Analog Output Voltage. Channel B Analog Output Voltage. Not Connected Not Connected Ground reference for all on-chip circuitry. Unbuffered reference voltage shared by both channels. Must be decoupled to GND. Serial Data Input. Data is clocked into the 16-bit shift register on the falling edges of SCLK after the fall of SYNC. Frame synchronization input for the data input. When this pin goes low, it enables the input shift register and data is transferred on the falling edges of SCLK. The DAC is updated on the 16th clock cycle unless SYNC is brought high before the 16th clock, in which case the rising edge of SYNC acts as an interrupt and the write sequence is ignored by the DAC. Serial Clock Input. Data is clocked into the input shift register on the falling edges of this pin.
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