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MAX5214/16 - Low-Power, High-Performance, Buffered Single DACs

Maxim MAX521416-iconThe MAX5214/MAX5216 from Maxim are pin-compatible, 14-bit and 16-bit Digital-to-Analog Converters (DACs). The MAX5214/MAX5216 are single-channel, low-power, buffered voltage-output DACs. 

The devices use a precision external reference applied through the high resistance input for rail-to-rail operation and low system power consumption. The MAX5214/MAX5216 accept a wide 2.7...5.25 V supply voltage range. Power consumption is extremely low to accommodate most low-power and low-voltage applications. These devices feature a 3-wire SPI™-/QSPI™-/MICROWIRE™-/DSP-compatible serial interface to save board space and to reduce the complexity in isolated applications. 

The MAX5214/MAX5216 minimize the digital noise feedthrough from input to output with SCLK and DIN input buffers powered down after completion of each serial input frame. On power-up, the MAX5214/MAX5216 reset the DAC output to zero, providing additional safety for applications that drive valves or other transducers that need to be off on power-up. The DAC output is buffered resulting in a low supply current of 80 µA (max) and a low offset error of ±0.25 mV. 

A zero level applied to the active-low CLR pin asynchronously clears the contents of the input and DAC registers and sets the DAC output to zero independent of the serial interface. The MAX5214/MAX5216 are available in an ultra-small (3mm x 3mm), 8-pin µMAX® package and are specified over the -40...+105°C extended industrial temperature range.

MAX5214/16 Features

  • Low-Power consumption (80 µA max) 
  • 14-/16-Bit resolution in a 3mm x 3mm, 8-Pin µMAX package 
  • Relative accuracy:
    - ±0.25 LSB INL (MAX5214, 14-Bit)
    - ±1 LSB INL (MAX5216, 16-Bit) 
  • Guaranteed monotonic over all operating range 
  • Low gain and offset error 
  • Wide 2.7...5.25 V supply range 
  • Rail-to-Rail buffered output operation 
  • Safe Power-On Reset (POR) to zero DAC output 
  • Fast 50 MHz, 3-Wire, SPI/QSPI/MICROWIRE-compatible serial interface 
  • Schmitt-Trigger inputs for direct optocoupler interface 
  • Asynchronous active-low CLR clears DAC output to code 0 
  • High reference input resistance for power reduction 
  • Buffered voltage output directly drives 10 kΩ loads 

MAX5214/16 Applications

  • 2-Wire sensors
  • Automatic test equipment
  • Automatic tuning
  • Communication systems
  • Gain and offset adjustment
  • Portable instrumentation
  • Power amplifier control
  • Process control and servo loops
  • Programmable voltage and current sources

MAX5214/16 Block Diagram
Maxim MAX5214 MAX5216 bd
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