14-/16-Bit, Low-Power, Buffered Output, Rail-to-Rail DACs with SPI Interface

The MAX5214/MAX5216 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 2.7V to 5.5V 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 80µA (max) and a low offset error of ±0.25mV. 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 5mm), 8-pin µMAX® package and are specified over the -40°C to +105°C extended industrial temperature range.

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

* Low-Power Consumption (80µA max)

* 14-/16-Bit Resolution in a 3mm x 5mm, 8-Pin µMAX Package

* Relative Accuracy

* ±0.40 LSB INL (MAX5214, 14-Bit typ, ±1 LSB max)

* ±1.2 LSB INL (MAX5216, 16-Bit typ, ±4 LSB max)

* Guaranteed Monotonic Over All Operating Ranges

* Low Gain and Offset Error

* Wide 2.7V to 5.5V Supply Range

* Rail-to-Rail Buffered Output Operation

* Safe Power-On Reset (POR) to Zero DAC Output

* Fast 50MHz, 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 10kΩ Loads