Specifications

14 Control and Automation Solutions Guide
Featured Products
DACs Ideal for Loop-Powered Applications
Without Sacricing Precision and Accuracy
for Low Power
MAX5214/MAX5216
The MAX5214/MAX5216 are pin-compatible, 14-bit and 16-bit single-channel,
low-power, buered voltage-output DACs. Power consumption is extremely low
in order to accommodate low-power and low-voltage applications, yet the parts
accept a wide 2.7V to 5.25V supply voltage range. The DAC output is buered,
resulting in a low supply current of 80µA (max) and a low oset error of ±0.25mV.
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.
A precision external reference is applied through the high resistance input for rail-
to-rail operation and low system power consumption. Digital noise feedthrough
is minimized by powering down the SCLK and DIN buers after completion of
each serial input frame. On power-up, the DAC output is reset to zero, providing
additional safety for applications that drive valves or other transducers that need
to be o during power-up. In addition, 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 specied over the -40°C to +105°C extended industrial temperature range.
Benefits
• Ideal for loop-powered applications
◦ Low-power consumption (80µA
max)
• Small size and integrated features save
PCB area
◦ 14-/16-bit resolution in a 3mm x
5mm, 8-pin µMAX package
• Enables high-accuracy performance in
industrial environments
◦ ±0.25 LSB INL (MAX5214, 14-bit)
◦ ±1 LSB INL (MAX5216, 16-bit)
◦ Guaranteed monotonic over the
operating range
◦ Low gain and offset error
ISOLATING POWER SUPPLY
V/I
4–20mA LOOP IN
4–20mA LOOP OUT
SENSOR IN
LOW-CURRENT SENSOR CONDITIONER
3mA MAXIMUM POWER BUDGET
MAX5214/16
DAC
80µA MAXIMUM
ISOµPADC