Specifications
18 Control and Automation Solutions Guide
Improve System Accuracy for High-Voltage
Applications in a Harsh Environment with
High-Precision Output Conditioners and
Drivers
MAX9943/MAX9944
The MAX9943/MAX9944 are high-voltage ampliers (6V to 38V) that oer
precision (100µV
OS
), low drift (0.4µV/°C), and low 550µA power consumption.
The devices are ideal for sensor signal conditioning, high-performance industrial
instrumentation, and loop-powered systems (e.g., 4–20mA transmitters).
Benefits
• Easily drives 24V biased 4–20mA lines
throughout factory floors
◦ High supply-voltage operation and
high-output drive exceed current-
mode communication requirements
-18V
R
SENSE
R
LOAD
V
REF
+18V
1/2
1/2
MAX9944
MAX9944
Wide 6V to
38V supply
voltage
High 25mA output
current to drive
4–20mA loop-powered
systems
Stable with up to
1nF capacitive load
Low 550μA quiescent
current helps reduce
static system power
dissipation
Low 100μV (max)
input voltage offset V
OS
The MAX9944 accurately drives loads.