Specifications

52 Control and Automation Solutions Guide
Featured Products
Flexible ADCs Interface with a Wide Range of
Sensor Signal Levels
MAX1415/MAX1416
Pressure sensors commonly have high sensitivity to temperature. Therefore, a
pressure sensor circuit should monitor temperature as well as the output of the
pressure sensor. The MAX1415/MAX1416 feature two dierential inputs that allow
measurement of both pressure and temperature (using a resistance temperature
detector, RTD). Dierential reference inputs allow ratiometric measurement of
the 3V excitation voltage. The MAX1415 requires a single 2.7V to 3.6V supply, and the
MAX1416 requires a single 4.75V to 5.25V supply.
Benefits
• Match a wide range of sensor signal
levels
◦ On-chip PGA allows as low as 20mV
full-scale range (FSR) to match
sensor output
• Feature integration reduces design
complexity
◦ Built-in self- and system-calibration
modes improve accuracy and
shorten design time
◦ Built-in digital filter for 50Hz/60Hz
rejection removes unwanted
powerline interference
• Simplify multichannel ratiometric/
bridge-type designs
◦ Differential reference input for
ratiometric measurement common
to bridge-type circuits
◦ Two differential channels measure
pressure and temperature
AIN1+
AIN1−
AIN2+
V3
SPI
INTERFACE
AIN2−
REF+ REF−
HEL 777
RTD
R1
NPI-19 SERIES
NovaSensor
®
PRESSURE SENSOR
V
S1
V
S2
MAX1415
PGA
Flexible MAX1415 ADC interfaces with pressure and temperature sensors.