Specifications

131Motor Control: Recommended Solutions
Part Description Features Benefits
Operational Amplifiers
MAX9617/18/19/20 High efficiency, zero drift, op amps
with low noise and RRIO
10µV (max) V
OS
over time and
temperature range of -40°C to
+125°C, 59µA supply current,
1.5MHz GBW, SC70 package
Allow sensing low-side motor
current with high accuracy at low
power consumption.
MAX9943/44 38V precision, single and dual op
amps
Wide 6V to 38V supply range, low
100µV (max) input offset voltage,
drives 1nF loads
Wide operating voltage range
and precision performance under
most capacitive loads provide
signal processing in wide range of
applications.
Hall-Effect Sensor Interface
MAX9621 Dual, 2-wire Hall-effect sensor
interface
Analog and filtered digital
outputs, high-side current sense,
60V capability, detects short to
ground fault
Integration eases motor control
design.
Temperature Sensors
MAX31723 Digital thermostat with SPI/3-wire
interface
No external components, -55°C
to +125°C measurement range,
±0.5°C accuracy, configurable
9- to 12-bit resolution, nonvolatile
thermostat thresholds
Eases processor burden by storing
temperature thresholds internally
in nonvolatile memory.
MAX31855 Thermocouple-to-digital converter Cold-junction compensated; works
with K, J, N, T, or E types; 14-bit, SPI
interface; -270°C to +1800°C
Simplifies system design while
providing flexibility for various
thermocouple types.
Variable Reluctance (VR) Sensor Interface
MAX9924–MAX9927 Reluctance (VR or magnetic coil)
sensor interfaces
Integrated precision amplifier
and comparator for small-signal
detection, flexible threshold
options, differential input stage,
zero-crossing detection
Improve performance by
accurately detecting position and
speed of motors and rotating
shafts.
MOSFET Drivers
MAX15012 Half-bridge gate driver for high-
and low-side MOSFETs with 2A
peak source/sink current drive
UVLO, fast (35ns typ) and matched
(8ns max) propagation delays,
175V high-side MOSFET voltage
capability
Prevents MOSFET damage due to
supply brownout; allows higher
frequency switching applications;
allows use in high voltage
applications.
MAX15024 Low-side, 4A MOSFET drivers Single/dual operation, 16ns
propagation delay, high sink/
source current, 1.9W thermally
enhanced TDFN package
Shrinks designs with small
package and allows fast switching
with tightly matched propagation
delays.
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