Specifications

10 Maxim Industrial Solutions
Programmable logic controllers (PLCs)
Analog input function
Benefits
• Maintain system calibration and
accuracy over time and temperature
with low-temperature coefficients
– Autozero technology reduces voltage
offset temperature coefficient (TCV
OS
)
to 10nV/°C and V
OS
to only 2.5µV( max)
• Improve system accuracy and
resolution with low-input voltage noise
– No 1/f component ensures low-distortion
signal conditioning below 0.1Hz with
30nV input-voltage noise density
MAX4238/MAX4239
The MAX4238/MAX4239 are low-noise, low-drift, ultra-high-precision
amplifiers. They offer near-zero DC offset and drift by using patented
autocorrelating zeroing techniques.* This method constantly
measures and compensates the input offset, thereby eliminating
drift over time and temperature and the effect of 1/f noise.
*U.S. Patent #6,734,723.
Improve accuracy with precision over time and precision over temperature from
ultra-high-precision op amps
The MAX4238/MAX4239 op amps are ideal for driving ADCs.
360Ω
STRAIN GAUGE
18kΩ
18kΩ
AIN
5V
A
V
= 100
ADC
MAX4238
MAX4239