EVALUATION KIT AVAILABLE
MAX44250/MAX44251/MAX44252
20V, Ultra-Precision, Low-Noise Op Amps
General Description
Benefits and Features
The MAX44250/MAX44251/MAX44252 are 20V, ultra-
precision, low-noise, low-drift amplifiers that offer near-
zero DC offset and drift through the use of patented auto-
correlating zeroing techniques. This method constantly
measures and compensates the input offset, eliminating
drift over time and temperature and the effect of 1/f noise.
These single, dual, and quad devices feature rail-to-rail
outputs, operate from a single 2.7V to 20V supply or dual
1.ꢀ5V to 10V supplies and consume only 1.15mA
per channel, while providing 5.9nV/√Hz input-referred
voltage noise. The ICs are unity-gain stable with a gain-
bandwidth product of 10MHz.
S 2.7V to 20V Power-Supply Range
S Integrated EMI Filter
S 6µV Input Offset Voltage (max) at Room
Temperature
S TCV
of 19nV/°C (max)
OS
S Low 5.9nV/√Hz Input-Referred Voltage Noise
S 123nV in 0.1Hz to 10Hz
P-P
S Fast 400ns Settling Time
S 10MHz Gain-Bandwidth Product
S Rail-to-Rail Output
With excellent specifications such as offset voltage of
S High Accuracy Enables Precision Signal Chain
6µV (max), drift of 19nV/°C (max), and 12ꢀnV
noise in
P-P
Acquisition
0.1Hz to 10Hz, the ICs are ideally suited for applications
requiring ultra-low noise and DC precision such as inter-
facing with pressure sensors, strain gauges, precision
weight scales, and medical instrumentation.
Applications
Strain Gauges
Pressure Transducers
Medical Instrumentation
The ICs are available in 5-pin SOT2ꢀ, 8-pin SOT2ꢀ,
8-pin µMAX , and 14-pin SO packages and are rated
M
over the -40°C to +125°C temperature range.
Precision Instrumentation
Load Cell and Bridge Transducer Amplification
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maximintegated.com/MAX44250.related.
Functional Diagrams appear at end of data sheet.
Typical Operating Circuit
3.3V
+10V
3V
MAX44251
V
OUT
R
BUFFER
R
1
MAX6126
10V
V
DD
+10V
-10V
R
V
V
REF
DD
50R
50R
G
MAX44251
R
V
BUFFER
-10V
IN+
R
G
MICRO-
G
PROCESSOR
OUTPUT
MAX11211
V
+10V
IN-
V
SS
R
BUFFER
1.5V
C
1
MAX44251
-10V
µMAX is a registered trademark of Maxim Integrated Products, Inc.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-6000; Rev 3; 4/13
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