MAX44250_13 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – 20V, Ultra-Precision, Low-Noise Op Amps

EVALUATION KIT AVAILABLE
MAX44250/MAX44251/MAX44252
20V, Ultra-Precision, Low-Noise Op Amps
General Description
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
±1.35V 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.
With excellent specifications such as offset voltage of
6µV (max), drift of 19nV/°C (max), and 123nV_P-P noise in
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.
The ICs are available in 5-pin SOT23, 8-pin SOT23,
8-pin µMAX^M, and 14-pin SO packages and are rated
over the -40°C to +125°C temperature range.
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.
Benefits and Features
S 2.7V to 20V Power-Supply Range
S Integrated EMI Filter
S 6µV Input Offset Voltage (max) at Room
Temperature
S TCV_OS of 19nV/°C (max)
S Low 5.9nV/√Hz Input-Referred Voltage Noise
S 123nV_P-P in 0.1Hz to 10Hz
S Fast 400ns Settling Time
S 10MHz Gain-Bandwidth Product
S Rail-to-Rail Output
S High Accuracy Enables Precision Signal Chain
Acquisition
Applications
Strain Gauges
Pressure Transducers
Medical Instrumentation
Precision Instrumentation
Load Cell and Bridge Transducer Amplification
Functional Diagrams appear at end of data sheet.
Typical Operating Circuit
3.3V
+10V
MAX44251
BUFFER
R
10V
3V _VOUT
R1
MAX6126
V_DD
-10V
R
+10V
50RG
RG
50R_G
MAX44251 _BUFFER
R
VDD VREF
VIN+
MAX11211^OUTPUT
MICRO-
PROCESSOR
+10V
-10V
VIN-
VSS
R
BUFFER
MAX44251 ^1.5V
C1
-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