MAX44251:20V, Ultra-Precision, Low-Noise Op Amps

Innovative Combination of High Voltage (2.7V to 20V) Capability, Industry's Lowest Noise, and Autozero Precision in a SOT23 Package

The MAX44250/MAX44251/MAX44252 are 20V, ultra-precision, low-noise, low-drift amplifiers that offer nearzero 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/ 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 123nVP-P noise in 0.1Hz to 10Hz, the ICs are ideally suited for applications requiring ultra-low noise and DC precision such as interfacing 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®, and 14-pin SO packages and are rated over the -40°C to +125°C temperature range.

Key Features
  • High Accuracy Enables Precision Signal Chain Acquisition
    • 6µV Input Offset Voltage (max) at Room Temperature
    • TCVOS of 19nV/°C (max)
    • Low 5.9nV/ Input-Referred Voltage Noise
    • 123nVP-P in 0.1Hz to 10Hz
    • 10MHz Gain-Bandwidth Product
    • Rail-to-Rail Output
    • Fast 400ns Settling Time
  • 2.7V to 20V Power-Supply Range Supports Wide Range of Sensors
  • Integrated EMI Filter Reduces Impact of Radio Frequency Interference on Signal Chain Performance
MAX44251, MAX44252: Typical Operating Circuit
MAX44251, MAX44252: Typical Operating Circuit
  • Load Cell and Bridge Transducer Amplification
  • Medical Instrumentation
  • Precision Instrumentation
  • Pressure Transducers
  • Strain Gauges
titleDownload file
MAX44250-MAX44252 Data SheetMAX44250-MAX44252.pdf
Part NumberAmps.Rail to RailVSUPPLY (Total)
ICC per Amp.
Unity Gain BW
Slew Rate
minmaxtypmaxtyptypmaxtyptyp<See Notes
MAX442501Output Only2.720122091401451.41085.9µMAX/8
$0.98 @1k
$1.28 @1k
MAX442524115061.3SOIC(N)/14$2.28 @1k
Design kits & evaluation modules
Quality and Environmental Data
Ordering Information
Part NumberStatusRecommended ReplacementPackageTempRoHS
MAX44251AKA+ActiveSOT,;8 pin;9 mm²-40°C to +85°CLead Free
MAX44251AKA+TActiveSOT,;8 pin;9 mm²-40°C to +85°CLead Free
MAX44251AUA+ActiveµMAX,;8 pin;15.6 mm²-40°C to +125°CLead Free
MAX44251AUA+TActiveµMAX,;8 pin;15.6 mm²-40°C to +85°CLead Free
MAX44250-MAX44252.pdf MAX44252
MAX44251-MAX44252_cn.pdf MAX44252
The Zero-Transistor IC, a New Plateau in IC Design MAX5492
MAX44251.pdf MAX44251
MAX44251-MAX44252_cn.pdf MAX44252