UCSP, Single-Supply, Low-Noise, Low-Distortion, Rail-to-Rail Op Amps

 

Part Number	Replacement	Explanation

Description

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The MAX4249–MAX4257 low-noise, low-distortion operational amplifiers offer rail-to-rail outputs and single-supply operation down to 2.4V. They draw 400µA of quiescent supply current per amplifier while featuring ultra-low distortion (0.0002% THD), as well as low input voltage-noise density (7.9nV/) and low input current-noise density (0.5fA/). These features make the devices an ideal choice for portable/battery-powered applications that require low distortion and/or low noise.

For additional power conservation, the MAX4249/MAX4251/MAX4253/MAX4256 offer a low-power shutdown mode that reduces supply current to 0.5µA and puts the amplifiers' outputs into a high-impedance state. The MAX4249–MAX4257's outputs swing rail-to-rail and their input common-mode voltage range includes ground. The MAX4250–MAX4254 are unity-gain stable with a gain-bandwidth product of 3MHz. The MAX4249/MAX4255/MAX4256/MAX4257 are internally compensated for gains of 10V/V or greater with a gain-bandwidth product of 22MHz. The single MAX4250/MAX4255 are available in space-saving 5-pin SOT23 packages. The MAX4252 is available in an 8-bump chip-scale package (UCSP^™) and the MAX4253 is available in a 10-bump UCSP. The MAX4250AAUK comes in a 5-pin SOT23 package and is specified for operation over the automotive (-40°C to +125°C) temperature range.

MAX4249, MAX4250, MAX4251, MAX4252, MAX4253, MAX4254, MAX4255, MAX4256, MAX4257: Typical Operating Circuit Enlarge+

Key Features

• Available in Space-Saving UCSP, SOT23, and µMAX® Packages
• Low Distortion: 0.0002% THD (1kΩ load)
• 400µA Quiescent Supply Current per Amplifier
• Single-Supply Operation from 2.4V to 5.5V
• Input Common-Mode Voltage Range Includes Ground
• Outputs Swing Within 8mV of Rails with a 10kΩ Load
• 3MHz GBW Product, Unity-Gain Stable (MAX4250-MAX4254)
• 22MHz GBW Product, Stable with AV ≥ 10V/V (MAX4249/MAX4255/MAX4256/MAX4257)
• Excellent DC Characteristics
  • V_OS = 70µV
  • I_BIAS = 1pA
  • Large-Signal Voltage Gain = 116dB
• Low-Power Shutdown Mode
  • Reduces Supply Current to 0.5µA
  • Places Outputs in a High-Impedance State
• 400pF Capacitive-Load Handling Capability

Applications/Uses

• ADC Buffers
• Automatic Test Equipment (ATE)
• Cardiac Monitor
• Digital Scales/Strain Gauges
• Displays: Industrial, Front Panel, and Instrumentation
• Industrial: Process Measurement and Control
• Medical Instrumentation
• PA Control
• Panel Meters
• Portable Battery-Powered Equipment
• Power Meters
• Programmable Logic Controllers (PLCs)
• Wireless Communications Devices