Description

The MAX4257ESA+ is a low-noise, low-distortion operational amplifier belonging to the Instrumentation OpAmps category. It has Rail-to-ail® outputs and can operate on single supply voltages as low as 2.4V while maintaining ultra-low distortion (0.0002% THD). This makes it an excellent choice for low distortion and/or low noise applications, particularly for portable/battery-powered devices.

Specifications and features

• Low Input Voltage Noise Density: 7.9nV/√Hz
• Low Input Current Noise Density: 0.5fA/√Hz
• 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: VOS = 70µV, IBIAS = 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
• Available in Space-Saving SOT23 and µMAX Packages

Application Scenarios

The MAX4257ESA+ can be used in a wide variety of applications including but not limited to:

• Audio amplifiers
• Signal conditioning circuits
• Portable/battery-powered devices
• Low-distortion/low-noise circuits

Comparison

• Low input voltage noise density and low input current noise density result in low distortion and low noise output.
• Rail-to-rail® outputs and single-supply operation allow for greater versatility in system applications.
• Low quiescent supply current enables use in portable/battery-powered devices.
• Low-power shutdown mode further reduces power consumption and increases battery life.

• The MAX4257ESA+ may not be suitable for applications requiring high output current.
• While the device can operate on single supply voltages as low as 2.4V, its maximum supply voltage is limited to 5.5V.