10MHz/42MHz Low Noise, Low Bias Op-Amps

 

Part Number	Replacement	Explanation

Description

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The MAX40075/MAX40088 are wideband, low-noise, low-input bias current operational amplifiers offering rail-to-rail outputs and single-supply operation down to 2.7V. They draw 2.2mA of quiescent supply current per amplifier when enabled. Ultra-low distortion (0.0002% THD+N), as well as low input voltage-noise density (4.2nV/√Hz) and low input current-noise density (0.5fA/√Hz). The low input bias current and low noise together with the wide bandwidth will suit transimpedance amplifiers and imaging applications.

For power conservation, the MAX40075/MAX40088 offer a low-power shutdown mode that reduces supply current to 0.1μA and places the amplifiers outputs into a high impedance state. These amplifiers have outputs which swing rail-to-rail and their input common-mode voltage range includes ground. The MAX40075 is unity-gain stable with a gain-bandwidth product of 10MHz. The MAX40088 is gain-of-5 stable with a gain-bandwidth product of 42MHz.

MAX40075, MAX40088: Functional Diagrams Enlarge+

Key Features

• Low Input Voltage-Noise Density: 4.2nV/√Hz at 30kHz
• Low Input Current-Noise Density: 0.5fA/√Hz
• Low Input Bias Current: <1pA (Typical)
• Low Distortion: 0.00035% or -109dB THD+N (1kΩ Load)
• Single-Supply Operation from +2.7V to +5.5V
• Input Common-Mode Voltage Range Includes Ground
• Rail-to-Rail Output Swings with a 1kΩ Load
• 10MHz GBW Product, Unity-Gain Stable (MAX40075 only)
• 42MHz GBW Product, Gain ≥ 5V/V (MAX40088 Only)
• Excellent DC Characteristics: Input V_OS ≤ 70μV
• Low-Power Shutdown Mode: Reduces Supply Current to ≤1μA
• Available in Space-Saving 6-SOT23 and 6-WLP Packages
• AEC-Q100 Qualified, Refer to Ordering Information

Applications/Uses

• ADC Buffers
• Automotive Power Train
• DAC Output Amplifiers
• Digital Scales
• Low-Noise Microphone/Preamplifiers
• Medical Instrumentation
• Strain Gauges/Sensor Amplifiers
• Transimpedance Amplifiers