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MAX4488 Datasheet(PDF) 11 Page - Maxim Integrated Products |
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MAX4488 Datasheet(HTML) 11 Page - Maxim Integrated Products |
11 / 21 page capacitor placed close to the VDD pin. If operating from dual supplies, bypass each supply to ground. Good layout improves performance by decreasing the amount of stray capacitance and noise at the op amp’s inputs and output. To decrease stray capacitance, min- imize PC board trace lengths and resistor leads, and place external components close to the op amp’s pins. Typical Application Circuit The Typical Application Circuit shows the single MAX4475 configured as an output buffer for the MAX5541 16-bit DAC. Because the MAX5541 has an unbuffered voltage output, the input bias current of the op amp used must be less than 6nA to maintain 16-bit accuracy. The MAX4475 has an input bias current of only 150pA (max), virtually eliminating this as a source of error. In addition, the MAX4475 has excellent open- loop gain and common-mode rejection, making this an excellent ouput buffer amplifier. DC-Accurate Lowpass Filter The MAX4475–MAX4478/MAX4488/MAX4489 offer a unique combination of low noise, wide bandwidth, and high gain, making them an excellent choice for active filters up to 1MHz. The Typical Operating Circuit shows the dual MAX4477 configured as a 5th order Chebyschev filter with a cutoff frequency of 100kHz. The circuit is implemented in the Sallen-Key topology, making this a DC-accurate filter. MAX4475–MAX4478/MAX4488/MAX4489 SOT23, Low-Noise, Low-Distortion, Wide-Band, Rail-to-Rail Op Amps 11 Maxim Integrated Typical Application Circuit 0 to +2.5V OUTPUT SHDN 8 4 CS SCLK DIN 2 3 SERIAL INTERFACE VDD DGND REF OUT AGND +5V +2.5V +5V 7 6 U1 MAX5541ESA U2 MAX 4475AUA Typical Operating Circuit 1 2 3 4 5 6 7 8 470pF 3.09k Ω 1% 3.83k Ω 1% 13.7k Ω 1% 7.87k Ω 1% 10.0k Ω 1% 10.0k Ω 1% 15.0k Ω 1% 7.15k Ω 1% 10.0k Ω 1% 0.1 µF 220pF 220pF 220pF 220pF 5V MAX4477 1/2 MAX4477 1/2 |
Similar Part No. - MAX4488_12 |
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Similar Description - MAX4488_12 |
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