MAX4480–MAX4483 Single/Dual/Quad, Low-Cost, Single-Supply, Rail-to-Rail Op Amps with Shutdown RISO 50mV/div CL MAX4480MAX4481MAX4482MAX4483 CL = 1nF 20µs/div Figure 2. Small-Signal Transient Response with Excessive Figure 3. Capacitive-Load-Driving Circuit Capacitive Load VDD 2V/div 2V/div OUT 1V/div RL = 10MΩ TO VSS, CL = 25pF 400µs/div 4µs/div Figure 4. Shutdown Waveform Figure 5. Power-Up/Down Waveform Applications InformationPower Supplies and LayoutShutdown Mode The MAX4480–MAX4483 operate from a single +2.5V to +5.5V power supply. Bypass the power supply with a The MAX4481 features a low-power shutdown mode. 0.1μF capacitor to ground. When SHDN goes low, the supply current drops to 0.05μA (typ) and the output enters a high-impedance state. Pull Good layout techniques optimize performance by SHDN high to enable the amplifier. Do not leave SHDN decreasing the amount of stray capacitance at the op floating. Figure 4 shows the shutdown waveform. amp’s inputs and outputs. To decrease stray capacitance, minimize trace lengths by placing external components Power-Up close to the op amp’s pins. The MAX4480–MAX4483 outputs typically settle within 50μs after power-up. Figure 5 shows the output voltage Chip Information on power-up and power-down. PROCESS: BiCMOS www.maximintegrated.com Maxim Integrated │ 8
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