MAX4481MXT Просмотр технического описания (PDF) - Maxim Integrated

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MAX4481MXT

(MAX4480–MAX4483) Single/Dual/Quad, Low-Cost, Single-Supply, Rail-to-Rail Op Amps with Shutdown

Maxim Integrated 

MAX4480–MAX4483

Single/Dual/Quad, Low-Cost, Single-Supply,

Rail-to-Rail Op Amps with Shutdown

50mV/div

CL = 1nF

20μs/div

Figure 2. Small-Signal Transient Response with Excessive

Capacitive Load

RISO

MAX4480

CL

MAX4481

MAX4482

MAX4483

Figure 3. Capacitive-Load-Driving Circuit

2V/div

VDD

2V/div

OUT

1V/div

RL = 10MΩ TO VSS, CL = 25pF

400μs/div

Figure 4. Shutdown Waveform

4μs/div

Figure 5. Power-Up/Down Waveform

circuit’s response by isolating the load capacitance

from the op amp’s output.

Applications Information

Shutdown Mode

The MAX4481 features a low-power shutdown mode.

When SHDN goes low, the supply current drops to

0.05µA (typ) and the output enters a high-impedance

state. Pull SHDN high to enable the amplifier. Do not

leave SHDN floating. Figure 4 shows the shutdown

waveform.

Power-Up

The MAX4480–MAX4483 outputs typically settle within

50µs after power-up. Figure 5 shows the output voltage

on power-up and power-down.

Power Supplies and Layout

The MAX4480–MAX4483 operate from a single +2.5V to

+5.5V power supply. Bypass the power supply with a

0.1µF capacitor to ground.

Good layout techniques optimize performance by

decreasing the amount of stray capacitance at the op

amp’s inputs and outputs. To decrease stray capaci-

tance, minimize trace lengths by placing external com-

ponents close to the op amp’s pins.

PROCESS: BiCMOS

Chip Information

8

Maxim Integrated

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