MAX4486 Maxim, MAX4486 Datasheet - Page 6

• Manufacturer Part Number: MAX4486
• Description: The MAX4484/MAX4486/MAX4487 single/dual/quad low-cost general-purpose op amps operate from a single +2
• Manufacturer: Maxim

The MAX4484/MAX4486/MAX4487 can drive a 2kΩ
load and still swing within 50mV of the supply rails.
Figure 1 shows the output swing of the MAX4484 con-
figured with A
Driving a capacitive load can cause instability in many
op amps, especially those with low quiescent current.
The MAX4484/MAX4486/MAX4487 are unity-gain stable
for a range of capacitive loads up to 100pF. Figure 2
shows the response of the MAX4484 with an excessive
capacitive load. Adding a series resistor between the
output and the load capacitor (Figure 3) improves the
circuit’s response by isolating the load capacitance
from the op amp’s output.
Single/Dual/Quad, Low-Cost, Single-Supply
7MHz, Rail-to-Rail Op Amps
6
MAX4484
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—
—
3
1
4
2
5
V
= +1V/V.
MAX4486
PIN
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2
3
1
6
5
7
4
8
Detailed Description
Driving Capacitive Loads
Rail-to-Rail Output Stage
MAX4487
10
13
12
14
11
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—
—
2
3
1
6
5
7
9
8
4
NAME
OUTC
OUTD
OUTA
OUTB
INA+
INB+
INC+
IND+
OUT
INA-
INB-
INC-
IND-
V
IN+
V
IN-
DD
SS
Inverting Amplifier Input
Noninverting Amplifier Input
Amplifier Output
Inverting Amplifier Input (Channel A)
Noninverting Amplifier Input (Channel A)
Amplifier Output (Channel A)
Inverting Amplifier Input (Channel B)
Noninverting Amplifier Input (Channel B)
Amplifier Output (Channel B)
Inverting Amplifier Input (Channel C)
Noninverting Amplifier Input (Channel C)
Amplifier Output (Channel C)
Inverting Amplifier Input (Channel D)
Noninverting Amplifier Input (Channel D)
Amplifier Output (Channel D)
Negative Power-Supply Voltage
Positive Power-Supply Voltage
The MAX4484/MAX4486/MAX4487 operates from a sin-
gle +2.7V to +5.5V power supply. Bypass the power
supply with 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. Use surface-mount
components for best results.
Applications Information
Power Supplies and Layout
FUNCTION
Pin Description