MAX4353 Maxim, MAX4353 Datasheet - Page 12

• Manufacturer Part Number: MAX4353
• Description: The MAX4452/MAX4352 single, MAX4453/MAX4353 dual, and MAX4454/MAX4354 quad amplifiers combine high-speed performance with ultra-low power consumption
• Manufacturer: Maxim

Low-Cost, +3V/+5V, 620µA, 200MHz,
Single-Supply Op Amps with Rail-to-Rail Outputs
Figure 3a. Noninverting Gain Configuration
The low distortion and high bandwidth of the
MAX4452/MAX4453/MAX4454
MAX4353/MAX4354 make them ideal for use in active
filter circuits. Figure 4 is a 15MHz lowpass multiple
feedback active filter using the MAX4452.
Input buffer amplifiers can be a source of significant
errors in high-speed ADC applications. The input buffer
is usually required to rapidly charge and discharge the
ADC’s input, which is often capacitive. See Output
Capacitive Loading and Stability. In addition, since a
high-speed ADC’s input impedance often changes very
rapidly during the conversion cycle, measurement
accuracy must be maintained using an amplifier with
very low output impedance at high frequencies. The
combination of high speed, fast slew rate, low noise,
and a low and stable distortion over load makes the
MAX4452/MAX4453/MAX4454/MAX4352/MAX4353/
MAX4354 ideally suited for use as buffer amplifiers in
high-speed ADC applications.
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IN
R
S
Gain
ƒ =
Q
R
0
G
=
=
2p
C1 C2 R2 R3
1
R1
1
-
×
R1
R2
+
R2
R2
C2
1
×
×
V
OUT
+
R
R3 C1 C2
F
R3
= [1+ (R
1
×
1
×
ADC Input Buffer
F
and
/ R
×
Active Filters
G
)] V
IN
MAX4352/
V
OUT
R
O
These amplifiers operate from a single +2.7V to +5.25V
power supply. Bypass V
capacitor as close to the pin as possible.
Maxim recommends using microstrip and stripline tech-
niques to obtain full bandwidth. Design the PC board
for a frequency greater than 1GHz to prevent amplifier
performance degradation due to board parasitics.
Avoid large parasitic capacitance at inputs and out-
puts. Whether or not a constant-impedance board is
used, observe the following guidelines:
• Do not use wirewrap boards due to their high induc-
• Do not use IC sockets because of the increased
Figure 4. Multiple-Feedback Lowpass Filter
Figure 3b. Inverting Gain Configuration
V
IN
tance.
parasitic capacitance and inductance.
IN
150Ω
R1
Layout and Power-Supply Bypassing
R
G
R2
150Ω
C1
100pF
R
S
511Ω
R3
V
OUT
R
CC
C2
15pF
F
= (R
to ground with a 0.1µF
F
/ R
10kΩ
10kΩ
G
) V
IN
+5.0V
V
OUT
R
O
V
OUT