MAX4090 Maxim, MAX4090 Datasheet - Page 10

• Manufacturer Part Number: MAX4090
• Description: The MAX4090 3V/5V, 6dB video buffer with sync-tip clamp, and low-power shutdown mode is available in tiny SOT23 and SC70 packages
• Manufacturer: Maxim

3V/5V, 6dB Video Buffer with Sync-Tip Clamp
and 150nA Shutdown Current
Figure 5. Frequency Response for R1 = R2 = 150 Ω
Figure 6. Sag Correction Configuration
10
CURRENT
______________________________________________________________________________________
VIDEO
DAC
-10
-20
-30
-40
-50
-60
0
0.1
150Ω
R1
FREQUENCY RESPONSE
FREQUENCY (MHz)
1
3-POLE RECONSTRUCTION LPF
C1
120pF
4.7μH
10
6.8pF
L1
C3
120pF
C2
100
R2
150Ω
49.9Ω
R
V
IS
CC
The MAX4090 operates from single 2.7V to 5.5V sup-
ply. Bypass the supply with a 0.1µF capacitor as close
to the pin as possible. Maxim recommends using
microstrip and stripline techniques to obtain full band-
width. To ensure that the PC board does not degrade
the device’s performance, design it for a frequency
greater than 1GHz. Pay careful attention to inputs and
outputs to avoid large parasitic capacitance. Whether
or not you use a constant-impedance board, observe
the following design guidelines:
• Do not use wire-wrap boards; they are too inductive.
• Do not use IC sockets; they increase parasitic
• Use surface-mount instead of through-hole compo-
• Use a PC board with at least two layers; it should be
• Keep signal lines as short and as straight as possible.
capacitance and inductance.
nents for better, high-frequency performance.
as free from voids as possible.
Do not make 90° turns; round all corners.
0.1μF
C4
Layout and Power-Supply Bypassing
SHDN
IN
MAX4090
GND
V
CC
OUT
FB
22μF
22μF
C5
C6
C7
1μF
75Ω
R3
V
CC
V
OUT