375MHz Quad Closed-Loop
Video Buffers, AV = +1 and +2
a)
75Ω CABLE
75Ω
75Ω CABLE
SOURCE:
TEKTRONIX
1910 DIGITAL GENERATOR
MAX497
DUT
75Ω
75Ω CABLE
b)
75Ω
75Ω CABLE
MAX496
DUT
75Ω
150Ω
75Ω
75Ω
MEASUREMENT:
TEKTRONIX VM700
VIDEO MEASUREMENT
SET
Figure 2. Differential Phase and Gain Error Test Circuits: a) MAX497, Gain of +2 Amplifier; b) MAX496 Unity-Gain Amplifier
Power Dissipation
The maximum output current of the MAX496/MAX497 is
limited by the packages maximum allowable power dis-
sipation. The maximum junction temperature should not
exceed +150°C. The power dissipation increases with
load, and this increase can be approximated by the fol-
IN0
lowing:
| | For VOUT > 0V: VCC - VOUT ILOAD
75Ω
OR
| | For VOUT < 0V: VEE - VOUT ILOAD.
These devices can drive 100Ω loads connected to
each of the outputs over the entire rated output swing
and temperature range. When driving 50Ω loads with
each of the four outputs simultaneously, the output
swing must be limited to ±1.25V at TA = +70°C. While
the output is short-circuit protected to 170mA, this does
not necessarily guarantee that, under all conditions, the
maximum junction temperature will not be exceeded.
Do not exceed the derating values given in the
absolute maximum ratings.
MAX496/MAX497
75Ω
75Ω
75Ω
75Ω
OUT1
75Ω
OUT2
75Ω
OUT3
75Ω
OUT4
75Ω
Figure 3. One-to-Four Distribution Amplifier
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