OPA361AIDCKT Datasheet, PDF (9/17 Pages) Texas Instruments – 3V VIDEO AMPLIFIER with Internal Gain and Filter in SC70

OPA361
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Video Performance
The color bar signal in Figure 3 shows excellent amplitude
characteristics and no attenuation of colors with respect to
the luminance signal.
∆: 2.02V
@: 30.0mV
SBOS334A − SEPTEMBER 2005 − REVISED JANUARY 2006
The multiburst test patterns have different sine-wave burst
sections with the following frequencies: 0.5MHz, 1MHz,
2MHz, 4MHz, 4.8MHz and 5.8MHz with 420mV_PP. There
is no visible attenuation even at the highest frequencies,
which indicates a very flat frequency response of the
OPA361. As shown in Figure 5 and Figure 6, the top line
illustrates the full signal and the bottom line is a more
detailed view of the last three sine wave bursts.
Figure 3. 100/75 Color Bar Signal at Output of
OPA361
The CCIR330/5 test pattern requires one of the greatest
dynamic ranges, and therefore tests the OPA361 output
voltage swing capability. The scope plot shown in Figure 4
has been taken with a 2.8V supply and shows no clipping
on the top side of the signal.
∆: 2.30V
@: 2.31mV
Figure 5. Multiburst Signal (CCIR 18/1) Shows
Very Flat Frequency Response
The CCIR17 test pattern contains a 2T and a 20T pulse,
as shown in Figure 6. The 2T pulse is used to check for
pulse distortion and reflection, and the 20T pulse is used
to check for amplitude and group delay between
chrominance and luminance. Neither pulse exhibits any
distortion or group delay artifacts.
Figure 4. CCIR330/5:
No Clipping, Even On 2.8V Supply
Figure 6. CCIR 17 2T and 20T Pulses Show No
Visible Distortion
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