LM2202N National Semiconductor, LM2202N Datasheet - Page 4

• Manufacturer Part Number: LM2202N
• Description: IC VIDEO AMP SYSTEM 20-DIP
• Manufacturer: National Semiconductor

Specifications of LM2202N

• Applications: General Purpose
• Number Of Circuits: 1
• -3db Bandwidth: 230MHz
• Current - Supply: 48mA
• Current - Output / Channel: 28mA
• Voltage - Supply, Single/dual (±): 8 V ~ 13.2 V
• Mounting Type: Through Hole
• Package / Case: 20-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *LM2202N

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Typical Performance Characteristics
Quiescent Supply Current
vs Supply Voltage
Contrast vs Frequency
Attenuation vs
Contrast Voltage
Circuit Description
Figure 2 shows a block diagram of the LM2202 video ampli-
fier along with contrast and brightness (black level) control.
Contrast control is a DC-operated attenuator which varies
the AC gain of the amplifier. Signal attenuation (contrast) is
achieved by varying the base drive to a differential pair and
thereby unbalancing the current through the differential pair.
As shown in Figure 2 , pin 20 provides a 5.3V bias voltage for
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(V
Attenuation vs Drive Voltage
Drive vs Frequency
4
CC
the positive input of the attenuator (pin 1). Pin 3 provides a
control voltage for the negative input (pin 2) of the attenuator.
The voltage at pin 3 varies as the voltage at the contrast con-
trol input (pin 8) varies thus providing signal attenuation. The
gain is maximum (0 dB attenuation) if the voltage at pin 8 is
4V and is minimum (maximum attenuation) if the voltage at
pin 8 is 0V. The 0V to 4V DC-operated drive control at pin 9
= 12V, T
A
= 25˚C unless otherwise specified)
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