NTE7081
Integrated Circuit RGB Video Amplifier System
28-PIN DIP

Info as pdf-file

Description:

The NTE7081 is a wideband video amplifier system in a 28-Lead DIP type package intended for high resolution RGB color monitor applications. In addition to three matched video amplifiers, the NTE7081 contains three gated differential input vblack level clamp comparators for brightness control and three matched attenuator circuits for contrast control. Each video amplifier contains a gain set or "Drive" node for setting maximum system gain (A_V = 4 to 10) as well as providing trim capability. The NTE7081 also contains a voltage reference for the video inputs.

Features:

• Three Wideband Video Amplifiers (70MHz at -3dB)
• Inherently matched (±0.5dB) Attenuators for Contrast Control
• Three Externally Gated Comparators for Brightness Control
• Provisions for Independent Gain Control (Drive) of each Video Amplifier
• Video Input Voltage Reference
• Low Impedance Output Driver

Absolute Maximum Ratings:

Supply Voltage (Pin1, Pin13, Pin23, Pin28, Note 1, VCC		13.5V
Voltage at Any Input Pin, VIN		VCC >/= VIN >/= GND
Video Output Current, I16, I20, or I28		28mA
Power Dissipation (Note 2), PD		2.5W
Junction Temperature, TJ		+150°C
Operating Temperature Range, TA		0° to +70°C
Storage Temperature Range, Tstg		-65° to +150°C
Thermal Resistance, Junction-to-Ambient, RthJA		50°C/W
Lead Temperature (During Soldering, 10sec.), TL		+265°C
ESD Susceptibility		2kV

Note 1.	VCC supply pins 1, 13, 23, and 28 must be externally wired together to prevent internal damage during VCC power ON/OFF cycles.
Note 2.	Derate above +25°C based on RthJA and TJ.

Electrical Characteristics: (T_A = +25°C, V_CC1 = V_CC2 = 12V unless otherwise specified)

Parameter	Symbol	Test Conditions	Typ	Tested (Note 3)	(Limits) Unit
DC Static Test (S17, S21, S26 Open, V12 = 6V, V14 = 0V, V15 = 2V unless otherwise specified)
Supply Current	IS	VCC1 Only	73	90	mA Max
Video Input Reference Voltage	V11		2.4	2.2	VMIN
			-	2.6	VMAX
Video Input Bias Current	Ib	Any One Amplifier	5	20	µA Max
Clamp Gate Low Input Voltage	V14L	Clamp Comparators ON	1.2	0.8	VMIN
Clamp Gate High Input Voltage	V14H	Clamp Comparators OFF	1.6	2.0	VMAX
Clamp Gate Low Input Current	I14L	V14 = 0V	-0.5	-5.0	µA Max
Clamp Gate High Input Current	I14H	V14 = VCC	0.005	1.0	µA Max
Clamp Cap Charge Current	IClamp(+)	V5, V8, or V10 = 0V	850	-	µA
Clamp Cap Discharge Current	IClamp(-)	V5, V8, or V10 = 5V	-850	-	µA
Video Output Low Voltage	VOL	V5, V8, or V10 = 0V	1.2	-	V
Video Output High Voltage	VOH	V5, V8, or V10 = 5V	8.9	-	V
Video Output Offset Voltage		Between Any Two Amplifiers, V15 = 2V	±0.5	±50	mV Max
		Between Any Two Amplifiers, V15 = 4V	±0.5	±50	mV Max
AC Dynamic Test (S17, S21, S26 Closed, V14 = 0V, V15 = 4V, f = 10kHz unless otherwise specified)
Video Amplifier Gain	AVmax	V12 = 12V, VIN = 560mVP-P	6.6	-	V / V
	AVmid	V12 = 5V, VIN = 560mVP-P	2.0	-	V / V
V12 for AV Low	V12low	VIN = 1VP-P, Note 4	2.0	-	V
Video Gain Match at AVmax		V12 = 12V, Note 5	±0.2	-	dB
Video Gain Match at AVmid		V12 = 5V, Note 5	±0.2	-	dB
Video Gain Match at AVlow		V12 = V12low, Note 4, Note 5	±0.3	-	dB
Video Amplifier Distortion	THD	V12 = 3V, VIN = 1VP-P	0.5	-	%
Video Amplifier Bandwidth	f (-3dB)	V12 = 12V, Note 6, Note 8	70	-	MHz
Video Amplifier, 10kHz Isolation	Vsep10kHz	V12 = 12V, Note 7	-60	-	dB
Video Amplifier, 10kHz Isolation	Vsep10MHz	V12 = 12V, Note 7, Note 8	-40	-	dB

Note 3.	These parameters are guaranteed and 100% tested.
Note 4.	Determine V12 low for -40dB arrenuation of output. Reference AV to max.
Note 5.	Measure gain difference between any two amplifiers. VIN = 1VP-P.
Note 6.	Adjust input frequency, fIN, from 10kHz (AV max ref level) to the -3dB corner frequency (f -3dB). VIN = 560mVP-P.
Note 7.	VIN = 560mVP-P at fIN = 10kHz to any one amplifier. Measure output levels of the other two undriven amplifiers relative to driven amplifier to determine channel separation. Terminate the undriven amplifier inputs to simulate generator loading. Repeat test at fIN = 10MHz for Vsep = 10MHz.
Note 8.	Special test fixture without socket required.

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