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NTE7081 Integrated Circuit RGB Video Amplifier System
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 black 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 (AV = 4 to 10) as well as providing trim capability. The NTE7081 also contains a voltage reference for the video inputs. Features: D Three Wideband Video Amplifiers (70MHz @ -3dB) D Inherently Matched (0.5dB) Attenuators for Contrast Control D Three Externally Gated Comparators for Brightness Control D Provisions for Independent Gain Control (Drive) of each Video Amplifier D Video Input Voltage Reference D 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150C Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +70C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Thermal Resistance, Junction-to-Ambient, RthJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50C/W Lead Temperature (During Soldering, 10sec.) , TL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +265C 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 +25C based on RthJA and TJ.
Electrical Characteristics: (TA = +25C, VCC1 = VCC2 = 12V unless otherwise specified)
Parameter Symbol Test Conditions Typ Tested (Note 3) 90 2.2 2.6 20 0.8 2.0 -5.0 1.0 - - - - 50 50 - - - - - - - - - - (Limits) Unit mA Max VMIN VMAX A Max VMIN VMAX A Max A Max A A V V mV Max mV Max
DC Static Test (S17, S21, S26 Open, V12 = 6V, V14 = 0V, V15 = 2V unless otherwise specified) Supply Current Video Input Reference Voltage IS V11 Ib V14L V14H I14L I14H Iclamp(+) Iclamp(-) VOL VOH VO(2V) VO(4V) Video Amplifier Gain AVmax AVmid V12 for AV Low Video Gain Match at AVmax Video Gain Match at AVmid Video Gain Match at AVlow Video Amplifier Distortion Video Amplifier Bandwidth Video Amplifier, 10kHz Isolation Video Amplifier, 10MHz Isolation V12low AVmax AVmid AVlow THD f (-3dB) Vsep10kHz Any One Amplifier Clamp Comparators ON Clamp Comparators OFF V14 = 0V V14 = VCC V5, V8, or V10 = 0V V5, V8, or V10 = 5V V5, V8, or V10 = 0V V5, V8, or V10 = 5V Between Any Two Amplifiers, V15 = 2V Between Any Two Amplifiers, V15 = 4V V12 = 12V, VIN = 560mVP-P V12 = 5V, VIN = 560mVP-P VIN = 1VP-P, Note 4 V12 = 12V, Note 5 V12 = 5V, Note 5 V12 = V12low, Note 4, Note 5 V12 = 3V, VIN = 1VP-P V12 = 12V, Note 6, Note 8 V12 = 12V, Note 7 VCC1 Only 73 2.4 - Video Input Bias Current Clamp Gate Low Input Voltage Clamp Gate High Input Voltage Clamp Gate Low Input Current Clamp Gate High Input Current Clamp Cap Charge Current Clamp Cap Discharge Current Video Output Low Voltage Video Output High Voltage Video Output Offset Voltage 5 1.2 1.6 -0.5 0.005 850 -850 1.2 8.9 0.5 0.5 6.6 2.0 2.0 0.2 0.2 0.3 0.5 70 -60 -40
AC Dymanic Test (S17, S21, S26 Closed, V14 = 0V, V15 = 4V, f = 10kHz unless otherwise specified) V/V V/V V dB dB dB % MHz dB dB
Vsep10MHz V12 = 12V, Note 7, Note 8
Note Note Note Note
These parameters are guaranteed and 100% tested. Determine V12 low for -40dB attenuation of output. Reference AV to max. Measure gain difference between any two amplifiers. VIN = 1VP-P. 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.
3. 4. 5. 6.
Pin Connection Diagram VCC1 Contrast Cap Contrast Cap R Video Input R Clamp Cap G Video Input GND G Clamp Cap B Video Input B Clamp Cap 1 2 3 4 5 6 7 8 9 10 28 27 26 25 24 23 22 21 20 19 18 17 16 15 VCC1 R Drive R Clamp (-) R Video Output R Clamp (+) VCC2 G Drive G Clamp (-) G Video Output G Clamp (+) B Drive B Clamp (-) B Video Output B Clamp (+)
VINREF 11 Contrast 12 VCC1 13 Clamp Gate 14
14
1
15
28
1.469 (37.32) Max .250 (6.35)
.540 (13.7)
.100 (2.54) 1.300 (33.02)
.122 (3.1) Min
.600 (15.24)

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