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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +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: (TA = +25°C, VCC1 = VCC2 = 12V unless otherwise specified) Parameter Symbol Test Conditions Tested (Note 3) (Limits) Unit 73 90 mA Max 2.4 2.2 VMIN – 2.6 VMAX 5 20 µA Max Typ DC Static Test (S17, S21, S26 Open, V12 = 6V, V14 = 0V, V15 = 2V unless otherwise specified) Supply Current Video Input Reference Voltage Video Input Bias Current IS VCC1 Only V11 Ib Any One Amplifier 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 ∆VO(2V) Between Any Two Amplifiers, V15 = 2V ±0.5 ±50 mV Max ∆VO(4V) Between Any Two Amplifiers, V15 = 4V ±0.5 ±50 mV Max Video Output Offset Voltage AC Dymanic 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 ∆AVmax V12 = 12V, Note 5 ±0.2 – dB Video Gain Match at AVmid ∆AVmid V12 = 5V, Note 5 ±0.2 – dB Video Gain Match at AVlow ∆AVlow V12 = V12low, Note 4, Note 5 ±0.3 – dB V12 = 3V, VIN = 1VP–P 0.5 – % V12 = 12V, Note 6, Note 8 70 – MHz V12 = 12V, Note 7 –60 – dB –40 – dB Video Amplifier Distortion THD Video Amplifier Bandwidth f (–3dB) Video Amplifier, 10kHz Isolation Vsep10kHz Video Amplifier, 10MHz Isolation Vsep10MHz V12 = 12V, Note 7, Note 8 Note Note Note Note 3. 4. 5. 6. 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. Pin Connection Diagram VCC1 1 28 VCC1 Contrast Cap 2 27 R Drive Contrast Cap 3 26 R Clamp (–) R Video Input 4 25 R Video Output R Clamp Cap 5 24 R Clamp (+) G Video Input 6 23 VCC2 GND 7 22 G Drive G Clamp Cap 8 21 G Clamp (–) B Video Input 9 20 G Video Output B Clamp Cap 10 19 G Clamp (+) VINREF 11 18 B Drive Contrast 12 17 B Clamp (–) VCC1 13 16 B Video Output Clamp Gate 14 15 B Clamp (+) 14 1 15 28 1.469 (37.32) Max .540 (13.7) .250 (6.35) .100 (2.54) 1.300 (33.02) .122 (3.1) Min .600 (15.24)