|
Details, datasheet, quote on part number:LM1203B
| |
Datasheet text preview:
LM1203B 100 MHz RGB Video Amplifier System
January 1996
LM1203B 100 MHz RGB Video Amplifier System
General Description
The LM1203B is an improved version of the popular LM1203 wideband video amplifier system The device is intended for high resolution RGB CRT monitors In addition to three matched video amplifiers the LM1203B 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 or providing gain trim capability for white balance The LM1203B also contains a voltage reference for the video inputs The A LM1203B is pin and function compatible with the LM1203
Features
Y Y
Y
Y
Y Y Y
b 3 dB) Three wideband video amplifiers (100 MHz Matched ( g 0 1 dB or 1 2%) attenuators for contrast control Three externally gated comparators for brightness control Provisions for individual gain control (Drive) of each video amplifier Video input voltage reference Low impedance output driver Stable on a single sided board
pplications
Y Y Y
Improvements over LM1203
Y Y Y Y
High resolution RGB CRT monitors Video AGC amplifiers Wideband amplifiers with gain and DC offset controls
100 MHz vs 70 MHz bandwidth VOUT low tr tf Built in power down spot killer
0 15V vs 0 9V 3 7 ns vs 5 ns
Block and Connection Diagrams
28-Lead Molded DIP
TL H 11489 1
Order Number LM1203BN See NS Package Number N28B
C1996 National Semiconductor Corporation TL H 11489 RRD-B30M66 Printed in U S A
Absolute Maximum Ratings (Note 1)
p If Military Aerospace specified devices are required lease contact the National Semiconductor Sales S Office Distributors for availability and specifications upply Voltage (VCC) Pins 1 13 23 28 (Note 3) Peak Video Output Source Current (Any 1A) Pins 15 20 or 25 Voltage at Any Input Pin (VIN) Power Dissipation (PD) (Above 25 C Derate Based on iJA and TJ) Thermal Resistance (iJA) Junction Temperature (TJ) 13 5V 28 mA VCC t VIN t GND ESD Susceptibility (Note 4) Storage Temperature Lead Temperature (Soldering 10 seconds)
b 65
2 0 kV
C to a 150 C
265 C
Operating Ratings (Note 2)
Temperature Range Supply Voltage (VCC)
b 20
C to a 80 C
10 8V s VCC s 13 2V
2 5W 50 C W 150 C
DC Electrical Characteristics See Test Circuit (Figure 2) TA e 25 C VCC1 e VCC2 e 12V S17 21 26 Open V12 e 6V V14 e 0V V15 e 2 0V unless otherwise stated S
ymbol IS V11 Parameter Supply Current Video Input Reference Voltage Conditions VCC1 a VCC2 RL e % (Note 7) Typical (Note 5) 70 28 Any One Amplifier Clamp Comparators On Clamp Comparators Off V14 e 0V V14 e 12V V5 8 or 10 e 0V V5 8 or 10 e 5V V5 8 or 10 e 0V V5 8 or 10 e 5V Between Any Two Amplifiers V15 e 2V Between Any Two Amplifiers V15 e 4V 7 12 16
b1
Limit (Note 6) 95 25 31
Units mA(max) V(min) V(max) mA(max) V(max) V(min) mA(max) mA(max) mA(min) mA(min) V(max) V(min) mV(max) mV(max)
Ib V14l V14h I14l I14h Iclamp a Iclampb VOL VOH DVO(2V) DVO(4V)
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 Video Output Offset Voltage
20 08 20
b5 0
0 07 750
b 750
02 500 500 05 7
g 25
0 15 75 2 2
g 25
http
www national com
2
AC Electrical Characteristics See Test Circuit (Figure 2) TA e 25 C VCC1 e VCC2 e 12V S17 21 26 CS sed V14 e 0V V15 e 4V unless otherwise stated lo
ymbol AV max DVV 5V DAV 2V AV match DAV track 1 DAV track 2 THD f (b3 dB) Parameter Video Amplifier Gain Attenuation Attenuation
5V 2V A
Conditions V12 e 12V VIN e 560 mVPP Ref AV max V12 e 5V Ref AV max V12 e 2V
V max
Typical (Note 5) 65
b8 b 30
g0 3 g0 1 g0 3
Limit (Note 6) 45
Units V V(min) dB dB dB dB dB % MHz
Absolute Gain Match
V12 e 12V (Note 8) V12 e 5V (Notes 8 9) V12 e 2V (Notes 8 9) V12 e 3V VO e 1 VPP V12 e 12V VO e 4 VPP (With 36 pF Peaking Cap from Pins 18 22 and 27 to GND) V12 e 12V VO e 4 VPP (No External Peaking Cap) VO e 4 VPP (With 36 pF Peaking Cap from Pins 18 22 and 27 to GND) VO e 4 VPP (No External Peaking Capacitor) VO e 4 VPP (No External Peaking Capacitor) V12 e 12V (Note 12) V12 e 12V (Notes 10 12)
Gain Change between Amplifiers Gain Change between Amplifiers Video Amplifier Distortion Video Amplifier Bandwidth (Notes 10 11) Video Amplifier Bandwidth (Notes 10 11) Output Rise Fall Time (Note 10) Output Rise Time (Note 10) Output Fall Time (Note 10) Video Amplifier 10 kHz Isolation Video Amplifier 10 MHz Isolation
1 100
f (b3 dB) tr tf
60
MHz
37
ns
tr tf Vsep 10 kHz Vsep 10 MHz
55 60
b 70 b 50
ns ns dB dB
Note 1 Absolute Maximum Ratings indicate limits beyond which damage to the device may occur ote 2 Operating Ratings indicate conditions for which the device is functional but do not guarantee specific performance limits For guaranteed specifications and test conditions see the Electrical Characteristics The guaranteed specifications apply only for the test conditions listed Some performance characteristics N may degrade when the device is not operated under the listed test conditions Note 3 VCC supply pins 1 13 23 28 must be externally wired together to prevent internal damage during VCC power on off cycles Note 4 Human body model 100 pF discharged through a 1 5 kX resistor Note 5 Typical specifications are specified at a 25 C and represent the most likely parametric norm Note 6 Tested limits are guaranteed to National's AOQL (Average Outgoing Quality Level) ote 7 The supply current specified is the quiescent current for VCC1 and VCC2 with RL e % see Figure 2 's test circuit The supply current for VCC2 (pin 23) also Nepends on the output load With video output at 2V DC the additional current through VCC2 is 18 mA for Figure 2 's test circuit d Note 8 Measure gain difference between any two amplifiers VIN e 1 VPP ote 9 DAV track is a measure of the ability of any two amplifiers to track each other and quantifies the matching of the three attenuators It is the difference in gain change between any two amplifiers with the contrast voltage (V12) at either 5V or 2V measured relative to an AV max condition V12 e 12V For example at AV max the three amplifiers' gains might be 17 4 dB 16 9 dB and 16 4 dB and change to 7 3 dB 6 9 dB and 6 5 dB respectively for V12 e 5V This yields the N easured typical g 0 1 dB channel tracking m ote 10 When measuring video amplifier bandwidth or pulse rise and fall times a single sided with ground plane printed circuit board without socket is N recommended Video amplifier 10 MHz isolation test also requires this printed circuit board Note 11 Adjust input frequency from 10 kHz (AV max reference level) to the b 3 dB corner frequency (fb3 dB) ote 12 Measure output levels of the other two undriven amplifiers relative to the driven amplifier to determine channel separation Terminate the undriven amplifier inputs to simulate generator loading Repeat test at fIN e 10 MHz for Vsep e 10 MHz h
3
ttp
www national com
|
|
