NSC LM2469TA Datasheet
LM2469
Monolothic Triple 9nS High Gain CRT Driver
LM2469 Monolothic Triple 9nS High Gain CRT Driver
October 2000
General Description
The LM2469 is an integrated high voltage CRT driver circuit
designed for use in color monitor applications. The IC contains three high input impedance wide band amplifiers,
which directly drive the RGB cathodes of a CRT. Each
channel has its gain internally set to -20 and can drive CRT
capacitive loads as well as resistive loads present in other
applications, limitedonly by the package’s power dissipation.
The IC is packaged in an industry standard 9 lead TO-220
molded plastic package.
n 0V to 3.75V input range
n Stable with 0-20pF capacitive loads and inductive
peaking networks
n Maintains standard LM243X Family Pinout which is
designed for easy PCB layout
n Convenient TO-220 staggered 9 lead package style
Applications
n Up to 1024 X 768 at 70Hz
n Pixel clock frequencies up to 75MHz
n Monitors using video blanking
Features
n Higher gain to match LM126X CMOS preamplifiers
Schematic Diagram Connection Diagram
DS200006-2
Note: Tab is at GND.
DS200006-1
FIGURE 1. Simplified Schematic Diagram (One
Channel)
© 2000 National Semiconductor Corporation DS200006 www.national.com
FIGURE 2. Top View
Order Number: LM2469TA
NS package Number: TA09A
Absolute Maximum Ratings (Notes 1, 3)
If Military/Aerospace specified devices are required,
LM2469
please contactthe National Semiconductor Sales Office/
Distributors for availability and specifications.
Supply Voltage, V
Bias Voltage, V
Input Voltage, V
Storage Temperature Range, T
CC
BB
IN
STG
-65˚C to +150˚C
+90V
+16V
0V to 4.5V
Limits of Operating Ranges (Note 2)
V
CC
V
BB
V
IN
V
OUT
Case Temperature -20˚C to +100˚C
Do not operate the part without a heat sink.
+60V to +85V
+8V to 15V
0V to +3.75V
+15V to +75V
Lead Temperature (Soldering,
<
10sec.) 300˚C
ESD Tolerance, Human Body Model 2kV
Electrical Characteristics
(See Figure 3 for Test Circuit)
Unless otherwise noted: VCC= +80V, VBB= +12V, CL= 8pF, TC= 50˚C.
DC Tests: V
AC Tests: Output = 40VPP(25V - 65V) at 1MHz
Symbol Spec Parameter Conditions Min Typ Max Units
I
CC
I
BB
V
OUT
A
V
∆A
V
LE Linearity Error Note 4, 5, No AC Input Signal 5 %
t
R
t
F
OS Overshoot Note 6 5 %
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur.
Note 2: Operating Ratings indicate conditions for which the device is functional, but do not guarantee specific performance limits. For guaranteed specifications and
the test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some performance characteristics may
change when the device is not operated under the listed test conditions.
Note 3: All voltages are measured with respect to GND, unless otherwise specified.
Note 4: Calculated value from Voltage Gain test on each channel.
Note 5: Linearity Error is the variation in DC Gain from V
Note 6: Input from signal generator: t
= +2.25VDC
IN
Supply Current Per Channel, No Input Signal, No
Output Load
812mA
Bias Current All three Channels 15 25 mA
DC Output Voltage No AC Input Signal, VIN= 1.25V 62 65 68 V
DC Voltage Gain No AC Input Signal -18 -20 -22
Gain Matching Note 4, No AC Input Signal 1.0 dB
Rise Time Note 6, 10% to 90% 9.5 nS
Fall Time Note 6, 90% to 10% 10.5 nS
= 1.0 volts to Vin= 3.5 volts.
in
R,tF
<
1nS.
DC
AC Test Circuit
FIGURE 3. Test Circuit (One Channel)
www.national.com 2
DS200006-3
Typical Performance Characteristics
(VCC= +80VDC,VBB= +12VDC,CL= +8pF, V
Figure 9: V
out
vs V
in
= 40VPP(25-65V), Test Circuit - Figure 3 unless otherwise specified.
OUT
DS200006-4
LM2469
DS200006-7
Figure 10: Power Dissipation vs Frequency
DS200006-5
Figure 11: Speed vs Temperature
DS200006-6
Figure 13: LM2469 Pulse Response
DS200006-8
Figure 12: Speed vs Offset
DS200006-9
Figure 14: Speed vs Load Capacitance
www.national.com3
Loading...