Calogic LLC CVA1775N Datasheet
CORPORATION
CRT Driver
+ DC Bias Amplifier
Preliminary Data Sheet
CVA1775N
FEATURES
•• Little or No Heat Sink Required
•• Ease of Use
•• Rise Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <8ns
•• Fall Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . <7ns
APPLICATIONS
•• 14", 15", 17" Monitors wi th 70KHz Scan ning Fr eque ncy
SCHEMA T IC, TEST CIRCUIT
GND-CUTOFF
CUTOFF-GAIN (L)
CUTOFF-GAIN (H)
IN-CUTOFF
V (VIDEO)
IN
R
GAIN
100
47
27pF
W
W
2K
2K
33K
100
33
47
.010pF
1
W
2
W
3
W
4
W
5
6
W
7
W
8
CVA1775N
DESCRIPTION
The CVA1775N includes a cascode CRT driver and a DC bias
cutoff amplifier. All of the active components are inside the
CVA1775N. Only the passive components and protection diodes
are needed t o drive a CRT tube. The CVA1775N can easily
drive 70KHz monitors. With the unique feature of DC bias
circuitry the print ed circuit board will shrink as EMI performance
will be improved.
ORDERING INFORMATION
Part Package Temperature
o
CVA1775N 16-PDIP 0
16
BIASED-CUTOFF
W
33K
BIASED-CUTOFF
15
14
13
12
10mF .01mF
11
10
9
1
m
F
W
15
W
15
1.5K
W
R
LOAD
1M
C to +1 1 0oC
V TO CRT
OUT
V (DRIVER)
OUT
V (80V)
CC
V (12V)
BIAS
1U-21
CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-6 56-290 0, FAX: 510-651-3025
CVA1775N
ABSOLUTE MAXIMUM RATINGS
Supply Vo ltage (Driver Pin #12) . . . . . . . . . . . . . . . . . . . 100V
Supply Voltage (cutoff ) . . . . . . . . . . . . . . . . . . . . . . . . . . 250V
Storage Tempera tu re. . . . . . . . . . . . . . . . . . . -25
o
C to +125oC
CORPORATION
Junct i on Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 175
Operating Temperature ( Cas e) . . . . . . . . . . . . . 0
o
C to +1 1 0oC
Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300
o
C
o
C
CRT DRIVER DC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 12pF , V
= 12V, VIN = 2.7V, RL = 1500Ω, T
BIAS
CASE
= +25oC.
SYMBOL CHARACTERISTICS MIN TYP MAX UNITS
I
cc
V
OUT DC
A
(Driver) Voltage Gain 13 15 V
v
CRT DRIVER AC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 12pF, V
Supply Current 20 26 mA
Output DC Level 44 50 56 V
= 12V, VIN = 2.7V, RL = 1500Ω, T
BIAS
CASE
SYMBOL CHARACTERISTICS MIN TYP MAX UNITS
T
r
T
f
L
e
Rise Time 7.5 9 ns
Fall Time 7.5 9 ns
Linearity 5%
OS Overshoot 3 %
BIAS AMPLIFIER DC ELECTRICA L CHARACTERI STICS Supply Voltage = 150V , VB = 12Vsee test circuit .
SYMBOL CHARACTERISTICS TYP MIN MAX UNITS CONDITIONS
I
CC
V
OUT(LOW)
V
OUT(HIGH)
Gain Voltage Gain 13.8 12 16 V/V ∆V
∆ Gain Gain Match 0.5 1 dB Note 1
Supply Current 5 5.5 mA VIN = 5V
Output Voltage666070VV
IN
= 5V
Output Voltag e 121 118 126 V VIN = 1V
OUT
= +25oC.
/∆V
IN
Note 1. Calculate from voltage gain of each channe l.
Note 2: V
at VIN = 5V, ∆T = 25oC 100oC
OUT
CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-6 56-290 0, FAX: 510-651-3025
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