Datasheet CVA2400A Datasheet (Calogic LLC)

CORPORATION

1Q-42

GND

TAB

7

9

V

CC

11,10,8

V

BIAS

V

OUT

1,3,5

V

IN

2,4,6

Gain/Peaking

Control

= 1200

W

R

1

50

W

Low Cost

Triple CRT Driver

Preliminary Data Sheet

CVA2400A

FEATURES

•• Rise/Fall Ti me. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0ns

•• Swing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65V

•• Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90V

APPLICATIONS

•• CRT driver for up to 76kHz Mo nito rs

•• Excellent Gray Scale Linearity

•• Emitter Peaki n g Option

•• Adjustabl e Gain

CONNECTION DIAGRAM AND SIM PLIFI ED SCHEM ATIC

11
10
9
8
7
6
5
4
3
2
1

GND = TAB

TOP VIEW

T11A PACKAGE

1

V

OUT

2

V

OUT

V

CC

3

V

OUT

V

BIAS

Gain/Peaking
Control

3

V

IN

Gain/Peaking
Control

2

V

IN

Gain/Peaking
Control

V

1

IN

P-P

1N-22

DESCRIPTION

The CVA2400A contains three wide band triple amplifiers,
specifically designed to drive a CRT. It features no crossover
distortion for excellent gray scale linearity, external emitter
peaking to maximize the high frequency gai n at the cross hatch
pattern and an adjustable gain for ease of use. This device can
drive monitors with resolutions of 1280 X 1024 (interlaced) with
pixel frequencies of 176MHz.

The part is housed in the industry standard 11-lead TO-220
molded power pack age. The heat sink is gr ounded.

ORDERING INFORMATION
Part Package Temperature

o

CVA2400A T11A 0

3

2

1

C to +1 1 0oC

CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone] , FAX: [phone]

CVA2400A

GND

TAB

1Q-43

V

IN

V

BIAS

C1 = 0.01mF
C2 = 100

m

F

C3 = 0.1

m

F

C7 = 40pF (TYP)

D1, D2 = FHD400

R1 = 82

W

R2 = 15

W

C4 = 100mF
C6 = 8pF

R2

R1

C6

C4C3

C2C1

D2

D1

VIDEO
INPUT

V 9

CC

1,3,5

7

11,10,8

V

OUT

C7

V

PG

2,4,6

TEKTRONIX
FET PROBE
MODEL 620 1
(CAP. 1.5pF)

CVA2400A

ABSOLUTE MAXIMUM RATINGS

Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100V

Storage Tempera tu re. . . . . . . . . . . . . . . . . . . -25

Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +175

o

C to +125oC

o

CORPORATION

Case Temperatur e. . . . . . . . . . . . . . . . . . . . . . . 0

Lead Temperat ure . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300

o

C to +1 1 0oC

o

C

C

DC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 8pF, DC

INPUT BIAS

= 12V, VIN = 3.2V, V

OUT

= 50V

p-p

. T

CASE

= +25oC.

See Figure 1.

SYMBOL CHARACTERISTICS MIN TYP MAX UNITS

I

cc

V

OUT DC

A

v

R

IN

AC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 8pF, DC

Supply Current 30 35 40 mA
Output DC Level 40 45 50 V
Voltage Gain 14 14.4 15 V
Input Impedance 10,000 12,000 20,000 Ω
Gain Matc h ing 0.2 0.7 dB

INPUT BIAS

= 12V, VIN = 3.2V, V

OUT

= 45V

p-p

. T

CASE

= +25oC.

See Figure 1.

SYMBOL CHARACTERISTICS MIN TYP MAX UNITS

T

r

T

f

L

e

OS Overshoot 3 7 %

Rise Time 6 7 ns
Fall Time 4.5 5.5 ns
Linearity 6%

FIGURE 1. TEST CIRCUIT

CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone] , FAX: [phone]

INPUT VOLTAGE

OUTPUT VOLTAGE (V)

0

60

90

357

POWER DISSIPATION (W)

1462

50

80

40

70

30

20

10

3

4

2

1

5100

110

1Q-45

VOLTAGE

POWER

CORPORATION

FIGURE 2. APPLICATION CIRCUI T

V

BIAS

R3

C2C1

VIDEO
INPUT

C7

R2

V 9

CC

7

V

IN

5,3,1

CVA2400A

V

PG

6,4,2

R1

GND
TAB

D1

V

OUT

11,10,8

D2

C5

DC BIAS

CVA2400A

C4C3

L

R4

R5

SPARK
GAP

R1 = 82
R2 = 15
R3 = 47
R4 = 47(1/2W)
R5 = 820

APPLICATION INFORMATION

The CVA2400A is a high voltage triple CRT driver suitable for
VGA, Super VGA, IBM

®

8514, and 1280 x 1024

W
W

W

W

FIGURE 3. CVA2400A DC Ch ara ct eristi cs

C1 = 0.01mF
C2 = 100
C3 = 0.1
C4 = 100

W

C5 = 2.2
C7 = 40 - 120pf

F

F

F

F

D1, D2 = FHD400
L = 150 - 330nH

1Q-44

m

m

m

m

non-interlaced display applic ations. The CVA2400A features
80V operation. The part is housed in the industry standa rd 11
lead TO-220 molded power package. The heat sink is
grounded for ease of manufact uring and RFI shield ing.

Thermal Considerati ons

The transfer characteristics of the amplifier are shown in

Figure 2.

Since this is a cl ass A input stage, power supply
current increases as the input signal increases and
consequently power dissipation also increase s.

The CVA240 0 A cann ot be used withou t heat sinking.

Figure 3

shows the power dissipated in each channel over the
operating voltage range of the device. Under white screen
conditions, i.e.: 25V output, dissipation increases to 11W total.
The CVA2400A case temperature must be maintained below

o

C. If the maximum expected ambient temperature is

+100

o

C, then a heat sink is needed with thermal resistance

+50
equal to or less than:

R

th

(100 − 50

=

11W

o

C)

= 4.5

The CV A24 00A maximum load is 600Ω to ground or V
The output of CVA2400A is not short circuit proof. Any

resistance to V

+

or Ground should be > 60 0Ω.

o

C/W

+

.

CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone] , FAX: [phone]

CVA2400A

TYPICAL CHARACTERISTIC S

CORPORATION

OUT P-P

V (V )

50
45
40
35
30
25
20
15
10

80

70

60

V vs FREQUENCY vs

OUT

V

OUT

I

CC

5
0

20 30 50 70 10080 90110 40

FREQUENCY (MHz)

V

OUT

V

OUT

vs V vs I

I

CC

90
80
70

I (mA)

CC

60
50
40
30
20
10

0

1Q-48

CCIN

80

70

60

50

40

OUT

V (V)

30

I

20

10

0

0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 6.05.5

CC

V (VOLTS)

IN

1Q-47

50

40

30

20

10

0

CC

I (mA)

CALOGIC CORPOR ATION, 237 Whitney Place, Fremont, California 94539, Telephone: [phone] , FAX: [phone]

1S-34

20ns/DIV

10V/DIV

CROSS HATCH

BLACK BACKGROUND

-47.6ns 152.4ns

-2.75V

7.25V

1S-33

20ns/DIV

10V/DIV

FALL TIME

-40ns 160ns

-3.75V

6.25V

CORPORATION

TYPICAL CHARACTERISTICS (cont i nued)

CVA2400A

6.25V

10V/DIV

-3.75V

-40ns 160ns
20ns/DIV

CROSS HATCH

WHITE BACKGROUND

7.25V

RISE TIME

1S-32

10V/DIV

-2.75V

2.4ns 202.4ns

Inform at ion furni shed by Calogic is believed to be accurate and reliable. Howe ver, no responsibility is assum ed for its use: nor for any in fring eme nt of pate nts or other
rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Calogic.

CALOGIC CORPORATION, 237 Whitney Plac e, Fre m ont, California 94539, Telephone: [phone], FAX: [phone]

20ns/DIV

1S-35