Datasheet CVA2401T Datasheet (Calogic LLC)

CORPORATION

= 1000

Ω

R

1

1N-23

GND

TAB

7

9

V

CC

11,10,8

50

Ω

V

B

V

O

1,3,5

V

IN

2,4,6

Gain/Peaking

Control

Low Cost

Triple CRT Driver

Preliminary Data Sheet

CVA2401T

FEATURES

•• Rise/Fall Ti me. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4.0ns

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

•• Suppl y Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100V

APPLICA TI ONS

•• CRT driver for up to 89kHz monitor s with resolutio n up

to 12 80 x 1 02 4.

•• Excellent Gray Scale Linearity

•• Emitter Peaki n g Option

•• Adjustabl e Gain

CONNECTION DIAGRAM

11

TOP VIEW

T11A PACKAGE

10
9
8
7
6
5
4
3
2
1

GND = TAB

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 CVA2401T contains three wideband amplifiers, designed
specifically to drive a CRT. It features no crossover distortion for
excellent gray scale linearity, external emitter peaking to
maximize the high frequency gain at cross hatch pattern and
adjustable gai n for ease of use This device can drive monitors
with resolutions of 1280 x 1024 (non-interlaced) with pixel
frequency of 210MHz.

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

CVA2401T T11A 0

3

2

1

C to +1 1 0oC

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

CVA2401T

GND

TAB

1Q-35

V

IN

V

BIAS

C1 = 0.01mF
C2 = 100

m

F

C3 = 0.1

m

F

C7 = 120pF

D1, D2 = FHD400

R1 = 68

W

R2 = 20

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)

CVA2401T

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 38 43 48 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

= 50V

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 4 5.0 ns
Fall Time 45.0ns
Linearity 6%

FIGURE 1. TEST CIRCUIT

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

1Q-36

GND
TAB

V

BIAS

C1 = 0.01mF
C2 = 100

m

F

C3 = 0.1

m

F

C4 = 100

m

F

C5 = 2.2

m

F

C7 = 40 - 120pf

D1, D2 = FHD400
L = 330 - 390nH

R1 = 68

W

R2 = 20

W

R3 = 47

W

R4 = 47(1/2W)

W

R7 = 33

W

R8 = 39

W

R10 = 680

W

R3

R4

C4C3

C2C1

D2

D1

V 9

CC

7

11,10,8

V

OUT

C5

SPARK
GAP

CVA2401T

R5

L

V

IN

R2

R1

VIDEO
INPUT

1,3,5

C7

V

PG

2,4,6

DC BIAS

INPUT VOLTAGE

OUTPUT VOLTAGE (V)

0

60

90

357

POWER DISSIPATION (W)

1462

50

80

40

70

30
20
10

3

4

2

1

5

100

110

6

1S-36

120

VOLTAGE

POWER

CORPORATION

FIGURE 2. APPLICATION CIRCUI T

CVA2401T

APPLICATION INFORMATION

The CVA2401T is a high voltage triple CRT driver suitable for
VGA, Super VGA, IBM

®

8514, 1280 x 1024 and 1024 x 768
non-interlaced display applic ations. The CVA2401T 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 3.

current increases as the input signal increases and

Since this is a cl ass A input stage, power supply

consequently power dissipation also increase s.
The CVA2401T cann ot be used withou t heat sinking.

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 13.2W
total. The CVA2401T case temperature must be maintained
below +100
temperatur e is + 5 0
resistance equa l to or less than:

R

th

The CV A 24 01T maximum load is 600 Ω to ground or V
The output of CV A2401T i s not shor t ci rc uit pr oof . Any r e sist ance

+

or Ground should be > 600Ω.

to V

o

C. If the maximum expected ambient

(100 − 50

=

13.2W

o

C, then a heat sink is needed wit h ther m a l

o

C)

= 3.8oC/W

Figure 3

+

.

FIGURE 3. CVA2401 T DC Chara cteristi cs

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

CVA2401T

TYPICAL CHARACTERISTIC S

50
45
40
35
30
25

OUT P-P

20

V (V )

15
10

CORPORATION

V vs FREQUENCY vs

OUT

V

OUT

I

CC

5
0

20 30 50 70 10080 90110 40

FREQUENCY (MHz)

I

CC

90
80
70

I (mA)

CC

60
50
30
40
20
10

0

110

1S-37

5.25V

10V/DIV

VvsV

80

70

60

50

40

OUT

V (V)

30

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

OUT IN

V

OUT

I

CC

V (VOLTS)

IN

vs I

CC

CROSS HATCH

WHITE BACKGROUND

4.25V

10V/DIV

80

70

60

50

I (mA)

CC

40

30

20

10

0

1S-38

CROSS HATCH

BLACK BACKGROUND

-4.75V

2.4ns 202.4ns
20ns/DIV

1V-03

-4.75V

-40ns 160ns
20ns/DIV

1V-04

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

CORPORATION

TYPICAL CHARACTERISTICS (cont i nued)

CVA2401T

30V

8V/DIV

10V

90V

8V/DIV

RISE TIME

WITH PEAKING

INDUCTOR & CAPACITOR

10ns/DIV

RISE TIME

WITH PEAKING

CAPACITOR (NO INDUCTOR)

1D-02

30V

8V/DIV

10V

90V

8V/DIV

FALL TIME

WITH PEAKING

INDUCTOR & CAPACITOR

10ns/DIV

FALL TIME

WITH PEAKING

CAPACITOR (NO INDUCTOR)

1D-03

10V

10ns/DIV

1D-04

RISE TIME

NO PEAKING

120.5V

10V/DIV

2.5V

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.

INDUCTOR OR CAPACITOR

10ns/DIV

1D-06

10V

120.5V

10V/DIV

2.5V

10ns/DIV

FALL TIME

NO PEAKING

INDUCTOR OR CAPACITOR

10ns/DIV

1D-05

1D-07

CALOGIC CORPORATION, 237 Whitney Place, Frem ont, California 94539, Telephone: [phone], FAX: [phone]