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| Low Cost Triple CRT Driver CORPORATION Preliminary Data Sheet CVA2400A FEATURES 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 gain 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 package. The heat sink is grounded. ORDERING INFORMATION Part CVA2400A Package T11A Temperature 0oC to +110oC * * * * * * * Rise/Fall Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.0ns Swing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65VP-P Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 90V APPLICATIONS CRT driver for up to 76kHz Monitors Excellent Gray Scale Linearity Emitter Peaking Option Adjustable Gain CONNECTION DIAGRAM AND SIMPLIFIED SCHEMATIC 11 10 9 8 7 6 5 4 3 2 1 VCC 9 VOUT 1 VOUT 2 R1 = 12009 VCC VOUT 3 VBIAS Gain/Peaking 3 Control VIN 3 Gain/Peaking 2 Control VIN 2 Gain/Peaking 1 Control VIN 1 GND = TAB VOUT 11,10,8 VBIAS 7 VIN 1,3,5 509 TOP VIEW T11A PACKAGE 1N-22 2,4,6 Gain/Peaking Control GND TAB 1Q-42 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2400A CORPORATION ABSOLUTE MAXIMUM RATINGS Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100V Storage Temperature . . . . . . . . . . . . . . . . . . . -25oC to +125oC Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . +175oC Case Temperature . . . . . . . . . . . . . . . . . . . . . . . 0oC to +110oC Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . +300oC DC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 8pF, DCINPUT BIAS = 12V, VIN = 3.2V, VOUT = 50Vp-p. TCASE = +25oC. See Figure 1. SYMBOL Icc VOUT DC Av RIN Supply Current Output DC Level Voltage Gain Input Impedance Gain Matching CHARACTERISTICS MIN 30 40 14 10,000 TYP 35 45 14.4 12,000 0.2 MAX 40 50 15 20,000 0.7 UNITS mA V V dB AC ELECTRICAL CHARACTERISTICS Vs = 80V, CL = 8pF, DCINPUT BIAS = 12V, VIN = 3.2V, VOUT = 45Vp-p. TCASE = +25oC. See Figure 1. SYMBOL Tr Tf Le OS Rise Time Fall Time Linearity Overshoot CHARACTERISTICS MIN TYP 6 4.5 6 3 7 MAX 7 5.5 UNITS ns ns % % FIGURE 1. TEST CIRCUIT VCC 9 C3 VBIAS C1 C2 D1 7 CVA2400A VIN VOUT 11,10,8 D2 C4 C6 VIDEO INPUT R2 C7 1,3,5 VP G 2,4,6 GND TAB TEKTRONIX FET PROBE MODEL 6201 (CAP. 1.5pF) R1 C1 = 0.01mF C2 = 100mF C3 = 0.1mF C7 = 40pF (TYP) C4 = 100mF C6 = 8pF R1 = 829 R2 = 159 D1, D2 = FHD400 1Q-43 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2400A CORPORATION FIGURE 2. APPLICATION CIRCUIT VCC 9 C3 VBIAS C1 R3 7 C2 CVA2400A D1 VOUT 11,10,8 C5 C4 L VIN VIDEO INPUT R2 C7 R4 R5 SPARK GAP 5,3,1 VPG 6,4,2 GND TAB D2 DC BIAS R1 R1 = 82W R2 = 15W R3 = 47W R4 = 47(1/2W)W R5 = 820W C1 = 0.01mF C2 = 100mF C3 = 0.1mF C4 = 100mF C5 = 2.2mF C7 = 40 - 120pf D1, D2 = FHD400 L = 150 - 330nH 1Q-44 APPLICATION INFORMATION The CVA2400A is a high voltage triple CRT driver suitable for VGA, Super VGA, IBM(R) 8514, and 1280 x 1024 non-interlaced display applications. The CVA2400A features 80V operation. The part is housed in the industry standard 11 lead TO-220 molded power package. The heat sink is grounded for ease of manufacturing and RFI shielding. Thermal Considerations The transfer characteristics of the amplifier are shown in Figure 2. Since this is a class A input stage, power supply current increases as the input signal increases and consequently power dissipation also increases. The CVA2400A cannot be used without 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 +100oC. If the maximum expected ambient temperature is +50oC, then a heat sink is needed with thermal resistance equal to or less than: Rth = (100 - 50oC) = 4.5oC/W 11W Any FIGURE 3. CVA2400A DC Characteristics 110 100 90 80 70 60 50 40 30 20 10 0 5 4 3 VOLTAGE POWER POWER DISSIPATION (W) OUTPUT VOLTAGE (V) 2 1 1 2 3 4 5 6 7 1Q-45 INPUT VOLTAGE The CVA2400A maximum load is 600 to ground or V+. The output of CVA2400A is not short circuit proof. resistance to V+ or Ground should be > 600. CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2400A CORPORATION TYPICAL CHARACTERISTICS VOUT vs FREQUENCY vs I CC 50 45 40 35 VOUT (VP-P) VOUT 90 80 70 60 I CC 50 40 30 20 10 30 25 20 15 10 5 0 1 10 20 30 40 50 70 80 90 FREQUENCY (MHz) I CC (mA) 0 100 1Q-48 VOUT vs VIN vs I CC 80 70 60 50 V OUT (V) 80 70 60 50 I CC (mA) VOUT 40 30 20 10 0 I CC 40 30 20 10 0 6.0 1Q-47 0 0.5 1.0 1.5 2.0 2.5 3.0 VIN (VOLTS) 3.5 4.0 4.5 5.0 5.5 CALOGIC CORPORATION, 237 Whitney Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 CVA2400A CORPORATION TYPICAL CHARACTERISTICS (continued) RISE TIME 6.25V 6.25V FALL TIME 10V/DIV -3.75V -40ns 20ns/DIV 160ns 1S-32 -3.75V -40ns 20ns/DIV 10V/DIV 160ns 1S-33 CROSS HATCH WHITE BACKGROUND 7.25V 7.25V CROSS HATCH BLACK BACKGROUND 10V/DIV -2.75V 2.4ns 20ns/DIV 202.4ns 1S-35 -2.75V -47.6ns 20ns/DIV 10V/DIV 152.4ns 1S-34 Information furnished by Calogic is believed to be accurate and reliable. However, no responsibility is assumed for its use: nor for any infringement of patents 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 Place, Fremont, California 94539, Telephone: 510-656-2900, FAX: 510-651-3025 |
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