Document
185MHz CRT Driver
CORPORATION
CVA3424A / CVA3424
FEATURES DESCRIPTION The CVA3424 Family is a video driver amplifier designed specially to drive high resolution color monitors. With rise and fall time of under 2.5ns and 185MHz bandwidth, this device will provide excellent drive capability for the 2000 x 1600, 1600 x 1280 and 1280 x 1024 monitors. ORDERING INFORMATION Part CVA3424AT CVA3424T Package TO-220 TO-220 Temperature -20oC to +90oC -20oC to +90oC
• Bandwidth . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 185MHz • Rise/Fall Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.5ns . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40VP-P • Swing • Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80V • CRT Driver for 2000 x 1600, 1600 x 1280 and 1280 x 1024
Monitors
APPLICATIONS
CONNECTION DIAGRAM AND SIMPLIFIED SCHEMATIC
11 10 9 8 7 6 5 4 3 2 1
Vcc NC Vout GND GND GND NC NC Vin NC NC
VCC 11 RF 3.66k Ω Vin 3 RB 142 Ω CVA3424 Vout 9
GND 6,7,8
1B-04
PIN 1 DESIGNATOR T11A
1C-04
CVA3424A / CVA3424
CORPORATION
ABSOLUTE MAXIMUM RATINGS Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85V Storage Temperature . . . . . . . . . . . . . . . . . . -25oC to +100oC Operating Temperature . . . . . . . . . . . . . . . . . -20oC to +90oC Lead Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . +300oC
DC ELECTRICAL CHARACTERISTICS VS = 80V, CL = 10pF, Vout = 40Vp-p. See Figure 1. TA = +125oC unless otherwise noted.
SYMBOL ICC VinDC VoutDC AV CHARACTERISTICS Supply Current Iput DC Level Output DC Level Voltage Gain Gain Matching 1.4 34 11 MIN TYP 45 1.6 40 13 0.2 MAX 55 1.8 46 15 UNITS mA V V V dB
AC ELECTRICAL CHARACTERISTICS VS = 80V, CL = 10pF, Vout = 40Vp-p. See Figure 1. TA = +125oC unless otherwise noted.
CVA3424A SYMBOL tr tf BW Le OS / US CHARACTERISTICS MIN Rise Time Fall Time Bandwidth Linearity Overshoot / Undershoot TYP 2.2 2.5 185 5 8 MAX 2.9 2.9 MIN TYP 2.5 2.7 150 5 8 MAX 3.5 3.5 ns ns MHz % % CVA3424 UNITS
FIGURE 1. TEST CIRCUIT
C3 C2 R1 INPUT
R4 R2 11 VCC 9 Vout D2 6,7,8 GND 3 CVA3424 Vin R5 D1
C4
C6
VC C 1
R6
L1 OUTPUT CL
R1 = 270 Ω R2 = 12k Ω (1 W) R4 = 300k Ω R5 = 15 Ω R6 = 15 Ω
C2 = Variable 4 to 150pF Typical 27pF C3 = 46pF C4 = 10 µ f/160V
C6 = 0.01 µ f/160V C L = 10pF (Including Parasitics)
D1 = DS464 D2 = DS464 L1 = 150nH
1B-05
CVA3424A / CVA3424
CORPORATION
APPLICATIONS INFORMATION Basic Circuit Configuration The CVA3424 is a transimpedance amplifier with two stage feedback amplifier configurations. Any change in input current will be reflected as change in output voltage swing. A resistor in series with the input will change the CVA3424 into a voltage amplifier. The output is an emitter follower. Because of the complementary circuitry employed, there is no need for load or pull up resistor. An internally bypassed capacitor is included inside the package, however, for low frequencies an el.