Datasheet > CVA3424A

CVA3424A

更新时间： 2024-01-07 01:59:13

品牌	Logo	应用领域
CALOGIC		驱动器
页数	文件大小	规格书
4页	42K
描述
185MHz CRT Driver

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技术参数
数据手册

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CVA3424A 技术参数

是否无铅：	含铅	是否Rohs认证：	不符合
生命周期：	Active	零件包装代码：	SFM
包装说明：	TO-220	针数：	3
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.90.00.00	风险等级：	5.73
标称带宽：	150000 kHz	商用集成电路类型：	VIDEO AMPLIFIER
JESD-30 代码：	R-PSFM-T11	信道数量：	1
功能数量：	1	端子数量：	11
最高工作温度：	90 °C	最低工作温度：	-20 °C
封装主体材料：	PLASTIC/EPOXY	封装形状：	RECTANGULAR
封装形式：	FLANGE MOUNT	峰值回流温度（摄氏度）：	NOT SPECIFIED
认证状态：	Not Qualified	最大压摆率：	55 mA
最大供电电压 (Vsup)：	80 V	最小供电电压 (Vsup)：	80 V
表面贴装：	NO	温度等级：	OTHER
端子形式：	THROUGH-HOLE	端子位置：	SINGLE
处于峰值回流温度下的最长时间：	NOT SPECIFIED	Base Number Matches：	1

CVA3424A 数据手册

CVA3424A / CVA3424

CORPORATION

APPLICATIONS INFORMATION

Basic Circuit Configuration

Output Characteristics

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.

The CVA3424 is intended to be used as the final stage of very

fast video circuits. The nominal load capacitance is 10pF. Other

values can be accommodated since the output stage is an

emitter follower and is fairly insensitive to load capacitance.

However, a wire connection of some length is unavoidable, that

causes objectionable ringing due to a resonant circuit. To avoid

this a damping resistor must be used in series with the lead

inductance. Also a resistor is necessary to protect the amplifier

against arching. A resistor of 30-50Ω will provide protection but

will slow down the response. The lead inductance may be

artificially increased by a tenth of a microHenry to obtain

An internally bypassed capacitor is included inside the

package, however, for low frequencies an electrolytic

capacitor is recommended.

CVA3424 has an internal feedback resistor of 3.66KΩ. In the

absence of any input signal, the V_outDC is set by

desired peak.

readjustment of damping resistor, as stated by equation (1).

Any change in inductance will require

R_F

R = √_C^L(1)

(DC) = (1 +

) V (DC)

out

R_B

If an input signal is applied, the gain is set by

The output of CVA3424 is not short circuit proof. Any

resistance to V+ or Ground should be >600Ω.

out

= ( ) V_in

R_x

Thermal Characteristics

When low frequency square waves are amplified, some droop

will occur due to a large change in thermal dissipation in the

input transistors. To overcome this an R-C series feedback

network is suggested with 300kΩ and 46pF values. Under

normal operating conditions the CVA3424 will dissipate up to

6W. The maximum allowed case temperature is +90^oC. To

calculate maximum heatsink thermal resistance use equation (2).

Input and Transfer Characteristics

An input current swing of ±4.5mA causes the output to change

by ±25V.

A resistor of 270Ω in series with the input will give a voltage

gain of -13.

Input pins are internal dc feedback nodes and thus have low

impedances. These pins must be fed from a series RC

network for high frequency emphasis.

(90 − 50°)

Rth =

= 6.7°C/W

FALL TIME

RISE TIME

BANDWIDTH

0dB

100

2ns/DIV

MHz

1 234

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