Datasheet > SA90-0001-DC000

SA90-0001-DC000

更新时间： 2024-11-24 22:25:19

品牌	Logo	应用领域
泰科 - TE		驱动器
页数	文件大小	规格书
5页	343K
描述
Dual Linear Driver for Vector Modulators

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中文翻译

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SA90-0001-DC000 数据手册

Dual Linear Driver for Vector

Modulators

V 2.00

Features

CSP-9

Linearizes M/A-COM’s PIN Diode Vector Modulators

Over a 360° Phase Range

Dual Channels Allow One Driver per Vector Modulator

Output Currents up to 12 mA

Operates with a Single Supply Voltage of +5V

Low Quiescent Currents

Single Control Voltage for Each Channel

6 x 4 mm Chip Scale Package

Test Boards with Vector Modulators are Available

Tape and Reel Packaging Available

Description

M/A-COM's MADRCC0002 is a dual, break point free

driver that produces a logarithmic output current suitable

for linearizing PIN diode based vector modulators. This

driver, in conjunction with the external components, as

defined in Figure 1, produces a linearized transfer function

between the input control voltage of the driver and the

attenuation / phase output of the vector modulator. The

MADRCC0002 has been optimized for linearizing

M/A-COM’s Vector Modulators (see Table 1), but will

function well with most types of cathode grounded vector

modulators. The driver is packaged in a 6 x 4 mm Chip

Scale Package for commercial SMT applications. A typical

schematic for a dual linearizer driving a vector modulator is

shown in Figure 1.

Absolute Maximum Ratings ¹

Circuit Description:

(Reference Figures 1, 2 and 3)

Parameter

Absolute Maximum

+20 V

Note that this is a dual driver. Only the top circuit will be

described, because the bottom circuit is identical. The input

divider, R1 and the sum of R2 and R3, sets the overall

transfer function of the circuit. To increase the transfer

function, decrease the Control Voltage and the value of R1.

Temperature compensation is a function of the temperature

coefficient of the thermistor, R3, and the ratio of R2 to R3,

and can only be optimized once the transfer function and

linearity component values have been established. Varying

the value of R4 will optimize the linearity of the VVA. One

can achieve a more linear transfer function by driving the

attenuator over a smaller portion of its dynamic range. Note

that when the vector modulators called out in Table 1 are

driven with the dual linearizer, both amplitude and phase

are affected, which makes it hard to define linearity. The

individual transfer function of each voltage variable

attenuator in the vector modulator (See Figure 2 for the

block diagram) is linearized as a function of voltage. The

two VVAs in the block diagram are the quad hybrids that

are terminated by two PIN diodes. See Figure 3 for

the transfer function of the SA90-0001 vector modulator

(phase and attenuation vs. control voltages).

+V_CC

IN A, IN B

-0.5V < Input < Vcc +0.5V

20 mA

REF A, REF B

Output Short Circuit Current

Operating Temperature

Storage Temperature

-40°C to +85°C

-65°C to +125°C

150 mW

Package Power Dissipation

Control Voltage

Lead Temperature

300ºC for 10 seconds

1. Operation of this device above any one of these

parameters may cause permanent damage.

12 3 4 5

中文翻译

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