HA5002 데이터 시트보기 (PDF) - Intersil

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HA5002

110MHz, High Slew Rate, High Output Current Buffer

Intersil 

HA-5002

larger valued capacitors since the impedance of the

capacitor is dependent on frequency.

It is also recommended that the bypass capacitors be

connected close to the HA-5002 (preferably directly to the

supply pins).

Operation at Reduced Supply Levels

The HA-5002 can operate at supply voltage levels as low as

±5V and lower. Output swing is directly affected as well as

slight reductions in slew rate and bandwidth.

Short Circuit Protection

The output current can be limited by using the following circuit:

RLIM

=

----------V----+-----------

IOUTMAX

=

-----------V---------------

IOUTMAX

V+ IOUTMAX = 200mA

(CONTINUOUS)

V1+

IN

V1-

RLIM

V2+

OUT

V2-

RLIM

Capacitive Loading

The HA-5002 will drive large capacitive loads without oscillation

but peak current limits should not be exceeded. Following the

formula I = Cdv/dt implies that the slew rate or the capacitive

load must be controlled to keep peak current below the

maximum or use the current limiting approach as shown. The

HA-5002 can become unstable with small capacitive loads

(50pF) if certain precautions are not taken. Stability is

enhanced by any one of the following: a source resistance in

series with the input of 50Ω to 1kΩ; increasing capacitive load

to 150pF or greater; decreasing CLOAD to 20pF or less; adding

an output resistor of 10Ω to 50Ω; or adding feedback

capacitance of 50pF or greater. Adding source resistance

generally yields the best results.

V-

1.8

1.6

1.4

PDIP

1.2

1.0 CAN

0.8

0.6

SOIC

0.4

PLCC

PDMAX

=

-------T----J---M----A----X-----–-----T----A--------

θJC + θCS + θSA

Where: TJMAX = Maximum Junction Temperature of the

Device

TA = Ambient

θJC = Junction to Case Thermal Resistance

θCS = Case to Heat Sink Thermal Resistance

θSA = Heat Sink to Ambient Thermal Resistance

0.2

0.0

25

QUIESCENT POWER DISSIPATION

AT ±15V SUPPLIES

45

65

85

105

TEMPERATURE (°C)

Graph is based on:

PDMAX

=

T----J---M-----A----X-----–-----T----A-

θJA

125

FIGURE 2. MAXIMUM POWER DISSIPATION vs TEMPERATURE

6

FN2921.11

March 8, 2006

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