EL2150CS 데이터 시트보기 (PDF) - Elantec -> Intersil

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EL2150CS

125 MHz Single Supply, Clamping Op Amps

Elantec -> Intersil 

EL2150C EL2157C

125 MHz Single Supply Clamping Op Amps

Applications Information Contd

The maximum power dissipation allowed in a

package is determined according to 1

PDMAX

e

TJMAX – TAMAX

iJA

1

where

TJMAX e Maximum Junction Temperature

TAMAX e Maximum Ambient Temperature

iJA e Thermal Resistance of the Package

PDMAX e Maximum Power Dissipation in the

Package

The maximum power dissipation actually pro-

duced by an IC is the total quiescent supply cur-

rent times the total power supply voltage plus

the power in the IC due to the load or 2

PDMAX e VS ISMAXa(VS – VOUT)

VOUT

RL

2

where

VS e Total Supply Voltage

ISMAX e Maximum Supply Current

VOUT e Maximum Output Voltage of the Appli-

cation

RL e Load Resistance tied to Ground

If we set the two PDMAX equations 1 2

equal to each other and solve for VS we can get a

family of curves for various loads and output

voltages according to 3

RL

VS e

(TJMAX b

iJA

TAMAX)

a

(VOUT)2

(IS RL) a VOUT

3

Figures 11 through 13 show total single supply

voltage VS vs RL for various output voltage

swings for the PDIP and SOIC packages The

curves assume WORST CASE conditions of TA

e a85 C and IS e 6 5 mA

Single Supply Voltage

vs RLOAD for Various

VOUT (PDIP Package)

Figure 11

Single Supply Voltage

vs RLOAD for Various

VOUT (SO Package)

2150 – 69

Figure 12

Single Supply Voltage

vs RLOAD for Various

VOUT (SOT23-5 Package)

2150 – 70

Figure 13

2150 – 73

17

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