LT1210CS-TR Просмотр технического описания (PDF) - Linear Technology

Номер в каталоге

Компоненты Описание

Список матч

LT1210CS-TR

1.1A, 35MHz Current Feedback Amplifier

Linear Technology 

LT1210

APPLICATI S I FOR ATIO

T7 Package, 7-Lead TO-220

Thermal Resistance (Junction-to-Case) = 5°C/W

Calculating Junction Temperature

The junction temperature can be calculated from the

equation:

TJ = (PD)(θJA) + TA

where:

TJ = Junction Temperature

TA = Ambient Temperature

PD = Device Dissipation

θJA = Thermal Resistance (Junction-to-Ambient)

As an example, calculate the junction temperature for the

circuit in Figure 7 for the SO and R packages assuming a

70°C ambient temperature.

The device dissipation can be found by measuring the

supply currents, calculating the total dissipation and then

subtracting the dissipation in the load and feedback

network.

PD = (76mA)(10V) – (1.4V)2/ 10 = 0.56W

5V

A 76mA

+

LT1210

SD

–

VO

2V

0V

–2V

10Ω

VO = 1.4VRMS

220Ω

–5V

680Ω

1210 F07

Figure 7

then:

TJ = (0.56W)(46°C/W) + 70°C = 96°C

for the SO package with 1000 sq. mm topside

heat sinking

TJ = (0.56W)(27°C/W) + 70°C = 85°C

for the R package with 1000 sq. mm topside heat

sinking

Since the maximum junction temperature is 150°C,

both packages are clearly acceptable.

TYPICAL APPLICATIONS

Precision × 10 High Current Amplifier

VIN

+

LT1097

–

500pF

330Ω

+

LT1210

COMP

– SD

0.01µF

3k

OUTPUT OFFSET: < 500µV

SLEW RATE: 2V/µs

BANDWIDTH: 4MHz

STABLE WITH CL < 10nF

9.09k

1k

OUT

1210 TA03

12

CMOS Logic to Shutdown Interface

15V

+

LT1210

– SD

5V

–15V

10k

2N3904

24k

1210 TA04

1210fa

Share Link: