N-Channel JFET

High Frequency Amplifier

U308 – U310

FEATURES

ABSOLUTE MAXIMUM RATINGS

Gate-Drain or Gate-Source Voltage . . . . . . . . . . . . . . . . -25V

Gate Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20mA

Storage Temperature . . . . . . . . . . . . . . . . . . . -65

Operating Temperature Range . . . . . . . . . . . -55

Lead Temperature (Soldering, 10sec) . . . . . . . . . . . . . +300

Power Dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 500mW

Derate above 25

NOTE: Stresses above those listed under "Absolute Maximum

Ratings" may cause permanent damage to the device. These are

stress ratings only and functional operation of the device at these or

any other conditions above those indicated in the operational sections

of the specifications is not implied. Exposure to absolute maximum

rating conditions for extended periods may affect device reliability.

ORDERING INFORMATION

Part

Package

Temperature Range

U308-10

Hermetic TO-52

-55

XU308-10

Sorted Chips in Carriers

-55

CORPORATION

PIN CONFIGURATION

D

S

(TO-52)

G, C

5021

SYMBOL

PARAMETER

U308

U309

U310

UNITS

TEST CONDITIONS

MIN TYP MAX MIN TYP MAX MIN TYP MAX

Gate Reverse Current

-150

-150

-150

pA

-150

-150

-150

nA

Gate-Source Breakdown Voltage

-25

-25

-25

V

Gate-Source Cutoff Voltage

-1.0

-6.0

-1.0

-4.0

-2.5

-6.0

Saturation Drain Current (Note 1)

12

60

12

30

24

60

mA

Gate-Source Forward Voltage

1.0

1.0

1.0

V

Common-Gate Forward

Transconductance (Note 1)

10

17

10

17

10

17

mS

f = 1kHz

Common Gate Output Conductance

250

250

250

µS

Drain-Gate Capacitance

2.5

2.5

2.5

pF

f = 1MHz

(Note 2)

Gate-Source Capacitance

5.0

5.0

5.0

Equivalent Short Circuit

Input Noise Voltage

10

10

10

nV

√

Hz

f = 100Hz

(Note 2)