LSK389_14 datasheet(1/2 Pages) LINEAR

Part #	LSK389

Description	ULTRA LOW NOISE MONOLITHIC DUAL N-CHANNEL JFET AMPLIFIER

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Manufacturer	LINEAR [Linear Integrated Systems]

Direct Link	http://www.linearsystems.com

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Linear Integrated Systems

• 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490-9160 • Fax: 510 353-0261

Doc 201122 5/02/2014 Rev#A7 ECN# LSK389

FEATURES

ULTRA LOW NOISE

en = 0.9nV/

√Hz (typ)

TIGHT MATCHING

IVGS1-2I = 20mV max

HIGH BREAKDOWN VOLTAGE

BVGSS = 40V max

HIGH GAIN

Gfs = 20mS (typ)

LOW CAPACITANCE

25pF typ

IMPROVED SECOND SOURCE REPLACEMENT FOR 2SK389

ABSOLUTE MAXIMUM RATINGS1

@ 25 °C (unless otherwise stated)

Maximum Temperatures

Storage Temperature

-65 to +150°C

Junction Operating Temperature

-55 to +135°C

Maximum Power Dissipation

Continuous Power Dissipation @ +25°C

400mW

Maximum Currents

Gate Forward Current

IG(F) = 10mA

Maximum Voltages

Gate to Source

VGSS = 40V

Gate to Drain

VGDS = 40V

MATCHING CHARACTERISTICS @ 25°C (unless otherwise stated)

SYMBOL

CHARACTERISTIC

MIN

TYP

MAX

UNITS

CONDITIONS

GS2

GS1

V



Differential Gate to Source Cutoff

Voltage

20

m

V

VDS = 10V, ID = 1mA

DSS2

DSS1

I

Gate to Source Saturation Current Ratio

0.9

---

VDS = 10V, VGS = 0V

ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise stated)

SYMBOL

CHARACTERISTIC

MIN

TYP

MAX

UNITS

CONDITIONS

BVGSS

Gate to Source Breakdown Voltage

-40

V

VDS = 0, ID = -100µA

VGS(OFF)

Gate to Source Pinch-off Voltage

-0.15

-2

V

VDS = 10V, ID = 0.1µA

IDSS

Drain to Source Saturation

Current

LSK389A

2.6

6.5

mA

VDS = 10V, VGS = 0

LSK389B

6

12

LSK389C

10

20

LSK389D

17

30

IGSS

Gate to Source Leakage Current

-200

pA

VGS = -30V, VDS = 0

IG1G2

Gate to Gate Isolation Current

±1.0

µA

VG1-G2 = ±45V, ID = IS = 0A

LSK389

ULTRA LOW NOISE

MONOLITHIC DUAL

N-CHANNEL JFET AMPLIFIER

TO-71

Top View

SOIC-A

Top View

* For equivalent single version, see LSK170 family

Note: All MIN/TYP/MAX limits are absolute numbers. Negative signs indicate electrical polarity only.

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