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2N3956

MONOLITHIC DUAL

N-CHANNEL JFET

The 2N3956 is a Low Noise, Low Drift, Monolithic Dual N-Channel JFET

The 2N3956 family are matched JFET pairs for

differential amplifiers. The 2N3956 family of general

purpose JFETs is characterized for low and medium

frequency differential amplifiers requiring low offset

voltage, drift, noise and capacitance

The 2N3956 family also exhibits low capacitance - 6pF

max and a spot noise figure of -0.5dB max. The part

offers a superior tracking ability.

The hermetically sealed TO-71 and TO-78 packages

are well suited for high reliability and harsh environment

applications.

(See Packaging Information).

FEATURES

LOW DRIFT

LOW LEAKAGE

LOW NOISE

ABSOLUTE MAXIMUM RATINGS

@ 25°C (unless otherwise noted)

|∆ V

GS1‐2

/∆T|= 5µV/°C max.

= 20pA TYP.

= 10nV/√Hz TYP.

2N3956 Applications:

Wideband Differential Amps

High Input Impedance Amplifiers

Maximum Temperatures

Storage Temperature

‐65°C to +200°C

Operating Junction Temperature

+150°C

Maximum Voltage and Current for Each Transistor – Note 1

‐V

GSS

Gate Voltage to Drain or Source

60V

‐V

DSO

Drain to Source Voltage

60V

‐I

G(f)

Gate Forward Current

50mA

Maximum Power Dissipation

Device Dissipation @ Free Air – Total 400mW @ 25°C

MATCHING CHARACTERISTICS @ 25°C UNLESS OTHERWISE NOTED

SYMBOL

CHARACTERISTICS VALUE UNITS CONDITIONS

| V

GS1‐2

/ T| max.

DRIFT VS.

µV/°C V

=20V, I

=200µA

TEMPERATURE

=‐55°C to +125°C

| V

GS1‐2

| max.

OFFSET VOLTAGE

=20V, I

=200µA

MAX.

‐‐

3000

1000

4.5

‐‐

100

0.1

‐‐

0.5

‐‐

UNITS

µmho

nV/√Hz

CONDITIONS

= 0 I

=1µA

= 1nA I

= 0 I

= 0

= 20V V

= 0V f = 1kHz

= 20V I

= 200µA

= 20V V

= 0V

= 20V I

= 1nA

=20V I

=200µA

= 20V I

= 200µA

= +125°C

= 10V I

= 200µA

= 20V V

= 0

= 20V V

= 0V

= 20V I

= 200µA

ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise noted)

SYMBOL

CHARACTERISTICS

MIN.

TYP.

GSS

Breakdown Voltage

‐‐

GGO

Gate‐To‐Gate Breakdown

‐‐

TRANSCONDUCTANCE

fSS

Full Conduction

1000

2000

Typical Operation

500

700

FS1‐2

/ Y

Mismatch

‐‐

0.6

DRAIN CURRENT

DSS

Full Conduction

0.5

DSS1‐2

/ I

DSS

Mismatch at Full Conduction

‐‐

GATE VOLTAGE

(off) or V

Pinchoff voltage

(on)

Operating Range

0.5

‐‐

GATE CURRENT

‐I

Operating

‐‐

‐I

High Temperature

‐‐

‐I

Reduced V

‐‐

‐I

GSS

At Full Conduction

‐‐

OUTPUT CONDUCTANCE

OSS

Full Conduction

‐‐

Operating

‐‐

0.1

OS1‐2

Differential

‐‐

0.01

COMMON MODE REJECTION

CMR

‐20 log | V

GS1‐2

/ V

‐‐

100

CMR

‐20 log | V

GS1‐2

/ V

‐‐

NOISE

Figure

‐‐

Voltage

‐‐

CAPACITANCE

ISS

Input

‐‐

RSS

Reverse Transfer

‐‐

Drain‐to‐Drain

‐‐

0.1

Note 1 – These ratings are limiting values above which the serviceability of any semiconductor may be impaired

Click To Buy

∆V

= 10 to 20V I

=200µA

∆V

= 5 to 10V I

=200µA

= 20V V

= 0V R

= 10MΩ

f= 100Hz NBW= 6Hz

=20V I

=200µA f=10Hz NBW=1Hz

= 20V V

= 0V f= 1MHz

= 20V I

= 200µA

TO-71 / TO-78 (Bottom View)

Available Packages:

2N3956 in TO-71 / TO-78

2N3956 available as bare die

Please contact

Micross

for full package and die dimensions

Micross Components Europe

Tel: +44 1603 788967

Email:

chipcomponents@micross.com

Web:

http://www.micross.com/distribution

Information furnished by Linear Integrated Systems and Micross Components is believed to be accurate and reliable. However, no responsibility is assumed for its use; nor for any infringement of patents or

other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Linear Integrated Systems.

型号	2N3956(TO-78)	2N3956(TO-71)	2N3956-TO-78	2N3956-TO-71
描述	Transistor	Transistor	TRANSISTOR 2 CHANNEL, N-CHANNEL, Si, SMALL SIGNAL, JFET, TO-78, HERMETIC SEALED, TO-78, 6 PIN, FET General Purpose Small Signal	TRANSISTOR 2 CHANNEL, N-CHANNEL, Si, SMALL SIGNAL, JFET, TO-71, HERMETIC SEALED, TO-71, 6 PIN, FET General Purpose Small Signal
Reach Compliance Code	compli	compli	unknow	unknow
Base Number Matches	1	1	1	1