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LS3954A

Part Number	LS3954A
Manufacturer	Micross
Description	Low Noise
Published	Jun 13, 2011
Detailed Description	LS3954A MONOLITHIC DUAL N-CHANNEL JFET The LS3954A is a Low Noise, Low Drift, Monolithic Dual N-Channel JFET The LS3954...
Datasheet	LS3954A PDF File

Overview

LS3954A MONOLITHIC DUAL N-CHANNEL JFET The LS3954A is a Low Noise, Low Drift, Monolithic Dual N-Channel JFET The LS3954A family are matched JFET pairs for differential amplifiers.
The LS3954A family of general purpose JFETs is characterized for low and medium frequency differential amplifiers requiring low offset voltage, drift, noise and capacitance The LS3954A family exhibits low capacitance - 6pF max and a spot noise figure of - 0.
5dB max.
The part offers a superior tracking ability.
The 8 Pin P-DIP and 8 Pin SOIC provide ease of manufacturing, and the symmetrical pinout prevents improper orientation.
(See Packaging Information).
FEATURES LOW DRIFT LOW LEAKAGE LOW NOISE ABSOLUTE MAXIMUM RATINGS   @ 25°C (unless otherwise noted) |∆ VGS1‐2 /∆T|= 5µV/°C max.
IG = 20pA TYP.
en = 10nV/√Hz TYP.
LS3954A 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 ‐VGSS Gate Voltage to Drain or Source 60V ‐VDSO Drain to Source Voltage 60V ‐IG(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.
5 µV/°C VDG=20V, ID=200µA TEMPERATURE TA=‐55°C to +125°C | V GS1‐2 | max.
OFFSET VOLTAGE 5 mV VDG=20V, ID=200µA MAX.
‐‐ ‐‐ 3000 1000 3 5 5 4.
5 4 50 50 ‐‐ 100 5 1 0.
1 ‐‐ ‐‐ 0.
5 15 6 2 ‐‐ UNITS V V µmho µmho % mA % V V pA nA pA pA µmho µmho µmho dB dB dB nV/√Hz pF pF pF CONDITIONS VDS = 0                  ID=1µA       I G= 1nA               ID= 0               IS= 0 VDG= 20V         VGS= 0V      f = 1kHz      VDG= 20V         ID= 200µA      VDG= 20V              VGS= 0V VDS= 20V     ...

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