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Micross Components Ltd, United Kingdom, Tel: +44 1603 788967, Fax: +44 1603788920, Email: chipcomponents@micross.com Web: www.micross.com/distribution.aspx
FEATURES
DIRECTREPLACEMENTFORSILICONIX2N4117A
LOWPOWERIDSS<90µA
MINIMUMCIRCUITLOADINGIGSS<1pA
ABSOLUTEMAXIMUMRATINGS
@25°C(unlessotherwisenoted)
MaximumTemperatures
StorageTemperature‐65°Cto+175°C
OperatingJunctionTemperature‐55°Cto+150°C
MaximumPowerDissipation
ContinuousPowerDissipation 300mW
MAXIMUMCURRENT
GateCurrent(Note1)50mA
MAXIMUMVOLTAGES
GatetoDrainorGatetoSource(Note2)‐40V

2N4117AELECTRICALCHARACTERISTICS@25°C(unlessotherwisenoted)
SYMBOLCHARACTERISTICMINTYP.MAXUNITSCONDITIONS
BVGSSGatetoSourceBreakdownVoltage‐40 ‐‐ ‐‐ VIG=‐1µA,VDS=0V
VGS
(
off
)
GatetoSourceCutoffVoltage‐0.6 ‐‐ ‐1.8V VDS=10V,ID=1nA
IDSSGatetoSourceSaturationCurrent0.03 ‐‐ 0.09mAVDS=10V,VGS=0V
IGSSGateLeakageCurrent ‐‐ ‐‐ ‐1pAVGS=‐20V,VDS=0V
‐‐ ‐‐ ‐2.5VGS=‐20V,VDS=0V,150°C
gfsForwardTransconductance(Note3)70 ‐‐ 210µmhoVDS=10V,VGS=0V,f=1kHz
gosOutputConductance ‐‐ ‐‐ 3
CissInputCapacitance ‐‐ ‐‐ 3
pF
VDS=10V,VGS=0V,f=1MHz
CrssReverseTransferCapacitance ‐‐ ‐‐ 1.5


NOTES
1.Absolutemaximumratingsarelimitingvaluesabovewhich2N4117Aserviceabilitymaybeimpaired.
2.Duetosymmetricalgeometry,theseunitsmaybeoperatedwithsourceanddrainleadsinterchanged
3.Thisparameterismeasuredduringa2msinterval100msafterpowerisapplied.(NotaJEDECcondition.)
The 2N4117A is an Ultra-High Input Impedance N-Channel JFET
2N4117A
N-CHANNEL JFET
Linear S
y
stems re
p
laces discontinued Siliconix 2N4117
A
Micross Components Europe
Tel: +44 1603 788967
Email: chipcomponents@micross.com
Web: http://www.micross.com/distribution
TO-71 (Bottom View)
Available Packages:
2N4117A in TO-71
2N4117A in bare die.
Please contact Micross for full
package and die dimensions
2N4117A Benefits:
Insignificant Signal Loss / Error Voltage
with High-Impedance Source
Low Power Consumption (Battery)
Maximum Signal Output, Low Noise
Hi
g
h Sensitivit
y
to Low-Level Si
g
nals
The 2N4117A provides ultra-high input impedance. The
device is specified with a 1-pA limit and typically
operates at 0.2 pA. The part is ideal for use as a high-
im
peda
n
ce
se
n
s
i
t
iv
e
fr
o
n
t
-
e
n
d
a
m
p
lifi
e
r.
2N4117A Applications:
High-Impedance Transducer
Smoke Detector Input
Infrared Detector Amplifier
Precision Test Equipment