Micross LS4117A Ultra-high input impedance n-channel jfet Datasheet

LS4117A
N-CHANNEL JFET
Linear Systems replaces discontinued Siliconix 2N4117A
The LS4117A is an Ultra-High Input Impedance N-Channel JFET
The LS4117A 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 highimpedance sensitive front-end amplifier.
LS4117A Benefits:
ƒ
ƒ
ƒ
ƒ
Insignificant Signal Loss / Error Voltage
with High-Impedance Source
Low Power Consumption (Battery)
Maximum Signal Output, Low Noise
High Sensitivity to Low-Level Signals
LS4117A Applications:
ƒ
ƒ
ƒ
ƒ
High-Impedance Transducer
Smoke Detector Input
Infrared Detector Amplifier
Precision Test Equipment
FEATURES
DIRECT REPLACEMENT FOR SILICONIX 2N4117A
LOW POWER
MINIMUM CIRCUIT LOADING
ABSOLUTE MAXIMUM RATINGS
@ 25°C (unless otherwise noted)
IDSS<90 µA
IGSS<1 pA
Maximum Temperatures
Storage Temperature
Operating Junction Temperature
Maximum Power Dissipation
Continuous Power Dissipation
MAXIMUM CURRENT
Gate Current (Note 1)
MAXIMUM VOLTAGES
Gate to Drain or Gate to Source (Note 2)
LS4117A ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise noted)
SYMBOL
CHARACTERISTIC
MIN
TYP.
BVGSS
Gate to Source Breakdown Voltage
‐40
‐‐
VGS(off)
Gate to Source Cutoff Voltage
‐0.6
‐‐
IDSS
Gate to Source Saturation Current
0.03
‐‐
IGSS
Gate Leakage Current
‐‐
‐‐
‐‐
‐‐
gfs
Forward Transconductance(Note 3)
70
‐‐
gos
Output Conductance
‐‐
‐‐
Ciss
Input Capacitance
‐‐
‐‐
Crss
Reverse Transfer Capacitance
‐‐
‐‐
‐65°C to +175°C
‐55°C to +150°C
300mW
50mA
‐40V
Click To Buy
NOTES
MAX
‐‐
‐1.8
0.09
‐1
‐2.5
210
3
3
1.5
UNITS
V
V
mA
pA
µmho
CONDITIONS
IG = ‐1µA, VDS = 0V
VDS = 10V, ID = 1nA
VDS = 10V, VGS = 0V
VGS = ‐20V, VDS = 0V
VGS = ‐20V, VDS = 0V, 150°C
VDS = 10V, VGS = 0V, f = 1kHz
pF
VDS = 10V, VGS = 0V, f = 1MHz
1 . Absolute maximum ratings are limiting values above which LS4117A serviceability may be impaired.
2. Due to symmetrical geometry, these units may be operated with source and drain leads interchanged
3. This parameter is measured during a 2ms interval 100ms after power is applied. (Not a JEDEC condition.)
Micross Components Europe
Available Packages:
TO-92 (Bottom View)
LS4117A in TO-92
LS4117A in bare die.
Tel: +44 1603 788967
Email: [email protected]
Web: http://www.micross.com/distribution
Please contact Micross for full
package and die dimensions
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.
Micross Components Ltd, United Kingdom, Tel: +44 1603 788967, Fax: +44 1603788920, Email: [email protected] Web: www.micross.com/distribution.aspx
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