Micross LSJ308 SOT-23 N-channel jfet Datasheet

LSJ308
N-CHANNEL JFET
Linear Systems replaces discontinued Siliconix J308
The LSJ308 is a high frequency n-channel JFET
offering a wide range and low noise performance. The
SOT-23 package is well suited for cost sensitive
applications and mass production.
(See Packaging Information).
High Power Low Noise gain
Dynamic Range greater than 100dB
Easily matched to 75Ω input
LSJ308 Applications:
ƒ
ƒ
ƒ
Gpg = 11.5dB
NF = 2.7dB
Maximum Temperatures
Storage Temperature
Operating Junction Temperature
Maximum Power Dissipation
Continuous Power Dissipation
MAXIMUM CURRENT
Gate Current
MAXIMUM VOLTAGES
Gate to Drain Voltage or Gate to Source Voltage
LSJ308 Benefits:
ƒ
ƒ
ƒ
FEATURES
DIRECT REPLACEMENT FOR SILICONIX J308
OUTSTANDING HIGH FREQUENCY GAIN
LOW HIGH FREQUENCY NOISE
ABSOLUTE MAXIMUM RATINGS @ 25°C1
UHV / VHF Amplifiers
Mixers
Oscillators
LSJ308 ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise noted)
SYMBOL
CHARACTERISTIC
MIN
BVGSS
Gate to Source Breakdown Voltage
‐25
VGS(F)
Gate to Source Forward Voltage
0.7
VGS(off)
Gate to Source Cutoff Voltage
‐1
IDSS
Drain to Source Saturation Current2
12
IG
Gate Operating Current (Note 3)
‐‐
rDS(on)
Drain to Source On Resistance
‐‐
TYP.
‐‐
‐‐
‐‐
‐‐
‐15
35
MAX
‐‐
1
‐6.5
60
‐‐
‐‐
UNIT
V
mA
pA
Ω
‐55°C to +150°C
‐55°C to +135°C
350mW
10mA
‐25V
CONDITIONS
VDS = 0V, IG = ‐1µA
VDS = 0V, IG = 10mA
VDS = 10V, ID = 1nA
VDS = 10V, VGS = 0V
VDG = 9V, ID = 10mA
VGS = 0V, ID = 1mA
LSJ308 DYNAMIC ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise noted)
SYMBOL
CHARACTERISTIC
MIN
TYP.
gfs
Forward Transconductance
8
14
gos
Output Conductance
‐‐
110
Ciss
Input Capacitance
‐‐
4
Crss
Reverse Transfer Capacitance
‐‐
1.9
en
Equivalent Noise Voltage
6
‐‐
MAX
‐‐
250
5
2.5
‐‐
UNIT
mS
µS
pF
VDS = 10V, VGS = ‐10V , f = 1MHz
nV/√Hz
VDS = 10V, ID = 10mA , f = 100Hz
LSJ308 HIGH FREQUENCY CHARACTERISTICS @ 25°C (unless otherwise noted)
SYMBOL
CHARACTERISTIC
MIN
TYP
MAX
UNIT
CONDITIONS
dB
dB
Click To Buy
NF
Noise Figure
Gpg
Power Gain3
gfg
Forward Transconductance
gog
Output Conductance
f = 105MHz
f = 450MHz
f = 105MHz
f = 450MHz
f = 105MHz
‐‐
‐‐
‐‐
‐‐
‐‐
1.5
2.7
16
11.5
14
‐‐
‐‐
‐‐
‐‐
‐‐
f = 450MHz
‐‐
13
‐‐
f = 105MHz
‐‐
0.16
‐‐
f = 450MHz
‐‐
0.55
‐‐
CONDITIONS
VDS = 10V, ID = 10mA , f = 1kHz
VDS = 10V, ID = 10mA
mS
Note 1 ‐ Absolute maximum ratings are limiting values above which LSJ308 serviceability may be impaired.
Note 2 ‐ Pulse test : PW ≤ 300µs, Duty Cycle ≤ 3%
Note 3 ‐ Measured at optimum input noise match
Micross Components Europe
Available Packages:
SOT-23 (Top View)
LSJ308 in SOT-23
LSJ308 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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