LSK389
Linear Integrated Systems
FEATURES
ULTRA LOW NOISE
TIGHT MATCHING
HIGH BREAKDOWN VOLTAGE
HIGH GAIN
LOW CAPACITANCE
ABSOLUTE MAXIMUM RATINGS
1
@ 25 °C (unless otherwise stated)
Maximum Temperatures
Storage Temperature
Operating Junction Temperature
Maximum Power Dissipation
Continuous Power Dissipation @ +125 °C
Maximum Currents
Gate Forward Current
Maximum Voltages
Gate to Source
Gate to Drain
-65 to +150 °C
-55 to +135 °C
400mW
I
G(F)
= 10mA
V
GSS
= 40V
V
GDS
= 40V
ULTRA LOW NOISE
MONOLITHIC DUAL
N-CHANNEL JFET
e
n
= 0.9nV/√Hz (typ)
|V
GS1-2
| = 20mV max
BV
GSS
= 40V max
Y
fs
= 20mS (typ)
25pF typ
TO-71
BOTTOM VIEW
SOIC-A
S1
1
2
3
4
8
7
6
5
IMPROVED SECOND SOURCE REPLACEMENT FOR 2SK389
G1
D1
S1
2
1
7
3
5
6
G2
SS
D2
S2
S2
D2
G2
D1
SS
G1
*For equivalent single version, see LSK170 family.
MATCHING CHARACTERISTICS @ 25 °C (unless otherwise stated)
SYMBOL
V
GS1
−
V
GS2
I
DSS1
I
DSS2
CHARACTERISTIC
Differential Gate to Source Cutoff
Voltage
MIN
TYP
MAX
UNIT
CONDITIONS
20
0.9
mV
-
V
DS
= 10V, I
D
= 1mA
V
DS
= 10V, V
GS
= 0V
Gate to Source Saturation Current Ratio
ELECTRICAL CHARACTERISTICS @ 25 °C (unless otherwise stated)
SYMBOL
CHARACTERISTIC
MIN
TYP
MAX UNITS
CONDITIONS
BV
GSS
V
GS(OFF)
I
DSS
I
GSS
Gate to Source Breakdown Voltage
Gate to Source Pinch-off Voltage
Drain to Source Saturation
Current
LSK389A
LSK389B
LSK389C
40
0.15
2.6
6
10
2
6.5
12
20
200
V
V
mA
pA
V
DS
= 0, I
D
= 100µA
V
DS
= 10V, I
D
= 0.1µA
V
DS
= 10V, V
GS
= 0
V
GS
= -30V, V
DS
= 0
Gate to Source Leakage Current
Linear Integrated Systems
• 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490-9160 • Fax: 510 353-0261
ELECTRICAL CHARACTERISTICS CONT. @ 25 °C (unless otherwise stated)
SYMBOL
CHARACTERISTIC
MIN
TYP
MAX UNITS
CONDITIONS
V
DS
= 10V, V
GS
= 0, I
DSS
= 3mA,
f
= 1kHz
V
DS
= 10V, I
D
= 2mA,
f
= 1kHz,
NBW = 1Hz
V
DS
= 10V, I
D
= 2mA,
f
= 10Hz,
NBW = 1Hz
V
DS
= 10V, V
GS
= 0,
f
= 1MHz,
V
DG
= 10V, I
D
= 0,
f
= 1MHz,
Y
fs
e
n
e
n
C
ISS
C
RSS
Full Conduction Transconductance
Noise Voltage
Noise Voltage
Common Source Input Capacitance
Common Source Reverse Transfer Cap.
8
20
0.9
2.5
25
5.5
1.9
4
mS
nV/√Hz
nV/√Hz
pF
pF
ORDERING INFORMATION
LSK389 - A -
SOIC-8
I
DSS
Range
A 2.6 - 6.5 mA
B 6 - 12 mA
C 10 - 20 mA
Package
71
SOIC-8
TO-71 6L
SOIC-A 8L
PACKAGE DIMENSIONS
TO-71
Six Lead
0.195
DIA.
0.175
0.030
MAX.
0.230
DIA.
0.209
0.150
0.115
0.014
0.018
1
2
0.021
3
4
0.150
0.157
SOIC
8
7
6
5
0.050
0.189
0.196
6 LEADS
0.019 DIA.
0.016
0.100
0.500 MIN.
0.0040
0.0098
0.2284
0.2440
DIMENSIONS IN
INCHES
0.0075
0.0098
0.050
2 3
1
5
6
7
45°
0.046
0.036
0.048
0.028
1.
Absolute maximum ratings are limiting values above which serviceability may be impaired.
Information furnished by Linear Integrated Systems 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. Revised 07 December
2005.
Linear Integrated Systems
• 4042 Clipper Court • Fremont, CA 94538 • Tel: 510 490-9160 • Fax: 510 353-0261
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