LS421-6 Datasheet, PDF (1/2 Pages) Linear Integrated Systems – LOW LEAKAGE LOW DRIFT MONOLITHIC DUAL N-CHANNEL JFET

Linear Integrated Systems
LS421, LS422, LS423,
LS424, LS425, LS426
LOW LEAKAGE LOW DRIFT
MONOLITHIC DUAL N-CHANNEL JFET
FEATURES
HIGH INPUT IMPEDANCE
HIGH GAIN
I_G=0.25pA MAX
gfs=120µmho MIN
LOW POWER OPERATION
V_GS(off)=2V MAX
ABSOLUTE MAXIMUM RATINGS NOTE 1
@ 25°C (unless otherwise noted)
Maximum Temperatures
Storage Temperature
-65° to +150°C
Operating Junction Temperature
+150°C
Maximum Voltage and Current for Each Transistor NOTE 1
-V_GSS
Gate Voltage to Drain or Source
-V_DSO
Drain to Source Voltage
-I_G(f)
Gate Forward Current
Maximum Power Dissipation
40V
40V
10mA
Device Dissipation @ Free Air - Total
400mW @ +125°C
S1 G2
D1
D2
G1
S2
22 X 20 MILS
C
G1 ⁴
S2
3
5
D1 ₂
6 ^D2
1
7
S1
G2
TO-78
BOTTOM VIEW
ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise noted)
SYMBOL
CHARACTERISTICS LS421 LS422 LS423 LS424 LS425 LS426 UNITS MAX CONDITIONS
|∆V_GS1-2 /∆T| max. Drift vs. Temperature 10
|V_GS1-2| max.
Offset Voltage
10
GATE VOLTAGE
25 40 10
15 25 10
25 40
15 25
µV/°C
mV
V_DG= 10V I_D= 30µA
T_A=-55°C to +125°C
V_DG=10V I_D= 30µA
V_GS(off)
Pinchoff Voltage
2.0 2.0 2.0 3.0 3.0 3.0
V
V_DS=10V I_D= 1nA
V_GS
I_Gmax.
-I_Gmax.
-I_GSSmax.
-I_GSSmax.
Operating Range
Operating
High Temperature
At Full Conduction
High Temperature
1.8 1.8 1.8 2.9 2.9 2.9
V
.25 .25 .25 .500 .500 .500
pA
250 250 250 500 500 500
pA
1.0 1.0 1.0 3.0 3.0 3.0
pA
1.0 1.0 1.0 3.0 3.0 3.0
nA
V_DG=10V I_D= 30µA
V_DG=10V I_D= 30µA
T_A= +125°C
V_DS= 0V
V_GS= 20V
T_A= +125°C
SYMBOL
BV_GSS
BV_GGO
Y_fss
Y_fs
I_DSS
CHARACTERISTICS
Breakdown Voltage
Gate-to-Gate Breakdown
TRANSCONDUCTANCE
Full Conduction
Typical Operation
DRAIN CURRENT
Full Conduction
MIN.
40
40
TYP.
60
--
MAX.
--
--
UNITS
V
V
CONDITIONS
V_DS= 0
I_G= 1µA
I_G= 1nA
I_D= 0
I_S= 0
300 --
120 200
60
--
60
--
1500
350
1000
1800
µmho
µmho
µA
µA
V_DS= 10V
V_DG= 10V
LS421-3
LS424-6
V_GS= 0
I_D= 30µA
V_DS= 10V
f= 1kHz
f= 1kHz
V_GS= 0
Linear Integrated Systems 4042 Clipper Ct., Fremont, CA 94538 TEL: [phone] • FAX: [phone]