LS421, LS422, LS423,
LS424, LS425, LS426
Linear Integrated Systems
FEATURES
HIGH INPUT IMPEDANCE
HIGH GAIN
LOW POWER OPERATION
I
G
=0.25pA MAX
gfs=120µmho MIN
V
GS(off)
=2V MAX
S1
G2
G1
3
C
4
5
6
D2
S2
LOW LEAKAGE LOW DRIFT
MONOLITHIC DUAL N-CHANNEL JFET
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
Gate Voltage to Drain or Source
40V
-V
GSS
-V
DSO
-I
G(f)
Drain to Source Voltage
Gate Forward Current
40V
10mA
400mW @ +125°C
D1
D2
D1
2
S1
1
7
G2
G1
S2
TO-78
BOTTOM VIEW
Maximum Power Dissipation
Device Dissipation @ Free Air - Total
22 X 20 MILS
ELECTRICAL CHARACTERISTICS @ 25
°
C (unless otherwise noted)
SYMBOL
CHARACTERISTICS LS421 LS422 LS423 LS424 LS425 LS426 UNITS MAX CONDITIONS
10
25
40
10
25
40
µV/°C
V
DG
= 10V I
D
= 30µA
|∆V
GS1-2
/∆T| max. Drift vs. Temperature
T
A
=-55°C to +125°C
|V
GS1-2
| max.
V
GS(off)
V
GS
I
G
max.
-I
G
max.
-I
GSS
max.
-I
GSS
max.
SYMBOL
BV
GSS
BV
GGO
Y
fss
Y
fs
I
DSS
Offset Voltage
GATE VOLTAGE
Pinchoff Voltage
Operating Range
Operating
High Temperature
At Full Conduction
High Temperature
10
2.0
1.8
.25
250
1.0
1.0
15
2.0
1.8
.25
250
1.0
1.0
25
2.0
1.8
.25
250
1.0
1.0
10
3.0
2.9
.500
500
3.0
3.0
15
3.0
2.9
.500
500
3.0
3.0
25
3.0
2.9
.500
500
3.0
3.0
mV
V
V
pA
pA
pA
nA
V
DG
=10V
V
DS
=10V
V
DG
=10V
V
DG
=10V
T
A
= +125°C
V
DS
= 0V
T
A
= +125°C
V
GS
= 20V
I
D
= 30µA
I
D
= 1nA
I
D
= 30µA
I
D
= 30µA
CHARACTERISTICS
Breakdown Voltage
Gate-to-Gate Breakdown
TRANSCONDUCTANCE
Full Conduction
Typical Operation
DRAIN CURRENT
Full Conduction
MIN.
40
40
300
120
60
60
TYP.
60
--
--
200
--
--
MAX.
--
--
1500
350
1000
1800
UNITS
V
V
µmho
µmho
µA
µA
CONDITIONS
V
DS
= 0
I
G
= 1nA
I
G
= 1µA
V
DS
= 10V
V
DG
= 10V
LS421-3
LS424-6
I
D
= 0
V
GS
= 0
I
D
= 30µA
V
DS
= 10V
I
S
= 0
f= 1kHz
f= 1kHz
V
GS
= 0
Linear Integrated Systems
4042 Clipper Ct., Fremont, CA 94538 TEL: (510) 490-9160 • FAX: (510) 353-0261
SYMBOL
Y
OSS
Y
OS
CMR
CMR
CHARACTERISTICS
OUTPUT CONDUCTANCE
Full Conduction
Operating
COMMON MODE REJECTION
-20 log |∆V
GS1-2
/∆V
DS
|
-20 log |∆V
GS1-2
/∆V
DS
|
NOISE
Figure
Voltage
CAPACITANCE
Input
Reverse Transfer
MIN.
--
--
TYP.
--
0.1
MAX. UNITS
10
3.0
µmho
µmho
dB
dB
CONDITIONS
V
DS
= 10V
V
DG
= 10V
∆V
DS
= 10 to 20V
∆V
DS
= 5 to 10V
V
DG
= 10V
f= 10Hz
V
DG
= 10V
V
DG
= 10V
I
D
= 30µA
V
GS
= 0
I
D
= 30µA
I
D
= 30µA
I
D
= 30µA
R
G
= 10MΩ
--
--
90
90
--
--
NF
e
n
--
--
--
20
10
1.0
70
dB
nV/√Hz
I
D
= 30µA f= 10Hz
I
D
= 30µA f= 1kHz
V
GS
= 0
V
GS
= 0
f= 1MHz
f= 1MHz
C
ISS
C
RSS
--
--
--
--
3.0
1.5
pF
pF
V
DS
= 10V
V
DS
= 10V
TO-71
Six Lead
0.195
DIA.
0.175
0.030
MAX.
0.230
DIA.
0.209
0.150
0.115
TO-78
0.305
0.335
0.335
0.370
MAX.
0.040 0.165
0.185
MIN. 0.500
SEATING
PLANE
0.200
0.100
P-DIP
0.320
(8.13)
0.290
(7.37)
0.405
(10.29)
MAX.
S1 1
D1 2
SS 3
G1 4
8
7
6
5
G2
SS
D2
S2
0.016
0.019
DIM. A
0.016
0.021
DIM. B
0.029
0.045
2 3 4
1
5
8 7 6
6 LEADS
0.019 DIA.
0.016
0.100
0.500 MIN.
0.050
2 3 4
1
8
5
6
7
SOIC
0.150
(3.81)
0.158
(4.01)
0.100
45°
0.046
0.036
45°
0.048
0.028
0.028
0.034
0.188
(4.78)
0.197
(5.00)
S1
D1
D1
G1
SS
N/C
G1
1
2
3
4
8
7
6
5
G2
N/C
SS
G2
D2
D2
S2
S2
0.228
(5.79)
0.244
(6.20)
S1
D1
G1
N/C
N/C
G2
D2
S2
NOTES:
1. These ratings are limiting values above which the serviceability of any semiconductor may be impaired.
Linear Integrated Systems
4042 Clipper Ct., Fremont, CA 94538 TEL: (510) 490-9160 • FAX: (510) 353-0261
MAIN MENU
Home Page
Products
Support
Literature
Spice Models
Downloads
Contact Us
Distributors
Lead (Pb) Free / RoHS
Sales Reps
Company Info
Directions
Press Release
Site Map
Linear Integrated Systems Lead-Free / RoHS Fact
Sheet
The following is provided to address some of the more
commonly asked questions regarding how LIS is meeting
customer demand to supply product which is compliant to
the RoHS and WEEE Directives. If you have any
questions or need further information, please contact the
LIS factory for assistance.
Linear Integrated Systems can supply parts that do not
contain the following Banned Substances:
» Click Here «
for Lead-Free / RoHS
Part List
Asbestos
Azo Compounds
Cadmium
Cadmium Compounds
Chlorinated Paraffins
Hexavalent Chromium Compounds
Formaldehyde
Lead (Pb)
Mirex (Perchlordecone)
Mercury and Mercury Compounds
Organic Tin Compounds (Tributyl Tin & Triphenyl Tin)
Ozone Depletion Substances
PBB(Polybromobiphenyl)
PBDE (Polybromobiphenyl Biphenyls Ethers Category)
PCB (Polychlorinated Biphenyls)
Polychlorinated Naphthalene
Package Types:
The following packages do not and has never contained any of the above
mentioned substances:
Bare Die, (Metal Can) TO-18, TO-5, TO-52, TO-71, TO-72, TO-78, TO-99:
The following packages are available in Lead-Free / RoHS versions:
MSOP, QSOP, SOIC, SOT, TO-92.
Metal Can Facts:
Headers-Nickel with Gold Plating, Cans-100% Nickel
Plastic Package Facts:
Plating Material: Plastic Packages- Matte 100% Tin
Material of Lead Frame: Copper 194, or Alloy 42
Lead Content of the Plating Material: Lead Free (Less than 0.1%, 1000ppm
by weight)
Soldering: Maximum Temperature=260 Degree C, Maximum Time=20-40
seconds
Reflow Profile: Peak Temperature=260 Degree C, Peak Time=20-40
seconds
Acceptable number of Reflows: 3 times
Backward Compatibility: Lead Free packages can be soldered using
existing Sn-Pb solder and temperature profiles
Forward Compatibility: Lead Free Packages can be soldered using lead free
solders and the appropriate higher temperature profiles
Storage Conditions: Jedec Std. 20, Level 1
Questions:
Q1:
When does LIS plan to offer Lead Free packaging to its customers?
A1:
LIS has begun offering customers Lead Free packaging for plastic packages
as of 1/1/04, per customer request.
Q2:
When does LIS plan to offer RoHS compliant packaging to its customers?
A2:
LIS has begun offering customers RoHS compliant packaging for it plastic
packages as of 1/1/05, per customer request.
Q3:
Will LIS continue to offer Non-Lead Free (contains lead) packaging to its
customers?
A3:
Yes, LIS will continue to offer Non-Lead Free packaging, per customer
request.
Q4:
How do I order Lead Free parts versus Non-Lead Free Parts?
A4:
When ordering, specify "Lead-Free" in your part description on Purchase
Orders and Quotations.
Q5:
How do I order RoHS Compliant Parts versus Non-RoHS Compliant Parts?
A5:
When ordering, specify "RoHS Compliant" in your part description on
Purchase Orders and Quotations.
Q6:
How will I be able to identify a Lead-Free / RoHS Compliant Part versus a
Non-Lead Free Part / Non RoHS Compliant Part?
A6:
The Lead-Free RoHS Compliant Part will be marked with the letter "F".
Q7:
Are there any additional costs for ordering Lead-Free or RoHS Compliant
Parts?
A7:
Determined on a case by case basis.
Q8:
What is the LIS policy on Lead-Free implementation?
A8:
LIS will continue to supply requirements for both Lead-Free Parts and Non-
Lead Free parts per customer request.
Q9:
What is the LIS policy on RoHS Compliant Part implementation?
A9:
LIS has begun converting to ROHS Compliant mold compound on all plastic
Packages effective 1/1/05. All parts with date codes prior 1/1/05 are not made of
RoHS compliant mold compound.
Ordering Information:
1. RoHS Compliant (Lead-Free and PBDE-Free) Parts:
The part description must include the term "RoHS Compliant". Do not
include the letter "F", it must state RoHS Compliant. Purchase Orders that
do not specificately state RoHS Compliant will be shipped either "Leaded-
Parts"or "RoHS Compliant parts" depending on our inventory.
2. Leaded (Devices that contain lead) Parts:
The part description must include the term "Leaded Part". Purchase Orders
that do not specifically state "Leaded Part" will be shipped either "Leaded-
Parts" or "RoHS Compliant parts" depending on our inventory.
3. Disclaimer:
LIS will not be responsible for accepting the return of any parts that were not
ordered correctly by the customer.
Linear Integrated Systems · 4042 Clipper Court · Fremont · California · USA · 94538 - 6540
Web Site: http://www.linearsystems.com
Phone: 510-490-9160 Fax: 510-353-0261
京公网安备 11010802033920号
EEWORLD
