Micross LS3954 Monolithic dual n-channel jfet Datasheet

LS3954
MONOLITHIC DUAL
N-CHANNEL JFET
The LS3954 is a Low Noise, Low Drift, Monolithic Dual N-Channel JFET
The LS3954 family are matched JFET pairs for
differential amplifiers. The LS3954 family of general
purpose JFETs is characterized for low and medium
frequency differential amplifiers requiring low offset
voltage, drift, noise and capacitance
The LS3954 family exhibits low capacitance - 6pF max
and a spot noise figure of - 0.5dB max. The part offers
a superior tracking ability.
The 8 Pin P-DIP and 8 Pin SOIC provide ease of
manufacturing, and the symmetrical pinout prevents
improper orientation.
(See Packaging Information).
LS3954 Applications:
ƒ
ƒ
Wideband Differential Amps
High Input Impedance Amplifiers
FEATURES
LOW DRIFT
LOW LEAKAGE
LOW NOISE
ABSOLUTE MAXIMUM RATINGS
@ 25°C (unless otherwise noted)
|∆ VGS1‐2 /∆T|= 5µV/°C max.
IG = 20pA TYP.
en = 10nV/√Hz TYP.
Maximum Temperatures
Storage Temperature
‐65°C to +200°C
Operating Junction Temperature
+150°C
Maximum Voltage and Current for Each Transistor – Note 1
‐VGSS
Gate Voltage to Drain or Source
60V
‐VDSO
Drain to Source Voltage
60V
‐IG(f)
Gate Forward Current
50mA
Maximum Power Dissipation
Device Dissipation @ Free Air – Total
400mW @ 25°C
MATCHING CHARACTERISTICS @ 25°C UNLESS OTHERWISE NOTED
SYMBOL
CHARACTERISTICS VALUE UNITS CONDITIONS
| V GS1‐2 / T| max.
DRIFT VS.
10
µV/°C
VDG=20V, ID=200µA
TEMPERATURE
TA=‐55°C to +125°C
| V GS1‐2 | max.
OFFSET VOLTAGE
5
mV
VDG=20V, ID=200µA
ELECTRICAL CHARACTERISTICS @ 25°C (unless otherwise noted)
SYMBOL
CHARACTERISTICS
MIN.
TYP.
BVGSS
Breakdown Voltage
60
‐‐
BVGGO
Gate‐To‐Gate Breakdown
60
‐‐
TRANSCONDUCTANCE
YfSS
Full Conduction
1000
2000
YfS
Typical Operation
500
700
|YFS1‐2 / Y FS|
Mismatch
‐‐
0.6
DRAIN CURRENT
IDSS
Full Conduction
0.5
2
|IDSS1‐2 / IDSS|
Mismatch at Full Conduction
‐‐
1
GATE VOLTAGE
VGS(off) or Vp
Pinchoff voltage
1
2
VGS(on)
Operating Range
0.5
‐‐
GATE CURRENT
‐IG
Operating
‐‐
20
‐IG
High Temperature
‐‐
‐‐
‐IG
Reduced VDG
‐‐
5
‐IGSS
At Full Conduction
‐‐
‐‐
OUTPUT CONDUCTANCE
YOSS
Full Conduction
‐‐
‐‐
YOS
Operating
‐‐
0.1
|YOS1‐2|
Differential
‐‐
0.01
COMMON MODE REJECTION
CMR
‐20 log | VGS1‐2/ VDS|
‐‐
100
CMR
‐20 log | VGS1‐2/ VDS|
‐‐
75
NOISE
NF
Figure
‐‐
‐‐
en
Voltage
‐‐
‐‐
CAPACITANCE
CISS
Input
‐‐
‐‐
CRSS
Reverse Transfer
‐‐
‐‐
CDD
Drain‐to‐Drain
‐‐
0.1
MAX.
‐‐
‐‐
UNITS
V
V
CONDITIONS
VDS = 0
ID=1µA
I G= 1nA
ID= 0
I S= 0
3000
1000
3
µmho
µmho
%
VDG= 20V
VDG= 20V
5
5
mA
%
VDG= 20V
VGS= 0V
4.5
4
V
V
VDS= 20V
VDS=20V
ID= 1nA
ID=200µA
50
50
‐‐
100
pA
nA
pA
pA
5
1
0.1
µmho
µmho
µmho
‐‐
‐‐
dB
dB
0.5
15
dB
nV/√Hz
6
2
‐‐
pF
pF
pF
VGS= 0V f = 1kHz
ID= 200µA
Click To Buy
VDG= 20V
TA= +125°C
VDG= 10V
VDG= 20V
ID= 200µA
ID= 200µA
VDS= 0
VDG= 20V
VDG= 20V
VGS= 0V
ID= 200µA
∆VDS = 10 to 20V
ID=200µA
∆VDS = 5 to 10V
ID=200µA
VDS= 20V VGS= 0V
RG= 10MΩ
f= 100Hz
NBW= 6Hz
VDS=20V ID=200µA f=10Hz NBW=1Hz
VDS= 20V
VGS= 0V
VDG= 20V
f= 1MHz
ID= 200µA
Note 1 – These ratings are limiting values above which the serviceability of any semiconductor may be impaired
PDIP / SOIC (Top View)
Micross Components Europe
Available Packages:
LS3954 in PDIP / SOIC
LS3954 available as bare die
Please contact Micross for full package and die dimensions
Tel: +44 1603 788967
Email: [email protected]
Web: http://www.micross.com/distribution
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.
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