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U440/441
Siliconix
P-37405—Rev. C, 04-Jul-94
1
Matched N-Channel JFET Pairs
Product Summary
Part Number
V
GS(off)
(V)
V
(BR)GSS
Min (V)
g
fs
Min (mS)
I
G
Typ (pA)
V
GS1
– V
GS2
Typ (mV)
U440
–1 to –6
–25
4.5
–1
10
U441
–1 to –6
–25
4.5
–1
20
Features
Two-Chip Design
High Slew Rate
Low Offset/Drift Voltage
Low Gate Leakage: 1 pA
Low Noise
High CMRR: 85 dB.
Benefits
Minimum Parasitics Ensuring Maximum
High-Frequency Performance
Improved Op Amp Speed, Settling Time Accuracy
Minimum Input Error/Trimming Requirement
Insignificant Signal Loss/Error Voltage
High System Sensitivity
Minimum Error with Large Input Signal
Applications
Wideband Differential Amps
High-Speed,
Temp-Compensated,
Single-Ended Input Amps
High-Speed Comparators
Impedance Converters
Description
The U440/441 are matched pairs of JFETs mounted in a
single TO-71 package. This two-chip design reduces
parasitics and gives better performance at very high
frequencies while ensuring extremely tight matching. These
devices are an excellent choice for use as wideband
differential amplifiers in demanding test and measurement
applications.
The hermetically-sealed TO-71 package is available with
full military screening per MIL-S-19500 (see Military
Information).
For similar products in SO-8 packaging see the
SST440/SST441 data sheet. For low-noise opions, see the
SST/U401 series data sheet. For low-leakage alternatives,
see the U421/423 data sheet.
TO-71
Top View
G
1
S
1
D
1
G
2
D
2
S
2
1
2
3
6
5
4
Absolute Maximum Ratings
Gate-Drain, Gate-Source Voltage
Gate-Gate Voltage
Gate Current
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead Temperature (
1
/
16
” from case for 10 sec.)
Storage Temperature
. . . . . . . . . . . . . . . . . . . . . . . . . . .
–25 V
50 V
50 mA
300 C
. . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . .
–65 to 200 C
Operating Junction Temperature
Power Dissipation :
–55 to 150 C
250 mW
500 mW
. . . . . . . . . . . . . . . . . .
Per Side
a
. . . . . . . . . . . . . . . . .
Total
b
. . . . . . . . . . . . . . . . . . . .
Notes
a.
b.
Derate 2 mW/ C above 25 C
Derate 4 mW/ C above 25 C
Updates to this data sheet may be obtained via facsimile by calling Siliconix FaxBack, 1-408-970-5600. Please request FaxBack document #70251.