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ANALOGOEVICES FAX-ON-DEMAND HOTLINE
W
Page
2
ANALOG
Low-Bias-Current,
High-Stability
JFET
Operational
Amplifier
DEVICES
OP-41*
FEATURES
.
.
.
.
.
.
77°Typ
OBS
ORDERING
INFORMATION
(J.LV)
TO-99
500
SO
S-PIN
-
-
OP41EJ
1000
750
2000
PLASTIC
a-PIN
OP41AJ-
250
t
t
PACKAGE
=
TA 2S"C
Vas MAX
.
The OP-41 's cascade input stage boosts CMR to over 100dB,
improves CMR linearity, and stabilizes bias current with changing common-mode voltage. The linear common-mode rejection
of 100dB min is unusually good for a FET input amplifier. The
OP-41 consumes only 750)lA supply current and has a powersupply rejection ratio of 25)lV/V, making it an ideal choice for
battery-operated systems. Despite the low supply-drain, the
slew-rate is a respectable 1.3V/IlS. and symmetrical Using
zener-zap trimming techniques. offset voltage is adjusted to
below SOOIlV
which eliminates the need for external nulling in
many applications. The OP-41's guaranteed gain of 1 million
into a 2kH load. combined with the linear 100dB minimum
CMR. vastly improves linearity over competitive low-cost devices. Linearity is excellent in both low-gain and high-gain
amplifier configurations. In voltage follower applications CMR
effects dominate linearity. and in high-gain applications openloop gain dominates linearity, hence the performance advantage
of the OP-41.
Low Bias Current
5pAMax
Low Current Consumption. . . . . . . . . . . . . . . . . 1.0mA Max
HighGain
1000V/mVMin
High Common-Mode Rejection. . . . . . . . . . . . . 10OdBMin
Symmetrical Slew-Rates. . . . . . . . . . . . . . . . . :t1.0V/ps Mln
Low Harmonic Distortion. . . . . . . . . . . . . . <0.01% at 5kHz
. Phase Margin
. Available
InDieForm
OP41BJOP41FJ
-
-
-
-
-
-
OP41GP
OP41GS
OPERATING
TEMPERATURE
RANGE
OLE
MIL
INO
MIL
INO
XINO
PIN CONNECTIONS
For devices processed in total compliance to MIL.STO-883. add /883 after part
number. Consult factory for 883 data sheet.
Burn-in is available on commercial and industrial temperature range parts in
cerdlp. plastic dip, and TO-can packages.
GENERAL DESCRIPTION
EPOXYMINI-DIP
(P-Suffix)
8-PINSO
(S.Suffix)
The OP-41 JFET -input op amp features a SpA max bias current
with an open-loop gain of over 1 million. 77° of phase margin
provides exceptional stability, even in unity-gain with capacitive loads. The output is guaranteed stable with 2S0pF loads at
unity-gain, and will typically drive several thousand pF. Transient response is extremely clean. and is considerably improved
over industry-standard JFET amplifiers.
T~
E
NUll
6 N.C.
-IN 2
'11'1 3
5 NULL
4 '1- ICASE)
TO-99
(J-Suffix)
+v
+IN
-IN
ouT
-v
.Manufactured
underthe
NULL
following U.S. patent: 4,538,115.
-1-
7 V'
6 OuT
SIMPLIFIED SCHEMATIC
NULL
I