®
OPA2111
Dual Low Noise Precision
Difet
®
OPERATIONAL AMPLIFIER
FEATURES
q
LOW NOISE: 100% Tested, 8nV/
√
Hz max at
10kHz
q
q
q
q
q
LOW BIAS CURRENT: 4pA max
LOW OFFSET: 500
µ
V max
LOW DRIFT: 2.8
µ
V/
°
C
HIGH OPEN-LOOP GAIN: 114dB min
HIGH COMMON-MODE REJECTION:
96dB min
APPLICATIONS
q
PRECISION INSTRUMENTATION
q
DATA ACQUISITION
q
TEST EQUIPMENT
q
PROFESSIONAL AUDIO EQUIPMENT
q
MEDICAL EQUIPMENT
q
DETECTOR ARRAYS
DESCRIPTION
The OPA2111 is a high precision monolithic
dielectrically isolated FET (
Difet
) operational ampli-
fier. Outstanding performance characteristics allow its
use in the most critical instrumentation applications.
Noise, bias current, voltage offset, drift, open-loop
gain, common-mode rejection, and power supply re-
jection are superior to BIFET
®
amplifiers.
Very low bias current is obtained by dielectric isola-
tion with on-chip guarding.
Laser trimming of thin-film resistors gives very low
offset and drift. Extremely low noise is achieved with
patented circuit design techniques. A cascode design
allows high precision input specifications and reduced
susceptibility to flicker noise.
Standard dual op amp pin configuration allows up-
grading of existing designs to higher performance
levels.
BIFET
®
National Semiconductor Corp.,
Difet
®
Burr-Brown Corp.
*Patented
OPA2111 Simplified Circuit
(Each Amplifier)
+V
CC
8
–In
+In
Noise-Free
Cascode*
Output
–V
CC
4
International Airport Industrial Park • Mailing Address: PO Box 11400
Tel: (520) 746-1111 • Twx: 910-952-1111 • Cable: BBRCORP •
© 1984 Burr-Brown Corporation
• Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
PDS-540E
Printed in U.S.A. October, 1993
BURR-BROWN [ BURR-BROWN CORPORATION ]
